Gray thermostat box with dial and attached copper bulb on a long coil.

A28AA-4C | Johnson Controls | Thermostats & Controllers

Two Stage Temp Control, 30/110F, Coiled Bulb, Type 1 NEMA, 2-SPDT, Diff 3.5 Fixed

Brand:Johnson Controls

MPN:A28AA-4C

SKU:A28AA-4C

List Price:

$651.00

Today's Price:

$338.52

product datasheet

installation instructions

catalog page

product specifications

Stages

Two Stage

System Switching

Fan Switching

Controls Outputs

2 SPDT

Type

Remote Bulb

Set Point Range

30 to 110 °F

product series features

SPDT switching
Front control set point
Adjustable differential
No power required (A19)

more information & related documents

Series Description

The Johnson Controls A19 Series is a single stage, heating or cooling, SPDT temperature control that uses a liquid-filled sensing element and capillary. The unit has an exposed or concealed set point dial with adjustable differential, and it will switch line voltages.The A28 Series is a two stage, heating or cooling, w/2-SPDT temperature control that uses a liquid-filled sensing element and capillary. The unit has an exposed or concealed set point dial with adjustable differential, and it will switch line voltages.

Kele Description

2 STAGE, SPACE, 30-110F, 2-SPDT, 2FT COIL

Manufacturer

Johnson Controls