AMX ENV-VST-C - Manual (Page 13)

Installation and Wiring
7 ViewStat Color Communicating Thermostat
Communication and Equipment Terminal Wiring Definitions
The following table lists the communication and equipment terminal wiring definitions.
Preparing Captive Wires
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.
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
Y2 2nd stage compressor
B Reversing valve (heat)
O Reversing valve (cool)
DEH Dehumidify
HUM Humidify
S1 External thermistor. The Color ViewStat supports only one
external sensor.
S2 External thermistor. The Color ViewStat supports only one
external sensor.
L1 AxLink PWR
L2 AxLink AxP
L3 AxLink AxM
L4 AxLink GND