INSTALLATION
Continued
2.Connect one terminal of 25 ft. wire to the “TH” terminal on the control valve. Connect the other terminal to the “THTP” terminal on the control valve. See Figure 31.
3.Route the 25 ft. wire to a convenient location to mount your thermostat (no outside wall). IMPORTANT: The wire may be shortened but must not be lengthened.
The thermostat should be mounted 54" above the floor in a location where there is good air circulation. Avoid heat sources such as lamps, direct sunlight, fireplace or heat and air conditioning ducts.
4.Gently remove the cover of the thermostat from the base. Grasp the sides of the cover firmly and pull to separate from the base.
5.Feed the electrical wires through the rectangular slots on each side of the base (see Figure 32).
WARNING: Do not con- nect the thermostat to a power source. Electrical shock and/or a fire hazard will occur.
6.Connect one bare wire end to each terminal (“W” and “R”) of the thermostat base (see Figure 33).
7.Install the base onto the wall with the pro- vided screws.
8.Move the temperature adjustment back and forth to insure the bimetal is free from restrictions.
9.Replace the cover onto the base. (Upon in- stallation, the thermostat must be allowed to stabilize at room temperature for a minimum of 30 minutes for proper operation).
10.Set the temperature adjustment to the desired setting. This thermostat has been electroni- cally calibrated at the factory. No adjustment or leveling is necessary.
Control Valve
To Wall Thermostat or Switch
To Wall
Thermostat
or Switch
Figure 31 - Connecting Wire Terminals
Feed wires through rectangular slots
Figure 32 - Back View of Thermostat Base
Terminal “W” 
W
Terminal “R” R
Figure 33 - Thermostat Base Terminals
“W” and “R”
OPTIONAL WALL SWITCH - GWMS2
WARNING: Read and fol- low installation instructions. Installation should be done by a qualified installer familiar with
WARNING: Do not connect this switch to any electrical source! Electrical shock and/or fire hazard will occur.
1.Remove jumper wire from control valve (see Figure 26, page 19).
2.Connect one terminal of 25 ft. wire to the “TH” terminal on the control valve. Connect the other terminal to the “THTP” terminal on the control valve. See Figure 31.
3.Route the 25 ft. wire to a convenient location to mount your wall switch (no outside walls).
WARNING: Do not connect the switch to a power source. Electrical shock and/or fire haz- ard will occur.
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