Typical Air Handler Thermostat Wiring; Typical Furnace Thermostat Wiring; Typical Field Wiring (Air Handler / Electrical Heat); Cfm Selection Board - York 12 SEER - CMA SERIES Installation Manual

035-19946-001 Rev. B (0804)
THERMOSTAT
C
Y
W
X/L
R
G
1
HUMIDISTAT CONTACTS OPEN ON HUMIDITY RISE.
HUMIDISTAT JUMPER ON CFM SELECTION BOARD MUST BE REMOVED.
2
Y1, Y2, X/L, AND HUM LOCATED ON CFM SELECTION BOARD.
FIGURE 6: Typical Air Handler Thermostat Wiring
ALL FIELD WIRING TO BE IN ACCORDANCE WITH ELECTRIC CODE (NEC) AND/OR LOCAL CODES
POWER WIRING
GND.
LUG
CONDENSING UNIT
ALL OUTDOOR WIRING MUST BE WEATHERPROOF. USE COPPER CONDUCTORS ONLY.
FIGURE 8: Typical Field Wiring (Air Handler / Electrical Heat)
CFM SELECTION BOARD SETTINGS

CFM SELECTION BOARD

TAP SELECTION
D
C
B
A
COOL HEAT ADJ
REMOVE FOR
HEAT PUMP HUMIDISTAT
FIGURE 9: CFM Selection Board
6
VARIABLE
AIR
SPEED
2
CONDITIONER
AIR HANDLER
C
CONTACTOR CONTACTOR
COIL COIL
Y
O
X/L
R
Y1
W2
W1
G
1
HUM
Y2
208/230-1-60
24 VOLT CONTROL WIRING
MINIMUM 18 GA. WIRE
(NEC CLASS 2)
*
TERMINAL W IS ONLY
REQUIRED ON SYSTEMS
WITH HEAT.
CONTACTOR
TERMINALS
COIL
D
C
B
A
DELAY
VARIABLE
SPEED
THERMOSTAT FURNACE
C
Y
W
R
G
1
HUMIDISTAT CONTACTS OPEN ON HUMIDITY RISE.
HUMIDISTAT JUMPER ON CFM SELECTION BOARD
MUST BE REMOVED.
FIGURE 7: Typical Furnace Thermostat Wiring
FURNACE OR AIR HANDLER TERMINAL BLOCK
C Y
Y
ROOM THERMOSTAT
For proper system operation the CFM Selection Board jumpers must be
set properly.
Refer to the Tabular Data Sheet for the recommended air flow settings
for each size condensing unit.
Set the cooling speed per the instructions for the air handler or furnace
by selecting the correct COOL and ADJ taps. Verify the airflow using
the LED display on the CFM selection board.
The HUMIDISTAT jumper must also be removed if a dehumidistat is
installed.
AIR
CONDITIONER
C
CONTACTOR CONTACTOR
COIL COIL
Y
O
X/L
R
Y1
W2
W1
G
1
HUM
Y2
POWER WIRING
CONTROL WIRING
FACTORY WIRING
R G W
*
R G W
Unitary Products Group