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Installation Guide
69-2199—01 6
HEAT PUMP
Fig. 12. Zone panel wiring—heat pump with electric auxiliary heat.
Use the following diagram for wiring a heat pump with electric auxiliary heat.
NOTE: You can use a conventional thermostat for a heat pump system; however, em heat can only be controlled by
heat pump thermostats. The diagram below shows a heat pump thermostat used with a heat pump system.
1
2
1
2
1
2
Rc
R
C
E
AUX
Y
G
O/B
L
Rc
R
C
E
AUX
Y
G
O/B
L
Rc
R
C
E
AUX
Y
G
O/B
L
1
ALTERNATIVELY LABELED W2 ON SOME THERMOSTATS.
2
FOR THERMOSTATS WITH SEPARATE O AND B TERMINALS,
ATTACH O FOR COOL CHANGEOVER OR ATTACH B
FOR HEAT CHANGEOVER.
3
IF HVAC EQUIPMENT USES THE SAME SOURCE OF HEAT FOR
AUXILIARY AND EMERGENCY HEAT, JUMPER W1/E AND W2.
M4 OPEN
M6 CLOSED
M1 COMMON
M28020
R
C
L1
(HOT)
L2
AIR
HANDLER
FAN RELAY
EM. HEAT
AUX. HEAT
G
Y
24 VOLT TRANS.
C
R
E
W2
C7735A1000
DATS
HEAT PUMP
Y
C
R
DEDICATED
TRANSFORMER
ARD OR ZD DAMPER SPRING-OPEN POWER-CLOSED
ARD OR ZD DAMPER SPRING-OPEN
POWER-CLOSED
RRD OR MARD DAMPER POWER-OPEN
POWER-CLOSED
REVERSING VALVE
RH
RC
W1/E
W2
Y1
Y2
G
O
B
DS/BK
HZ322
HEAT 1
HEAT 2
COOL 1
COOL 2
FAN
PURGE
EM HEAT
ZONE 1
ZONE 2
ZONE 3
EMERGENCY
HEAT
M1
M4
M6
R
C
W1/E
W2
Y1
Y2
G
O/B
L
Zone 1
DAMPER
THERMOSTAT
M1
M4
M6
R
C
W1/E
W2
Y1
Y2
G
O/B
L
Zone 2
DAMPER
THERMOSTAT
SENSOR
DATS
DATS
EQUIPMENT
R
C
POWER
M1
M4
M6
R
C
W1/E
W2
Y1
Y2
G
O/B
L
Zone 3
DAMPER
THERMOSTAT
3
A
B
C
D
WIRELESS
ADAPTER
WIRELESS
CONNECT
POWER
THM4000R
CONNECTED
WIRELESS SETUP