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Installer's Guide
OUTDOOR UNIT NO. 1
(NO TRANSFORMER)
SEE NOTE 3
OUTDOOR UNIT NO. 2
(NO TRANSFORMER)
B/C
HUMIDISTAT HOOKUP
If an optional Humidistat is to be connected between
"R" and "BK", the factory installed jumper between "R"
and "BK" on the circuit board must be cut. If an optional
Humidistat is used, the jumper must also be cut when
applying an airflow command signal to the "BK" input
such as with the variable speed single-zone and multi-
zone system controller. On single speed cooling only/
non-heat pump systems, jumper "Y" to "O" for proper
operation of the delay profiles and the Humidistat. For
two compressor or two speed systems, jumper "Ylo" to
"O".
30
FIELD WIRING DIAGRAM FOR VARIABLE SPEED 2 STAGE FURNACE
2 STAGE HEATING, 2 STAGE COOLING
(OUTDOOR SECTION WITHOUT TRANSFORMER)
W14
SEE
NOTE 7
SEE
NOTE 6
B/C
TO 115 V 1 PH.,
60 HZ., POWER
SUPPLY PER
LOCAL CODES
HUM SEE
NOTE 5
The factory installed jumper be-
tween "R" and "BK" on the circuit
board must be cut if an optional
Humidistat is installed.
From Dwg. B342018 Rev. 0
18-CD25D1-2
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