MORTEX
PRODUCTS
INC
501
TERMINAL
RD
FORT
WORTH,
TX
76106
Page
33
SECTION IX: Wiring Diagram
Figure 33: Wiring Diagram A/C Ready Models
NOTE:
IF ANY OF THE ORIGINAL WIRE SUPPLIED WITH THIS UNIT MUST BE REPLACED. IT MUST BE REPLACED
WITH TYPE 105°C THERMOPLASTIC OR its EQUIVALENT.
L1
COOL
HEAT
XFMR
NE
UT
RAL
S
W
G
C
R
Y
3 AMP
FUSE
SEC
COM
T
ON
OF F
P
90
75
60
180
150
120
Toggl
e
S
w
it
c
h
ON
/
OF
F
RE
D
BLK
BLK
BL
K
BL
K
BL
K
BLK
W HT
WH
T
W HT
WH
T
W HT
INDOOR
BLOW ER
MOTOR
W HT
BLK - L1
WH
T
W HT
RED - LOW SPD
CBM
120 V
A
C
PI
G
T
AI
L
S
BLK - HI SPD
BRN
BRN
BRN
BRN
FLA
M
E
S
E
N
S
O
R
W R 36J GAS VALVE
BRN
ORN
ORN
BLU
BLU
GRY
GRY
GR
N
LS
ALS
Auto
Re se t
Reset
Manua l
BLU
BL
U
BL
U
PS
BL
K
SCHEMATIC DIAGRAM
LADDER DIAGRAM
120 VAC
NEUTRAL
1
2
3
4
5
6
1
2
3
P
4
6
1
3
2
5
4
5
6
78
9
HOT SURFACE IGNITOR
YEL
YEL
YEL
C
C
120
24
BLU - Me d-Hi SPD
9 P
IN
P
L
U
G
HR
CR
CMR
IGNR
L1
BLK
BL
K
BLK
XFMR
INDOOR
FAN
MOTOR
W HT
W HT
BLK
BLK
W HT
1
3
4
6
W HT N
N
N
CO
N
T
RO
L
BO
ARD RE
L
A
Y
S
CBM
IGN
LI
N
E
V
O
LTA
G
E
BL
K
W HT
BLK
BLK
W HT
3A
FUSE
BLU
BL
U
BLU
RED
RED
120 VAC
24 VAC
c
c
120
24
s e c
com
WH
T
WH
T
W HT
BM - Blow e r Motror
CAP - Run Ca pa citor
CBM - Combustion Blower Motor
CMR - Combustion Motor Relay
COM - 24 VAC Common
CR - Cooling Blower Motor Relay
FP - 9 Pin Female Plug on Control Board
6FP - 6 Pin Fema le Plug on Control Board
GV - Ga s Va lve
GVR - Gas Valve Relay on Control Board
HR - He ating Blower Motor Relay
IGN - Hot Surface Ignitor
INGR - Hot Surface Ignitor Relay on Control Board
LS - Main Limit Switch - Automatic Reset
ALS - Auixiliary Limit Switch - Manual Reset
PS - Combustion Motor Pressure Switch
FS - Flame Se nsor
SEC - 24 VAC Pow er
XFMR - Transformar 120 VAC Supply VAC
3A - # Amp Fuse
---- - Field Wiring
- Plug Terminal Connection
NOTE: HR, CMR, CR, GCR and INGR relays are
integrated into the control board
Note s:
1. All field wiring must be per the following:
A: National Electrical Code (NEC) a nd / or
B: Canadian Ele ctrical Code (CEC) a nd / or
C: State, County, Local, Regional, or City Codes.
2. If any origional (Factory) wire must be replaced;
then replace the wire with wire that has the same
tempe rature rating of at least 221 degF (105 degC).
3. Only use c opper conductors for field wiring.
4. All replaceme nt components must be properly grounded.
5. Provide circuit breakers sized to protect wiring
service to the c ontrol box pigtails.
6. Motors have internal over-temperature protection.
- CAUTION -
Open a ll disconne cts
be fore se rvicing
WIRING DIAGRAM 61CC0654A
G18D MOBILE HOME GAS FURNACE
A/C READY
The
rm
os
ta
t
P
ig
ta
ils
RED
BLK
GRN
W HT
BLK
BLK
BL
K
BL
K
WH
T
WH
T
W HT
W HT
BL
K
BLK
BLK
BL
K
PS
ALS
LS
GVR
GVSC
5
6
8
3
4
2
com
BLU
BLU
BLU
ORN
BLU
BLU
BLU
GRY
GRY
BRN
BRN
BRN
BLU
LEGEND
W
C
G
ORN - MED-LOW SPD
Control Board Flash Co des
Steady O N - Control OK
1 Flash - Lockout due to failed ignition
2 Flashes - Pressure switch fault, pressure switch stuck open
3 Flashes - Pressure switch fault, pressure switch stuck closed
4 Flashes - Limit switch is open or limi t switch fault. (5 limit
5 Flashes - Flame sense with no call for heat or gas valve fault
Rapi d Fl ash - L1/neutral reversed or voltage not present on L1
Steady O FF - Control fault or no power
cycles during single call for heat or limit open fo r
more than 5 minutes
L1
COM
ST5
ST4
ST3
ST2
ST1
BLK
GRN
W HT
RED
ORN
BLU
GND
GRN - Com
RED - Constant Circulation Speed
BLU
WHT - Heating Speed
BLU
W HT - N
GRN - GND
W HT - MED SPD
W HT
GRN - COM
Pin #
9 Pin Plug Pinout
W ire Color
1
2
3
4
5
6
7
8
9
GRN
BLK
W HT
GRN
W HT
ORN
RED
BLK
BLU
Common
Hi Spe ed
Medium Speed
Motor Connection
Ground
Ne utra l
Med-Low Speed
Low Spe ed
Line VAC
Med-High Speed
R
RED
BL
U
RE
D
GR
N
GRN
BLK
W HT
BLK
W HT
BLK
RE
D
RED
W HT
W HT
WH
T
ORN
BR
BRC
HEAT
W HT
RED
Control
Boa rd
Rela y
Externa l
Rela y
BR - He ating Blower Relay - 24 VAC
BRC - Heating Blower Relay 120 VAC Coil
YEL
YEL
Y
BL
K
BL
K
BLK
BLK
YEL
Control Boa rd
Y
