Water Heater Installation Manual
26 Page
Installaon
Installaon Manual
DIP switch settings : Single pipe and Direct vent installations / Vent diameter : 4" venting
240HX3/340HX3 Indoor 540HX3 Indoor (Upper bank of DIP switches)
Vent length
5 to 50 ft (1.5 to 15.2 m)
(DEFAULT)
51 to 100 ft (15.3 to 30.5 m) 5 to 50 ft (1.5 to 15.2 m)
(DEFAULT)
51 to 100 ft (15.3 to 30.5 m)
OFF
ON
1 2 3 4 5 6 7 8 9 10
No. 6 : O N
No. 7 : OFF
OFF
ON
1 2 3 4 5 6 7 8 9 10
No. 6 : OFF
No. 7 : OFF
OFF
ON
1 2 3 4 5 6 7 8
No. 3 : O N
No. 4 : OFF
OFF
ON
1 2 3 4 5 6 7 8
No. 3 : OFF
No. 4 : OFF
4" stainless steel
vent straight pipe or
appliance adapter
Exhaust vent collar
of the Indoor
models (Female)
Intake vent
collar (Female)
4" stainless steel
vent straight pipe
or appliance adapter
Exhaust vent collar
of the Indoor models
(Female)
4" stainless steel
vent straight pipe or
appliance adapter
Intake vent
collar (Female)
4" elbow with bird
screen
1. Connect a 4" stainless steel vent pipe or appliance
adapter to the exhaust vent collar.
2. Connect a 4" elbow to the intake vent collar.
• Connect 4" stainless steel vent straight pipes
or appliance adapters to the exhaust/intake
vent collar.
Remove the 3" adapter when using metal vent.
Exhaust vent
collar (Female)
Intake vent collar
(Female)
3" adapter*
3" adapter*
Screw
<How to remove 3" PVC adapter from the intake/exhaust collar>
WARNING
• Follow the clearances listed on pages 14-16 when installing the vent and air intake
terminations.
• Follow the vent manufacturer’s installation instructions and clearance requirements.
• Use 4" Category III/IV approved or Special BH, single or double wall stainless steel vent pipe.
• Do not mix parts or fittings of different material types, and do not mix pipe, fittings, or
joining methods from different manufacturers. Combustion exhaust can contain carbon
monoxide and must be properly vented outside. Breathing abnormal amounts of carbon
monoxide can result in serious injury or death.