[\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row _builder_version=”4.25.0″ _module_preset=”default” custom_margin=”0px||||false|false” custom_padding=”0px||||false|false” global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.25.0″ _module_preset=”default” global_colors_info=”{}”][et_pb_text _builder_version=”4.27.5″ _module_preset=”default” custom_margin=”0px||||false|false” custom_padding=”0px||||false|false” global_colors_info=”{}”]<\/p>\n
Featured Question<\/strong><\/h1>\n[\/et_pb_text][et_pb_toggle title=”Q: I need to order a lot of wall-mounted zone sensors for a project, but I want to make sure I\u2019m getting the right ones. What information do you need from me so you can quote the correct model?” open_toggle_background_color=”#FFFFFF” closed_toggle_background_color=”#efefef” admin_label=”Q: I need to order a lot of wall-mounted zone sensors for a project, but I want to make sure I\u2019m getting the right ones. What information do you need from me so you can quote the correct model?” _builder_version=”4.27.5″ _module_preset=”default” title_font=”|700|||||||” title_font_size=”14px” body_font_size=”12px” global_colors_info=”{}” locked=”off”]<\/p>\n
Great question \u2014 getting a few key details upfront helps us quote the right sensor quickly and accurately. We\u2019ve listed out all of the questions our tech will ask when you call for a quote.<\/p>\n
Why This Matters<\/strong><\/p>\nThere are a lot of options, and while base pricing between sensor types doesn\u2019t vary much, added features (display, humidity, override, specific setpoint ranges) can affect cost and compatibility.<\/p>\n
If you can provide these details, we can turn your quote around quickly and make sure you get exactly what your application requires.<\/p>\n
Download a checklist of these questions here.<\/strong><\/a><\/p>\n\n- Is it a Zone Sensor or a Thermostat?<\/strong><\/li>\n<\/ol>\n
\n- A thermostat directly controls equipment (like an air handler or fan coil).<\/li>\n
- A zone sensor sends temperature information back to a BAS or VAV controller.<\/li>\n
- Quick rule: If it wires into your BAS, it\u2019s typically a sensor, not a stat.<\/li>\n<\/ul>\n
\n- What Temperature Sensor Type Do You Need?<\/strong><\/li>\n<\/ol>\n
At minimum, the sensor will measure temperature. The most common types are:<\/p>\n
\n- 10k thermistor (most common)<\/li>\n
- 20k thermistor<\/li>\n
- 1k RTD (often used with JCI systems)<\/li>\n<\/ul>\n
Check your controller specs to confirm which one is required.<\/p>\n
\n- Do You Need a Display?<\/strong><\/li>\n<\/ol>\n
\n- Should the occupant be able to see the room temperature?<\/li>\n
- Some models include an LCD display, similar to a thermostat.<\/li>\n<\/ul>\n
\n- Is Humidity Sensing Required?<\/strong><\/li>\n<\/ol>\n
\n- Do you need to measure relative humidity (RH) as well?<\/li>\n
- Should RH be shown on the display?<\/li>\n
- What output does your controller require for RH?\n
\n- Common outputs: 4\u201320mA or 0\u201310V<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n
\n- Do You Need Setpoint Adjustment?<\/strong><\/li>\n<\/ol>\n
Many customers want occupants to adjust the temperature slightly.<\/p>\n
\n- Is a slider or push-button setpoint adjustment needed?<\/li>\n
- What input does your controller require?\n
\n- Resistance range (example: 4.8k to 24.8k ohms)<\/li>\n
- Or 0\u201310V<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n
This is important \u2014 if the sensor\u2019s output doesn\u2019t match what the controller expects, the space won\u2019t adjust properly.<\/p>\n
\n- Do You Need Occupancy Override?<\/strong><\/li>\n<\/ol>\n
This allows someone to temporarily switch from unoccupied to occupied mode (for nights or weekends).<\/p>\n
\n- Should there be a push-button override?<\/li>\n
- Does your controller expect:\n
\n- A simple dry contact (switch closure)?<\/li>\n
- Or a momentary short across terminals?<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n
[\/et_pb_toggle][\/et_pb_column][\/et_pb_row][et_pb_row column_structure=”1_2,1_2″ _builder_version=”4.27.5″ _module_preset=”default” global_colors_info=”{}”][et_pb_column type=”1_2″ _builder_version=”4.27.5″ _module_preset=”default” global_colors_info=”{}”][et_pb_text admin_label=”Actuators & Dampers” _builder_version=”4.27.5″ _module_preset=”default” custom_padding=”0px|0px|0px|0px|false|false” border_width_bottom=”1px” global_colors_info=”{}”]<\/p>\n
Actuators & Dampers<\/h2>\n
[\/et_pb_text][et_pb_toggle title=”Q: What in the world do all these numbers and letters mean in relation to Belimo valves and actuators?” open_toggle_background_color=”#FFFFFF” closed_toggle_background_color=”#efefef” admin_label=”Q: What in the world do all these numbers and letters mean in relation to Belimo valves and actuators?” _builder_version=”4.27.5″ _module_preset=”default” title_font=”|700|||||||” title_font_size=”14px” body_font_size=”12px” global_colors_info=”{}”]<\/p>\n
We\u2019ve all been there\u2014no seriously! You\u2019re new to the industry and no one told you that you now need to learn a whole new language just to order parts. And help seems unattainable. Or at least it did for a recent customer. But Kele\u2019s tech team hopped on a call and broke down the lingo\u2014which made us think \u2026<\/p>\n
How many other industry rookies need a play-by-play to learn the language???<\/p>\n
We\u2019re guessing a few\u2014so without further ado \u2026<\/p>\n
Decoding the Valve Part Number\u00a0<\/strong>B313B<\/strong><\/a>:<\/strong><\/p>\n\n- B<\/strong>\u00a0= Ball Valve<\/li>\n
- 3<\/strong>\u00a0= Three-Way Configuration<\/li>\n
- 13<\/strong>\u00a0= Flow Coefficient (Cv)<\/li>\n
- B<\/strong>\u00a0= Chrome Ball (not brass)<\/li>\n<\/ul>\n
Understanding the Actuator Part Number\u00a0<\/strong>TR24-3-300US<\/strong><\/a>:<\/strong><\/p>\n\n- TR24-3<\/strong>\u00a0= 24V Floating Actuator<\/li>\n
- SR<\/strong>\u00a0(if present) = Modulating Actuator<\/li>\n
- US<\/strong>\u00a0= Designation for U.S. sales, no functional difference<\/li>\n
- Dash 300<\/strong>\u00a0= Internal bulk sale reference, not relevant to the functionality<\/li>\n<\/ul>\n
We hope this helps! And take it a step further\u2014here\u2019s some best practices to follow when ordering:<\/p>\n
\n- When requesting a quote, specify if both the actuator and valve body are needed.<\/li>\n
- Request parts as an\u00a0assembled unit<\/strong>\u00a0(e.g., \u201cB313B with TR24 actuator\u201d) to simplify ordering.<\/li>\n
- Belimo provides\u00a0reference materials<\/strong>, and the Kele tech team is always ready to share a catalog page to assist with future orders.<\/li>\n<\/ul>\n
[\/et_pb_toggle][et_pb_toggle title=”Q: How can I replace my failing actuator on my basement heat pump system with a more reliable and cost-effective solution?” open_toggle_background_color=”#FFFFFF” closed_toggle_background_color=”#efefef” admin_label=”Q: What in the world do all these numbers and letters mean in relation to Belimo valves and actuators?” _builder_version=”4.27.5″ _module_preset=”default” title_font=”|700|||||||” title_font_size=”14px” global_colors_info=”{}”]<\/p>\n
There were a few parameters that we needed to keep in mind:<\/p>\n
\n- The actuator is expensive, becoming obsolete, and unreliable.<\/li>\n
- The customer wanted to replace the entire system with a more modern and cost-effective solution.<\/li>\n
- It\u2019s on a heat pump loop, and it\u2019s used for heat injection into the loop to maintain 70 to 80 degrees going through a heat exchanger.<\/li>\n
- The customer has a generator backup system, so a fail-safe valve is not necessary.<\/li>\n<\/ul>\n
So, was the Kele tech team able to address the concerns of this customer?<\/p>\n
Of course! They recommended the Belimo B2 Series 2-way and B3 Series 3-way ball valves and the Honeywell T775 Series single- or multi-loop standalone controller.<\/p>\n
The Belimo B2 Series 2-way and B3 Series 3-way ball valves are used for two-position, floating or proportional control of HVAC hot or chilled water. The valves come assembled with direct coupled Belimo electric actuators with spring return or non-spring return operation.<\/p>\n
Features<\/p>\n
\n- Equal percentage characteristic (2-way)<\/li>\n
- Large Cv range from 0.8 to 170<\/li>\n
- Assembled, ready for installation<\/li>\n
- Floating, two-position, or proportional control<\/li>\n<\/ul>\n
The Honeywell Model T775 is a standalone multi-point and multi-loop controller designed for a wide range of applications. The I\/O point mix is unit-specific with temperature, humidity, and pressure input models available. Relay or analog output models may be selected as well. Single-loop, two-loop and reset controllers may be selected, all including a seven-day time clock for output disable or night setback. The relay output controllers have adjustable differential control algorithms. Analog output controllers have adjustable throttling range, proportional plus integral (PI), or proportional, integral, and derivative (PID) control. The backlit display is easy to read, and the menu-driven setup is simple. The T775 is available in NEMA 1 or NEMA 4X enclosures for the most demanding environments.<\/p>\n
Features<\/p>\n
\n- Standalone controller<\/li>\n
- Multiple power input (24, 120, or 240 VAC)<\/li>\n
- Single- or dual-loop models<\/li>\n
- Throttling range, PI, and PID tunable modulating models<\/li>\n
- Adjustable differential two-position models<\/li>\n
- Humidity, pressure, and universal input models<\/li>\n
- Two-position 10A relay model<\/li>\n
- Analog output 0 or 2 to 10 VDC, 4-20 mA, and 135\u03a9 models<\/li>\n
- Integral seven-day time clock for night setback or shutdown<\/li>\n
- Remote night setback or shutdown input<\/li>\n
- \u00b0F or \u00b0C temperature display<\/li>\n
- Daylight savings time compensation<\/li>\n<\/ul>\n
[\/et_pb_toggle][et_pb_text admin_label=”Alarms & Indication” _builder_version=”4.27.5″ _module_preset=”default” custom_padding=”0px|0px|0px|0px|false|false” border_width_bottom=”1px” global_colors_info=”{}”]<\/p>\n
Alarms & Indication<\/h2>\n
[\/et_pb_text][et_pb_toggle title=”Q: I received a push-pull E-Stop N4X SS surface switches. While the switch is labeled correctly, it doesn\u2019t appear to be a push-button, pull-reset device. Instead, the button feels like a momentary, spring-return push button. Is this the correct switch?” open_toggle_background_color=”#FFFFFF” closed_toggle_background_color=”#efefef” admin_label=”Q: I received a push-pull E-Stop N4X SS surface switches. While the switch is labeled correctly, it doesn\u2019t appear to be a push-button, pull-reset device. Instead, the button feels like a momentary, spring-return push button. Is this the correct switch?” _builder_version=”4.27.5″ _module_preset=”default” title_font=”|700|||||||” title_font_size=”14px” body_font_size=”12px” global_colors_info=”{}”]<\/p>\n
Yes\u2014this is the correct switch. The push button on the ESM series (any model with PPO<\/strong> in the description) can be misleading at first glance. When shipped, the E-stop arrives in the reset<\/strong> position, which makes it feel like a momentary button.<\/p>\nTo engage it as a maintained E-stop, you need to pull the button out firmly<\/strong>. Once pulled far enough, a green stripe becomes visible<\/strong>, indicating that the contacts are engaged and the switch is in the maintained (pushed) position.<\/p>\nBottom line: although it feels momentary at first, it is functioning exactly as designed once fully pulled out.<\/p>\n
![\"\"](\"\/\/www.kele.com\/content\/wp-content\/uploads\/2025\/12\/FTF-Dec-Image.jpg\")
<\/p>\n
[\/et_pb_toggle][et_pb_text admin_label=”Control Valves” _builder_version=”4.27.5″ _module_preset=”default” custom_padding=”0px|0px|0px|0px|false|false” border_width_bottom=”1px” global_colors_info=”{}”]<\/p>\n
Control Valves<\/h2>\n
[\/et_pb_text][et_pb_toggle title=”Q: How can I effectively monitor and control a fan in a server closet using a BACnet system?” open_toggle_background_color=”#FFFFFF” closed_toggle_background_color=”#efefef” admin_label=”Q: How can I effectively monitor and control a fan in a server closet using a BACnet system?” _builder_version=”4.27.5″ _module_preset=”default” title_font=”|700|||||||” title_font_size=”14px” body_font_size=”12px” global_colors_info=”{}”]<\/p>\n
There were a few parameters that we needed to keep in mind:<\/p>\n
\n- The customer\u2019s existing setup includes a 120V supply fan and a return air vent in the server closet.<\/li>\n
- The customer wants to monitor fan status and room temperature.<\/li>\n
- The customer is concerned about cost and prefers a simpler solution over using an I\/O controller and additional sensors.<\/li>\n<\/ul>\n
So, what did the Kele Tech Team find for a solution?<\/p>\n
Our techs had their recommendation already in hand by the time the call ended! They recommended the\u00a0Viconics Staged BACnet Thermostat with Humidity<\/a>, specifically the\u00a0VT8650U5000B<\/a>.<\/p>\nThe VT8650 room controllers are both application-specific and programmable. This enables the modification of pre-configured control sequences or scripting to modify existing behavior. The VT8650 room controllers provide exception control of staged heating and cooling equipment such as packaged roof-top units. Their configurable control sequences, economizer, and scheduler functionalities deliver all the flexibility necessary for optimal indoor air quality applications.<\/p>\n
Product Series Features<\/strong><\/p>\n\n- Suitable for both commercial and hospitality markets and systems<\/li>\n
- Customizable color digital touchscreen interface with multi-language support<\/li>\n
- Fully programmable control sequences using scripting<\/li>\n
- On-board configuration interface utility<\/li>\n
- Configurable sequence of operations<\/li>\n
- Configurable Economizer<\/li>\n
- Configurable Scheduler<\/li>\n
- Change of value (COV) function for BMS integration<\/li>\n
- Universal inputs and outputs including a CO2 sensor input and Fresh air station input<\/li>\n
- Optional PIR occupancy sensor<\/li>\n
- Advanced occupancy functions for commercial and lodging applications<\/li>\n
- Optional wireless motion sensors, door and window switches (with optional ZigBee Pro\u00ae card) available<\/li>\n
- Supported networking protocols:<\/li>\n
- BACnet MS\/TP (B) (selectable)<\/li>\n
- Modbus (B) (selectable)<\/li>\n
- ZigBee Pro and ZigBee Green Power wireless mesh network (P) (optional with communication module purchased separately)<\/li>\n<\/ul>\n
[\/et_pb_toggle][et_pb_toggle title=”Q: Can I pair a B238 valve with an AFRB24 actuator, and how do I make sure it\u2019s set up as fail close (normally closed)?” open_toggle_background_color=”#FFFFFF” closed_toggle_background_color=”#efefef” admin_label=”Q: Can I pair a B238 valve with an AFRB24 actuator, and how do I make sure it\u2019s set up as fail close (normally closed)?” _builder_version=”4.27.5″ _module_preset=”default” title_font=”|700|||||||” title_font_size=”14px” body_font_size=”12px” global_colors_info=”{}”]<\/p>\n
Yes, you can pair the\u00a0B238 valve<\/a>\u00a0with the\u00a0AFRB24 actuator<\/a>, and the configuration\u2014whether it is fail close (normally closed) or fail open (normally open)\u2014depends on how the valve is mounted to the actuator. The actuator itself can operate either way; it\u2019s simply a matter of valve orientation. If the unit is assembled in the field and the direction is incorrect, it can easily be flipped to change from normally open to normally closed, or vice versa.<\/p>\nWhen ordered through us, we can set up and ship the valve and actuator already configured as normally closed by specifying B238 + AFRB24-NC on the order. This ensures the assembly arrives ready to install and operate as intended, without the customer needing to make any adjustments.<\/p>\n
In this case, our team confirmed the correct configuration with the customer, explained how the fail-close setup works, and arranged to have the B238 valve and AFRB24 actuator assembled in-house as a normally closed unit before shipment, providing a complete, ready-to-install solution.<\/p>\n
[\/et_pb_toggle][et_pb_toggle title=”Q: Can I replace my old pneumatic actuator with an electric one without having to change out the entire valve?” open_toggle_background_color=”#FFFFFF” closed_toggle_background_color=”#efefef” admin_label=”Q: Can I replace my old pneumatic actuator with an electric one without having to change out the entire valve?” _builder_version=”4.27.5″ _module_preset=”default” title_font=”|700|||||||” title_font_size=”14px” body_font_size=”12px” global_colors_info=”{}”]<\/p>\n
The answer is \u2026 Yes!<\/p>\n
In this case, the customer had several small 3-way hot water valves with pneumatic actuators that were being controlled by old thermostats. The goal was to start modernizing the system by switching to electric actuators that could take a 0\u201310V signal from new Johnson Controls wall thermostats and eventually be tied into a building automation system. Because the valve bodies themselves were still in good condition, replacing the actuators was the most efficient way to begin the upgrade without incurring the higher cost of full valve replacements.<\/p>\n
Our technician explained that a\u00a0Johnson Controls VA-7152-1001 actuator<\/strong><\/a>\u00a0would mount directly to the existing half-inch valve without additional hardware. These actuators are compatible with 24V, 0\u201310V control signals and are also in stock, making them a convenient and economical retrofit choice.<\/p>\nThe customer then asked for a fail-safe option as well so the building owner could decide which approach worked best. For that, the technician suggested a Belimo model.\u00a0Belimo UGVL actuators<\/strong><\/a>\u00a0allow the fail position to be adjusted in the field and are known for their long-term reliability, making them a strong option for customers planning a more long-term upgrade path.<\/p>\nIn the end, the customer was able to take back multiple choices \u2014economical retrofit and an upgrade with added flexibility and longevity \u2014 leaving the final decision to the building owner.<\/p>\n
[\/et_pb_toggle][et_pb_toggle title=”Q: I need to replace an old and discontinued Schneider valve and Belimo actuator that were working together. Can you help?” open_toggle_background_color=”#FFFFFF” closed_toggle_background_color=”#efefef” admin_label=”Q: I need to replace an old and discontinued Schneider valve and Belimo actuator that were working together. Can you help?” _builder_version=”4.27.5″ _module_preset=”default” title_font=”|700|||||||” title_font_size=”14px” body_font_size=”12px” global_colors_info=”{}”]<\/p>\n
Nothing is worse than realizing the part you need to replace has been discontinued. It\u2019s a pain if you don\u2019t have someone to help you sort through all the possible parts that might work as a replacement.<\/p>\n
Recently, a customer had this exact problem. The Kele tech team rallied for the challenge and got everything squared away. Here are some things they had to keep in mind before they started making product recommendations:<\/p>\n
\n- The customer needed a valve compatible with the discontinued one<\/li>\n
- It needed to be a valve and actuator combo<\/li>\n
- The new valve HAD to be capable of handling BOTH hot and cold water<\/li>\n
- It also needed to be able to handle 0-10v, 2-10V, or 4-20m control signals<\/li>\n<\/ul>\n
So, what did our tech team recommend?<\/p>\n
They found a cost-effective alternative to the discontinued actuator in the\u00a0Schnieder actuator M400A-VB<\/a>\u00a0that would mount directly to a valve. The Schneider Electric Forta Series globe valve actuator is a programmable linear actuator family for use with VB7000, VB8000, and VB9000 series two- and three-way valves. The actuators are easily configured for floating or proportional control, direct or reverse action, stroke timing, and flow characteristics. An automatic input control signal setup allows for easy field installation onto existing Schneider Electric globe valves. The Forta actuator can also be purchased as part of a complete valve assembly for new applications\/installations (order the VU Series).<\/p>\n\n- Floating or proportional control in the same actuator<\/li>\n
- Proportional configuration 0-10, 2-10 VDC or 4-20 mA, 500 Ohm resistor included<\/li>\n
- Direct\/Reverse action (switch selectable)<\/li>\n
- Configurable run time<\/li>\n
- Manual override<\/li>\n
- Electronic valve sequencing and flow characteristic (equal percentage or linear) selection<\/li>\n
- Torque overload protection (full stroke)<\/li>\n
- Easy auto zero and span<\/li>\n<\/ul>\n
And for the valve, they recommended the Schneider VB-7323-0-4-06 as the \u00be inch 3-way diverting valve. The same part that he was looking to replace! (It doesn\u2019t happen often, but every once in a while, we make magic happen!) We happened to have the same discontinued valve still in stock and were able to do a direct replacement for the most cost-effective solution overall.<\/p>\n
[\/et_pb_toggle][et_pb_text admin_label=”Gas & Specialty Sensors” _builder_version=”4.27.5″ _module_preset=”default” custom_padding=”0px|0px|0px|0px|false|false” border_width_bottom=”1px” global_colors_info=”{}”]<\/p>\n
Gas & Specialty Sensors<\/h2>\n
[\/et_pb_text][et_pb_toggle title=”Q: We\u2019re starting to use A2L refrigerant and want to make sure we can detect leaks quickly. I understand that A2L refrigerants are mildly flammable compared to other refrigerants. Does Kele carry any products that detect A2L refrigerants?” open_toggle_background_color=”#FFFFFF” closed_toggle_background_color=”#efefef” admin_label=”Q: We\u2019re starting to use A2L refrigerant and want to make sure we can detect leaks quickly. I understand that A2L refrigerants are mildly flammable compared to other refrigerants. Does Kele carry any products that detect A2L refrigerants?” _builder_version=”4.27.5″ _module_preset=”default” title_font=”|700|||||||” title_font_size=”14px” global_colors_info=”{}”]<\/p>\n
Kele does sell products that detect A2L refrigerants. When selecting a gas detector, the specific refrigerant must be identified because most detectors are calibrated for individual gases or refrigerant families.<\/p>\n
These are some A2L-compatible refrigerant gas detection products available from Kele:<\/p>\n
\n- Macurco RD-VRF Series<\/strong><\/a><\/li>\n
- Bacharach MGS-450 Series<\/strong><\/a><\/li>\n
- Bacharach 6203 Series<\/strong><\/a><\/li>\n<\/ul>\n
What are A2L refrigerants?<\/u><\/strong><\/p>\nA2L refrigerants<\/strong>\u00a0are a newer class of refrigerants developed to meet environmental regulations by significantly reducing global warming potential (GWP).<\/p>\nBecause A2L refrigerants are mildly flammable, building and mechanical codes often require safeguards such as refrigerant leak detection systems, ventilation, and charge-limit compliance.<\/p>\n
A2L refrigerants are becoming the standard replacement for many traditional HFCs in commercial HVAC systems due to their\u00a0lower environmental impact and improved energy efficiency<\/strong>.<\/p>\n[\/et_pb_toggle][et_pb_toggle title=”Q: I need parts for a project that has two mechanical rooms, each with one chiller, and I need a refrigerant monitor in each room with two remote detectors at the chillers, plus horns and strobes for alarming. Can you help?” open_toggle_background_color=”#FFFFFF” closed_toggle_background_color=”#efefef” admin_label=”Q: I need parts for a project that has two mechanical rooms, each with one chiller, and I need a refrigerant monitor in each room with two remote detectors at the chillers, plus horns and strobes for alarming. Can you help?” _builder_version=”4.27.5″ _module_preset=”default” title_font=”|700|||||||” title_font_size=”14px” global_colors_info=”{}”]<\/p>\n
For this setup, our technician recommended using a\u00a0Honeywell Controller<\/strong><\/a>\u00a0with remote refrigerant sensors for each mechanical room. The\u00a0301EM<\/strong>\u00a0includes\u00a0four DPDT relays (5 A @ up to 250 V)<\/strong>\u00a0you can use to shut down chillers and start ventilation on alarm.<\/p>\nHe went on to say you can order the version without the integral horn\/strobe, if the project plan is to use a remotely mounted notification device at the room entrance to meet code (rather than an on-panel strobe).<\/p>\n
The customer would then pair each controller with\u00a0two<\/strong>\u00a0refrigerant sensors for the chillers, for a total of\u00a0four<\/strong>\u00a0sensors specified as\u00a0S301-IRF-R514A-K<\/strong><\/a>\u00a0(these are gas-specific, so confirm the refrigerant is\u00a0R514A<\/strong>\u00a0before ordering).<\/p>\nThe tech went on to say that a remote display panel, such as the\u00a0301EMRP-K<\/strong><\/a>,<\/strong>\u00a0is\u00a0optional<\/strong>\u00a0and only required if you want a second readout outside the room.<\/p>\n[\/et_pb_toggle][et_pb_toggle title=”Q: I\u2019m having some issues with the AVS-200 air velocity sensors we purchased. Can you help?” open_toggle_background_color=”#FFFFFF” closed_toggle_background_color=”#efefef” admin_label=”Q: I\u2019m having some issues with the AVS-200 air velocity sensors we purchased. Can you help?” _builder_version=”4.27.5″ _module_preset=”default” title_font=”|700|||||||” title_font_size=”14px” global_colors_info=”{}”]<\/p>\n
This customer was using a 125V incoming power source that stepped down to 24V. However, the actual output was 28V AC. Because of this higher voltage, it caused one of the three sensors to fail as they are rated for a maximum of 27V AC.<\/p>\n
So, did the Kele tech team help source a solution?<\/p>\n
Of course! Our tech team confirmed that these sensors do in fact accept both AC and DC power (despite some documentation showing only AC). Our tech team then suggested using a DC power supply as the most effective solution as DC power supplies are regulated, thus maintaining a consistent output voltage regardless of input fluctuations. An isolation transformer, while potentially useful for other applications, would not solve for the voltage regulation issue with AC power in this scenario.<\/p>\n
Two options were suggested for specific DC product recommendations:<\/p>\n
\n- DCP-1.5-W<\/a>\n
\n- Low cost<\/li>\n
- Regulated DC output<\/li>\n
- Snap-track mounted<\/li>\n
- Screw terminals with pressure plates<\/li>\n
- Adjustable DC output<\/li>\n
- Full-wave rectified<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n
The Kele DCP-1.5-W is a regulated 1.5A power supply that accepts 24 VAC at the input and provides 24 VDC at the output. The DCP-1.5-W can be ordered with any output voltage from 1.5V to 27 VDC. Field voltage adjustments may also be made using only a screwdriver. The power supply is provided with a mounting track for easy field application. This low-cost power supply features good regulation and has full overcurrent protection.<\/p>\n
\n- PSP-24DA<\/a>\n
\n- One or two transformers in a re-packaged metal enclosure<\/li>\n
- 40, 75, and 100 VA Class 2 transformers<\/li>\n
- Output switch\/circuit breaker and LED indication<\/li>\n
- Optional primary switch\/circuit breaker<\/li>\n
- Optional 120 VAC convenience outlets<\/li>\n
- To order UL508 add 1C to the end<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n
The PSH Series Functional Devices enclosed 24 VAC Class 2 power source includes one or two transformers, pre-packaged in a metal enclosure. These are engineered for use in temperature control systems, industrial applications, and building automation systems. The transformers are available in 40VA, 75VA and 100VA sizes. A switch and circuit breaker are provided for switching the output of each transformer. An optional switch and circuit breaker are available for controlling power to the entire unit. Other handy features include an LED to indicate the presence of 24-volt AC at the Class 2 output terminals or wires, an internal high-voltage wiring compartment, and two optional 120-volt AC grounded convenience outlets.<\/p>\n
[\/et_pb_toggle][et_pb_text admin_label=”Leak” _builder_version=”4.27.5″ _module_preset=”default” custom_padding=”0px|0px|0px|0px|false|false” border_width_bottom=”1px” global_colors_info=”{}”]<\/p>\n
Leak<\/h2>\n
[\/et_pb_text][et_pb_toggle title=”Q: I am looking for a refrigerant leak detector for R32 that is going to be housed in a refrigerant shaft within a building. When it reaches a certain leakage amount, I need it to turn on an exhaust fan or be a relay to do that and then also generate an alarm somehow. Do you have a product you could recommend or an application that can help me out?” open_toggle_background_color=”#FFFFFF” closed_toggle_background_color=”#efefef” admin_label=”Q: I am looking for a refrigerant leak detector for R32 that is going to be housed in a refrigerant shaft within a building. When it reaches a certain leakage amount, I need it to turn on an exhaust fan or be a relay to do that and then also generate an alarm somehow. Do you have a product you could recommend or an application that can help me out?” _builder_version=”4.27.5″ _module_preset=”default” title_font=”|700|||||||” title_font_size=”14px” body_font_size=”12px” global_colors_info=”{}”]<\/p>\n
\u00a0There were a few parameters that we needed to keep in mind:<\/p>\n
Refrigerant transition for HVAC is required according to the EPA\u2019s authorization of the American Innovation and Manufacturing Act
The Industry for Comfort, Heating, and Cooling has largely identified R454B and R32 as replacement refrigerants for R410A
Part of the code requirement in the IMC for these new A2L refrigerants is that anytime you penetrate two or more floors, the refrigerant pipes must be located in a refrigerant shaft. (See full code 1109.2.5 here).<\/p>\n
The customer was going to need a total of 20-25.<\/p>\n
Our techs had their recommendation already in hand by the time the call ended! They recommended the Bacharach MGS-450 Series, specifically the 6302-1155, as the refrigerant that would work best for the customer\u2019s situation.<\/p>\n
The Bacharach MGS-450 Series is a feature-rich refrigerant, toxic, and combustible gas detector with a remote sensor (up to 16 ft. or 5 m). The MGS-450 Series can be connected to a building management system using Modbus, MGS-408 Series gas detection controllers, or as a standalone gas detector for low-temperature, IP66 applications. In addition, the MGS-450 Series includes 3-output relays (fault, low alarm, high alarm) and an analog output for local alarming, auxiliary ventilation, or refrigerant flow restriction. The MGS-450 Series is ideal for all AHSRAE 15 or EN378 safety compliance applications, including cold storage, freezers, coolers, or mechanical room applications.<\/p>\n
[\/et_pb_toggle][et_pb_toggle title=”Q: We\u2019ve got a Kele WD-2T Water Detector installed in a storage room next to some MRI equipment, and we\u2019re getting frequent false alarms. Can you help me troubleshoot?” open_toggle_background_color=”#FFFFFF” closed_toggle_background_color=”#efefef” admin_label=”Q: We\u2019ve got a Kele WD-2T Water Detector installed in a storage room next to some MRI equipment, and we\u2019re getting frequent false alarms. Can you help me troubleshoot?” _builder_version=”4.27.5″ _module_preset=”default” title_font=”|700|||||||” title_font_size=”14px” body_font_size=”12px” global_colors_info=”{}”]<\/p>\n
A customer called in about excessive false alarms they were getting from a Kele WD-2T Water Detector. He went on to explain that the location of this part had become a high-traffic area: rolling chairs, cardboard boxes, and other storage items are constantly being moved over the sensors, causing approximately 80 alarms without any actual water leaks. The customer was wanting to know if the sensors were designed to withstand such foot traffic and debris or if they needed to be protected.<\/p>\n
Our Kele technician clarified that the sensors are meant for very light traffic, such as in server rooms or underfloor scenarios. He explained that the tape contains two conductors, and if they are damaged or bunched up due to heavy traffic, it can cause false alarms. He suggested the alarms were likely due to damaged tape or conductive materials (like drywall goop or metal objects such as a fire extinguisher) lying across the sensors, creating continuity between the probes.<\/p>\n
Our tech advised that the tape should have a resistance of 68,000 ohms when intact. He confirmed that the sensors can be cleaned with water and a light brush, or even a push broom, as they are resilient unless physically damaged. He also mentioned that replacement tape for the unit is also available at Kele. The customer planned to clean the sensors and recheck the resistance.<\/p>\n
[\/et_pb_toggle][et_pb_toggle title=”Q: I\u2019m looking for leak detector that is FM approved. Does Kele carry one?” open_toggle_background_color=”#FFFFFF” closed_toggle_background_color=”#efefef” admin_label=”Q: I\u2019m looking for leak detector that is FM approved. Does Kele carry one?” _builder_version=”4.27.5″ _module_preset=”default” title_font=”|700|||||||” title_font_size=”14px” body_font_size=”12px” global_colors_info=”{}”]<\/p>\n
We do. We\u2019ve recently added two TTK brand leak detectors to our offering that the supplier has assured us are FM (Factory Mutual) approved and hope to add more in the future. The two recommended are:<\/p>\n
\n- FG-NET<\/strong><\/a>system for water\/acid detection<\/li>\n
- FG-ALS4-OD<\/strong><\/a>system for hydrocarbons<\/li>\n<\/ul>\n
Note: Information above current as of 1\/21\/26.<\/em><\/p>\nMORE ON FM APPROVAL
<\/u><\/strong>FM Approvals is a globally recognized third-party certification program focused on\u00a0property loss prevention<\/strong>. Products that earn the\u00a0FM Approved<\/em>\u00a0mark have passed rigorous testing for performance and reliability under conditions that simulate real-world hazards, including leaks, fire, water damage, and other risks.<\/p>\nFor water leak detectors specifically (e.g., systems certified under FM Standard 7745), an FM mark indicates the system will effectively detect and report leaks in time to minimize damage.<\/p>\n
Unlike certifications that test individual components in ideal lab conditions, FM Approvals evaluates products and systems with emphasis on real-world performance and integration in building environments. This gives insurers confidence that the equipment will perform as intended on site, not just on paper.<\/p>\n
[\/et_pb_toggle][\/et_pb_column][et_pb_column type=”1_2″ _builder_version=”4.27.5″ _module_preset=”default” global_colors_info=”{}”][et_pb_text admin_label=”Motor Controls” _builder_version=”4.27.5″ _module_preset=”default” custom_padding=”0px|0px|0px|0px|false|false” border_width_bottom=”1px” global_colors_info=”{}”]<\/p>\n
Motor Controls<\/h2>\n
[\/et_pb_text][et_pb_toggle title=”Q: My building’s main supply air fan (connected to an AHU serving a large open office area) seems to be running at full speed constantly, even when the zone thermostats are satisfied, and the VFD display shows it’s commanding down. This is causing excessive noise, uncomfortable drafts, and our energy consumption for that AHU is through the roof. I suspect something is wrong with the fan control loop, but I’m not sure where to start.” open_toggle_background_color=”#FFFFFF” closed_toggle_background_color=”#efefef” admin_label=”Q: My building’s main supply air fan (connected to an AHU serving a large open office area) seems to be running at full speed constantly, even when the zone thermostats are satisfied, and the VFD display shows it’s commanding down. This is causing excessive noise, uncomfortable drafts, and our energy consumption for that AHU is through the roof. I suspect something is wrong with the fan control loop, but I’m not sure where to start.” _builder_version=”4.27.5″ _module_preset=”default” title_font=”|700|||||||” title_font_size=”14px” body_font_size=”12px” global_colors_info=”{}”]<\/p>\n
Well the Kele technical team asked the following questions to help troubleshoot for this customer who was out in the field and having issues.<\/p>\n
\n- What type of VFD is being used on the supply fan?<\/li>\n
- Where is the duct static pressure sensor located, and what is its current reading compared to setpoint?<\/li>\n
- Is the VFD receiving a proper control signal (e.g., 0-10VDC or 4-20mA) from the BAS\/controller?<\/li>\n
- Have you observed any physical issues with the fan or ductwork like a clogged filter or stuck damper?<\/li>\n<\/ul>\n
And just like that\u2014the customer discovered a control wire from the BAS controller to the VFD was damaged. Our tech team suggested that they replace the wire with a\u00a0UL-rated plenum cable and shielded control wire<\/a>.<\/p>\n[\/et_pb_toggle][et_pb_text admin_label=”Panel Fabrication” _builder_version=”4.27.5″ _module_preset=”default” custom_padding=”0px|0px|0px|0px|false|false” border_width_bottom=”1px” global_colors_info=”{}”]<\/p>\n
Panel Fabrication<\/h2>\n
[\/et_pb_text][et_pb_toggle title=”Q: I have some ABB contacts in hand, but I can\u2019t seem to get them to fit together or get them to work. What am I missing here?” open_toggle_background_color=”#FFFFFF” closed_toggle_background_color=”#efefef” admin_label=”Q: I have some ABB contacts in hand, but I can\u2019t seem to get them to fit together or get them to work. What am I missing here?” _builder_version=”4.27.5″ _module_preset=”default” title_font=”|700|||||||” title_font_size=”14px” global_colors_info=”{}”]<\/p>\n
This is a great question and one we get often for these particular pushbuttons<\/a> and contacts & holders<\/a>.<\/p>\nAs long as you have the three pieces required, a pushbutton or switch, a holder, and a contact, they will work fine together. The most common oversight is that the contacts must be mounted in an OUTSIDE slot on the MCBH holder.<\/strong> They will not be initiated from the middle position, which is where everyone wants to first put it.<\/p>\nHere is a visual example:<\/p>\n
<\/p>\n
![\"\"](\"\/\/assets.kele.com\/content\/wp-content\/uploads\/2026\/03\/Step1-rev.jpg\")
![\"\"](\"\/\/assets.kele.com\/content\/wp-content\/uploads\/2026\/03\/Step2-rev.jpg\")
![\"\"](\"\/\/assets.kele.com\/content\/wp-content\/uploads\/2026\/03\/Step3-rev.jpg\")
<\/p>\n
[\/et_pb_toggle][et_pb_text admin_label=”Power Monitoring” _builder_version=”4.27.5″ _module_preset=”default” custom_padding=”0px|0px|0px|0px|false|false” border_width_bottom=”1px” global_colors_info=”{}”]<\/p>\n
Power Monitoring<\/h2>\n
[\/et_pb_text][et_pb_toggle title=”Q: I think I found a replacement for power meter my customer wants to retire in his building. What I see on your site looks like it\u2019ll be an exact fit. What else do I need to consider other than that?” open_toggle_background_color=”#FFFFFF” closed_toggle_background_color=”#efefef” admin_label=”Q: I think I found a replacement for power meter my customer wants to retire in his building. What I see on your site looks like it\u2019ll be an exact fit. What else do I need to consider other than that?” _builder_version=”4.27.5″ _module_preset=”default” title_font=”|700|||||||” title_font_size=”14px” body_font_size=”12px” global_colors_info=”{}”]<\/p>\n
Once our tech team started digging, they found two BIG things that you always want to keep in mind if you ever find yourself in the same situation.<\/p>\n
\n- Protocol: The power meter that their customer wanted to replace was at the time running a proprietary protocol. The replacement they had found was from a different manufacturer and therefore that was an issue that needed to be brought up.<\/li>\n
- CT Input: At the end of the day\u2014the biggest concern what the CT input was on the current component. We wanted to make sure that the input was the same for the new part from Dent Instruments. If the CT input hadn\u2019t been the same, then the customer would\u2019ve been replacing everything all over again. We had to make sure that the CT inputs stayed the same\u2014otherwise, we would\u2019ve had one irritated customer on our hands!<\/li>\n<\/ol>\n
We verified all of the information and had the customer find out what the CT input was. After everything was all said and done, we were able to confirm that the power meter from Dent Instruments was indeed the right choice on the part of the customer and that it would work for what he wanted to do.<\/p>\n
The DENT Instruments PowerScout 3037 comes in four basic configurations depending on whether a display or Ethernet port are desired. Instead of having one specific meter for a single job, the PowerScout 3037 can adapt to nearly any project requirement. All PowerScout 3037 models have a broadband power supply (80-600VAC) and can be paired with a variety of current transformers, from split cores that measure less than 1A up to large RoCoils designed for measuring 4000A. In addition, communication protocols are field-selectable. Easily toggle between Modbus or BACnet using ViewPoint software. Send kWh or other pulses to an external device. The pulse output is used to generate system kWh pulses for devices, such as data loggers, that can accept pulses, but do not have BACnet or Modbus capability. The PowerScout series networked power meters are designed to provide timely and accurate consumption data to gain the upper hand on electrical costs in today\u2019s escalating energy market. PowerScout meters can capture kWh\/kW energy and demand data as well as virtually all relevant energy parameters for diagnostics and monitoring on three-phase or single-phase circuit installations. The PowerScout\u2019s flexibility, size, and ease of use make them ideal tools for gathering detailed consumption data in commercial, industrial, government and retail environments. Kele is the leading supplier of building automation products. When you need the right product, right now, count on Kele.<\/p>\n
When you\u2019re working on a building and dealing with obsolete parts (or anything else for that matter) the Kele Tech Team is here to help cover all the bases. So whether you\u2019re out in the field needing help\u2014or trying your darndest to just get the right part in so you can get back in the field\u2014the Kele Team is here to make it easy. Call us today or chat with online to help find the custom solution you\u2019re looking for.<\/p>\n
Here\u2019s the link to the part:\u00a0https:\/\/www.kele.com\/product\/power-monitoring-and-protection\/power-meters\/dent-instruments\/ps3hd-c-d-n<\/a><\/p>\n[\/et_pb_toggle][et_pb_text admin_label=”Power Supplies” _builder_version=”4.27.5″ _module_preset=”default” custom_padding=”0px|0px|0px|0px|false|false” border_width_bottom=”1px” global_colors_info=”{}”]<\/p>\n
Power Supplies<\/h2>\n
[\/et_pb_text][et_pb_toggle title=”Q: I\u2019m having some issues with the AVS-200 air velocity sensors we purchased. Can you help?” open_toggle_background_color=”#FFFFFF” closed_toggle_background_color=”#efefef” admin_label=”Q: I\u2019m having some issues with the AVS-200 air velocity sensors we purchased. Can you help?” _builder_version=”4.27.5″ _module_preset=”default” title_font=”|700|||||||” title_font_size=”14px” body_font_size=”12px” global_colors_info=”{}”]<\/p>\n
This customer was using a 125V incoming power source that stepped down to 24V. However, the actual output was 28V AC. Because of this higher voltage, it caused one of the three sensors to fail as they are rated for a maximum of 27V AC.<\/p>\n
So, did the Kele tech team help source a solution?<\/p>\n
Of course! Our tech team confirmed that these sensors do in fact accept both AC and DC power (despite some documentation showing only AC). Our tech team then suggested using a DC power supply as the most effective solution as DC power supplies are regulated, thus maintaining a consistent output voltage regardless of input fluctuations. An isolation transformer, while potentially useful for other applications, would not solve for the voltage regulation issue with AC power in this scenario.<\/p>\n
Two options were suggested for specific DC product recommendations:<\/p>\n
\n- DCP-1.5-W<\/a>\n
\n- Low cost<\/li>\n
- Regulated DC output<\/li>\n
- Snap-track mounted<\/li>\n
- Screw terminals with pressure plates<\/li>\n
- Adjustable DC output<\/li>\n
- Full-wave rectified<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n
The Kele DCP-1.5-W is a regulated 1.5A power supply that accepts 24 VAC at the input and provides 24 VDC at the output. The DCP-1.5-W can be ordered with any output voltage from 1.5V to 27 VDC. Field voltage adjustments may also be made using only a screwdriver. The power supply is provided with a mounting track for easy field application. This low-cost power supply features good regulation and has full overcurrent protection.<\/p>\n
\n- PSP-24DA<\/a>\n
\n- One or two transformers in a re-packaged metal enclosure<\/li>\n
- 40, 75, and 100 VA Class 2 transformers<\/li>\n
- Output switch\/circuit breaker and LED indication<\/li>\n
- Optional primary switch\/circuit breaker<\/li>\n
- Optional 120 VAC convenience outlets<\/li>\n
- To order UL508 add 1C to the end<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n
The PSH Series Functional Devices enclosed 24 VAC Class 2 power source includes one or two transformers, pre-packaged in a metal enclosure. These are engineered for use in temperature control systems, industrial applications, and building automation systems. The transformers are available in 40VA, 75VA and 100VA sizes. A switch and circuit breaker are provided for switching the output of each transformer. An optional switch and circuit breaker are available for controlling power to the entire unit. Other handy features include an LED to indicate the presence of 24-volt AC at the Class 2 output terminals or wires, an internal high-voltage wiring compartment, and two optional 120-volt AC grounded convenience outlets.<\/p>\n
[\/et_pb_toggle][et_pb_text admin_label=”Pressure Components” _builder_version=”4.27.5″ _module_preset=”default” custom_padding=”0px|0px|0px|0px|false|false” border_width_bottom=”1px” global_colors_info=”{}”]<\/p>\n
Pressure Components<\/h2>\n
[\/et_pb_text][et_pb_toggle title=”Q: Does this specific Belimo part have an electrical connection and plug? Some parts make you buy other parts, and I need to know if this is going to be one of them.” open_toggle_background_color=”#FFFFFF” closed_toggle_background_color=”#efefef” admin_label=”Q: Does this specific Belimo part have an electrical connection and plug? Some parts make you buy other parts, and I need to know if this is going to be one of them.” _builder_version=”4.27.5″ _module_preset=”default” title_font=”|700|||||||” title_font_size=”14px” global_colors_info=”{}”]<\/p>\n
<\/p>\n
![\"\"](\"\/\/assets.kele.com\/content\/wp-content\/uploads\/2024\/10\/ftf-part1.jpg\")
![\"\"](\"\/\/assets.kele.com\/content\/wp-content\/uploads\/2024\/10\/ftf-part2.jpg\")
There were a few parameters that we needed to keep in mind:<\/p>\n
\n- The customer is looking for a plug that gives flying leads so that he can land his wire to it.<\/li>\n
- The facility is a chicken farm with a large number of chickens. The pressure transmitters give them water every day, so they HAVE to run smoothly and operate without issue.<\/li>\n
- The customer is concerned about cost and prefers a simpler solution over an I\/O controller and additional sensors.<\/li>\n<\/ul>\n
So, was the Kele tech team able to address this customer\u2019s concerns?<\/p>\n
Our techs were able to verify the parts information on the call and then pulled the part off the shelf to double-confirm and double-verify with the customer that they knew their stuff. The\u00a0Belimo 22WP Pressure Sensor (Liquid)<\/a>\u00a0was indeed the perfect part for the job and had what the customer wanted.<\/p>\nBelimo\u2019s 22WP Pressure Sensor (Liquid) Series comes with an active sensor (0-10 V or 4-20 mA) for measuring the pressure in liquid mediums for air conditioning, heating, and water applications. Suitable for plants with refrigerant. NEMA 4 \/ IP65 rated enclosure.<\/p>\n
Product Series Features<\/strong><\/p>\n\n- Active sensor for pressure in liquid mediums for air conditioning, heating, and water applications.<\/li>\n
- NEMA 4 \/ IP65 enclosure<\/li>\n<\/ul>\n
[\/et_pb_toggle][et_pb_text admin_label=”Temp Sensors & Transmitters” _builder_version=”4.27.5″ _module_preset=”default” custom_padding=”0px|0px|0px|0px|false|false” border_width_bottom=”1px” global_colors_info=”{}”]<\/p>\n
Temp Sensors & Transmitters<\/h2>\n
[\/et_pb_text][et_pb_toggle title=”Q: At my facility, we are required to wash our dry ice containers with hot water at a certain temperature. I’m looking for some kind of temperature sensor that I can submerse and install in a line in one of our pipes. I just need some help to find the right part and components. Can you help me out?” open_toggle_background_color=”#FFFFFF” closed_toggle_background_color=”#efefef” admin_label=”Q: At my facility, we are required to wash our dry ice containers with hot water at a certain temperature. I’m looking for some kind of temperature sensor that I can submerse and install in a line in one of our pipes. I just need some help to find the right part and components. Can you help me out?” _builder_version=”4.27.5″ _module_preset=”default” title_font=”|700|||||||” title_font_size=”14px” body_font_size=”12px” global_colors_info=”{}”]<\/p>\n
Here were a few parameters that we needed to keep in mind:<\/p>\n
\n- This part had to be fully submersible.<\/li>\n
- All temp. sensors are meant to communicate with some other piece of equipment, so we needed to make sure everything was compatible.<\/li>\n
- All the customer wanted was something that read the temperature of the water and then turned the data into a digital reading. No alarms or notifications are needed!<\/li>\n
- It needed to have an NIST certification.<\/li>\n
- For everything to work the way the customer wanted, he was going to need the temperature sensor, a transmitter, and a display. (And a brass well and a DC power supply!)<\/li>\n<\/ul>\n
So what did the Kele Tech Team find for a solution?<\/p>\n
After everything was all said and done and our techs did their due diligence and investigated some data sheets, the\u00a0ST-W91E-XW Immersion Temperature Sensor<\/a>\u00a0turned out to be the perfect solution!<\/p>\nThe Precon Model ST-W Immersion Sensor from PreCon provides precise remote temperature sensing for Building Automation Systems, BAS, and mechanical equipment room instrumentation. The active sensing element is a highly stable precision thermistor material or platinum RTD. The sensing element is sealed with a temperature conductive compound in a 4-7\/8 in (12.4 cm) stainless steel tube and brass fitting. A brass thermowell is the standard well provided with each sensor. A Greenfield connector is factory installed for flexible connection. The probe assembly on these immersion sensors are removable for replacement without the draining system.<\/p>\n
Our tech team also recommended the necessary parts needed for the entire process to work smoothly each and every time. Those parts were the:<\/p>\n
\n- WEL-B<\/a>(brass well for above)<\/li>\n
- LPI-1C-E<\/a>(display)<\/li>\n
- T91U-2<\/a>(transmitter)<\/li>\n
- DCP-250-P<\/a>(DC power supply, 120VAC input)<\/li>\n<\/ul>\n
[\/et_pb_toggle][et_pb_text admin_label=”Thermostats & Controllers” _builder_version=”4.27.5″ _module_preset=”default” custom_padding=”0px|0px|0px|0px|false|false” border_width_bottom=”1px” global_colors_info=”{}”]<\/p>\n
Thermostats & Controllers<\/h2>\n
[\/et_pb_text][et_pb_toggle title=”Q: I don\u2019t want to under-spec or over-spec this thermostat and end up with pricing issues. What information should I gather before requesting a quote?” open_toggle_background_color=”#FFFFFF” closed_toggle_background_color=”#efefef” admin_label=”Q: I don\u2019t want to under-spec or over-spec this thermostat and end up with pricing issues. What information should I gather before requesting a quote?” _builder_version=”4.27.5″ _module_preset=”default” title_font=”|700|||||||” title_font_size=”14px” body_font_size=”12px” global_colors_info=”{}”]<\/p>\n
Great question! Providing these details upfront ensures accurate pricing and the correct thermostat for your application. To quote the correct thermostat quickly and accurately, we\u2019ve listed out the questions our techs will ask when you call.<\/p>\n
There are a lot of options, and while base pricing between sensor types doesn\u2019t vary much, added features (display, humidity, override, specific setpoint ranges) can affect cost and compatibility.<\/p>\n
If you can provide these details, we can turn your quote around quickly and make sure you get exactly what your application requires.<\/p>\n
Download a checklist of these questions here.<\/strong><\/a><\/p>\n At minimum, the sensor will measure temperature. The most common types are:<\/p>\n Check your controller specs to confirm which one is required.<\/p>\n Many customers want occupants to adjust the temperature slightly.<\/p>\n This is important \u2014 if the sensor\u2019s output doesn\u2019t match what the controller expects, the space won\u2019t adjust properly.<\/p>\n This allows someone to temporarily switch from unoccupied to occupied mode (for nights or weekends).<\/p>\n [\/et_pb_toggle][\/et_pb_column][\/et_pb_row][et_pb_row column_structure=”1_2,1_2″ _builder_version=”4.27.5″ _module_preset=”default” global_colors_info=”{}”][et_pb_column type=”1_2″ _builder_version=”4.27.5″ _module_preset=”default” global_colors_info=”{}”][et_pb_text admin_label=”Actuators & Dampers” _builder_version=”4.27.5″ _module_preset=”default” custom_padding=”0px|0px|0px|0px|false|false” border_width_bottom=”1px” global_colors_info=”{}”]<\/p>\n [\/et_pb_text][et_pb_toggle title=”Q: What in the world do all these numbers and letters mean in relation to Belimo valves and actuators?” open_toggle_background_color=”#FFFFFF” closed_toggle_background_color=”#efefef” admin_label=”Q: What in the world do all these numbers and letters mean in relation to Belimo valves and actuators?” _builder_version=”4.27.5″ _module_preset=”default” title_font=”|700|||||||” title_font_size=”14px” body_font_size=”12px” global_colors_info=”{}”]<\/p>\n We\u2019ve all been there\u2014no seriously! You\u2019re new to the industry and no one told you that you now need to learn a whole new language just to order parts. And help seems unattainable. Or at least it did for a recent customer. But Kele\u2019s tech team hopped on a call and broke down the lingo\u2014which made us think \u2026<\/p>\n How many other industry rookies need a play-by-play to learn the language???<\/p>\n We\u2019re guessing a few\u2014so without further ado \u2026<\/p>\n Decoding the Valve Part Number\u00a0<\/strong>B313B<\/strong><\/a>:<\/strong><\/p>\n Understanding the Actuator Part Number\u00a0<\/strong>TR24-3-300US<\/strong><\/a>:<\/strong><\/p>\n We hope this helps! And take it a step further\u2014here\u2019s some best practices to follow when ordering:<\/p>\n [\/et_pb_toggle][et_pb_toggle title=”Q: How can I replace my failing actuator on my basement heat pump system with a more reliable and cost-effective solution?” open_toggle_background_color=”#FFFFFF” closed_toggle_background_color=”#efefef” admin_label=”Q: What in the world do all these numbers and letters mean in relation to Belimo valves and actuators?” _builder_version=”4.27.5″ _module_preset=”default” title_font=”|700|||||||” title_font_size=”14px” global_colors_info=”{}”]<\/p>\n There were a few parameters that we needed to keep in mind:<\/p>\n So, was the Kele tech team able to address the concerns of this customer?<\/p>\n Of course! They recommended the Belimo B2 Series 2-way and B3 Series 3-way ball valves and the Honeywell T775 Series single- or multi-loop standalone controller.<\/p>\n The Belimo B2 Series 2-way and B3 Series 3-way ball valves are used for two-position, floating or proportional control of HVAC hot or chilled water. The valves come assembled with direct coupled Belimo electric actuators with spring return or non-spring return operation.<\/p>\n Features<\/p>\n The Honeywell Model T775 is a standalone multi-point and multi-loop controller designed for a wide range of applications. The I\/O point mix is unit-specific with temperature, humidity, and pressure input models available. Relay or analog output models may be selected as well. Single-loop, two-loop and reset controllers may be selected, all including a seven-day time clock for output disable or night setback. The relay output controllers have adjustable differential control algorithms. Analog output controllers have adjustable throttling range, proportional plus integral (PI), or proportional, integral, and derivative (PID) control. The backlit display is easy to read, and the menu-driven setup is simple. The T775 is available in NEMA 1 or NEMA 4X enclosures for the most demanding environments.<\/p>\n Features<\/p>\n [\/et_pb_toggle][et_pb_text admin_label=”Alarms & Indication” _builder_version=”4.27.5″ _module_preset=”default” custom_padding=”0px|0px|0px|0px|false|false” border_width_bottom=”1px” global_colors_info=”{}”]<\/p>\n [\/et_pb_text][et_pb_toggle title=”Q: I received a push-pull E-Stop N4X SS surface switches. While the switch is labeled correctly, it doesn\u2019t appear to be a push-button, pull-reset device. Instead, the button feels like a momentary, spring-return push button. Is this the correct switch?” open_toggle_background_color=”#FFFFFF” closed_toggle_background_color=”#efefef” admin_label=”Q: I received a push-pull E-Stop N4X SS surface switches. While the switch is labeled correctly, it doesn\u2019t appear to be a push-button, pull-reset device. Instead, the button feels like a momentary, spring-return push button. Is this the correct switch?” _builder_version=”4.27.5″ _module_preset=”default” title_font=”|700|||||||” title_font_size=”14px” body_font_size=”12px” global_colors_info=”{}”]<\/p>\n Yes\u2014this is the correct switch. The push button on the ESM series (any model with PPO<\/strong> in the description) can be misleading at first glance. When shipped, the E-stop arrives in the reset<\/strong> position, which makes it feel like a momentary button.<\/p>\n To engage it as a maintained E-stop, you need to pull the button out firmly<\/strong>. Once pulled far enough, a green stripe becomes visible<\/strong>, indicating that the contacts are engaged and the switch is in the maintained (pushed) position.<\/p>\n Bottom line: although it feels momentary at first, it is functioning exactly as designed once fully pulled out.<\/p>\n [\/et_pb_toggle][et_pb_text admin_label=”Control Valves” _builder_version=”4.27.5″ _module_preset=”default” custom_padding=”0px|0px|0px|0px|false|false” border_width_bottom=”1px” global_colors_info=”{}”]<\/p>\n [\/et_pb_text][et_pb_toggle title=”Q: How can I effectively monitor and control a fan in a server closet using a BACnet system?” open_toggle_background_color=”#FFFFFF” closed_toggle_background_color=”#efefef” admin_label=”Q: How can I effectively monitor and control a fan in a server closet using a BACnet system?” _builder_version=”4.27.5″ _module_preset=”default” title_font=”|700|||||||” title_font_size=”14px” body_font_size=”12px” global_colors_info=”{}”]<\/p>\n There were a few parameters that we needed to keep in mind:<\/p>\n So, what did the Kele Tech Team find for a solution?<\/p>\n Our techs had their recommendation already in hand by the time the call ended! They recommended the\u00a0Viconics Staged BACnet Thermostat with Humidity<\/a>, specifically the\u00a0VT8650U5000B<\/a>.<\/p>\n The VT8650 room controllers are both application-specific and programmable. This enables the modification of pre-configured control sequences or scripting to modify existing behavior. The VT8650 room controllers provide exception control of staged heating and cooling equipment such as packaged roof-top units. Their configurable control sequences, economizer, and scheduler functionalities deliver all the flexibility necessary for optimal indoor air quality applications.<\/p>\n Product Series Features<\/strong><\/p>\n [\/et_pb_toggle][et_pb_toggle title=”Q: Can I pair a B238 valve with an AFRB24 actuator, and how do I make sure it\u2019s set up as fail close (normally closed)?” open_toggle_background_color=”#FFFFFF” closed_toggle_background_color=”#efefef” admin_label=”Q: Can I pair a B238 valve with an AFRB24 actuator, and how do I make sure it\u2019s set up as fail close (normally closed)?” _builder_version=”4.27.5″ _module_preset=”default” title_font=”|700|||||||” title_font_size=”14px” body_font_size=”12px” global_colors_info=”{}”]<\/p>\n Yes, you can pair the\u00a0B238 valve<\/a>\u00a0with the\u00a0AFRB24 actuator<\/a>, and the configuration\u2014whether it is fail close (normally closed) or fail open (normally open)\u2014depends on how the valve is mounted to the actuator. The actuator itself can operate either way; it\u2019s simply a matter of valve orientation. If the unit is assembled in the field and the direction is incorrect, it can easily be flipped to change from normally open to normally closed, or vice versa.<\/p>\n When ordered through us, we can set up and ship the valve and actuator already configured as normally closed by specifying B238 + AFRB24-NC on the order. This ensures the assembly arrives ready to install and operate as intended, without the customer needing to make any adjustments.<\/p>\n In this case, our team confirmed the correct configuration with the customer, explained how the fail-close setup works, and arranged to have the B238 valve and AFRB24 actuator assembled in-house as a normally closed unit before shipment, providing a complete, ready-to-install solution.<\/p>\n [\/et_pb_toggle][et_pb_toggle title=”Q: Can I replace my old pneumatic actuator with an electric one without having to change out the entire valve?” open_toggle_background_color=”#FFFFFF” closed_toggle_background_color=”#efefef” admin_label=”Q: Can I replace my old pneumatic actuator with an electric one without having to change out the entire valve?” _builder_version=”4.27.5″ _module_preset=”default” title_font=”|700|||||||” title_font_size=”14px” body_font_size=”12px” global_colors_info=”{}”]<\/p>\n The answer is \u2026 Yes!<\/p>\n In this case, the customer had several small 3-way hot water valves with pneumatic actuators that were being controlled by old thermostats. The goal was to start modernizing the system by switching to electric actuators that could take a 0\u201310V signal from new Johnson Controls wall thermostats and eventually be tied into a building automation system. Because the valve bodies themselves were still in good condition, replacing the actuators was the most efficient way to begin the upgrade without incurring the higher cost of full valve replacements.<\/p>\n Our technician explained that a\u00a0Johnson Controls VA-7152-1001 actuator<\/strong><\/a>\u00a0would mount directly to the existing half-inch valve without additional hardware. These actuators are compatible with 24V, 0\u201310V control signals and are also in stock, making them a convenient and economical retrofit choice.<\/p>\n The customer then asked for a fail-safe option as well so the building owner could decide which approach worked best. For that, the technician suggested a Belimo model.\u00a0Belimo UGVL actuators<\/strong><\/a>\u00a0allow the fail position to be adjusted in the field and are known for their long-term reliability, making them a strong option for customers planning a more long-term upgrade path.<\/p>\n In the end, the customer was able to take back multiple choices \u2014economical retrofit and an upgrade with added flexibility and longevity \u2014 leaving the final decision to the building owner.<\/p>\n [\/et_pb_toggle][et_pb_toggle title=”Q: I need to replace an old and discontinued Schneider valve and Belimo actuator that were working together. Can you help?” open_toggle_background_color=”#FFFFFF” closed_toggle_background_color=”#efefef” admin_label=”Q: I need to replace an old and discontinued Schneider valve and Belimo actuator that were working together. Can you help?” _builder_version=”4.27.5″ _module_preset=”default” title_font=”|700|||||||” title_font_size=”14px” body_font_size=”12px” global_colors_info=”{}”]<\/p>\n Nothing is worse than realizing the part you need to replace has been discontinued. It\u2019s a pain if you don\u2019t have someone to help you sort through all the possible parts that might work as a replacement.<\/p>\n Recently, a customer had this exact problem. The Kele tech team rallied for the challenge and got everything squared away. Here are some things they had to keep in mind before they started making product recommendations:<\/p>\n So, what did our tech team recommend?<\/p>\n They found a cost-effective alternative to the discontinued actuator in the\u00a0Schnieder actuator M400A-VB<\/a>\u00a0that would mount directly to a valve. The Schneider Electric Forta Series globe valve actuator is a programmable linear actuator family for use with VB7000, VB8000, and VB9000 series two- and three-way valves. The actuators are easily configured for floating or proportional control, direct or reverse action, stroke timing, and flow characteristics. An automatic input control signal setup allows for easy field installation onto existing Schneider Electric globe valves. The Forta actuator can also be purchased as part of a complete valve assembly for new applications\/installations (order the VU Series).<\/p>\n And for the valve, they recommended the Schneider VB-7323-0-4-06 as the \u00be inch 3-way diverting valve. The same part that he was looking to replace! (It doesn\u2019t happen often, but every once in a while, we make magic happen!) We happened to have the same discontinued valve still in stock and were able to do a direct replacement for the most cost-effective solution overall.<\/p>\n [\/et_pb_toggle][et_pb_text admin_label=”Gas & Specialty Sensors” _builder_version=”4.27.5″ _module_preset=”default” custom_padding=”0px|0px|0px|0px|false|false” border_width_bottom=”1px” global_colors_info=”{}”]<\/p>\n [\/et_pb_text][et_pb_toggle title=”Q: We\u2019re starting to use A2L refrigerant and want to make sure we can detect leaks quickly. I understand that A2L refrigerants are mildly flammable compared to other refrigerants. Does Kele carry any products that detect A2L refrigerants?” open_toggle_background_color=”#FFFFFF” closed_toggle_background_color=”#efefef” admin_label=”Q: We\u2019re starting to use A2L refrigerant and want to make sure we can detect leaks quickly. I understand that A2L refrigerants are mildly flammable compared to other refrigerants. Does Kele carry any products that detect A2L refrigerants?” _builder_version=”4.27.5″ _module_preset=”default” title_font=”|700|||||||” title_font_size=”14px” global_colors_info=”{}”]<\/p>\n Kele does sell products that detect A2L refrigerants. When selecting a gas detector, the specific refrigerant must be identified because most detectors are calibrated for individual gases or refrigerant families.<\/p>\n These are some A2L-compatible refrigerant gas detection products available from Kele:<\/p>\n What are A2L refrigerants?<\/u><\/strong><\/p>\n A2L refrigerants<\/strong>\u00a0are a newer class of refrigerants developed to meet environmental regulations by significantly reducing global warming potential (GWP).<\/p>\n Because A2L refrigerants are mildly flammable, building and mechanical codes often require safeguards such as refrigerant leak detection systems, ventilation, and charge-limit compliance.<\/p>\n A2L refrigerants are becoming the standard replacement for many traditional HFCs in commercial HVAC systems due to their\u00a0lower environmental impact and improved energy efficiency<\/strong>.<\/p>\n [\/et_pb_toggle][et_pb_toggle title=”Q: I need parts for a project that has two mechanical rooms, each with one chiller, and I need a refrigerant monitor in each room with two remote detectors at the chillers, plus horns and strobes for alarming. Can you help?” open_toggle_background_color=”#FFFFFF” closed_toggle_background_color=”#efefef” admin_label=”Q: I need parts for a project that has two mechanical rooms, each with one chiller, and I need a refrigerant monitor in each room with two remote detectors at the chillers, plus horns and strobes for alarming. Can you help?” _builder_version=”4.27.5″ _module_preset=”default” title_font=”|700|||||||” title_font_size=”14px” global_colors_info=”{}”]<\/p>\n For this setup, our technician recommended using a\u00a0Honeywell Controller<\/strong><\/a>\u00a0with remote refrigerant sensors for each mechanical room. The\u00a0301EM<\/strong>\u00a0includes\u00a0four DPDT relays (5 A @ up to 250 V)<\/strong>\u00a0you can use to shut down chillers and start ventilation on alarm.<\/p>\n He went on to say you can order the version without the integral horn\/strobe, if the project plan is to use a remotely mounted notification device at the room entrance to meet code (rather than an on-panel strobe).<\/p>\n The customer would then pair each controller with\u00a0two<\/strong>\u00a0refrigerant sensors for the chillers, for a total of\u00a0four<\/strong>\u00a0sensors specified as\u00a0S301-IRF-R514A-K<\/strong><\/a>\u00a0(these are gas-specific, so confirm the refrigerant is\u00a0R514A<\/strong>\u00a0before ordering).<\/p>\n The tech went on to say that a remote display panel, such as the\u00a0301EMRP-K<\/strong><\/a>,<\/strong>\u00a0is\u00a0optional<\/strong>\u00a0and only required if you want a second readout outside the room.<\/p>\n [\/et_pb_toggle][et_pb_toggle title=”Q: I\u2019m having some issues with the AVS-200 air velocity sensors we purchased. Can you help?” open_toggle_background_color=”#FFFFFF” closed_toggle_background_color=”#efefef” admin_label=”Q: I\u2019m having some issues with the AVS-200 air velocity sensors we purchased. Can you help?” _builder_version=”4.27.5″ _module_preset=”default” title_font=”|700|||||||” title_font_size=”14px” global_colors_info=”{}”]<\/p>\n This customer was using a 125V incoming power source that stepped down to 24V. However, the actual output was 28V AC. Because of this higher voltage, it caused one of the three sensors to fail as they are rated for a maximum of 27V AC.<\/p>\n So, did the Kele tech team help source a solution?<\/p>\n Of course! Our tech team confirmed that these sensors do in fact accept both AC and DC power (despite some documentation showing only AC). Our tech team then suggested using a DC power supply as the most effective solution as DC power supplies are regulated, thus maintaining a consistent output voltage regardless of input fluctuations. An isolation transformer, while potentially useful for other applications, would not solve for the voltage regulation issue with AC power in this scenario.<\/p>\n Two options were suggested for specific DC product recommendations:<\/p>\n The Kele DCP-1.5-W is a regulated 1.5A power supply that accepts 24 VAC at the input and provides 24 VDC at the output. The DCP-1.5-W can be ordered with any output voltage from 1.5V to 27 VDC. Field voltage adjustments may also be made using only a screwdriver. The power supply is provided with a mounting track for easy field application. This low-cost power supply features good regulation and has full overcurrent protection.<\/p>\n The PSH Series Functional Devices enclosed 24 VAC Class 2 power source includes one or two transformers, pre-packaged in a metal enclosure. These are engineered for use in temperature control systems, industrial applications, and building automation systems. The transformers are available in 40VA, 75VA and 100VA sizes. A switch and circuit breaker are provided for switching the output of each transformer. An optional switch and circuit breaker are available for controlling power to the entire unit. Other handy features include an LED to indicate the presence of 24-volt AC at the Class 2 output terminals or wires, an internal high-voltage wiring compartment, and two optional 120-volt AC grounded convenience outlets.<\/p>\n [\/et_pb_toggle][et_pb_text admin_label=”Leak” _builder_version=”4.27.5″ _module_preset=”default” custom_padding=”0px|0px|0px|0px|false|false” border_width_bottom=”1px” global_colors_info=”{}”]<\/p>\n [\/et_pb_text][et_pb_toggle title=”Q: I am looking for a refrigerant leak detector for R32 that is going to be housed in a refrigerant shaft within a building. When it reaches a certain leakage amount, I need it to turn on an exhaust fan or be a relay to do that and then also generate an alarm somehow. Do you have a product you could recommend or an application that can help me out?” open_toggle_background_color=”#FFFFFF” closed_toggle_background_color=”#efefef” admin_label=”Q: I am looking for a refrigerant leak detector for R32 that is going to be housed in a refrigerant shaft within a building. When it reaches a certain leakage amount, I need it to turn on an exhaust fan or be a relay to do that and then also generate an alarm somehow. Do you have a product you could recommend or an application that can help me out?” _builder_version=”4.27.5″ _module_preset=”default” title_font=”|700|||||||” title_font_size=”14px” body_font_size=”12px” global_colors_info=”{}”]<\/p>\n \u00a0There were a few parameters that we needed to keep in mind:<\/p>\n Refrigerant transition for HVAC is required according to the EPA\u2019s authorization of the American Innovation and Manufacturing Act The customer was going to need a total of 20-25.<\/p>\n Our techs had their recommendation already in hand by the time the call ended! They recommended the Bacharach MGS-450 Series, specifically the 6302-1155, as the refrigerant that would work best for the customer\u2019s situation.<\/p>\n The Bacharach MGS-450 Series is a feature-rich refrigerant, toxic, and combustible gas detector with a remote sensor (up to 16 ft. or 5 m). The MGS-450 Series can be connected to a building management system using Modbus, MGS-408 Series gas detection controllers, or as a standalone gas detector for low-temperature, IP66 applications. In addition, the MGS-450 Series includes 3-output relays (fault, low alarm, high alarm) and an analog output for local alarming, auxiliary ventilation, or refrigerant flow restriction. The MGS-450 Series is ideal for all AHSRAE 15 or EN378 safety compliance applications, including cold storage, freezers, coolers, or mechanical room applications.<\/p>\n [\/et_pb_toggle][et_pb_toggle title=”Q: We\u2019ve got a Kele WD-2T Water Detector installed in a storage room next to some MRI equipment, and we\u2019re getting frequent false alarms. Can you help me troubleshoot?” open_toggle_background_color=”#FFFFFF” closed_toggle_background_color=”#efefef” admin_label=”Q: We\u2019ve got a Kele WD-2T Water Detector installed in a storage room next to some MRI equipment, and we\u2019re getting frequent false alarms. Can you help me troubleshoot?” _builder_version=”4.27.5″ _module_preset=”default” title_font=”|700|||||||” title_font_size=”14px” body_font_size=”12px” global_colors_info=”{}”]<\/p>\n A customer called in about excessive false alarms they were getting from a Kele WD-2T Water Detector. He went on to explain that the location of this part had become a high-traffic area: rolling chairs, cardboard boxes, and other storage items are constantly being moved over the sensors, causing approximately 80 alarms without any actual water leaks. The customer was wanting to know if the sensors were designed to withstand such foot traffic and debris or if they needed to be protected.<\/p>\n Our Kele technician clarified that the sensors are meant for very light traffic, such as in server rooms or underfloor scenarios. He explained that the tape contains two conductors, and if they are damaged or bunched up due to heavy traffic, it can cause false alarms. He suggested the alarms were likely due to damaged tape or conductive materials (like drywall goop or metal objects such as a fire extinguisher) lying across the sensors, creating continuity between the probes.<\/p>\n Our tech advised that the tape should have a resistance of 68,000 ohms when intact. He confirmed that the sensors can be cleaned with water and a light brush, or even a push broom, as they are resilient unless physically damaged. He also mentioned that replacement tape for the unit is also available at Kele. The customer planned to clean the sensors and recheck the resistance.<\/p>\n [\/et_pb_toggle][et_pb_toggle title=”Q: I\u2019m looking for leak detector that is FM approved. Does Kele carry one?” open_toggle_background_color=”#FFFFFF” closed_toggle_background_color=”#efefef” admin_label=”Q: I\u2019m looking for leak detector that is FM approved. Does Kele carry one?” _builder_version=”4.27.5″ _module_preset=”default” title_font=”|700|||||||” title_font_size=”14px” body_font_size=”12px” global_colors_info=”{}”]<\/p>\n We do. We\u2019ve recently added two TTK brand leak detectors to our offering that the supplier has assured us are FM (Factory Mutual) approved and hope to add more in the future. The two recommended are:<\/p>\n Note: Information above current as of 1\/21\/26.<\/em><\/p>\n MORE ON FM APPROVAL For water leak detectors specifically (e.g., systems certified under FM Standard 7745), an FM mark indicates the system will effectively detect and report leaks in time to minimize damage.<\/p>\n Unlike certifications that test individual components in ideal lab conditions, FM Approvals evaluates products and systems with emphasis on real-world performance and integration in building environments. This gives insurers confidence that the equipment will perform as intended on site, not just on paper.<\/p>\n [\/et_pb_toggle][\/et_pb_column][et_pb_column type=”1_2″ _builder_version=”4.27.5″ _module_preset=”default” global_colors_info=”{}”][et_pb_text admin_label=”Motor Controls” _builder_version=”4.27.5″ _module_preset=”default” custom_padding=”0px|0px|0px|0px|false|false” border_width_bottom=”1px” global_colors_info=”{}”]<\/p>\n [\/et_pb_text][et_pb_toggle title=”Q: My building’s main supply air fan (connected to an AHU serving a large open office area) seems to be running at full speed constantly, even when the zone thermostats are satisfied, and the VFD display shows it’s commanding down. This is causing excessive noise, uncomfortable drafts, and our energy consumption for that AHU is through the roof. I suspect something is wrong with the fan control loop, but I’m not sure where to start.” open_toggle_background_color=”#FFFFFF” closed_toggle_background_color=”#efefef” admin_label=”Q: My building’s main supply air fan (connected to an AHU serving a large open office area) seems to be running at full speed constantly, even when the zone thermostats are satisfied, and the VFD display shows it’s commanding down. This is causing excessive noise, uncomfortable drafts, and our energy consumption for that AHU is through the roof. I suspect something is wrong with the fan control loop, but I’m not sure where to start.” _builder_version=”4.27.5″ _module_preset=”default” title_font=”|700|||||||” title_font_size=”14px” body_font_size=”12px” global_colors_info=”{}”]<\/p>\n Well the Kele technical team asked the following questions to help troubleshoot for this customer who was out in the field and having issues.<\/p>\n And just like that\u2014the customer discovered a control wire from the BAS controller to the VFD was damaged. Our tech team suggested that they replace the wire with a\u00a0UL-rated plenum cable and shielded control wire<\/a>.<\/p>\n [\/et_pb_toggle][et_pb_text admin_label=”Panel Fabrication” _builder_version=”4.27.5″ _module_preset=”default” custom_padding=”0px|0px|0px|0px|false|false” border_width_bottom=”1px” global_colors_info=”{}”]<\/p>\n [\/et_pb_text][et_pb_toggle title=”Q: I have some ABB contacts in hand, but I can\u2019t seem to get them to fit together or get them to work. What am I missing here?” open_toggle_background_color=”#FFFFFF” closed_toggle_background_color=”#efefef” admin_label=”Q: I have some ABB contacts in hand, but I can\u2019t seem to get them to fit together or get them to work. What am I missing here?” _builder_version=”4.27.5″ _module_preset=”default” title_font=”|700|||||||” title_font_size=”14px” global_colors_info=”{}”]<\/p>\n This is a great question and one we get often for these particular pushbuttons<\/a> and contacts & holders<\/a>.<\/p>\n As long as you have the three pieces required, a pushbutton or switch, a holder, and a contact, they will work fine together. The most common oversight is that the contacts must be mounted in an OUTSIDE slot on the MCBH holder.<\/strong> They will not be initiated from the middle position, which is where everyone wants to first put it.<\/p>\n Here is a visual example:<\/p>\n <\/p>\n [\/et_pb_toggle][et_pb_text admin_label=”Power Monitoring” _builder_version=”4.27.5″ _module_preset=”default” custom_padding=”0px|0px|0px|0px|false|false” border_width_bottom=”1px” global_colors_info=”{}”]<\/p>\n [\/et_pb_text][et_pb_toggle title=”Q: I think I found a replacement for power meter my customer wants to retire in his building. What I see on your site looks like it\u2019ll be an exact fit. What else do I need to consider other than that?” open_toggle_background_color=”#FFFFFF” closed_toggle_background_color=”#efefef” admin_label=”Q: I think I found a replacement for power meter my customer wants to retire in his building. What I see on your site looks like it\u2019ll be an exact fit. What else do I need to consider other than that?” _builder_version=”4.27.5″ _module_preset=”default” title_font=”|700|||||||” title_font_size=”14px” body_font_size=”12px” global_colors_info=”{}”]<\/p>\n Once our tech team started digging, they found two BIG things that you always want to keep in mind if you ever find yourself in the same situation.<\/p>\n We verified all of the information and had the customer find out what the CT input was. After everything was all said and done, we were able to confirm that the power meter from Dent Instruments was indeed the right choice on the part of the customer and that it would work for what he wanted to do.<\/p>\n The DENT Instruments PowerScout 3037 comes in four basic configurations depending on whether a display or Ethernet port are desired. Instead of having one specific meter for a single job, the PowerScout 3037 can adapt to nearly any project requirement. All PowerScout 3037 models have a broadband power supply (80-600VAC) and can be paired with a variety of current transformers, from split cores that measure less than 1A up to large RoCoils designed for measuring 4000A. In addition, communication protocols are field-selectable. Easily toggle between Modbus or BACnet using ViewPoint software. Send kWh or other pulses to an external device. The pulse output is used to generate system kWh pulses for devices, such as data loggers, that can accept pulses, but do not have BACnet or Modbus capability. The PowerScout series networked power meters are designed to provide timely and accurate consumption data to gain the upper hand on electrical costs in today\u2019s escalating energy market. PowerScout meters can capture kWh\/kW energy and demand data as well as virtually all relevant energy parameters for diagnostics and monitoring on three-phase or single-phase circuit installations. The PowerScout\u2019s flexibility, size, and ease of use make them ideal tools for gathering detailed consumption data in commercial, industrial, government and retail environments. Kele is the leading supplier of building automation products. When you need the right product, right now, count on Kele.<\/p>\n When you\u2019re working on a building and dealing with obsolete parts (or anything else for that matter) the Kele Tech Team is here to help cover all the bases. So whether you\u2019re out in the field needing help\u2014or trying your darndest to just get the right part in so you can get back in the field\u2014the Kele Team is here to make it easy. Call us today or chat with online to help find the custom solution you\u2019re looking for.<\/p>\n Here\u2019s the link to the part:\u00a0https:\/\/www.kele.com\/product\/power-monitoring-and-protection\/power-meters\/dent-instruments\/ps3hd-c-d-n<\/a><\/p>\n [\/et_pb_toggle][et_pb_text admin_label=”Power Supplies” _builder_version=”4.27.5″ _module_preset=”default” custom_padding=”0px|0px|0px|0px|false|false” border_width_bottom=”1px” global_colors_info=”{}”]<\/p>\n [\/et_pb_text][et_pb_toggle title=”Q: I\u2019m having some issues with the AVS-200 air velocity sensors we purchased. Can you help?” open_toggle_background_color=”#FFFFFF” closed_toggle_background_color=”#efefef” admin_label=”Q: I\u2019m having some issues with the AVS-200 air velocity sensors we purchased. Can you help?” _builder_version=”4.27.5″ _module_preset=”default” title_font=”|700|||||||” title_font_size=”14px” body_font_size=”12px” global_colors_info=”{}”]<\/p>\n This customer was using a 125V incoming power source that stepped down to 24V. However, the actual output was 28V AC. Because of this higher voltage, it caused one of the three sensors to fail as they are rated for a maximum of 27V AC.<\/p>\n So, did the Kele tech team help source a solution?<\/p>\n Of course! Our tech team confirmed that these sensors do in fact accept both AC and DC power (despite some documentation showing only AC). Our tech team then suggested using a DC power supply as the most effective solution as DC power supplies are regulated, thus maintaining a consistent output voltage regardless of input fluctuations. An isolation transformer, while potentially useful for other applications, would not solve for the voltage regulation issue with AC power in this scenario.<\/p>\n Two options were suggested for specific DC product recommendations:<\/p>\n The Kele DCP-1.5-W is a regulated 1.5A power supply that accepts 24 VAC at the input and provides 24 VDC at the output. The DCP-1.5-W can be ordered with any output voltage from 1.5V to 27 VDC. Field voltage adjustments may also be made using only a screwdriver. The power supply is provided with a mounting track for easy field application. This low-cost power supply features good regulation and has full overcurrent protection.<\/p>\n The PSH Series Functional Devices enclosed 24 VAC Class 2 power source includes one or two transformers, pre-packaged in a metal enclosure. These are engineered for use in temperature control systems, industrial applications, and building automation systems. The transformers are available in 40VA, 75VA and 100VA sizes. A switch and circuit breaker are provided for switching the output of each transformer. An optional switch and circuit breaker are available for controlling power to the entire unit. Other handy features include an LED to indicate the presence of 24-volt AC at the Class 2 output terminals or wires, an internal high-voltage wiring compartment, and two optional 120-volt AC grounded convenience outlets.<\/p>\n [\/et_pb_toggle][et_pb_text admin_label=”Pressure Components” _builder_version=”4.27.5″ _module_preset=”default” custom_padding=”0px|0px|0px|0px|false|false” border_width_bottom=”1px” global_colors_info=”{}”]<\/p>\n [\/et_pb_text][et_pb_toggle title=”Q: Does this specific Belimo part have an electrical connection and plug? Some parts make you buy other parts, and I need to know if this is going to be one of them.” open_toggle_background_color=”#FFFFFF” closed_toggle_background_color=”#efefef” admin_label=”Q: Does this specific Belimo part have an electrical connection and plug? Some parts make you buy other parts, and I need to know if this is going to be one of them.” _builder_version=”4.27.5″ _module_preset=”default” title_font=”|700|||||||” title_font_size=”14px” global_colors_info=”{}”]<\/p>\n <\/p>\n So, was the Kele tech team able to address this customer\u2019s concerns?<\/p>\n Our techs were able to verify the parts information on the call and then pulled the part off the shelf to double-confirm and double-verify with the customer that they knew their stuff. The\u00a0Belimo 22WP Pressure Sensor (Liquid)<\/a>\u00a0was indeed the perfect part for the job and had what the customer wanted.<\/p>\n Belimo\u2019s 22WP Pressure Sensor (Liquid) Series comes with an active sensor (0-10 V or 4-20 mA) for measuring the pressure in liquid mediums for air conditioning, heating, and water applications. Suitable for plants with refrigerant. NEMA 4 \/ IP65 rated enclosure.<\/p>\n Product Series Features<\/strong><\/p>\n [\/et_pb_toggle][et_pb_text admin_label=”Temp Sensors & Transmitters” _builder_version=”4.27.5″ _module_preset=”default” custom_padding=”0px|0px|0px|0px|false|false” border_width_bottom=”1px” global_colors_info=”{}”]<\/p>\n [\/et_pb_text][et_pb_toggle title=”Q: At my facility, we are required to wash our dry ice containers with hot water at a certain temperature. I’m looking for some kind of temperature sensor that I can submerse and install in a line in one of our pipes. I just need some help to find the right part and components. Can you help me out?” open_toggle_background_color=”#FFFFFF” closed_toggle_background_color=”#efefef” admin_label=”Q: At my facility, we are required to wash our dry ice containers with hot water at a certain temperature. I’m looking for some kind of temperature sensor that I can submerse and install in a line in one of our pipes. I just need some help to find the right part and components. Can you help me out?” _builder_version=”4.27.5″ _module_preset=”default” title_font=”|700|||||||” title_font_size=”14px” body_font_size=”12px” global_colors_info=”{}”]<\/p>\n Here were a few parameters that we needed to keep in mind:<\/p>\n So what did the Kele Tech Team find for a solution?<\/p>\n After everything was all said and done and our techs did their due diligence and investigated some data sheets, the\u00a0ST-W91E-XW Immersion Temperature Sensor<\/a>\u00a0turned out to be the perfect solution!<\/p>\n The Precon Model ST-W Immersion Sensor from PreCon provides precise remote temperature sensing for Building Automation Systems, BAS, and mechanical equipment room instrumentation. The active sensing element is a highly stable precision thermistor material or platinum RTD. The sensing element is sealed with a temperature conductive compound in a 4-7\/8 in (12.4 cm) stainless steel tube and brass fitting. A brass thermowell is the standard well provided with each sensor. A Greenfield connector is factory installed for flexible connection. The probe assembly on these immersion sensors are removable for replacement without the draining system.<\/p>\n Our tech team also recommended the necessary parts needed for the entire process to work smoothly each and every time. Those parts were the:<\/p>\n [\/et_pb_toggle][et_pb_text admin_label=”Thermostats & Controllers” _builder_version=”4.27.5″ _module_preset=”default” custom_padding=”0px|0px|0px|0px|false|false” border_width_bottom=”1px” global_colors_info=”{}”]<\/p>\n [\/et_pb_text][et_pb_toggle title=”Q: I don\u2019t want to under-spec or over-spec this thermostat and end up with pricing issues. What information should I gather before requesting a quote?” open_toggle_background_color=”#FFFFFF” closed_toggle_background_color=”#efefef” admin_label=”Q: I don\u2019t want to under-spec or over-spec this thermostat and end up with pricing issues. What information should I gather before requesting a quote?” _builder_version=”4.27.5″ _module_preset=”default” title_font=”|700|||||||” title_font_size=”14px” body_font_size=”12px” global_colors_info=”{}”]<\/p>\n Great question! Providing these details upfront ensures accurate pricing and the correct thermostat for your application. To quote the correct thermostat quickly and accurately, we\u2019ve listed out the questions our techs will ask when you call.<\/p>\n\n
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Actuators & Dampers<\/h2>\n
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Alarms & Indication<\/h2>\n
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Gas & Specialty Sensors<\/h2>\n
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Leak<\/h2>\n
The Industry for Comfort, Heating, and Cooling has largely identified R454B and R32 as replacement refrigerants for R410A
Part of the code requirement in the IMC for these new A2L refrigerants is that anytime you penetrate two or more floors, the refrigerant pipes must be located in a refrigerant shaft. (See full code 1109.2.5 here).<\/p>\n\n
<\/u><\/strong>FM Approvals is a globally recognized third-party certification program focused on\u00a0property loss prevention<\/strong>. Products that earn the\u00a0FM Approved<\/em>\u00a0mark have passed rigorous testing for performance and reliability under conditions that simulate real-world hazards, including leaks, fire, water damage, and other risks.<\/p>\nMotor Controls<\/h2>\n
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Panel Fabrication<\/h2>\n
<\/p>\nPower Monitoring<\/h2>\n
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Power Supplies<\/h2>\n
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Pressure Components<\/h2>\n
There were a few parameters that we needed to keep in mind:<\/p>\n\n
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Temp Sensors & Transmitters<\/h2>\n
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Thermostats & Controllers<\/h2>\n