Polaris BSS, Инструкция по эксплуатации, Страница: 22 / 63

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VENT INSTALLATION CONSIDERATIONS
This water heater has a direct vent system in which all air for
combustion is taken from the outside atmosphere and all
combustion products are discharged to the outdoors.
This water heater must be properly vented for removal of exhaust
gases to the outside atmosphere. Correct Installation of the vent
pipe system is mandatory for the safe and efficient operation of
this water heater and is an important factor in the life of the unit.
Vent pipe installation must be performed in accordance with state
and local codes, or in the absence of such, the National Fuel
Gas Code, NFPA 54, ANSI Z223.1-current edition. Canadian
installations must be performed in accordance with CAN/CSA-
B149.1-current edition.
Either 2 inch or 3 inch pipe may be used on the vent termination
for 130,000 & 150,000 Btu/hr models. When concentric venting
130,000 & 150,000 Btu/hr, use only 2 inch concentric vent on the
vent termination. When concentric venting 130,000 & 150,000
Btu/hr models, 3 inch pipe must be reduced to 2 inch concentric
vent at the termination. Use only 3 inch pipe or 3 inch concentric
vent on the vent termination for 175,000 & 199,000 Btu/hr models.
When replacing an existing Polaris unit, it is recommended
that the venting system be reviewed for compliance with the
requirements contained in this instruction manual. If the venting
is not in compliance, it is recommended that the appropriate
changes be made to bring it into compliance. Never operate the
water heater unless it is vented to the outdoors.
Note: It is important that the factory-installed air inlet filter be
inspected periodically and cleaned if necessary. See Integrated
Filter Preventative Maintenance on Page 54 in the Periodic
Maintenance section.
Note: If vent system is not in compliance with the current installation
manual, the manufacturer reserves the right to evaluate installation
prior to granting any warranty on service claims.
Important: Check to make sure the vent pipe is not blocked in
any way.
Note:
Do not common vent this water heater with any other
appliance. Do not install in the same chase or chimney with
a metal or high-temperature plastic from another gas or fuel
burning appliance.
In cold climates any water vapor remaining in the flue gases
will condense into a cloud of vapor at the point where the vent
system exits the building. Special consideration is recommended,
before locating the vent termination near walkways, windows and
building entrances.
Direct venting into dead spaces such as alleys, atriums, and
inside corners can cause recirculation of flue gases. Recirculation
of flue gases will cause sooting, and icing of the combustion air
intake during severe cold weather. To prevent the recirculation
of flue gases, maintain as much distance as possible between
the combustion air intake and the exhaust vent terminal. Refer
to Horizontal Vent Terminal Installation on Page 25 and Vertical
Vent Terminal Installation on Page 26.
GENERAL VENTING INSTRUCTIONS
The following guidelines should be followed when installing the
air inlet and exhaust outlet piping:
• Venting should be as direct as possible with a minimum
number of pipe fittings.
• Vent diameter must not be reduced unless specifically noted in
the installation instructions.
• All 2” horizontal inlet vent piping must be sloped downward
1/4 inch per foot (3” Piping must slope downward 1/8” per foot)
toward the water heater so that moisture in the inlet air will exit
through the air intake moisture drain trap.
• All 2” horizontal exhaust vent piping must be sloped upward
1/4 inch per foot (3” Piping must slope upward at 1/8” per foot)
so that condensate will run back to the heater and exit through
the condensate trap.
• Support all horizontal pipe runs every four feet and and all
vertical pipe runs every six feet or according to local codes.
• All venting systems (except Polypropylene vent systems)
run through unconditioned spaces where below freezing
temperatures are expected should be properly insulated
to prevent freezing. For horizontal runs, wrap the vent pipe
with nationally recognized/listed heat tape and/or approved
insulation for freeze protection. Install per the manufacturer’s
instructions.
• An air intake filter is included with the unit and must be installed
according to the installation instructions supplied with the filter.
• It is important to select the proper pipe cement for the type
of plastic pipe being used. All joints in the vent system piping
(except Polypropylene vent systems) must be properly
cemented. Polypropylene vent systems do not use cement to
connect the pipe and elbow sections but use a push together
gasket seal method. Do not attempt to connect Polypropylene
with sealant cement.
• Piping must be sized and cut before cementing. Cut the pipe
end square and remove all ragged edges and burrs. Make sure
the inside of the pipe is clean and free of cuttings and loose dirt.
Chamfer the end and apply primer to the fitting and pipe. Apply
a moderate even coat of pipe cement inside the fitting. Apply
a liberal amount of cement to the outside of the pipe to socket
depth. Assemble the parts quickly while cement is still wet. Twist
the pipe 1/4 turn during insertion and hold for 30 seconds.
• All pipe, fittings, pipe cement, primers and procedures must
conform to American National Standard Institute and American
Society for Testing and Materials (ANSI/ASTM) standards in
the United States. This water heater has been design certified
by the Canadian Standards Association for use with the
specified (CSA) listed plastic vent pipe.
APPROVED VENT/INTAKE MATERIAL
Approved vent and intake air pipe materials that may be used in
the United States:
PVC pipe materials:
• DWV ASTM-D2665 or CSA B181.2
• Schedule 40, 80, 120 ASTM-D1785 or CSA B137.3
• SDR Series ASTM-2241 or CSA B137.3
VENTING INSTALLATION