INSTALLATION
The control may be mounted in any location provided that the temperature and humidity of the air in which it is located will not cause a condensation on the switch parts.
1.The control should be mounted approximately six feet from the floor.
2.If the electric conduit goes to a warmer room, put rock wool around the wires in the conduit where it enters the control to prevent the flow of warm moist air into the switch.
CAUTION
Do not twist or uncoil the coiled bulb on the top of the control case. Do not attach conduit through coiled element to top of control. Instead, run con- duit to bottom of control.
WIRING
All wiring should be done in accordance with local and national electrical codes and ordinances.
If the manufacturer of the cooling equipment has supplied a wiring diagram, follow such recommendations. The following diagrams show general use of these controls.
| LINE | The diagram at left shows how a |
HOT | N | |
TYPE |
| 2A37 can be used to control an |
2A37 |
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11B09 |
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RETURN
TO LINE SWITCH |
AND POWER SUPPLY |
TYPE |
2A37 |
The above diagrams show how a type 2A37 thermostat can control several steam or hot water unit heaters. Any number of unit heaters can be operated from one control provided that the sum of the motor locked rotor currents or the sum of the full load currents does not exceed the
electrical rating of the thermostat. The Type 11B09 Re-
2
