WIRING DIAGRAMS

| 120V | 240V | THERMOSTAT |

 

All wiring should be done in accordance with applicable local and national electrical codes. 

Turn power off until installation is complete.

120V WIRING DIAGRAM SPECIFICATIONS:

The 8A18Z-2 Evaporative Cooler Control consists of 3 relays and a low voltage transformer with dual voltage primary.  The pump relay is automatically operated, which allows the cooler pads to become wet before the fan starts. This will eliminate the fan from blowing dust, warm air, and odor on initial start-up.  The fan relay controls the operating of a two-speed fan motor.  The thermostat controls operation of the fan without the pump when the thermostat subbase is in the vent position, and controls operation of both fan and pump when the thermostat subbase is in the cool position.

Elect. Ratings

Pump Rating

Fan

Rating

Mtg

Dim.

WxHxD

Operating Ambient Temperature Range

Combined Total Connected Load

Power Consumption

Input voltage:  120 or 240V AC, 60 Hz.

5 FLA.,

30 LRA; 240V AC

10 FLA., 60 LRA; 120V AC

12 FLA.,

 72 LRA; 120V AC

6 FLA.,

36 LRA; 240V AC

Four 9/32" Dia. Holes

 

(2-1/2" x 5" center line to center line)

6" x 8" x 3"

40 to 150 F

(5 to 65 C)

16 FLA., 120V AC

 

8 FLA.,

240V AC

6 Watts nominal with all 3 relays energized

240V WIRING DIAGRAM SPECIFICATIONS:

After mounting and wiring have been completed, set thermostat switch to "OFF" position and fan switch to ""LO" position.  Turn thermostat lever to "5" and thermostat to "COOL".  Nothing should happen provided the room temperature is below 95F.  Turn the thermostat lever to "1".  The pump should start immediately, provided the room temperature is above 55F.  After a time delay of 30 to 120 seconds to allow the cooling pads to become soaked, the fan should start running at low speed.  Turn thermostat switch to "HI" position.  The fan should now be operating on high speed.  Turn thermostat switch to '"VENT" position.  The pump should stop immediately.  Turn the thermostat switch to "OFF" position.  After a delay of 3 to 30 seconds, the fan should stop running.

THERMOSTAT WIRING DIAGRAM SPECIFICATIONS:

Elect. Ratings

Switch Action

Dim.

WxHxD

Temperature Scale Range

Differential
30V.A.C. Max. SPST-Sealed Mercury Contacts, close on temperature rise. 3-1/4" x 4-1/2" x 1-5/8" 1 to 5 (Cooler to Warmer) 1F

NOTE:  See Instruction Sheet on 8A18Z-2 Evaporative Cooler Control for typical system hook-up.

 

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