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SERVICE MANUAL 12VDC WALL THERMOSTAT AIR CONDITIONING SYSTEMS ROOFTOP UNITS ONLY

The following chart shows the different electrical connections made by the thermostat during operation. The chart below assumes12VDC(+) is supplied to thermostat Red wire “R” and that 12VDC(-) or ground is supplied to the Blue wire “B” at all times.Thermostats are very sensitive instruments. For accurate temperature control and comfort the following considerations for thermostat locations should be taken into account: 1. Locate the thermostat on an inside wall about five foot above the floor. Pick a dry area where air circulation is good. The thermostat should be mounted within a reasonable distance from the appliance the thermostat will control. This will assure a more accurate temperature relationship between the thermostat and the appliance the thermostat will control. 2. Do not install the thermostat where there are unusual heating conditions; such as direct sunlight, heat producing appliances (television, radio, wall lamp, etc.); or a furnace or air conditioner supply register. 3. Note: When installing or servicing these thermostats the technician should take all necessary precautions not to short any positive wire to ground. Permanent damage to the thermostat may occur. Make sure all connections are good and tight. Loose connections may cause relay chattering which leads to welded relay contacts on air conditioner printed circuit boards. Click here to get SERVICE MANUAL 12VDC WALL THERMOSTAT AIR CONDITIONING SYSTEMS ROOFTOP UNITS ONLY