Empire Products GWT-25-2(SG Manuale Utente
12425-10-1008
Page 11
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-
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
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)
System Check (Figure 7)
A millivolt meter is required to check the system. Millivolt readings
should be:
• Across the thermopile terminals, 400-450 millivolts with
• Across the thermopile terminals, 400-450 millivolts with
thermostat OFF.
• Across the thermopile terminals, 150-250 millivolts with
thermostat ON.
• 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
THERMOSTAT LOCATION (SG MODELS)