A.O. Smith HW 610 - Manual (Page 24)

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
W
H
IT
E
/T
A
N
G
R
E
E
N
W
H
IT
E
/T
A
N
** 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.