GSZH5 Service Manual

107
WIRING DIAGRAMS
HIGH VOLTAGE! D
ISCONNECT ALL POWER BEFORE SERVICING
OR INSTALLING THIS UNIT.
M
ULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE TO DO SO MAY
CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.
Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring.
EMERGENCY
HEAT
RELAY
1 3
4 2
BLUE
WHITE
BLACK
BROWN
THERMOSTAT
OT/EHR18-60 #2
2
1
From Air Handler
C G W2 R
C R W2 O Y
From Outdoor Unit
C
G
W2
E
R
O
Y
Indoor Thermostat
W3
W3
BLUE
GREEN
WHITE
RED
BROWN
BLUE
RED
WHITE
ORANGE
YELLOW
15kw and Above with Two OT/EHR18-60's, Two Stage Electric Heat and Two Stage Thermostat
HEAT
RELAY
EMERGENCY
THERMOSTAT
1 4
3 2
1
2
BROWN
BLACK
WHITE
BLUE
OT/EHR18-60 #1
RED
RED
Typical Wiring Schematics for OT/EHR18-60 (Outdoor Thermostat & Emergency Heat Relay).
This wiring diagram is for reference only. Not all wiring is as shown above.
Refer to the appropriate wiring diagram for the unit being serviced.