Installation Instructions

whl-590 Rev. 003 Rel. 003 Date 3.22.18
29
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 ue adapter. Failure to do so 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 heater 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.
B. Approved Materials for Exhaust Vent and Intake Pipe
Table 12 - Approved Materials for Exhaust Vent and Intake Pipe
Due to the extreme ammability 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.
t The exhaust and intake components installed with this boiler must be used for near boiler piping BEFORE transitioning to the
approved materials listed above. DO NOT REMOVE these installed components. Doing so WILL VOID boiler warranty.
t PVC / CPVC pipe and ttings of the same diameter are considered interchangeable.
t DO NOT use Foam Core Pipe in any portion of the exhaust piping from this boiler.
t DO NOT connect PVC/CPVC to Polypropylene without an approved vent connector.
t Any transition to Polypropylene MUST be done in the vertical within ve (5) feet of the appliance.
t When installing AL29-4C vent piping, install a PVC-to-stainless adapter at the boiler vent connection, and at the termination when
using a PVC termination kit. DO NOT mix AL29-4C piping from dierent manufacturers unless using adapters specically designed
for the purpose by the manufacturer.
t A double wall vent may be used when using stainless steel vent material in a freezing climate.
t *ABS may be used for air intake applications ONLY. ABS is NOT PERMITTED for use in Canada.
t Contact the venting material manufacturer if there is any question about the applicability of the proposed venting material.
Failure to follow these directions will result in substantial property damage, severe personal injury, or death.
Item Material
Standards for Installation In:
United States Canada
Pipe and Fittings Approved
for Intake ONLY
ABS* ANSI/ASTM D2661 NOT PERMITTED
Pipe Approved for
Intake OR Exhaust Vent
PVC Schedule 40/80 ANSI/ASTM D1785
PVC, CPVC, and PP Venting Must
be ULC-S636 Certied. IPEX is an
approved manufacturer in Canada.
PVC-DWV Schedule 40/80 ANSI/ASTM D2665
CPVC Schedule 40/80 ANSI/ASTM F441
Polypropylene UL-1738 or ULC-S636
Stainless Steel AL29-4C Certied for Category IV and Direct Vent Appliance Venting
Pipe Fittings
PVC Schedule 40 ANSI/ASTM D2466 or D2665
PVC, CPVC, and PP Venting Must
be ULC-S636 Certied. IPEX is an
approved manufacturer in Canada.
PVC Schedule 80 ANSI/ASTM D2467 or D2665
CPVC Schedule 40 ANSI/ASTM F438
CPVC Schedule 80 ANSI/ASTM F439
Pipe Cement
ABS* ANSI/ASTM D2235 NOT PERMITTED
PVC ANSI/ASTM D2564
IPEX System 636 Cements and
Primers
CPVC ANSI/ASTM F493
Pipe Primer PVC / CPVC ASTM F656