Water Heater Installation Manual
57 Page
Components Diagram
Owner's Guide
061
716
716
711
701
713
103
709
402
707
708
714
721
407
408
701
714
715
715
721
707
722
715
402
402
103
713
708
711
709
722
402
540HX3
540HX3240HX3/340HX3
240HX3/340HX3
Computer board assembly
87
65
4
3
2
1
ON
654
3
2
1
ON
R
W
G
Y
PCB
W
120 VAC
G
Ground
SW
Ground
BK
W
G
BK
W
Surge
box
73
53
9
3
BL
BL
R
BK
R
W
BK
BK
BK
BK
BK
BK
W
BK
W
Heater
Y
Y
O
Ground
Flame rod
AFR rod
BK
BK
W
Green LED
DIP switches
Bypass
Valve
R
W
BR
Y
BL
Gas
Propor-
Valve
R
Y
O
BL
W
FM
IG
Igniter rod
P
P
exchanger Heat
thermistor
Inlet thermistor
Outlet thermistor
1
2
Flow
Sensor
Flow
Adjust-
ment
Valve
Hi-
switch
limit
O.H.C.F
MV
SV1
SV2
SV3
BL
BL
BL
BL
LB
G
O
R
BL
BK
Parent
711
713
713
713
103
713
713
704
715
402
402
715
715
714
709
708
Y
Y
540HX3 Outdoor Only
Y
Y
Heater
Heater
Heater
540HX3 Indoor Only
Heater
Heater
Heater
707
BK
W
Remote controller
Built-in controller
W
BL
R
BK
722
Only
Indoor
540HX3
Thermostat
BK
Y
Hi-limit switch
for exhaust
Exhaust
thermistor
W
W
W
W
721
Indoor
Only
540HX3
Drain plug detector
G
G
721
Outdoor
Only
540HX3
Drain plug
detector
G
G
9
8
7
65
4
3
21
10
OFF
Remote controller
R
BK
R
W
BK
Ground
G
O
W
Y
BL
O
R
PCB
W
120 VAC
G
Ground
SW
Ground
W
BK
G
Gas
Propor-
Valve
W
R
BK
BK
W
BK
BK
Outlet thermistor
Inlet thermistor
Surge
box
W
BK
W
BL
R
BK
Built-in controller
BK
DIP switches
Y
Flame rod
AFR rod
BK
W
Thermos
tat
Green LED
Flow
Adjust-
ment
Valve
Flow
Sensor
FM
Indoor Only
240HX3/340HX3
713
713
103
713
713
704
408
407
722
707
402
402
714
709
708
Y
Y
240HX3/340HX3 Outdoor Only
Y
Y
Heater
Heater
Heater
240HX3/340HX3 Indoor Only
Heater
Heater
Heater
Y
Y
Heater
Y
Igniter rod
P
P
IG
711
O
R
G
LB
BL
O.H.C.F
BL
BL
BL
BL
BL
BL
SV3
SV2
SV1
MV
73
53
9
3
Hi-limit
switch
Hi-limit switch
for exhaust
Exhaust
thermistor
W
W
W
W
W
W
721
Only
240HX3/340HX3 Indoor
G
G
G
Drain plug
detector
240HX3/340HX3 Outdoor Only
G
G
G
Drain plug
detector
G
721
Wiring diagram