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Fig. 20—Typical Wiring Diagrams (Furnace with Air Conditioner) Continued
Locking furnace into
"low fire" may help
prevent over
conditioning in the
heating mode. This will
allow the furnace to
stage between low and
high fire. Before using
this feature read
furnace Installation
Instructions for two-
stage operation.
Connect "W2" from the
Comfort Zone Center
to "W2" on the furnace
control board.
UNIT 24 VAC (R)
C
R
Y1
L
2-SPEED
AIR CONDITIONER
(38TD)
Yellow
Red
Blue
White
Brown
Green
Orange
Black
COOL 1 (Y1)
COOL 2 (Y2)
HEAT 1 (W1)
HEAT 2 (W2)
FAN (G)
RV-COOL (O)
RV-HEAT (O)
OR
FURNACECOMFORT ZONE CENTER
Y2
H
R1 = Relay DPST, Pilot Duty,
24-v coil (HN61KK324) or Equivalent.
H = Humidistat, opens on humidity
rise (HL38MG026)
Latent Capacity Control (LCC)
I
R
C
W/W1
W2
G
Y/Y2
NOTE:
See Furnace Installation
Instructions For Details
Involving Set-Up Switch
Configuration and Two-
Stage Furnace Operation.
A93219
26