Wire Reference Chart - GE IS-ZW-TSTAT-300 Installation Manual

wire on your valve may be called, 6, Y, or G (see "Wire reference chart" on page
16).
Figure 16: Three-wire zoned hot water
C B O W W2 Y Y2 RH RC G A
Thermostat

Wire reference chart

Possible wires
R or V or VR
RH or 4
RC
W
W2
W3
Y
Y2
G or F
C or X
H
DH
EX
B
O
B and O
E
L
T
16
Motor valve
W R
A
C B O W W2 Y Y2 RH RC G A
What they control
RH and RC single power for heat and cool.
RH power for heat (RH not connected to RC jumper clip removed)
RC power for cool (RH not connected to RC jumper clip removed)
W heat control.
W2 2nd-stage heat or heat pump auxiliary heat.
W3 3rd-stage heat or 2nd-stage of two-stage auxiliary heat.
Y cool control or 1st-stage of compression for heat pump.
Y2 2nd-stage cool control or 2nd-stage compression for heat
pump.
G fan control.
C 24 VAC power (to power thermostat). Note: Trane uses B for
this connection.
H external humidifier.
DH external dehumidifier.
EX external fresh air baffle.
B heat pump changeover (cool to heat, powered in heat).
O heat pump changeover (heat to cool, powered in cool).
If there are both B and O wires (Trane pump products), do not
connect B to B terminal, connect B to C terminal. If not a Trane
product, tape off B.
N/A emergency heat (do not connect, tape off).
N/A system monitor (do not connect, tape off).
N/A outdoor sensor (do not connect, tape off).
IS-ZW-TSTAT-300 Advanced Thermostat Installation Guide
Solenoid valve
A R
W
Thermostat