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zone 1
zone 1
zone 2
zone 2
zone 3
zone 3
Fuse
Blower control
Thermal switch
Zone dampers
Jumper
Zone valves
(8”NC)
b
la
c
k
Draft
damper
motor
Internal
blower
Thermal
switch
Terminal
switch
Draft
damper
thermostat
Internal
blower speed
control
black
white
black
ground (bare)
110V
relay
y
e
llo
w
w
h
ite
b
la
c
k
External
blower
control
External
central heat
blower
24V
18ga
LVT
white
Figure 38: Wiring for all systems with a zone heat system
OPEL AP
Zone
thermostat
(Heat Only)