Wiring schematic
208V/240V/277V
CAUTION: Not following proper wiring procedure can cause injury or death
Wire termination
Factory wire, not connected
Wire connection
Factory wired 16AWG
Factory wired 18AWG
Field wired
-
L2 HOT
L1 HOT
BLACK
BLACK
INPUT VOLTAGE
DISCONNECT
SWITCH
(OPTIONAL)
B
R
AQUASTAT
FAN CONTROL
(OPTIONAL)
RETURN AIR
FAN CONTROL
(OPTIONAL)
WALL
THERMOSTAT
(OPTIONAL)
YEL
R
B
BLACK
BLACK
RED
RED
WHITE
YELLOW
WHITE
YELLOW
BLUE
BLUE
*BROWN TERMINATED
IF NO DAMPER MOTOR
(OPTIONAL)
*BROWN
BLACK
BLUE
RED
DAMPER
MOTOR
3-SPEED SWITCH
CONTROL PACKAGE
(OPTIONAL)
H
L
M
BLOWER
MOTOR
MOTOR QUICK
CONNECT
(OPTIONAL)
HEATER
L1
T1
L2
T2
MANUAL MOTOR
STARTER
(OPTIONAL)
TRANSFORMER
L2
M2
FREEZESTAT
(OPTIONAL)
BLACK
BLACK
BLACK
WHITE
SEE CHART
SEE CHART
SEE CHART
PSC MOTOR
(OPTION)
NOTE:
FOR HIGH STATIC MOTORS USE THE FOLLOWING
3 SPEED SWITCH WIRING CONFIGURATION:
RED/LOW - BLUE/MED - BLACK/HIGH
YELLOW
COMPLETE THE WIRING IN ACCORDANCE WITH
NATIONAL AND LOCAL CODES.
WIRING DIAGRAM IS FOR TYPICAL APPLICATION.
IF OTHER CONTROLS ARE SPECIFIED WIRING MAY
DIFFER FROM WHAT IS SHOWN.
MODELS RC, RRC, RFRC UNITS GET 3 SPEED
SWITCHES SHIPPED LOOSE FOR FIELD WIRING.
TRANSFORMER AND FUSES ARE SIZED SPECIFIC TO CUH UNIT SIZE.
WIRE TRANSFORMER PRIMARY ACCORDINGTO INPUT VOLTAGE
(208V/240V/277V). WIRE TRANSFORMER SECONDARY FOR 120VAC.
NOTES:
Wiring schematic
19