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SECTION X: WIRING DIAGRAM
CAUTION
OPEN ALL DISCONNECTS BEFORE
SERVICING THIS UNIT
1600/2000 CFM
MODELS ONLY
BLK
BLOWER
GRN
MOTOR
WHT
BRN
PUR
GRN
ORG
(8) PUR
(16) ORG
(7) EMPTY
(15) GRN
(6) EMPTY
(14) EMPTY
(13) EMPTY
(5) EMPTY
(12) EMPTY
(4) EMPTY
(11) EMPTY
(3) BLK/WHT
(10) RED
(2) EMPTY
(9) EMPTY
(1) EMPTY
N.O.SW DOOR SWITCH
DS
NO
C
1600/2000 CFM
MODELS ONLY
PF
EAC
HUMIDIFIER
HSI
115V
R
R
PS1
LS
ROS1
W1
W1
NO
C
W
W
1ST STAGE
W2
W2
2-STAGE HEATING
G
G
2-STAGE COOLING
ROOM THERMOSTAT
Y1
Y1
Y2
Y2
TO AIR CONDITIONER
Y
Y
CONTROLS
C
C
COMMON T'STAT CONNECTION
NOTES:
1. If any of the original wire as supplied with the furnace must be replaced,
it must be replaced with wiring material having a temperature rating of at
least 221 degrees F (105 degrees C).
2. Connectors suitable for copper conductors only.
NOTES:
1. Si l'un des fils d'origine fourni avec ce four doit filage doit être remplacé,
il doit être remplacé avec le fil ayant un degré de température d'au
moins 221 degrés F (105 degrés C ).
2. Seulement des marettes pour fil de cuivre.
FIGURE 31: Wiring Diagram
Johnson Controls Unitary Products
Wiring Diagram 80% Two-Stage COMM Furnace
BRN
GND
3
2
5
4
1
3
2
1
6 5
4
HUM
NEUTRALS
EAC
4 1
5
2
3
6
BLK/WHT
RED
GRN
GRN
FURNACE CONTROL
DE-
W/W1
HUM
C G R
Y/Y2
Y1
POWER SUPPLY 115-1-60
BLOWER
MOTOR
HIGH
IDM
LOW
COM
PRI
1T (40VA)
24V SEC
ROS2
M
PS2
C
NO
C
HI
2ND STAGE
GAS VALVE
DOOR N.O.SW
BLK
BLK
NO
C
P3/S3
1
WHT
GRY
HSI
GRY
2
WHT
WHT
BLK
115V PRI
LINE
24V SEC
LOAD
BRN
1
4
7
10
RED/WHT
8
2
5
11
ORG/BLK
3
6
9
12
W2
O
Diagnostic Fault Codes
Flashes
Fault Condition
None
Power Off
Normal Operation
Slow Green
Slow Amber
Normal Operation with call for heat
Rapid Amber
Low flame sense current
4 Amber
No G from thermostat
Steady on Red
Control Failure
1 Red
Flame present with gas off
Check pressure switch wiring
2 Red
Vent OR termination problem
3 Red
4 Red
Airflow problem OR open fuse
5 Red
Flame Rollout OR open fuse
6 Red
Repeated 3 Red
7 Red
Failed to light burners
8 Red
Loss of flame during call for heat
Hot/Neutral reversed OR poor
9 Red
ground/neutral
10 Red
Gas valve shorted "ON"
11 Red
Check blower motor/wiring
13 Red
Vent OR termination problem
Fault Code Retrieval
Notice - Only a qualified service technician should use this feature.
Fault code retrieval functions will work only if there are no active thermostat signals.
To retrieve fault codes, push and release ERROR button on control board. The LED will flash the
last five error codes, beginning with the most recent. If there are no fault codes in memory, the LED
will give two green flashes. To clear the fault code memory, push and hold the ERROR button for
at least five seconds. The LED will give three green flashes when the memory has been cleared.
5402847-UIM-A-0917
PRECAUTION
OUVREZ LES DISJONCTEURS AVANT
DE PROCEDER AVEC LE SERVICE
115VAC NEUT.
115VAC LINE
YEL
WHT
BLK
YEL
PS2
WHT
C
NO
ORG
BLK
PS1
ROS2
ROS1
LS
C
RED
RED
RED/BLK
RED/GRN
PUR
FLAME SENSOR
Legend
DS -
Door switch
ROS -
Rollout switch
XFMR -
Transformer
HSI -
Hot surface igniter
PF-
Power factor choke
PS1 -
Pressure switch, 1 stage
PS2 -
Pressure switch, 2 stage
IDM -
Inducer motor
EAC -
Electronic air cleaner
LS -
Limit switch
HUM -
Humidifier
Legende
Commutateur de porte
DS -
Commutateur de roulement
ROS -
XFMR -
Transformeur
HSI -
Ignition de surface chaud
PF -
Transformeur de facteur
de puissance
Commutateur de pression,
PS1 -
premier stage
Commutateur de pression,
PS2-
deuxieme stage
IDM-
D'induct moteur
EAC-
Filtre électrique
Commutateur de limite
LS -
Humidificateur
HUM -
1034865-UWD-A-0413
M
GAS VALVE
C
HI
NO
31
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