Fig.
11—Connection
Diagram
for
Twinned
2-Stage
PSC
Furnaces
A94167
S
MAKE NO THERMOSTAT CONNECTIONS
TO RIGHT HAND FURNACE.
MAKE THERMOSTAT CONNECTIONS
TO ONLY THE LEFT HAND FURNACE.
HEAT
SET-UP
SWITCH
OFF
OFF
ON
ON
OFF
OFF
ON
ON
90 SEC
SWITCH
SWITCH
2
4
1
3
135 SEC
180 SEC
225 SEC
BLOWER-
OFF DELAY
(SEC.)
NORM
HI HT
LO HT
TKR
SLAVE OR RH FURNACE
ORN
BLU
BLU
RED
RED
YEL
ORN
ORN
BLK
BLK
BLK
BLK
WHT
WHT
WHT
KEEP TWINNING JUMPER
IN "MASTER" POSITION
ON MASTER FURNACE.
MOVE TWINNING JUMPER TO "SLAVE"
POSITION ON SLAVE FURNACE.
PL8
22
11
ALS-S
ILK-1
ALS-M
4
2
1
3
PL9
PL7
12
ILK
JB
WHT
BLK
GRN
L1
L2
GRN
FU2
FUSED DISCONNECT
SWITCH (WHEN REQ'D)
NOTE #1
NOTE#6
RED
BLK
WHT
WHT
IDM
PL3
2
13
PL6
12
HSI
TRAN
NOTE#7
NOTE#7
(WHEN USED)
LPS
LGPS
YEL
DSS
1
YEL
ORN
WHT
WHT
BRN
GRY
GRN
BLU
GRY
RED
BLK
WHT
BLK
BLK
WHT
WHT
BLK
BLU
RED
BLK
WHT
BLK
PL4
FSE
NOTE#4
BLWM
BRN
BRN
YEL
WHT
RED
RED
ORN
YEL
PL2
BLK
BLU
BLU
RED
(LO)
(MED LO)
(MED HI)
(HI)
(COM)
FURNACE CONNECTION DIAGRAM
GV
BLK
WHT
P
HI
HPS
M
C
GRN
GRN
GRN
BLU
BRN
BRN
GRY
COMMON
EAC-1
EAC-2
HI-COOL
PR1
PR2
SEC2
PARK
HI-GAS
LO-GAS
HEAT
HEAT
L1
L2
SEC1
FU1
FURNACE
CONTROL
CPU
W/W1
W2
Y/Y2
Com 24V
R
G
HUM
CAP
TEST
TWIN
LED
M
S
P1
TJ
1
1
7
10
11
12
3
3
9
2
2
8
LIMIT SWITCH, OVERTEMPERATURE-AUTO RESET,
SPST-(N.O.)
12-CIRCUIT CONNECTOR
9-CIRCUIT CONNECTOR
3-CIRCUIT IDM CONNECTOR
1-CIRCUIT FPS CONNECTOR
2-CIRCUIT HSI CONNECTOR
2-CIRCUIT LINE/NEUTRAL CONNECTOR
2-CIRCUIT TWINNING CONNECTOR
1-CIRCUIT TWINNING CONNECTOR
HIGH-HEAT-ONLY SWITCH, SPST-(MANUAL)
LOW-HEAT-ONLY SWITCH, SPST-(MANUAL)
BLOWER-OFF DELAY SETTING SWITCHES,
SPST-(MANUAL)
TWINNING JUMPER, SPDT FOR MASTER OR
SLAVE STATUS-(MANUAL CHANGE-OVER)
TWINNING KIT RELAY, SPST-(N.O.)
TRANSFORMER-115VAC/24VAC
1-CIRCUIT TWINNING BUSS CONNECTOR,
ALSO COMPONENT TEST.
LS
PL1
PL2
PL3
PL4
PL6
PL7
PL8
PL9
SW1
SW2
SW3 & 4
TJ
TKR
TRAN
TWIN/TEST
MASTER AUX. LIMIT SWITCH, OVERTEMP.- MANUAL RESET, SPST-(N.C.)
SLAVE AUX. LIMIT SWITCH, OVERTEMP.- MANUAL RESET, SPST-(N.C.)
BLOWER MOTOR, 4-SPEED, PERMANENT-SPLIT-CAPACITOR
CAPACITOR
MICROPROCESSOR AND CIRCUITRY
DRAFT SAFEGUARD SWITCH
ELECTRONIC AIR CLEANER CONNECTION (115 VAC 1 AMP MAX.)
ELECTRONIC AIR CLEANER CONNECTION (COMMON)
FLAME ROLLOUT SWITCH OVERTEMP.-MANUAL RESET, SPST-(N.C.)
FLAME ROLLOUT SWITCH OVERTEMP.-MANUAL RESET, SPST-(N.C.)
FLAME-PROVING SENSOR ELECTRODE
FUSE, 3 AMP, AUTOMOTIVE BLADE TYPE, FACTORY INSTALLED
FUSE, FIELD INSTALLED
GAS VALVE-REDUNDANT LOW-HEAT OPERATORS, 2-STAGE
HIGH-HEAT PRESSURE SWITCH, SPST-(N.O.)
HIGH-HEAT PRESSURE SWITCH RELAY, SPST-(N.C.)
HOT-SURFACE IGNITER (115 VAC)
24VAC HUMIDIFIER CONNECTION (.5 AMP. MAX.)
INDUCED DRAFT MOTOR, 2-SPEED, SHADED-POLE
SLAVE AUX. BLOWER DOOR INTERLOCK SWITCH, SPST-(N.O.)
BLOWER DOOR INTERLOCK SWITCH, SPST-(N.O.)
JUNCTION BOX
LIGHT-EMITTING DIODE FOR STATUS CODES
LOW GAS-PRESSURE SWITCH, SPST-(N.O.)
LOW-HEAT PRESSURE SWITCH, SPST-(N.O.)
ALS-M
ALS-S
BLWM
CAP
CPU
DSS
EAC-1
EAC-2
FRS1
FRS2
FSE
FU1
FU2
GV
HPS
HPSR
HSI
HUM
IDM
ILK-1
ILK
JB
LED
LGPS
LPS
LEGEND
COMPONENT TEST
To initiate the component test sequence with no thermostat inputs and with all inducer Post-Purge and
Blower-Off Delay periods completed, short the `TWIN/TEST' terminal to the "C
OM
"
terminal for about two
seconds. The control will turn ON the inducer motor Low-Speed, inducer motor High-Speed, HSI, blower
motor Low-Gas-Heat Speed, blower motor High-Gas-Heat Speed, and blower motor High-Cool Speed for
7-15 seconds each. Neither the gas valve nor the humidifier will be turned ON.
NOTES:
USE ONLY COPPER WIRE BETWEEN THE DISCONNECT SWITCH AND THE UNIT.
IF ANY OF THE ORIGINAL WIRE, AS SUPPLIED, MUST BE REPLACED, USE
THE SAME OR EQUIVALENT TYPE WIRE.
INDUCER (IDM) AND BLOWER (BLWM) MOTORS CONTAIN INTERNAL AUTO-RESET
THERMAL OVERLOAD SWITCHES.
BLOWER MOTOR SPEED SELECTIONS ARE FOR AVERAGE CONDITIONS.
SEE INSTALLATION INSTRUCTIONS FOR DETAILS ON OPTIMUM SPEED SELECTION.
REPLACE ONLY WITH A 3-AMP FUSE.
THIS WIRE MUST BE CONNECTED TO FURNACE SHEET METAL FOR CONTROL TO
PROVE FLAME.
FACTORY CONNECTED WHEN LGPS NOT USED.
SYMBOLS ARE AN ELECTRICAL REPRESENTATION ONLY.
BLOWER-ON DELAY: GAS HEATING 45 SECONDS, COOLING OR HEAT PUMP 2 SECONDS.
BLOWER-OFF DELAY: GAS HEATING 90, 135, 180, OR 225 SECONDS, COOLING OR
HEAT PUMP 90 SECONDS.
IGNITION-LOCKOUT WILL OCCUR AFTER FOUR CONSECUTIVE UNSUCCESSFUL
TRIALS-FOR-IGNITION. CONTROL WILL AUTOMATICALLY RESET AFTER THREE
HOURS.
CONTROL MUST BE GROUNDED AT PIN 10 OF 12-PIN CONNECTOR.
NOT USED WITH SINGLE-STAGE THERMOSTAT ADAPTIVE MODE (3 WIRES AND TKR).
MASTER OR LH FURNACE
LS
FRS2
FRS1
(WHEN USED)
RED
RED
RED
RED
ORN
322031-401 REV. C
PASSES THROUGH
HOLES IN CASINGS
YEL
4
1
SW
2
3
BLOWER-OFF DELAY
BLOWER-OFF DELAY
LOW-HEAT ONLY
HIGH-HEAT ONLY
OFF
ON
FACTORY
SETTING
PL7
12
ILK
JB
WHT
BLK
GRN
L1
L2
GRN
FU2
FUSED DISCONNECT
SWITCH (WHEN REQ'D)
NOTE#1
NOTE#6
RED
BLK
WHT
WHT
IDM
PL3
2
13
PL6
12
HSI
TRAN
NOTE#7
NOTE#7
(WHEN USED)
LPS
LGPS
YEL
DSS
1
YEL
ORN
WHT
WHT
BRN
GRY
GRN
BLU
GRY
RED
BLK
WHT
BLK
BLK
WHT
WHT
BLK
BLU
RED
BLK
WHT
BLK
PL4
FSE
NOTE#4
BLWM
BRN
BRN
YEL
WHT
RED
RED
ORN
YEL
PL2
BLK
BLU
RED
BLU
RED
(LO)
(MED LO)
(MED HI)
(HI)
(COM)
GV
BLK
WHT
P
HI
HPS
M
C
GRN
GRN
GRN
BLU
BRN
BRN
GRY
COMMON
EAC-1
EAC-2
HI-COOL
PR1
PR2
SEC2
PARK
HI-GAS
LO-GAS
HEAT
HEAT
L1
L2
SEC1
FU1
FURNACE
CONTROL
CPU
W/W1
W2
Y/Y2
Com 24V
R
G
HUM
CAP
TEST
TWIN
LED
M
P1
TJ
1
1
7
10
11
12
3
3
9
2
2
8
LS
FRS2
FRS1
(WHEN USED)
RED
RED
RED
RED
ORN
JUNCTION
TERMINAL
CONTROL TERMINAL
FACTORY POWER WIRING (115VAC)
FACTORY CONTROL WIRING (24VAC)
FIELD POWER WIRING (115VAC)
FIELD CONTROL WIRING (24VAC)
FIELD ACCESSORY WIRING (24 VAC)
CONDUCTOR ON CONTROL
FIELD WIRING SCREW TERMINAL
FIELD GROUND
EQUIPMENT GROUND
FIELD SPLICE
PLUG RECEPTACLE
4
1
SW
2
3
BLOWER-OFF DELAY
BLOWER-OFF DELAY
LOW-HEAT ONLY
HIGH-HEAT ONLY
OFF
ON
FACTORY
SETTING
*
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
ORN
*
*
* * *
—44—
