1183746-UIM-B-0215
Johnson Controls Unitary Products
19
SECTION VII: TYPICAL WIRING DIAGRAMS
FIGURE 10:
Connection Wiring Diagram - 2 to 3 Ton Models
BLU 23
RED 22
WHT 20
GRN 19
Y
R
G
C
THERMOSTAT
USE COPPER
CONDUCTORS
ONLY
RED/GRN 36
ORG 39
RED 34
YEL 31
WHT 33
GRN 4
(LOW)
(LOW/MED)
(MED)
(MED/HIGH)
(HIGH)
RED 32
RED/BLK 35
ROLLOUT
PRESSURE
LIMIT
BLOWER
DELAY
60
90
120
180
FS
L1
IND
SPARK
TRANSFORMER
C
L
G
N
1
2
3
4
5
1
2
3
4
DRAFT
MOTOR
YEL 16
HI PRESS
YEL 38
YEL 38
GRN 40
ORG 37
4
5
6
1
2
3
7
8
9
3
2
1
24V COM
Y SPD
G SPD
W SPD
R
O
Y
W
C
BRN
YEL
WHT 27
CONTROL BOARD SETTINGS:
COMBUSTION BLOWER POST PURGE: 60 SEC
INDOOR BLOWER HEAT ON DELAY: 30 SEC
INDOOR BLOWER COOL OFF DELAY: 60 SEC
INDOOR BLOWER HEAT OFF DELAY: FIELD SELECT
WITH RECIPROCATING COMPRESSOR
W
Y
O
R
G
C
LOW
VOLTAGE
BOX
RED 28
ORG
IGNITOR
FLAME
SENSOR
GAS
VALVE
CONTROL
BOARD
CAP
PUR 26
W
(COOLING SPEED)
(HEATING SPEED)
(CONTINUOUS FAN)
BLK
BRN
RED
BLK/WHT 12
BRN/WHT 13
BLK 6
RED 9
OD FAN
MOTOR
POWER SUPPLY
208/230-1-60
PUR 1
BLK 5
YEL 46
RED 8
BRN 15
COM
PRI
24V SEC
40 VA
208V
230V
COMPR
C
S
R
L1
T1
T2
L2
START CAP
1
2
5
START RELAY
FAN
HERM
C
DUAL
CAPACITOR
RED 7
GRN
BLU 43
GND
BLK/WHT 11
CONTACTOR
COIL
SINGLE POLE
CONTACTOR
RED 45
BLU 42
BLU 30
PUR 2
YEL 21
BLK
YEL 18
GRN 44
LINE VOLTAGE
FIELD INSTALLED POWER
LOW VOLTAGE
FIELD INSTALLED CONTROL
5
4
3
2
6
1
BLK
BRN
GRN 10
RED
COOLING UNIT WITH GAS HEAT
CONNECTION WIRING DIAGRAM
CAUTION - OPEN ALL DISCONNECTS
BEFORE SERVICING THIS UNIT
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 WIRE FROM THE 230 TO THE 208 VOLT TAP ON THE TRANSFORMER.
4. MOTORS ARE INHERENTLY PROTECTED.
5. SEE UNIT NAMEPLATE FOR MAXIMUM FUSE AND/OR CIRCUIT BREAKER SIZE
AND MINIMUM CIRCUIT AMPACITY.
6. SELECT INDOOR BLOWER SPEED TO REMAIN WITHIN THE TEMPERATURE
RISE RANGE ON THE NAMEPLATE IN HEATING AND TO OBTAIN APPROX.
400 CFM/TON IN COOLING.
NOTES:
BLOWER
MOTOR
SHARED TAP
208/230-1-60
SEE NOTE 7
7. BLOWER MOTOR SPEED CONNECTIONS SHOWN ARE TYPICAL,
BUT MAY VARY BY MODEL AND APPLICATION.
XFMR
