Specifications
Table Of Contents
26 www.goodmanmfg.com SS-GSXC18
SS-GSXC18 www.goodmanmfg.com 27
Wiring is subject to change. Always
refer to the wiring diagram or the
unit for the most up-to-date wiring.
⚠ Warning
High Voltage: Disconnect all power before servicing or installing this unit. Mulple power
sources may be present. Failure to do so may cause property damage, personal injury, or death.
⚡
Wiring Diagram
WIRING CODE FACTORY WIRING
HIGH VOLTAGE
LOW VOLTAGE
HIGH VOLTAGE
FIELD
OPTIONAL HIGH
VOLTAGE
OPTIONAL LOW
VOLTAGE
CO
LOR COD
E
BK --------------- BLACK
BL --------------- BLUE
BL/PK --------- - BLUE/PINK STRIPE
BR -------------- - BROWN
OR --------------- ORANGE
PU -------------- - PURPLE
RD --------------- RED
WH -------------- WHITE
YL --------------- YELLOW
YL/PK --------- - YELLOW/PINK STRIPE
1
3
4
6
E11
E16
GR/YL
BL
BR
RELAY
RELAY
RELAY
HERM
COM
START
RUN
230 VAC
SUPPLY
L1
L2
E13
L2 OUT
L2
L1
E10
R
C
START
E5
E8
CAP COM
CH
E21
E17
START
RLY
WH
UC BOARD
LPS
HPS
FUSE
O
L
R
C
W1
Y1
E2
Y2
FAN
RUN
RELAY
RELAY
1
2
1
2
R
C
E25
E29
E28
E26
E24
E23
E22
E14
HIGH
LPCO
HPCO
E47
E1
OAT OCT
OAS
RD
WH
BL
BL
WH
YL
YL
BR
GND
LOW VOLTAGE
BARRIER
BL/PK
BK
YL/PK
YL/PK
RD
BK
BK
BK
BL/PK
RCCF
C
R
S
AUX
MAIN
COMP
CS
Y 2
C
BK
YL
RD
CONTROL BOX
L
Y2
Y1
C
O
L (OPTIONAL)
Y2
Y1
W1
C
LEGACY INDOOR T-STAT
C
R
2
1
C
R
2
1
R
R
C
R
INDOOR POWER SUPPLY 24 VAC
COMMUNICATING INDOOR T-STAT
INDOOR POWER SUPPLY 24 VAC
TO INDOOR COMMUNICATING PCB
0140R00142-G
THIS WIRING SCHEMATIC SHOWS THE LEGACY WIRING FROM
THE FACTORY. THE WIRES GO TO INDOOR T-STAT AS SHOWN
IN "LEGACY INDOOR T-STAT". TO WIRE THE SYSTEM IN
COMMUNICATING MODE, THE INSTALLER HAS TO WORK
THE WIRING AS SHOWN IN "COMMUNICATING INDOOR T-STAT".
REFER TO THE IO MANUAL LOCATED IN COMMUNICATING
T-STAT KIT FOR MORE DETAILS.
FROM
OUTDOOR
UNIT
FROM
OUTDOOR
UNIT
GND
L1
L2
BK
YL
YL
CM
RES
2 5
1
SR SC
OPTIONAL HARD START
COM
PONENT CODE
C --------------- CONTACTOR
CM ------------ CON DENSER FAN MOTOR
COMP ------- - COMPRESSOR
CS ------------ - COMPRESSOR SOLENOID
DT ------------- DISCHARGE THERMOSTAT
HPS ---------- - HIGH PRESSURE SWITCH
IO ------------- - INTERNAL OVERLOAD
LPS ---------- LOW PRESSURE SWITCH
OAS ----------- OUTDOOR AIR SENSOR
RCCF -------- - RUN C APACITOR FOR COMPRESSOR & FAN
SC ------------ - START CAPACITOR FOR COMPRESSOR (OPTIONAL)
SR ------------ - START RELAY FOR COMPRESSOR (OPTIONAL)
CH ------------ CRANKCASE HEATE
R (OPTIONAL)
CHS ---------- CRANKCASE HEATER SWITCH (OPTIONA L)
CONTROLS SHOW N WITH THERMOSTAT IN 'OFF' POSITION.
YL
PU
BL
RD
DT
SEE NOTE 1
NOTES:
1. IF DT IS NOT PRESENT, HPS BL/PK WIRE
GOES DIRECTLY TO TERMINAL E29.
2. USE COPPER SUPPLY W IRES ONLY.
3. USE 40VA TRANSFORMER MINIMUM.
4. CRANKCASE HEATER FACTORY
INSTALLED OPTION.
5. USE N.E.C. CLASS 2 WIRES.
H
F
C
BK
L1
L2
K2
C
R
S
COM P
R
S
1
2
5
SC
C
UC C ON TR OL
HERM
CAP
COM
SR
OP TIONA L HA RD
ST ART
EC M FA N
MOT O R
C
HERM
C
RUN
CAP ACITO R
FAN
HIGH V OL TA GE AR EA
LOW VOL TA G E AR EA
O
L
R
C
W 1
Y1
E2
Y2
1
2
LPS
E22
E23
E24
E26
E47
E1
HPS
OA S
DT
E28
E29
E14
CS
1 3
4 6
E11
CM
SEE NOTE 2
NOTE 2
K6
CHS
CH
NOTE 4
CHS
GR/YL
BK
NOTE 4
RD
RD
BK
PU
SEE NOTE 5
SEE NOTE 5
SEE NOTE 5
SEE NOTE 5