FORM 2045-2 1306 ©2013 White-Rodgers by Permission
37-6864B
5
CZ-4 WIRING DIAGRAM
C W R Y G
E
G
Y
R
W/O/B
C
CLOSE
OPEN
COM
ZONE
CONNECTIONS
T
HE
RM
O
S
T
A
T
DA
M
P
E
R
Single Stage Thermostat
C W R Y G
E
G
Y
R
W/O/B
C
CLOSE
OPEN
COM
ZONE
CONNECTIONS
T
HE
RM
O
S
T
A
T
DA
M
P
E
R
Single Stage Thermostat
C W R Y G
E
G
Y
R
W/O/B
C
CLOSE
OPEN
COM
ZONE
CONNECTIONS
T
HE
RM
O
S
T
A
T
DA
M
P
E
R
Single Stage Thermostat
C W R Y G
E
G
Y
R
W/O/B
C
CLOSE
OPEN
COM
ZONE
CONNECTIONS
T
HE
RM
O
S
T
A
T
DA
M
P
E
R
Single Stage Thermostat
ON
OFF
H
EAT
PU
M
P
EQ
U
IP
F
A
N O
N
IN
HE
A
T
S
TA
T O
TO
W
S
TA
T B
TO
W
F
A
N I
N
P
URG
E
EM
ER
G
EN
C
Y H
EAT
ST
AG
E T
IM
E/
Z
O
N
E
CT
RL
3
1 2 3 4 5 6 7 8
W2
W1
Y1
Y2
O
G
E
B
R
First Stage Cooling Relay
24V. Transformer
Second Stage Cooling Relay
First Stage Heat Relay
Fan Relay
EQ
U
IP
M
EN
T
HEATING COOLING EQUIPMENT
Second Stage Heat Relay
W3
Third Stage Heat Relay
C
R
24VAC
24VAC
LAT1
LAT2
NO SENSOR
CLAS
100F
135F
170F
100F
135F
170F
0
1
2
3
4 5
6
7
8
9
0
1
2
3
4 5
6
7
8
9
BOOT
CLR PURGE
STG TIMER
5MIN +2x
HTG LIMIT
POWER
SYSTEM
