31
IO-242C 05/05
Wiring Diagram for GMS8/GDS8/GHS8
TO 115VAC/ 1Ø /60 HZ POWER SUPPLY WITH
JUNCTION
BOX
GND
LINE-N
LINE H
DOOR SWITCH
PROPERLY POLARIZED AND GROUNDED.
SERVICING.WIRING TO UNIT MUST BE
WARNING:DISCONNECT POWER BEFORE
CAP
BK (HI)
AUXILARY
INTEGRATED
24 VAC
FUSE
6
3
9
12
HUMIDIFIER
TWIN
R
54
1
2
87
1110
O
LED
DIAGNOSTIC
LINE-H XFMR-H HEAT-H COOL-H
BLOWER HEAT
DIP SWITCHES
OFF DELAY SELECTOR
CONTROL MODULE
(SECONDS)
BK
115 VAC HOT AND PARK TERMINALS
FROM FACTORY
2
1
GN

*

PU
ON
90
120
ON
ON
OFF
ON
180
150*
AS SHIPPED
OFF
OFF
OFF
XFMR
BK
BK
BK
115V
24V
115 VAC NEUTRAL
BR
LIMITS
W
W (N)
R (LOW)
O (MED LOW)
BL (MED)
BLOWER
CICULATOR
24V THERMOSTAT CONNECTIONS
RO2 (11)LI
MIT
GND (8)
HUMIDIFIER
XFMR (6)GND
G
C
W
YTO
MICRO
R
MV (12)
MVC (9)
A
UX
IL
I
ARY
L
I
MI
T
C
ONT
ROL
S
PS (10)
PSO (4)
HLI (7)
HLO (1)
CONTROL MODULE
INTEGRATED
NO
SWITCH
PRESSURE
ID BLOWER
VALVE
M1
GAS
C2
C
AU
TO
R
ES
ET
PR
IMA
R
Y
MAN
UA
L
RES
ET R
OLL
OU
T
LIM
IT
C
ONT
ROL(
S)
115 VAC
FLAME SENSOR
FP (2)
XFMR-H
XFMR (3)
RO1 (5)
24 VAC
HOT SURFACE
IGNITER
HUM-H
INTEGRATED CONTROL MODULE
BR
BR
COOL-H
HUMIDIFIER
IGN
IND
ID
BLWR
CIRCULATOR
HEAT-H
COOL
HEAT
BLWR
TRANSFORMER
40 VA
CO
NTR
O
L
XFMR-N
INTEGRATED CONTROL MODULE
HUM-N
CIR-N

B14933255 REV.00

5. UNIT MUST BE PERMANENTLY GROUNDED AND CONFORM TO N.E.C. AND LOCAL CODES.
ON SOME MODELS
HUMIDIFIER
24 VAC
INDUCED DRAFT
BLOWER COMPARTMENT
BURNER COMPARTMENT
REPLACED, IT MUST BE REPLACED WITH WIRING MATERIAL HAVING A TEMPERATURE
3. IF ANY OF THE ORIGINAL WIRE AS SUPPLIED WITH THE FURNACE MUST BE
"PARK" TERMINALS OF INTEGRATED CONTROL OR TAPED.
BEFORE CONNECTING BLOWER LEADS. UNUSED BLOWER LEADS MUST BE PLACED ON
4. IF HEATING AND COOLING BLOWER SPEEDS ARE NOT THE SAME DISCARD JUMPER
INTEGRATED CONTROL
INTERNAL TO
2. MANUFACTURER'S SPECIFIED REPLACEMENT PARTS MUST BE USED WHEN SERVICING.
1. SET HEAT ANTICIPATOR ON ROOM THERMOSTAT AT 0.7 AMPS.
BLOWER
GAS VALVE
PRIMARY LIMIT
BK
GN
W
IGNITER
SURFACE
HOTM1
PU
W
R
W
15 PIN PLUG
C
NO
SWITCH
PRESSURE
BR
C2
SENSOR
FLAME
BK
W
ROLLOUT LIMITS
CONTINUOUS/RAPID FLASHES = REVERSED 115 VAC POLARITY
SYSTEM LOCKOUT (RETRIES/RECYCLES EXCEEDED)
7 FLASHES = LOW FLAME SIGNAL
5 FLASHES = FLAME SENSE WITHOUT GAS VALVE
4 FLASHES = OPEN HIGH LIMIT
3 FLASHES = PRESSURE SWITCH STUCK OPEN
2 FLASHES = PRESSURE SWITCH STUCK CLOSED
STEADY ON = NORMAL OPERATION
OFF = CONTROL FAILURE
5
1 FLASH =
0
1
2
3
4
PU
6 FLASHES =
OPEN ROLLOUT
COLOR CODES:
PU PURPLE
O ORANGE
Y YELLOW
6
7
C
BK BLACK
GN GREEN
BR BROWN
PK PINK
R RED
GY GRAY
BL BLUE
W WHITE
PU
RATING OF AT LEAST 105ºC. USE COPPER CONDUCTORS ONLY.
NOTES:
OVERCURRENT PROTECTION DEVICE
JUNCTION BOX
MUST BE
WARNING:
EAC-H
SWITCH
WIRING TO UNIT
BEFORE SERVICING.
DISCONNECT POWER
LINE-H
DOOR
ELECTRONIC
AIR CLEANER
AND GROUNDED.
POLARIZED
PROPERLY
LGND
LINE-N
EAC-N
DISCONNECT
N
SWITCH (TEMP.)
FIELD SPLICE
SWITCH (PRESS.)
PROT. DEVICE
OVERCURRENT
EQUIPMENT GND
TERMINAL
JUNCTION
HI VOLTAGE FIELD
HI VOLTAGE (115V)
LOW VOLTAGE FIELD
LOW VOLTAGE (24V)
PLUG CONNECTION
IGNITER
FIELD GND
IND-N
IGN-N
OVERCURRENT PROTECTION
POWER SUPPLY WITH
TO 115 VAC/ 1/60HZ
DEVICE
W
BK
SWITCH LOCATED IN BLOWER
COMPARTMENT ON SOME MODELS
R
R
R
BL
Y
Y
R
BL
BL
PU
Y
Y
BR
O
oo
Y
Y
RR
WW
W
Y
o
BK
Y
BR
W
G
CWY
R