THERMOSTAT LOCATION (SG MODELS)
CAUTION — Do not run wire behind flanges of Header Plate or in any location where it might be damaged.
Millivolt wall thermostats are specially designed for use on self- generating systems. They should never be used on line or low voltage A.C. circuits.
Interior Wall — The thermostat should be installed on an inside wall away from the furnace but in the same room.
It is important to use wire of a gauge proper for the length of the wire:
RECOMMENDED WIRE GAUGES
Maximum Length | Wire Gauge |
1' to 10' | 18 |
10' to 25' | 16 |
25' to 35' | 14 |
Proper operation depends on a good pilot flame. The flame must cover the top of the thermopile. Cleaning of the pilot orifice and burner may be required due to spiders.
System Check (Figure 7)
Amillivolt meter is required to check the system. Millivolt readings should be:
•Across the thermopile terminals,
•Across the thermopile terminals,
•Across the thermostat wires at the valve, less than 30 millivolts with thermostat ON.
•Across the thermostat wires at the thermostat, less than 5 millivolts with thermostat ON. (Dirty pilot or low pressure will reduce readings.)
Connect thermostat wires to gas valve as shown in Figure 7.
Figure 7
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