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A28 Series
Two Stage Flange Mounted Duct
Thermostat
Description
The A28AK is a two stage temperature control with special
air coil sensing element and adjustable mounting flange.
Applications
These duct thermostats are used on roof top units,
make-up heaters, duct heaters, and air handling systems of all types.
Features
- flat flange mounting with special coil element permits
positioning of sensing bulb in the appropriate portion of the air stream
- 2 SPDT snap acting switches
- unaffected by barometric pressure or cross ambient
temperatures
Electrical Ratings
|
Motor Ratings VAC |
120 |
208 |
240 |
277 |
|
AC Full Load Amp |
6.0 |
3.4 |
3.0 |
- |
|
AC Locked Rotor Amp |
36.0 |
20.4 |
18.0 |
- |
|
Non-Inductive or Resistance Load Amps (Not Lamp Loads) |
10.0 |
9.2 |
8.0 |
7.2 |
|
Pilot Duty - 125 VA, 24 to 277VAC |
Note: When used as
two circuit control, the total connected load must not exceed 2000VA.
Selection Chart
|
Code Number |
Number of Stages |
Switch Action |
Range F (C) |
Maximum Allowable Temperature at Bulb F (C) |
|
Each Stage |
Between Stage |
|
A28AK-1C |
2 |
2-SPDT Switches |
2 (1.1) |
3 (1.7) |
140 (60) |
|
A28AK-2C |
2 |
2-SPDT Switches |
2 (1.1) |
3 (1.7) |
200 (93) |
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