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→ Fig. 11—Unit Wiring Diagram
A01365
LEGEND
ALS1 AUXILIARY LIMIT SWITCH, OVERTEMP. MANUAL RESET, SPST (N.C.)
ALS2 AUXILIARY LIMIT SWITCH, OVERTEMP. AUTO RESET, SPST (N.C.)
BHI / LOR BLOWER MOTOR SPEED CHANGE RELAY, SPDT
BHT / CLR BLOWER MOTOR SPEED CHANGE RELAY, SPDT
BLWM BLOWER MOTOR, 4 or 5 -SPEED, PERMANENT-SPLIT-CAPACITOR
BLWR BLOWER MOTOR RELAY, SPST (N.O.)
CAP CAPACITOR
CPU MICROPROCESSOR AND CIRCUITRY
DSS DRAFT SAFEGUARD SWITCH (N.C.)
EAC-1 ELECTRONIC AIR CLEANER CONNECTION (115 VAC, 1 AMP MAX.)
EAC-2 ELECTRONIC AIR CLEANER CONNECTION (COMMON)
FRS1 FLAME ROLLOUT SWITCH OVERTEMP. MANUAL RESET, SPST (N.C.)
FRS2 FLAME ROLLOUT SWITCH OVERTEMP. MANUAL RESET, SPST (N.C.)
FSE FLAME-PROVING SENSOR ELECTRODE
FU1 FUSE, 3 AMP, AUTOMOTIVE BLADE TYPE, FACTORY INSTALLED
FU2 FUSE, FIELD INSTALLED
GV GAS VALVE, REDUNDANT LOW-HEAT OPERATORS, 2-STAGE
HPS HIGH-HEAT PRESSURE SWITCH, SPST (N.O.)
HPSR HIGH-HEAT PRESSURE SWITCH RELAY, SPST (N.C.)
HSI HOT-SURFACE IGNITER (115 VAC)
HSIR HOT-SURFACE IGNITOR RELAY, SPST (N.O.)
HUM 24VAC HUMIDIFIER CONNECTION (0.5 AMP. MAX.)
IDM INDUCED DRAFT MOTOR, 2-SPEED, SHADED-POLE
IDR INDUCER MOTOR RELAY, SPST (N.O.)
IHI / LOR INDUCER MOTOR SPEED CHANGE RELAY, SPDT
ILK BLOWER DOOR INTERLOCK SWITCH, SPST (N.O.)
JB JUNCTION BOX
LED LIGHT-EMITTING DIODE FOR STATUS CODES
LGPS LOW GAS-PRESSURE SWITCH, SPST (N.O.)
LPS LOW-HEAT PRESSURE SWITCH, SPST (N.O.)
LS LIMIT SWITCH, OVERTEMPERATURE-AUTO RESET, SPST (N.C.)
MGVR MAIN GAS VALVE RELAY, DPST (N.O.)
-
1 = VALVE
-
2 = HUMIDIFIER
PL1 12-CIRCUIT CONNECTOR
PL2 9-CIRCUIT CONNECTOR
PL3 3-CIRCUIT IDM CONNECTOR
PL6 2-CIRCUIT HSI CONNECTOR
SW1 HIGH-HEAT-ONLY SWITCH, SPST (MANUAL)
*
SW2 LOW-HEAT-ONLY SWITCH, SPST (MANUAL)
*
SW3 & 4 BLOWER-OFF DELAY SETTING SWITCHES,
SPST (MANUAL)
*
TJ TWINNING JUMPER, SPDT FOR MAIN OR
SECONDARY STATUS (MANUAL CHANGE OVER)
TRAN TRANSFORMER-115VAC/24VAC
TWIN/TEST 1-CIRCUIT TWINNING BUSS CONNECTOR,
ALSO STATUS CODE RECALL
JUNCTION
TERMINAL
CONTROL TERMINAL
FACTORY POWER WIRING (115VAC)
FACTORY CONTROL WIRING (24VAC)
FIELD POWER WIRING (115VAC)
FIELD CONTROL WIRING (24VAC)
CONDUCTOR ON CONTROL
FIELD WIRING SCREW TERMINAL
FIELD GROUND
EQUIPMENT GROUND
FIELD SPLICE
PLUG RECEPTACLE
NOTES:
1. Use only copper wire between the disconnect switch and
the unit.
2. If any of the original wire, as supplied, must be replaced,
use the same or equivalent type wire.
3. Inducer (IDM) and blower (BLWM) motors contain
internal auto-reset thermal overload switches.
4. Blower motor speed selections are for average
conditions. See Installation Instructions for details on
optimum speed selection.
5. Replace only with a 3-AMP fuse.
6. Auxiliary limit switches (ALS1 & 2) used on some
horizontal and some downflow models.
7. This wire must be connected to furnace sheet metal for
control to prove flame.
8. Factory connected when LGPS not used.
RED
LS
FRS2
FRS1
(WHEN USED)
ALS1
DSS
ORN
LGPS
YEL
NOTE #8
LPS
NOTE #8
(WHEN USED)
(WHEN USED)
NOTE #6
ALS2
SWITCH
12
HEAT
SET-UP
SWITCH
NORM
HI HT
LO HT
*
ON
OFF
OFF
ON
BLOWER-
OFF DELAY
(SEC.)
SWITCH
3
4
90 SEC
135 SEC
*
180 SEC
225 SEC
ON
OFF
OFF
ON
2-STAGE
FURNACE
CONTROL
FACTORY
SETTINGS
1
2
34
ON
OFF
3
2
1
BLU
BLOWER-OFF DELAY
BLOWER-OFF DELAY
LOW-HEAT ONLY
HIGH-HEAT ONLY
*
W2 Com
24V
W/W1 Y/Y2 R G HUM
LED
S
M
TJ
TWIN
TEST
12
11 10
P1
WHT
321
9
87
FSE
HPS
HI
P
M
IDM
HSI
ILK
JB
L1
PL6
12
123
PL3
PL2
PR1 PR2
L1 L2
COMMON
HI-COOL
HI-GAS
HEAT
EAC-2
EAC-1
LO-GAS
HEAT
SPARE
SEC1
FU1
SEC2
NOTE #4
BLWM
BRN
BRN
CAP
TRAN
GV
C
FUSED DISCONNECT
SWITCH (WHEN REQ’D)
NOTE #1
BLK
WHT
GND
L2
FU2
CONNECTION DIAGRAM
L1
BLWR
TO 115VAC FIELD
DISCONNECT SWITCH
NOTE #1
LO-GAS-HEAT
HI-GAS-HEAT
SPARE
NOTE #4
COMMON
HSIR
EAC-1
EAC-2
3
1
HSI
2
9
PL2
PR2
115VAC
PR1
TRAN
24VAC
IDR
L2
ILK
IDM
BLWM
BHI / LOR
BHT / CLR
CAP
BRN
BRN
PL6
IHI / LOR
SEC1
FU1
NOTE #5
1
2
3
HI
COM
HPSR
1
5
6
2
N/A
N/A
HI-COOL
PL3
4
7
SEC2
8
LS
ALS1
DSS
ALS2
FRS1
(WHEN USED)
FRS2
N/A
12
2
3
MGVR-2
9
6
NOTE #8 LPS
(WHEN USED)
TWIN
TEST
S
M
W/W1
R
HUM
TWINNING
JUMPER
TJ
W2
Y/Y2
G
MGVR-1
NOTE #8
HPS
5
4
1
10
7
8
N/A
N/A
FSE
11
HI
M
P
C
NOTE#7
PL1
CPU
LGPS
LO
SW1
GV
ORN
SW4
SW3
SW2
C
OM
9. Symbols are an electrical representation only.
10. BLOWER-ON DELAY: Gas heating 45 seconds,
Cooling/Heat Pump 2 seconds.
11. Cooling/Heat Pump BLOWER-OFF DELAY is 90
seconds.
12. IGNITION-LOCKOUT will occur after four
consecutive unsuccessful trials-for-ignition.
Control will automatically reset after three hours.
13. Control must be grounded at pin 10 of 12-pin
connector.
14. NA - Not Applicable
15. Spare terminal and wire not available on some
applications. Insulate connector if not available.
RED
LO
RED
MED LO
BLU
COM WHT
BLK
HI
YELMED HI
MED
COM
HIMED
MED LO
LO
NOTE #15
ORN
SPARE
MED HI
SPARE
BLU
NOTE #15
324459-101 REV. D
WHT
BLK
BLU
BRN
GRY
BRN
GRY
WHT
WHT
RED
WHT
WHT
BLK
RED
BLK
YEL
YEL
BRN
GRY
BLU
ORN
ORN
ORN
RED
RED
RED
WHT
BLK
BLK
BLK
BLK
WHT
BLU
RED
RED
RED
(NATURAL GAS & PROPANE)SCHEMATIC DIAGRAM
EQUIPMENT
GROUND
GRN/YEL
GRN/YEL
GRN/YEL
GRN/YEL
GRN/YEL
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