Part 5 - Venting And Condensate Removal; General - Westinghouse WBMC**500 Manual

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Part 5 - Venting and Condensate Removal

The boiler must be vented as detailed in this section. Ensure
exhaust vent and intake piping complies with these instructions
regarding vent system. Inspect finished exhaust vent and intake
piping thoroughly to ensure all joints are well secured, airtight,
and comply with all applicable code requirements, as well as the
instructions provided in this manual. Failure to properly install
the vent system will result in severe personal injury or death.
A. General
This boiler is certified as a "Category IV" appliance and requires
a special venting system. The vent system will operate with
a positive pressure in the pipe. Exhaust gases must be piped
directly outdoors using the vent materials and rules outlined
in these instructions. Do not connect vent connectors
serving appliances vented by natural draft into any portion of
mechanical draft systems operating under positive pressure.
Follow the venting instructions carefully. Failure to do so will
result in substantial property damage, severe personal injury,
or death.
1. Installation should be made in accordance with the regulations
of the Authority Having Jurisdiction, local code authorities, and
utility companies which pertain to this type of water heating
equipment.
2. Install the venting system in accordance with these
instructions and with the National Fuel Gas Code, ANSI Z223.1/
NFPA 54, CAN/CGA B149, and / or applicable provisions of local
building codes.
3. This boiler must be vented with materials, components, and
systems listed and approved for Category IV appliances.
Exhaust and intake are to be piped separately. This boiler cannot
share a common exhaust or intake with multiple appliances.
Failure to follow these instructions will result in substantial
property damage, severe personal injury, or death.
NOTE: To avoid contamination often contained in indoor air, it
is best to pipe all intake combustion air directly to the outdoors.
NOTE: If exhaust vent pipe system passes through an unheated
space such as an alcove or attic, the space must be heated or
the pipe must be insulated. The insulation must have an R value
sufficient to prevent freezing of the condensate.
Improper seating of vent pipe gaskets can cause eventual
gasket failure and exhaust gas leakage. Ensure the exhaust vent
pipe is properly beveled and seated before insertion into the
flue adapter. Failure to do so could result in property damage,
severe personal injury, or death.
For closet and alcove installations: CPVC, polypropylene, or
stainless steel venting material MUST BE USED. Failure to
follow this statement could result in product damage, severe
personal injury, or death.
WHL-033 Rev. 1.29.16
Due to the extreme flammability of most glues, cements,
solvents, and primers used to join plastic exhaust vent and
intake pipes, explosive solvent vapors must be cleared from
all vent piping before start-up. Avoid using excess cement or
primer, as this may pool in the vent pipes. Vent assemblies
should be allowed to cure for a period of at least 8 hours before
powering a connected appliance. Failure to follow these
instructions will result in substantial property damage, severe
personal injury, or death. It is the installers' responsibility to
understand the hazards associated with explosive solvents
and take the necessary precautions to avoid these risks.
DO NOT insulate the first 3 feet of the exhaust vent. CPVC,
Polypropylene, or Stainless Steel pipe material MUST be
used for the first 3 feet of the vent run if the exhaust vent is
insulated or passes through an enclosed space greater than
6", such as a wall. The balance of the vent run can be installed
with standard Schedule 40 PVC pipe. Failure to comply with
this warning could result in property damage, severe personal
injury, or death.
Exhaust vent adaptors are not designed as load-bearing
devices, and must not be used to support exhaust vent piping.
All vent pipes must be properly connected, supported, and
the exhaust vent must be pitched a minimum of 1/4" per foot
back to the boiler to allow drainage of condensate. Failure
to properly support vent piping and follow the information
in this statement could result in product damage, severe
personal injury, or death.