Assessments - 2, GPA: 3
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Drafts from inside the wall could affect temperature readings. 3. Fasten the base to the wall with the supplied screws. 4. Seal the wire entry with caulk, drywall putty, or insulation. Wiring the Thermostat Note: A qualified HVAC technician should perform these steps to ensure proper termination. 1. Make sure the HVAC system power is off. 2. Strip 1/4" (0.63 cm) of insulation from each wire you are using. 3. Secure the wires into the terminals on the base according to the appropriate wiring diagram. Use color-coding practices (i.e. white wire to W terminal) whenever possible. 4. Check each wire to ensure it is securely fastened, not broken, and any exposed wires are not touching each other. Wiring for AxLink Follow these steps to connect the wiring into a captive-wire connector: 1. Strip 1/4 inch off the wire insulation for all four wires. 2. Tin 2/3 of the exposed wire. 3. Insert each wire into the appropriate captive-wire connector up to the insulation. 4. Tighten the captive screws to secure the fit in the connector. Use 18 AWG wire to connect the AxLink wiring from the thermostat to the connector on the AxLink device as shown in FIG. 2. FIG. 2 AxLink wiring Note: The ViewStat Color Communicating Thermostat interfaces with a 24 VAC power supply from the heating/cooling unit through its RC terminal. You should not connect the power wiring from the AxLink device to the thermostat with the intent of using the AxLink device to provide power to the thermostat. The L1 terminal on the thermostat can accept the AxLink +12VDC wire and you can connect the wire to the terminal if you want to assure there are no loose wires inside the thermostat, but you should not power the thermostat by running a jumper to the RC pin. Wiring Diagrams ViewStat Color Communicating Thermostats are equipped with terminals RC, RH, C, Y, W, G, O, B, S1, S2, L1, L2, L3, and L4. You can use terminals S1 and S2 to accomodate a remote temperature sensor. Terminals L1-L4 connect to the AxLink cable. The remaining terminals are used to control various types of heating and cooling systems. You can use the thermostat with the following types of heating and cooling systems: • Single Stage Furnace and Single Stage A/C • Dual Stage Furnace and Dual Stage A/C • Roof Top Unit with Dual Stage Heat and Dual Stage Cool • Boiler with A/C with Separate Transformers • Single Stage Heat Pump • Two Stage Heat Pump • First Stage Radiant Floor Heat, Second Stage Furnace One Stage of Cooling Communication and Equipment Terminal Wiring Definitions FIG. 3 displays the terminal layout for the thermostat. FIG. 3 Terminal Layout The following table lists the communication and equipment terminal wiring definitions: Communication and Equipment Terminal Wiring Definitions (Cont.) Y2 2nd stage compressor B Reversing valve (heat) O Reversing valve (cool) DEH Dehumidify HUM Humidify S1 External thermistor. The ViewStat Color Communicating Thermostat supports only one external sensor. S2 External thermistor. The ViewStat Color Communicating Thermostat supports only one external sensor. L1 AxLink PWR L2 AxLink AxP L3 AxLink AxM L4 AxLink GND Single Stage Furnace and Single Stage A/C FIG. 4 displays the thermostat wiring for a system with a single stage furnace and A/C. FIG. 4 Single Stage Furnace and Single Stage A/C wiring The thermostat automatically defaults to One Stage Furnace for the HVAC System setting when you install it. For information about changing the HVAC System setting, consult the Changing the Type of HVAC System section in the ViewStat Color Communciating Thermostat User Guide. Dual Stage Furnace and Dual Stage A/C FIG. 5 displays the thermostat wiring for a system with a dual stage furnace and A/C. Communication and Equipment Terminal Wiring Definitions RH 24 VAC in RC 24 VAC in for AC relays. If a separate 24 VAC is not supplied to the RC terminal, you should install a jumper from RH to RC. C 24 VAC common G1 Fan on 1. If you are using a single speed fan, you should connect it to the G1 terminal. On a multi-speed fan, G1 is the lowest speed. G2 Fan on 2. On a multi-speed fan, G2 is the medium speed. G3 Fan on 3. On a multi-speed fan, G3 is the highest speed. W1 1st stage heat W2 2nd stage heat Y1 1st stage compressor FIG. 5 Dual Stage Furnace and Dual Stage A/C wiring For wiring diagrams of other types of heating and cooling systems, consult the ViewStat Color Communicating Thermostat Operation/Reference Guide. For full warranty information, refer to the AMX Instruction Manual(s) associated with your Product(s). 93-2050-01 REV: C 10/08 ©2008 AMX. All rights reserved. AMX and the AMX logo are registered trademarks of AMX. AMX reserves the right to alter specifications without notice at any time. 3000 RESEARCH DRIVE, RICHARDSON, TX 75082 • 800.222.0193 • fax 469.624.7153 • technical support 800.932.6993 • ...
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