Part 5 - Venting, Combustion Air And Condensate Removal; General - Westinghouse WGR050NG076 Installation Instructions Manual

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PART 5 – VENTING, COMBUSTION AIR AND CONDENSATE REMOVAL
The heater must be vented as detailed in this Venting 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 with the instructions
provided in this manual. Failure to properly install the vent system will
result in severe personal injury or death.
A. GENERAL
This heater 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 water heater must be vented with materials, components, and systems listed and approved for Category IV appliances.
Exhaust and intake are to be piped separately. This heater cannot share a common exhaust or intake with multiple appliances. Failure
to follow this instruction 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.
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 substantial
property damage, severe personal injury, or death.
WHL-001 REV. 9.3.14