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59SU5A: Installation, Start-up, Operating and Service Maintenance Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
58
345785-2 rev B
A200235
Fig. 68 – Wiring Diagram
NOTES:
CONNECTION DIAGRAM
JUNCTION
UNMARKED TERMINAL
PCB CONTROL TERMINAL
FACTORY WIRING (115VAC)
FACTORY WIRING (24VAC)
FIELD WIRING (115VAC)
FIELD WIRING (24VAC)
CONDUCTOR ON CONTROL PCB
FIELD WIRING SCREW TERMINAL
FIELD EARTH GROUND
EQUIPMENT GROUND
FIELD SPLICE
PLUG RECEPTACLE
NOTES:
SCHEMATIC DIAGRAM
IDM
NOTE #3
GV
PL1-1
GND
12VDC
SIG
NOTE #2
GVR-1
FUSE
N
N
N
N
N
TO 115VAC FIELD DISCONNECT
EQUIPMENT GROUND
L1
L1
ILK
PL14
HSI
2
1
PL2
1
HSIR
2
BLWM
LO
MED LO
MED
MED HI
HI
BHT/CLR
SPARE-1
SPARE-2
FAN
HEAT
COOL
BFANR
BLWR
EACR
HUMR
BL
HUM 115VAC
EAC-1
EAC-2
PR
115VAC
TRAN
24VAC
SEC-1
SEC-2
NOTE #6
PL1-6
LS
PL1-8
PL1-2
PL1-4
PL1-3
GVR-2
24VAC
HUM
R
W
Y
G
C
CPU
PL1-10
FS
PL3-1
PL1-5
COM
PL16
PL15
1
2
3
4
5
C
L
G
N
HUMR
PCB
NOTE #5
PL1-7
PL1-9
PL1-11
RPM
PWM
15VDC
NOTE #5
PCB
CPU
IND
NOTE #7&15
PL12
PTD
1
2
3
PL3-2
PL3-3
(SEE NOTE #13)
1. If any of the original equipment wire is replaced use wire rated for 105ºC.
2. Use only copper wire between the disconnect switch and the furnace junction box (JB).
3. This wire must be connected to furnace sheet metal for control to prove flame.
4. Symbols are electrical representation only.
5. Solid lines inside PCB are printed circuit board conductors and are not included in legend.
6. Replace only with a 3 amp fuse.
7. Inducer (IDM) motor contains internal auto-reset thermal overload switches (OL).
8. Blower motor speed selections are for average conditions, see installation instructions for
details on optimum speed selection.
9. Ignition-lockout will occur after four consecutive unsuccessful trials-for-ignition. Control
will auto-reset after three hours.
10. Blower-on delay: gas heating 25 seconds, cooling or heat pump 2 seconds.
11. Blower-off delay: gas heating selections are 90, 120, 150 or 180 seconds, cooling or heat
pump 90 seconds.
12. BLWM is locked - rotor overload protected by redundant electronic control circuits.
13. J15 and J16 not available on all motors. Blower motor (BLWM) leads may be
hardwired at motor.
14. Some motors may use black instead of gray for COOL motor tap (Hi Speed).
15. Inductor not used on all models.
PL3
PTD
PL12
R
G
BK
2
3
1
BL
NOTE #3
GV
R/Y
R
LS
PL1
W
1
1
2
3
PL13
G
Y
O
BK
W
IDM
15VDC SUPPLY
PWM SIGNAL
RPM
115 VAC
NEUTRAL
PR
R
115VAC
24VAC
TRAN
N
BL
N
L1
GND
SSU
FU2
JB
ILK
W
W
W W
PL7
PL7
W
IND
NOTE
7.15
FLAME
SENSOR
PL18
L1
K
B
G R
1
R
PL2
IND
HSI
1
HUM
115VAC
PL11
HSI
NEUTRAL-L2
PL14
BK
BL
PR
G C W Y R
SEE RATING PLATE FOR MODEL PLUG USE
1
2
BLWM
G
N
L
C
RED
ORANGE
YELLOW
GRAY
PL16
PL15
BLUE
1
2
3
4
5
COM
HEAT
COOL
FAN
SPARE1
SPARE2
24V MTR TAPS
GN BL G
R Y
O
EAC-2
FUSE 3-AMP
HEAT BLOWER
OFF-DELAY
J1
PL4
MODEL
PLUG
24VAC
HUM
SEC-2
SEC-1
EAC-1
1-AMP@115 VAC
BK
BK
STATUS
CODE
J2
COOL BLOWER
OFF-DELAY
(SEE NOTE #13)
PL17
Y
O
BTS
PL19
1
2
3
GRN/Y
BK
PL11
1
2
3
1
2
3
PL13
BTS
R
G
BK
G
GROUND
BK
L1 BLOWER POWER
BLOWER MOTOR (ECM)
BURNER THERMAL SWITCH
MICROPROCESSOR AND
CIRCUITRY
ELECTRONIC AIR CLEANER
CONNECTION
FUSE OR CIRCUIT BREAKER
CURRENT INTERRUPT DEVICE
(FIELD INSTALLED & SUPPLIED)
FLAME SENSOR
EQUIPMENT GROUND
GAS VALVE-REDUNDANT
GAS VALVE RELAY, DPST-(N.O.)
HOT SURFACE IGNITER (115 VAC)
HOT SURFACE IGNITER RELAY,
SPST-(N.O.)
24VAC HUMIDIFIER CONNECTION
115VAC HUMIDIFIER CONNECTION
INDUCED DRAFT MOTOR, ECM
BLOWER ACCESS PANEL
INTERLOCK SWITCH, SPST-(N.O.)
JUNCTION BOX
HEAT OFF DELAY JUMPER
COOL OFF DELAY JUMPER
BL
BLWM
BTS
CPU
EAC
FU2
FS
GND
GV
GVR
HSI
HSIR
24 VAC HUM
HUM 115VAC
IDM
ILK
JB
J1
J2
LS
LED
LIMIT SWITCH, AUTO-RESET,
SPST (N.C.)
LIGHT-EMITTING DIODE
FOR STATUS CODES-AMBER
11-CIRCUIT CONNECTOR
PL1
INDUCER / IGNITER CONNECTOR
PL2
TRANSDUCER CONNECTOR
PL3
5-CIRCUIT TERMINAL BLOCK
1-CIRCUIT CONNECTOR
MODEL PLUG CONNECTOR
3-CIRCUIT CONNECTOR
P5
PL7, PL18
PL4
PL11,12,13
PL14,17,19
PL15
PL16
PCB
PTD
PR
SSU
2-CIRCUIT CONNECTOR
4-CIRCUIT BLWM POWER
CONNECTOR
5-CIRCUIT BLWM SPEED
TAP CONNECTOR
PRINTED CIRCUIT BOARD
CONTROL
PRESSURE TRANSDUCER
TRANSFORMER 115V
SAFETY SWITCH
(FIELD SUPPLIED)
PL17
PL19