HTP EL-399NVWH - Manual (Page 27)

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LP- 346 REV. 3.20.14
3. This boiler must be vented with materials, components, and systems listed
and approved for Category IV boilers.
Exhaust and intake are to be piped separately. This boiler 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.
Failure to follow all instructions can result in flue gas spillage and carbon
monoxide emissions, causing severe personal injury or death.
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 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.
B. APPROVED MATERIALS FOR EXHAUST VENT AND INTAKE PIPE
APPROVED EXHAUST VENT AND INTAKE PIPE MATERIAL
Item Material
Standards for Installation in:
United States Canada
Exhaust vent or Intake pipe
and fittings
PVC schedule 40/80 ANSI/ASTM D1785 PP, CPVC, and PVC venting
must be ULC-S636 Certified.
IPEX is an approved
manufacturer in Canada,
supplying vent material listed to
ULC-S636.
PVC-DWV* ANSI/ASTM D2665*
CPVC schedule 40/80 ANSI/ASTM F441
Polypropylene ULCS636
Stainless Steel AL29-4C
Certified for Category IV and
direct vent appliance venting Certified for Category IV and
direct vent appliance venting
Pipe cement/primer
PVC ANSI/ASTM D2564 IPEX System 636 Cements &
Primers CPVC ANSI/ASTM F493
Table 12