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DELTA
zone 1
zone 1
zone 2
zone 2
zone 3
zone 3
fuse
fan control
thermal switch
zone dampers
jumper
zone valves
(8”NC)
n
o
ir
draft damper
motor
internal
blower
thermal
switch
terminal
block
draft
damper
thermostat
internal blower
speed control
black
white
black
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 zone heat system
zone thermostats
(heat only)
transformer