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TANKLESS WATER HEATER
5. Do not install venting system components on
the exterior of the building except as specifically
required by these instructions.
•
Vent terminals must be at least 1 foot from
any door, window, or gravity inlet into the
building.
•
Maintain the correct clearance and
orientation between the exhaust vent and
intake pipe terminals.
•
The exhaust vent and air intake terminals
must be at the same height and their center
lines must be spaced apart 1 foot minimum.
•
The bottom of the exhaust vent and intake
pipe terminals must be at least 1 foot above
the normal snow accumulation level. In no
case should these terminals be installed less
than 1 foot above normal snow accumulation
level.
•
Do not install the exhaust vent terminals directly above windows or doors.
•
Intake pipe terminal must not terminate in areas that might contain combustion air contaminates, such as
near swimming pools.
•
For sidewall venting, the minimum horizontal distance between adjacent exhaust vent terminations is
1 foot. It is recommended this distance be greater than 1 foot to better avoid frost damage to building
surfaces.
•
For roof venting, minimum horizontal distance between any adjacent exhaust vent termination is 1 foot.
•
If the exhaust vent is to be terminated in a walled off area (such as a roof with a parapet wall), ensure the
exhaust vent terminates a minimum of 10' from nearest wall and extends level with or above the top of
the wall. This will ensure flue gas does not get trapped and possibly recirculated into the intake air pipe,
which could contaminate the combustion air.
WARNING
•
Remove all burrs and debris from joints and fittings.
•
When using PVC or CPVC pipe, all joints must be properly cleaned, primed, and cemented. Use only
cement and primer approved for use with the pipe material. Cement must conform to ASTM D2564
for PVC and ASTM F493 for CPVC pipe. NOTE: DO NOT CEMENT POLYPROPYLENE PIPE.
•
Ensure the vent is located where it will not be exposed to prevailing winds.
•
In all roof venting applications, exhaust discharge must point away from the pitch of the roof.
•
To prevent water leakage, install adequate roof flashing where the pipe enters the roof.
•
Do not locate vent over public walkways, driveways, or parking lots. Condensate could drip and
freeze, resulting in a slip hazard or damage to vehicles and machinery.
•
Due to potential moisture build-up, sidewall venting may not be the preferred venting option. To save
time and cost, carefully consider venting installation and location.
•
Horizontal lengths of exhaust vent must slope back towards the water heater not less than ¼" per
foot to allow condensation to drain from the vent pipe.
•
The exhaust vent must terminate where vapors cannot make accidental contact with people or pets,
or damage shrubs or plants.
22
All joints of positive pressure vent systems must be sealed completely to
prevent leakage of flue products into living space.
Breathing Hazard - Carbon Monoxide Gas
Do not operate water heater if the unit has been
subjected to flood damage.
Install vent system in accordance with local codes
and manufacturers installation instructions.
Do not place chemical vapor emitting products
near unit.
According to NFPA 720, carbon monoxide detec-
tors should be installed outside each sleeping
area.
Never operate the heater unless it is vented to
the outdoors.
Analize the entire vent system to ensure that
condensate will not become trapped in a section
of vent pipe and therefore reduce the open cross
sectional area of the vent.
Breathing carbon monoxide can cause brain damage or death.
Always read and understand the instruction manual.
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