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24
BLOWER OFF-DELAY
24-V THERMOSTAT
TERMINALS
3-AMP FUSE
LED OPERATION
& DIAGNOSTIC
LIGHT
BLOWER SPEED
SELECTION
TERMINALS
HEAT
FAN
COOL
SPARE 2
SPARE 1
115-VAC (L2)
NEUTRAL
CONNECTIONS
115-VAC (L1)
NEUTRAL
CONNECTIONS
EAC-1 TERMINAL
(115-VAC 1.0 AMP. MAX.)
PL2-HOT SURFACE
IGNITER & INDUCER
MOTOR CONNECTOR
PL1-LOW VOLTAGE
DRAIN HARNESS
CONNECTOR
TRANSFORMER
24-VAC CONNECTIONS
HUMIDIFIER TERMINAL
(24-VAC 0.5 AMP. MAX)
TWINNING AND/OR
COMPONENT TEST
TERMINAL
A08063
Fig. 24 -- Furnace Control
115-V FIELD-
SUPPLIED
DISCONNECT
AUXILIARY
J-BOX
24-V
TERMINAL
BLOCK
THREE-WIRE
HEATING-ONLY
FIVE WIRE
NOTE 1
NOTE 2
FIELD-SUPPLIED
DISCONNECT
CONDENSING
UNIT
TWO
WIRE
FURNACE
C
O
N
T
R
O
L
R
G
COM
WCR GY
GND
GND
FIELD 24-V WIRING
FIELD 115-, 208/230-, 460-V WIRING
FACTORY 24-V WIRING
FACTORY 115-V WIRING
208/230- OR
460-V
THREE
PHASE
208/230-V
SINGLE
PHASE
BLOWER DOOR SWITCH
WHT
BLK
WHT
BLK
NOTES: Connect Y-terminal in furnace as shown for proper blower operation.
Some thermostats require a "C" terminal connection as shown.
If any of the original wire, as supplied, must be replaced, use
same type or equivalent wire.
W
Y/Y2
GND
THERMOSTAT
TERMINALS
1.
2.
3.
A99440
Fig. 25 -- Heating a nd Cooling Application Wiring Diagram with 1--Stage Thermostat
58PHA