Termination - Dunkirk DKVLT-050 Installation, Operation & Maintenance Manual

• Minimum and maximum combustion air and vent pipe
lengths listed in Table (4). Pipe length counted from
combustion air connector to termination.
• Install fi eld-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.
• Certifi ed vent system components must NOT be
interchanged with other vent systems or unlisted pipe/
fi ttings.

6.5 Termination

6 - COMBUSTION AIR AND VENT PIPING
Table 4 - Combustion Air and Vent Piping Length
Combustion Air and Vent Pipe Equivalent Length
2" Pipe
Model 050
6 ft.
Min.
(1.8 m)
100 ft.
Max.
(30.5 m)
1 - 90° elbow = 5 ft (1.6 m)
1 - 45° elbow = 3.5 ft (1.1 m)
1- 2" x 3" adapter = 0 ft (0 m)
Note: Concentric Vent Kit=5 ft (1.6m) equivalent length
For Example: Boiler can be installed on outside wall and vented with
1-90° elbow and 1 ft (0.30 m) of vent pipe.
• Terminate combustion air and vent pipes with fi ttings or
concentric vent kit.
• See "Parts, Kits and Optional Accessories" manual
for concentric vent kit part numbers.
• Use horizontal pipe for vent and 90° elbow for
combustion air termination when using fi ttings.
• 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 terminals as required by
authority having jurisdiction.
6.6 Condensate Piping
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.
075/100 075/100
6 ft. 6 ft.
(1.8 m) (1.8 m)
50ft. 100 ft.
(15.2 m) (30.5 m)
18
WARNING
!
3" Pipe
150/200
6 ft.
(1.8 m)
100 ft.
(30.5 m)