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Figure 5
Figure 5a
THERMOSTAT LOCATION
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 6)
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. (Strong winds, dirty pilot and low pressure will reduce readings.)
Piezo Pilot Ignitor Instructions
Depressing the red button completely causes a spark to occur at the pilot. This is a substitute for a match which requires opening the pilot hole cover.
To light the pilot, it is important that the electrode be 1/8" (3mm) from the thermopile. The spark must occur at the point the burner flame hits the thermopile. The end of the electrode will be red hot with the pilot on.
On a new installation with air in the gas line, it is suggested that a match be used. The match will light the pilot faster than the piezo under this condition.
Figure 6
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