18 Rev. 1
SCHEMATICS
TO AVOID POSSIBLE ELECTRICAL SHOCK, PERSONAL INJURY,
OR DEATH, DISCONNECT THE POWER BEFORE SERVICING.
WARNING
!
GUID
HSI-2 INTEGRATED IGNITION CONTROL
This schematic is for reference only. Not all wiring is as shown above, refer
to the appropriate wiring diagram for the unit being serviced.
HEAT COOL PARK PARK
CIR
NEU
GAS
VALVE
HIGH
LIMIT
AUX
LIMIT
PRESSURE
SWITCH
FLAME
SENSOR
PROBE
IGNITER
FP
IGN
GND
MVC MV
PS
HLO
HLI
CIRCULATOR
BLOWER
XFMR
HOT
XFMR
NEU
24 VAC
TH
RO1
RO2
R
TR
C
Y
G
W
COMPRESSOR
CONTACTOR
COIL
THERMOSTAT
R
Y
G
W
INDUCER
IND
ELECTRONIC
AIR CLEANER
HUMIDIFIER
HUM
NEUHUM
EAC
EAU
NEU
ROLLOUT
SWITCH
LINE HOT
120 VAC
LINE NEU
FUSE
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