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12
Appliance details
Room sealed installation (TWIN PIPE SYSTEM)
Fig. 12
Combustion air pipe: ≤ 26 ft (8 m)
Exhaust vent pipe: ≤ 26 ft (8 m)
A condensate trap (drain tee) must be used in any side
wall installation if the total exhaust vent length is greater
than or equal to 5 feet (1.5 m), see page 14.
Fig. 13
Combustion air pipe: ≤ 26 ft (8 m)
Exhaust vent pipe: A+B+C ≤ 23½ ft (7.2 m)
A condensate trap (drain tee) must be used for any
vertical exhaust vent installation. The condensate trap
should be positioned as near to the top of the heater as
possible, see page 14.
Note: reduce 2½ ft for each 90° elbow used after the
first one, reduce 1 ¼ ft for each 45° elbow.
A maximum of three 90-degree elbows are permitted.
Open combustion installation (SINGLE PIPE
SYSTEM)
Fig. 14
Exhaust vent pipe: ≤ 26 ft (8 m)
A condensate trap (drain tee) must be used in any side
wall installation if the total exhaust vent length is greater
than or equal to 5 feet (1.5 m), see page 14.
Fig. 15
Exhaust vent pipe: A+B+C ≤ 23½ ft (7.2 m)
A condensate trap (drain tee) must be used for any
vertical exhaust vent installation. The condensate trap
should be positioned as near to the top of the heater as
possible, see page 14.
The exhaust vent system must vent directly to the
outside of the building and an adequate amount of
indoor combustion air must be provided for this
installation. See chapter 2.8.
Connecting a one piece 90 degree elbow pipe to the
combustion air inlet adaptor is recommended, this will
prevent debris or objects from ever falling into the inlet
opening.
Note: reduce 2½ ft for each elbow used after the first
one, reduce 1 ¼ ft for each 45° elbow.
A maximum of three 90-degree elbows are permitted.
i
Exhaust venting shall be done with 3”
stainless steel (AL29-4C) vent pipe.
i
The exhaust vent pipe and combustion air
pipe can be run vertically or horizontally.
Maximum length for each individual pipe is
26 feet (8 m) with one elbow, for each
additional 90° elbow after the first elbow
you must reduce 2½ feet from the total
vent length, or 1 ¼ feet for each 45°
elbow.