American Water Heater 240HX3 Installation Manual And Owner's Manual page 26

DIP switch settings : Single pipe and Direct vent installations / Vent diameter : 4" venting
240HX3/340HX3 Indoor
5 to 50 ft (1.5 to 15.2 m)
(DEFAULT)
ON 1 2 3 4 5 6 7 8 9 10
OFF
No. 6 : O N
No. 7 : OFF
<How to remove 3" PVC adapter from the intake/exhaust collar>
Remove the 3" adapter when using metal vent.
4" stainless steel
vent straight pipe
or appliance adapter
Intake vent
collar (Female)
4" elbow with bird
screen
Intake vent
collar (Female)
• 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.
WARNING
• 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.
Vent length
51 to 100 ft (15.3 to 30.5 m)
ON 1 2 3 4 5 6 7 8 9 10
OFF
No. 6 : OFF
No. 7 : OFF
4" vent connection for direct-vent installation
4" stainless steel
vent straight pipe or
appliance adapter
Exhaust vent collar
of the Indoor
models (Female)
4" vent connection for single vent installation
4" stainless steel
vent straight pipe or
appliance adapter
Exhaust vent collar
of the Indoor models
(Female)
26
540HX3 Indoor (Upper bank of DIP switches)
5 to 50 ft (1.5 to 15.2 m)
(DEFAULT)
ON 1 2 3 4 5 6 7 8
OFF
No. 3 : O N
No. 4 : OFF
3" adapter*
Intake vent collar
(Female)
Screw
• Connect 4" stainless steel vent straight pipes
or appliance adapters to the exhaust/intake
vent collar.
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.
Page
Installation Manual
Installation
51 to 100 ft (15.3 to 30.5 m)
ON 1 2 3 4 5 6 7 8
OFF
No. 3 : OFF
No. 4 : OFF
3" adapter*
Exhaust vent
collar (Female)