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Follow the vent pipe manufacturer's instructions when installing the vent pipe.
Do not common vent this appliance with any other vented appliance (Do not terminate vent
into a chimney. If the vent must go through the chimney, the vent must run all the way through
the chimney with Category III / IV approved or Special BH vent pipe).
The maximum length of exhaust vent piping must not exceed 50 ft. (deducting 5 ft. for each
elbow used in the venting system). Do not use more than 5 elbows.
When the horizontal vent run exceeds 5 ft., support the vent run at 3 ft. intervals with overhead
hangars.
Diameter
4"
*For each elbow added, deduct 5 ft. from max. Vent length.
No. of Elbows
0
1
2
5
Improper installation can cause nausea or asphyxiation, severe injury or death from
carbon monoxide and flue gases poisoning. Improper installation will void product
warranty.
WARNING
The vent terminator provides a means of installing vent pipe through the building wall and must be
located in accordance with ANSI Z223.1/NFPA 54, or in Canada with CAN/CSA-B149.1 and local
applicable codes.
A proper sidewall direct-vent terminator is recommended when the water heater is vented through a
sidewall.
General rules for venting the 520 Indoor water heater are:
1.
Place the water heater as close as possible to the vent terminator.
2.
The vent collar of the water heater must be fastened directly to an unobstructed vent pipe or PVC
adaptor.
3.
Do not weld the vent pipe to the water heater collar.
4.
Do not cut the vent collar of the unit.
5.
The weight of the vent stack must not rest on the water heater.
6.
The vent must be easily removable from the top of the water heater for normal service and
inspection of the unit.
7.
The water heater vent must not be connected to any other gas appliance or vent stack.
8.
Avoid locating the water heater vent terminator near any air intake devices. These fans can pick
up the exhaust flue products from the water heater and return them to the building. This can
create a health hazard.
9.
Avoid using an oversized vent pipe or using extremely long runs of the pipe.
10. Locate the vent terminator so that it cannot be blocked by any debris, at any time. Most codes
require that the terminator be at least 12 inches above grade, but the installer may determine if it
should be higher depending on the job site condition and applicable codes.
11. For rooftop venting, a rain cap or other form of termination that prevents rain water from entering
into the water heater must be installed.
Max. No. of Elbow
5
Max. Vertical or Horizontal Length
-Vent termination -
Max. Vertical & Horizontal (Total) Vent Length
50 ft.
45 ft.
40 ft.
25 ft.
12
│
Page
Installation
50 ft.
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