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5126744-UIM-D-1015
SECTION VIII: TYPICAL WIRING DIAGRAMS
CAUTION - OPEN ALL DISCONNECTS
BEFORE SERVICING THIS UNIT
FOR WIRING WITH ELECTRIC HEATERS
SEE SCHEMATIC ON HEATER ACCESSORY.
FEMALE CONNECTOR
FOR 6HK HEATER KIT
1
2
3
BLU 27
24V COMMON
4
FIRST STAGE RELAY
5
WHT 26
OR SEQUENCER
6
BRN 28
SECOND STAGE RELAY
OR SEQUENCER
LOW
VOLTAGE
BOX
W2
C
BLU 29
R
RED 30
Y
YEL 19
W1
G
THERMOSTAT
1. ALL FIELD WIRING TO BE ACCOMPLISHED FOLLOWING CITY, LOCAL
AND/OR NATIONAL CODES IN EFFECT AT THE TIME OF INSTALLATION
OF THE UNIT.
2. CAUTION : LABEL ALL WIRES PRIOR TO DISCONNECTION WHEN
SERVICING CONTROLS. WIRING ERRORS CAN CAUSE IMPROPER
AND DANGEROUS OPERATION. IF ANY OF THE WIRING, AS SUPPLIED
WITH THE UNIT, MUST BE REMOVED, IT MUST BE REPLACED WITH
TYPE 105 C. 600 VOLT WIRE OR EQUIVALENT CLEARLY RENUMBERED
FOR IDENTIFICATION. VERIFY PROPER OPERATION AFTER SERVICING.
3. FACTORY WIRED FOR 230 VOLT SUPPLY POWER. FOR 208 VOLT,
MOVE BLACK WIRES FROM THE 230 TO THE 208 VOLT TAP ON THE
TRANSFORMER.
FIGURE 10: Connection Wiring Diagram - 2 to 3 Ton Models
18
CONNECTION WIRING DIAGRAM
COOLING UNIT WITH OR
WITHOUT ELECTRIC HEAT
WITH RECIPROCATING COMPRESSOR
208V
230V
24V SEC
CONTACTOR
40 VA
COIL
BLU 22
3A
FUSE
LINE VOLTAGE
FIELD INSTALLED POWER
LOW VOLTAGE
FIELD INSTALLED CONTROL
208/230-1-60
POWER SUPPLY
208/230-1-60
USE COPPER
CONDUCTORS
ONLY
BLK 6
PUR 1
COM
PRI
SINGLE POLE
CONTACTOR
L2
T2
START RELAY
1
2
5
YEL 16
START CAP
RED 8
YEL 18
HI PRESS
(CONTINUOUS FAN)
(COOLING SPEED)
(HEATING SPEED)
NOTES:
4. MOTORS ARE INHERENTLY PROTECTED.
5. SEE UNIT NAMEPLATE FOR MAXIMUM FUSE AND/OR CIRCUIT BREAKER
SIZE AND MINIMUM CIRCUIT AMPACITY.
6. BLOWER MOTOR SPEED CONNECTIONS SHOWN ARE TYPICAL, BUT
MAY VARY BY MODEL AND APPLICATION. SEE INSTALLATION MANUAL
FOR PROPER MOTOR SPEED INFORMATION FOR EACH APPLICATION TO
OBTAIN APPROX. 400 CFM/TON IN COOLING.
OPTIONAL CRANKCASE HEATER
CRANKCASE
TEMPERATURE
HEATER
SWITCH
GND
LUG
L1
T1
BRN
S
RED
BLK/WHT 12
DUAL
CAPACITOR
FAN
HERM
C
RED 7
BRN/WHT 13
BRN 15
GRN 10
RED 9
BLK 5
(LOW)
1
GRN 24
ID_FAN
(LOW/MED)
2
N
1
(MED)
3
M
G
YEL 20
2
230V
1
4
L
(MED/HIGH)
3
5
C
WHT 25
(HIGH)
4
INDOOR BLOWER 60 SECOND OFF
DELAY FOR BOTH HEAT & COOL MODES.
Johnson Controls Unitary Products
C
COMPR
230-1-60
1
R
1
BLK
2
3
BRN
OD_FAN
4
230-1-60
1
5
GRN
RED
6
GRN
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