Trane S8B1A040M3PSC Installation, Operation And Maintenance Manual page 19

NOTES:
1. IF ANY OF THE ORIGINAL WIRING AS SUPPLIED WITH THIS FURNACE MUST BE REPLACED, IT MUST BE WITH WIRE HAVING A TEMPERATURE RATING OF AT
LEAST 105°C. WIRES 12, 18, 48, 49, 50, 51, 92, 93, AND 94 REQUIRE A TEMPERATURE RATING OF AT LEAST 250°C.
2. FOR PROPER AIRFLOW IN COOLING/HEAT PUMP MODES, Y1AND/OR Y2 MUST CONNECT FROM THE THERMOSTAT TO THE IFC LOW VOLTAGE TERMINAL STRIP.
3. FOR COOLING ONLY SYSTEMS, LEAVE Y1-O JUMPER IN PLACE ON THE IFC FOR CORRECT LED READOUT.
4. FOR HEAT PUMP SYSTEMS, REMOVE THE Y1-O JUMPER, CONNECT "O" FROM THE THERMOSTAT TO "O" ON THE IFC LOW VOLTAGE TERMINAL
STRIP FOR CORRECT LED READOUT.
5. IF USING A SINGLE STAGE HEATING THERMOSTAT, JUMPER W1 AND W2 TERMINALS AT THE LOW VOLTAGE TERMINAL STRIP. HT2 WILL
BE SHOWN ON THE SEVEN SEGMENT DISPLAY AT ALL TIMES. SECOND STAGE OPERATION WILL BEGIN AFTER THE INTERSTAGE DELAY HAS COMPLETED.
6. AIRFLOW TABLES ARE LOCATED IN THE IOM. TO CHANGE AIRFLOW, REFER TO THE INTEGRATED FURNACE CONTROL MENU AND OPTIONS
TO SET AIRFLOW AND BLOWER DELAYS.
7. LINE CHOKE AND WIRE BK/28 ONLY USED ON MODELS WITH 1 HP MOTORS.
8. WIRE YL/45 AND RAF-2 ARE NOT PRESENT ON DOWNFLOW MODELS.
9. FLAME SENSE TEST PADS: 1 VDC = 1 MICROAMP. FLAME CURRENT CAN VARY DEPENDING ON THE VOM THAT
IS USED AND THE VOLTAGE SUPPLIED TO THE FURNACE. THE ACCEPTABLE RANGE IS 0.75-3 MICROAMPS.
S8X2
PS2 PS1
GAS
VALVE
1 2 3
TNS
BL/2 WH/15
24v 120v
RD/6 BK/14
SEE NOTE 7
LINE CHOKE
BK/28
BK/27
3 2
EAC HUM LINE
3 2
24 / 120 VAC
MAY BE USED
SEE NOTE 9
FP
FP
12
BR/53 HLI
11
BR/10 10 MVH
RD/9 9 MVL
8 GND
BR/7 7 PS2
MENU OPTION
RD/6 6 TH
BL/5
5 MVC
YL/52 HLO
4
OR/11 3 PS1
BL/2 2 TR
1 ILI (NOT USED)
FLAME_PROBE
WH/12
IFC
LINE
FACTORY
W2 W1 R G B/C Y2 Y1 O
24 V WIRING
BK BLACK
LINE
SEE NOTES 2, 3, 4, 5
FIELD
WH WHITE
WIRING
24 V
PS PRESSURE
YL YELLOW
SWITCH
OR ORANGE
GR GREEN
IGN HOT SURFACE
FUSE
BR BROWN IGNITER
RD RED
RAF REVERSE
LC LINE CHOKE
BL BLUE
AIR FLOW
2 Stage Inducer with CTM Blower Motor
** INTERNAL THERMAL PROTECTION
Status Codes Heat Off Delay (sec)
H O d
Idle Inter-Stage Delay
IdL s I d
1st Stage Heating
Ht1 Blower Tap for 1st Stage
C O P C1
.
Compressor Mode
2nd Stage Heating
Ht2
Blower Tap Number Blower Tap for 2nd Stage
tP C . 2
.
Compressor Mode
Continuous Fan
COF
H1
1st Stage Cooling . Blower Tap for 1st Stage Heating
CL1 HtP
2nd Stage Cooling H . 2 Blower Tap for 2nd dtage Heating
CL2
.
1st Stage Heat Pump r U n
HP1 Run Test Mode
2nd Stage Heat Pump Error Codes
HP2
Defrost Mode Loss of IRQ or internal failures
dft E01
Menu Options
Retry exceeded (Failed to est flame)
E21
.
Orientation
Orn Recycles exceeded (loss of established
E2 2
.
Active Alarm Menu flame or PS open x10)
Err
Last 6 Faults (To Clear,
L6F E2 3 1st Stage Gas Valve not energized when it
.
Hold Option Button 5 sec) should be exceeded after 10 times
Code Release Numbe r
Cr E3 1 Shorted Pressure Switch, 1st Stage
.
Cooling Off Delay (sec)
COd Open Pressure Switch, 1st Stage
E3 2
.
Outdoor Unit Type Shorted Pressure Switch, 2nd Stage
OdU E3 3
.
S8XB-SVX001-1B-EN
FLAME_ROLLOUT1
YL/50
YL/47 YL/48
1
1
FLAME_ROLLOUT2
YL/46 YL/49
2
2
YL/50
TO BURNER
RAF-1
BOX HARN
YL/45
THERMAL_LIMIT
*SEE NOTE
YL/49
8
RAF-2
BLOWER
HOUSING
YL/45
GND
COM
BK/39 1 L
BLOWER
2 G
MOTOR
WH/40
3 N
YL/WH/36
BL/WH/37
BK/WH/38
OR/WH/55
120v 60 Hz. 1 PH
1 2 3 4 5 6 7 8 9 10 11 12 POWER SUPPLY PER LOCAL CODE
1 2 3 4 5 6 7 8 9 10 11 12 JUNCTION BOX
X
BK/30 BK/13
2 2
1 BK/29
1
PANEL LOOP
WH/17
1
4 3 2 1 BUTT SPLICE-WITH HEAT SHRINK
SEE NOTE 1
NEUTRAL
1
1 S1 2
1
4 3 2 1
S3 2
1 2
3
1 S2 2
BUTT SPLICE-WITH HEAT SHRINK
SEE NOTE 1
IGN-N 5 WH/21 WH/21
WH/20 BK/22
IND-N 4
IND-LO RD/19
3
IND-HI BK/18
2
IGN-H BK/22
1
RD/WH/23
TAP1 1
YL/WH/24
TAP2 2
BL/WH/25
TAP3 3
BK/WH/26 INTEGRATED FURNACE CONTROL
4
TAP4
OR/WH/56
5
TAP5 ELECTRICAL RATING
BL/57 INPUT: 24 VAC, 60 HZ.
6
GND
H LINE TNS SEC. CURRENT: 450 MA.
N NEUTRAL + MV LOAD
GND GROUND MV OUTPUT: 1.5A @ 24 VAC
HLO HIGH LIMIT OUTPUT IND OUTPUT: 2.2 FLA, 3.5 LRA
HLI HIGH LIMIT INPUT @ 120 VAC
PS1 1ST STAGE PRESSURE IGN OUTPUT: 2.0 A @ 120 VAC
INPUT CIRC. BLOWER OUTPUT: 14.5 FLA,
PS2 2ND STAGE PRESSURE 25 LRA @ 120 VAC
INPUT HUMIDIFIER @& AIR CLEANER
IND INDUCER (DRY CONTACTS)
IFC INTEGRATED FURNACE MAX. LOAD: 1.0 A @ 120 VAC
CONTROL 24 VAC OR 120 VAC MAY BE USED
THERMOSTAT
RAF REVERSE AIR FLOW FUSE: 5A
TH 24VAC (HOT)
TR 24VAC (COMMON) TIMINGS
FRS FLAME
MVC VALVE COMMON PREPURGE: 0 SEC.
ROLLOUT SWITCH
MVL VALVE LOW STAGE INTERPURGE: 60 SEC.
MVH VALVE HIGH STAGE POST PURGE: 5 SEC.
TNS TRANSFORMER IGN WARMUP: 20 SEC.
FP FLAME PROBE
ILI INDUCER LIMIT INPUT IAP: 3; TFI: 5 SEC.
IGN IGNITER RETRIES: 2 RECYCLES: 10
FP FLAME PROBE HEAT ON DELAY: 30 SEC.
GROUND
HI SECOND STAGE COOL ON DELAY: 0 SEC.
LO FIRST STAGE AUTO RESTART: 60 MIN.
AUTO RESTART PURGE: 60 SEC.
Open Pressure Switch, 2nd Stage
E3 4
.
Open Thermal Limit, Rollout Switch, or Reverse Airflow Switch
E04
E05 Flame detected, should not be present
Voltage reversed polarity
E6 1
.
Bad Grounding
E6 2
.
(1) Igniter relay fails
E6 3
.
(2) Igniter open
1st stage gas valve (MVL) is energized when it should be of f
E7 1
.
E08 Flame current is low, but still strong enough to allow operation
Open Inducer Limit Switch or Condensate Switch
E09
(1) 1st stage gas valve not energized when it should be
E11
(2) 1st stage gas valve relay stuck closed
(3) 2nd stage gas valve relay stuck closed
(4) 2nd stage gas valve energized
when it should not be
(5) 2nd stage gas valve not energized
when it should be
Open fuse
E12
120v 60 Hz. 1 PH
POWER SUPPLY PER LOCAL CODE
JUNCTION BOX
GND
YL/48
YL/51
IFC
3
LINE-H
YL/51 2
CIRC-H
1
TNS-H
BL/42
6
4
5 TNS-N
4
3
CIRC-N
3
2
1
LINE-N 1
1
IGN-H
2
IND-HI
3
IND-LO
4
IND-N
5
IGN-N
H N
GND
1
TAP1
TAP2 2
X X X
3
TAP3
4
TAP4
5
TAP5
6
GND
1
ILI
2
TR
3
PS1
4
HLO
5
MVC
6
TH
7
VENT PS2
MOTOR
8
(INDUCER) GND
**
9
MVL
10
MVH
11
1 HLI
2
12
FP
IGN
W2 W1 R G B/C Y2 Y1 O
THERMOSTAT
FLAME_ROLLOUT2
YL
RAF-2
YL
YL
FLAME_ROLLOUT1
YL
D345847P01 REV E
W W i i r r i i n n g g D D i i a a g g r r a a m m s s
H N
LINE CHOKE
PANEL LOOP
BK BK
1 1
BK
2 2
BK
BK
BK
WH
WH
WH
VENT
BK 1
MOTOR
BK 2
(INDUCER)
RD 3
**
WH
IGN
WH WH
BK
RD/WH RD/WH
YL/WH
BL/WH
BK/WH
OR/WH
BL
TNS
BL
OR
24v
YL
BL
RD
BR
GR
RD RD
BR BL
BR BR
WH
BR
YL
THERMAL_LIMIT
YL
RAF-1
YL
DEFAULT BLOWER MOTOR TAP SELECTIONS
COF (CONSTANT FAN): TAP 1
CL1 (FIRST STAGE COOLING): TAP 3
CL2 (SECOND STAGE COOLING): TAP 7
PS1
HT1 (FIRST STAGE HEAT): TAP 2
HT2 (SECOND STAGE HEAT): TAP 5
OR
YL
S8X2
N
WH
G
L
BK
BLOWER
MOTOR
1
YL/WH
2
BL/WH
3
BK/WH
4
OR/WH
5
BL
COM
WH
120v
BK
BURNER
1
BOX GND
2
GAS
3
VALVE
PS2
BR
19