Empire Comfort Systems GWT-50-2 用户手册

12426-4-0104 

    Page 11

CAUTION — Do not run wire behind ß anges 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.  

Note:   Use 16 gauge wire to prevent excessive loss of milli-
volts.

Proper operation depends on a good pilot ß ame.  The ß ame must 
cover the top of the thermopile.  Cleaning of the pilot oriÞ ce and 
burner may be required due to spiders.

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  

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.