www.desatech.com 111244-01D20INSTALLATIONContinued2. Connect one terminal of 25 ft. wire to the“TH” terminal on the control valve. Connectthe other terminal to the “THTP” terminal onthe control valve. See Figure 32.3. Route the 25 ft. wire to a convenient locationto mount your thermostat (no outside wall).IMPORTANT: The wire may be shortenedbut must not be lengthened.The thermostat should be mounted 54" abovethe floor in a location where there is goodair circulation. Avoid heat sources such aslamps, direct sunlight, fireplace, or heat andair conditioning ducts.4. Gently remove the cover of the thermostatfrom the base. Grasp the sides of the coverfirmly and pull to separate from the base.5. Feed the electrical wires through the rectangularslots on each side of the base (see Figure 33).WARNING: Do not con-nect the thermostat to a powersource. Electrical shock and/ora fire hazard will occur.6. Connect one bare wire end to each terminal(“W” and “R”) of the thermostat base (seeFigure 34).7. Install the base onto the wall with the providedscrews.8. Move the temperature adjustment back and forthto insure the bimetal is free from restrictions.9. Replace the cover onto the base. (Upon in-stallation, the thermostat must be allowed tostabilize at room temperature for a minimumof 30 minutes for proper operation).10. Set the temperature adjustment to the desiredsetting. This thermostat has been electroni-cally calibrated at the factory. No adjustmentor leveling is necessary.Figure 33 - Back View of Thermostat BaseFeed wires throughrectangular slotsWRFigure 34 - Thermostat Base Terminals“W” and “R”Terminal “W”Terminal “R”Figure 32 - Connecting Wire TerminalsTo WallThermostator SwitchTo WallThermostator SwitchControl ValveOPTIONAL WALL SWITCH - GWMS2(Remote-Ready Models Only)WARNING: Read and fol-low installation instructions.Installation should be done bya qualified installer familiar withlow-voltage wiring procedures.WARNING: Do not connectthis switch to any electricalsource! Electrical shock and/orfire hazard will occur.1. Remove jumper wire from control valve (seeFigure 27, page 19).2. Connect one terminal of 25 ft. wire to the“TH” terminal on the control valve. Connectthe other terminal to the “THTP” terminal onthe control valve. See Figure 32.3. Route the 25 ft. wire to a convenient location tomount your wall switch (no outside walls).WARNING: Do not connectthe switch to a power source.Electrical shock and/or fire haz-ard will occur.