ECR 075 97gb, Installation, Operation & Maintenance Manual

Page: 20 / 80

20
6 - COMBUSTION AIR AND VENT PIPING
WARNING
Vent extending through exterior wall shall not
terminate adjacent to wall or below building
extensions such as eaves, balconies, parapets or
decks. Failure to comply could result in death or
serious injury.
!
6.4 Pipe Installation
• Minimum and maximum combustion air and vent pipe
lengths listed in Table 5. Pipe length counted from
combustion air connector to termination.
• Install field-sourced 2" to 3" transition, if used, in
vertical section at combustion air inlet and vent
connector.
• 90° elbows equivalent to 5.0 ft (1.6 m). 45° elbows
equivalent to 3.5 ft (1.1 m). 2" to 3" transition has no
equivalent length.
• Slope vent pipes minimum 1/4" per foot (21 mm/m)
back toward boiler. Support horizontal sections to
prevent sags capable of accumulating condensate.
• Support piping in accordance with pipe manufacturer's
instruction and authority having jurisdiction. In absence
of manufacturer's instruction use pipe hooks, pipe
straps, brackets, or hangers of adequate and strength
located at intervals of 4 ft (1.2m) or less. Allow for
expansion/contraction of pipe.
• Combustion air and vent piping must be air tight and
water tight.
• Certified vent system components must NOT be
interchanged with other vent systems or unlisted pipe/
fittings.
• Canadian installations only. All venting material, primer
and glue must be listed to ULC S636.
• Canadian installations only. First 3 ft (0.9 m) of
plastic vent pipe from vent connector must be readily
accessible for visual inspection.
6.5 Termination
• Terminate combustion air and vent pipes with fittings or
concentric vent kit.
• See "Parts, Kits and Optional Accessory" manual for
concentric vent kit part numbers.
• Use horizontal pipe for vent and 90° elbow for
combustion air termination when using fittings.
• Terminate combustion air and vent pipes in same
atmospheric pressure zone through exterior sidewall or
roof.
• Locate combustion air termination as far as possible from
swimming pool, swimming pool pump house, and other
sources of airborne chlorine.
• Locate combustion air and vent as required by authority
having jurisdiction.
Table 5 - Combustion Air and Vent Piping Length
Minimum/Maximum Vent Lengths
2” Pipe 3” Pipe
Model 075/100 075/100
Min.
6 ft.
(1.8 m)
6 ft.
(1.8 m)
Max.
50 ft.
(15.2 m)
100 ft.
(30.5 m)
Table 6 -Equivalent Length of Venting Components
Equivalent Length of Venting Components
Component Feet Meters
90° Elbow 5 1.6
45° Elbow 3 1/2 1.1
2" x 4" Adapter 0 0
3" x 4" Adapter 0 0
Concentric Vent Kit 5 1.6
Polypropylene Flexible Pipe per Foot 2 5/8 0.8