5750156-UIM-B-0919
Johnson Controls Ducted Systems
23
FIGURE 13:
Ladder Wiring Diagram - 3.5 to 5 Ton Models
1174285-UWD-C-0519
Refer to Installation Manual for more detailed information.
COM
PRI
24V SEC
40 VA
208V
230V
L1
L2
COMPRES
R
C
S
BLOWER
MOTOR
L
N
G
BLOWER
MOTOR
5
3
C
1
HI PRESS
CONTACTOR
COIL
4
2
F
H
C
DUAL
CAPACITOR
T1
L1
L2
T2
DRAFT
MOTOR
CONTROL
BOARD
RELAY
CAP
BLU
RED
WHT
GRN
Y
R
G
C
THERMOSTAT
RED/GRN
ORG
RED
RED/BLK
ROLLOUT
PRESSURE
LIMIT
FS
L1
IND
SPARK
TRANSFORMER
YEL
YEL
GRN
ORG
4
5
6
1
2
3
7
8
9
3
2
1
24V COM
Y SPD
G SPD
W SPD
W
Y
O
R
G
C
RED
ORG
IGNITOR
FLAME
SENSOR
GAS
VALVE
CONTROL
BOARD
W
YEL
BLU
YEL
RED
WHT
3A
FUSE
BLK
RED
BRN
RED
OD FAN
MOTOR
R
C
S
BLK/WHT
RED
GROUND
LUG
BRN/WHT
IND
L1
PUR
BLK
WHT
BLK
PUR
PUR
BLU
RED
BLK
BLU
YEL
XFMR
208/230-1-60
LADDER WIRING DIAGRAM
COOLING UNIT WITH GAS HEAT
Flashes
Operational Fault Codes
Fault Condition
None
Slow Green Flashes
Slow Amber Flashes
Rapid Amber Flashes
4 Amber Flashes
Steady on Red
1 Red Flash
2 Red Flashes
3 Red Flashes
4 Red Flashes
5 Red Flashes
6 Red Flashes
7 Red Flashes
8 Red Flashes
9 Red Flashes
10 Red Flashes
11 Red Flashes
Standby mode
Call for furnace heat active
Control in Factory Test mode
Green Heartbeat
Amber Heartbeat
Rapid Green Flashes
Power Off or open fuse
Normal Operation
Normal Operation with call for heat
Low flame sense current
No G from thermostat with Y call
Control Failure
Flame present with gas off
Check pressure switch wiring
Vent OR termination problem
Airflow problem
Flame Rollout
Repeated pressure switch cycles
Failed to light burners
Loss of flame during call for heat
Incorrect polarity OR Don't have neutral
Gas valve shorted "ON"
Check blower motor/wiring
DSI Fault Codes
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 WIRES 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.
7. BLOWER MOTOR SPEED CONNECTIONS SHOWN ARE TYPICAL,
BUT MAY VARY BY MODEL AND APPLICATION.
NOTES:
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
LINE VOLTAGE
FIELD INSTALLED POWER
LOW VOLTAGE
FIELD INSTALLED CONTROL
