VENTING, INLET AIR AND CONDENSATE

5. VENTING, INLET AIR AND CONDENSATE

A.GENERAL

1.Install the boiler 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.

2.This boiler is a direct vent appliance and is listed as a Category IV appliance with Underwriters Laboratories, Inc.

WARNING

This vent system will operate with a positive pressure in the pipe. Do not connect vent connectors serving appliances vented by natural draft into any portion of mechanical draft systems operating under positive pressure.

WARNING

Follow these venting instructions carefully. Failure to do so may result in severe personal injury, death, or substantial property damage.

B.APPROVED MATERIALS FOR EXHAUST VENT AND INTAKE AIR PIPE

1.Use only Non Foam Core venting material. The following materials are approved for use as vent pipe for this boiler:

a.Non Foam Core PVC (Polyvinyl Chloride) Pipe conforming to ASTM D-1784 Class 12454-B (formerly designated Type 1, Grade 1).

b.Non Foam Core CPVC (Chlorinated Polyvinyl Chloride) Pipe conforming to ASTM D-1784 Class 23447-B (formerly designated Type IV, Grade 1).

c.Non Foam Core ABS (Acrylonitrile-Butadiene- Styrene) Pipe conforming to ASTM D3965 Class 3-2-2-2-2.

WARNING

Do not use Foam Core Pipe in any portion of the exhaust piping from this boiler. Use of Foam Core Pipe may result in severe personal injury, death, or substantial property damage.

2.Cellular foam core piping may be used on air inlet piping only. Never use cellular foam core material for exhaust piping.

C.EXHAUST VENT / AIR INTAKE PIPE LOCATION

1.Determine exhaust vent location:

a.The vent piping for this boiler is approved for zero clearance to combustible construction.

b.See Figure 5.1 for an illustration of clearances for location of exit terminals of direct-vent venting systems.

c.This boiler vent system shall terminate at least 3 feet (0.9 m) above any forced air intake located within 10 ft (3 m). Note: this does not apply to the combustion air intake of a direct-vent appliance.

d.Provide a minimum of 1 foot distance from any door, operable window, or gravity intake into any building.

e.Provide a minimum of 1 foot clearance from the bottom of the exit terminal above the expected snow accumulation level. Snow removal may be necessary to maintain clearance.

f.Provide 4 feet horizontal clearance from electrical meters, gas meters, gas regulators, and relief equipment. In no case shall the exit terminal be above or below the aforementioned equipment unless the 4 foot horizontal distance is maintained.

g.Do not locate the exit terminal over public walkways where condensate could drip and/or freeze and create a nuisance or hazard.

h.When adjacent to a public walkway, locate exit terminal at least 7 feet above grade.

i.Do not locate the exit termination directly under roof overhangs to prevent icicles from forming.

j.Provide 3 feet clearance from the inside corner of adjacent walls.

2.Determine air intake pipe location.

a.Provide 1 foot clearance from the bottom of the air inlet pipe and the level of maximum snow accumulation. Snow removal may be necessary to maintain clearances.

b.Do not locate air intake pipe in a parking area where machinery may damage the pipe.

c.Maximum distance between air intake and exhaust vent is 6 feet (1.8 m). Minimum distance between exhaust vent and air intake on single Pinnacle is 8" (0.2 m) center-to-center. Minimum distance between vents and intakes on multiple Pinnacles is 8" (0.2 m) center-to-center. See Figure 5.2.

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PB Heat Gas Boiler manual Approved Materials for Exhaust Vent and Intake AIR Pipe, Exhaust Vent / AIR Intake Pipe Location
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