HTP 850 LPHL - Manual (Page 25)

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LP- 205 REV. 3.28.14

The air inlet and exhaust 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.

PVC/CPVC pipe and fittings of the same diameter are considered interchangeable.

Do NOT use Foam Core Pipe in any portion of the exhaust piping from this boiler.

DO NOT connect PVC/CPVC to PP without an approved vent connector.

When installing AL29-4C vent piping, install a PVC-to-stainless adapter at the boiler vent connection, and at the termination
when using an HTP PVC termination kit. DO NOT mix AL-29-4C piping from different manufacturers unless using adapters
specifically designed for the purpose by the manufacturer.

*PVC-DWV for air intake applications ONLY.
Failure to follow these directions will result in substantial property damage, severe personal injury, or death.
DO NOT mix components from different venting systems without proper adapters. The vent system could fail, causing leakage of flue
products into the living space. Use only the approved pipe and fitting materials, primer and cement, and adapters specifically designed
for the material used, as listed in Table 9. 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 glued, properly supported, and the exhaust must be pitched a minimum of ¼” 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.
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.
NOTE: The use of double-wall vent or insulated material for the combustion air inlet pipe is recommended in cold climates to prevent
the condensation of airborne moisture in the incoming combustion air.
C. REQUIREMENTS FOR INSTALLATION IN CANADA
1. Installations must be made with a vent pipe system certified to ULC-S636. IPEX is an approved vent manufacturer in Canada
supplying vent material listed to ULC-S636. Additionally you may use AL29-4C stainless steel venting to comply with Canadian
requirements.
2. The first three (3) feet of vent pipe from the boiler flue outlet must be readily accessible for visual inspection.
3. The components of the certified vent system must not be interchanged with other vent systems or unlisted pipe / fittings.
Cellular foam core piping may be used on air inlet piping only.
Use only venting materials approved for use with Category IV appliances installed in accordance with the National Fuel Code. The
following materials are approved for use as vent pipe for this boiler. Failure to use approved materials could result in substantial
property damage, severe personal injury, or death.