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24
120 VAC 60 HZ
L1 (HOT) L2 (NEUTRAL)
L1 (HOT) L2 (NEUTRAL)
120 VAC 60 HZ
120V
24V
HIGH LIMIT
IGNITION MODULE
CHASSIS
GROUND
IGNITOR WIRE TO
PILOT
NOTE: IF REPLACING ANY FACTORY WIRING, USE
TYPE 105°C WIRE OR EQUIVALENT, EXCEPT FOR
THE IGNITION WIRE WHICH USES 250°C WIRE
AND THE COIL LIMIT WHICH USES 200°C WIRE.
192359-000 Rev. 3
%%UWIRING
BY FACTORY
BY INSTALLER
** THESE COMPONENTS
ARE NOT FACTORY
INSTALLED AND MUST BE
SUPPLIED BY THE
INSTALLER.
GAS VALVE
COIL
LIMIT
GND
4 X 4 JUNCTION BOX
WITH TERMINAL STRIP
WHITE
GAS VALVE
BROWN
IGNITION
MODULE
WHITE
YELLOW
WHITE
RED
MV
MV
PV
PV
24V GND
GND
GND
SPARK
TO
PILOT
24V
MV/PV
MV/PV
MV
PV
MV/PV
THERMAL
BALANCER
THERMAL
BALANCER
** FUSED
DISCONNECT
SWITCH
FUSED
DISCONNECT
SWITCH
** TANK TEMP
PROBE
TANK TEMP
PROBE
WATER PUMP
** SAFETY FLOW
SWITCH (REQUIRED)
SAFETY FLOW
SWITCH
COIL
LIMIT
TRANSFORMER
120/24V
HIGH
LIMIT
WHITE/TAN
GREEN
WHITE/TAN
** WATER PUMP
4
W
Y
B
R
3
1
2
COM NO
BLACK
CONNECTION DIAGRAM
SCHEMATIC DIAGRAM
HW 300 TO 670
I.I.D. SYSTEM
SINGLE STAGE I.I.D. - HONEYWELL GAS VALVE
HW (300 thru 670). (NATURAL AND PROPANE GAS) - U.S. & CANADA
FIGURE 16.