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SlimFit
®
Series 2
DIRECT VENT — Sidewall
(Category IV)
Figure 34
Sidewall direct vent terminations — vent and air
Determine termination location
1. The vent termination must be installed as shown in Fig-
ure 34 and in Figure 37, page 40.
2. The termination placement must comply with clearances
and limitations shown in Figure 26, page 32.
3. Locate the terminations so they are not likely to be dam-
aged by foreign objects, such as stones or balls, or subject
to buildup of leaves or sediment.
4. Ensure proper clearance above grade or snow line. Keep
vents/air intake area clear of accumulating snow.
5. Install the boiler in a location that allows proper routing of
all vent and air piping from the boiler vent and air connec-
tions to the selected sidewall location.
Do not exceed the maximum lengths of the
outside vent piping shown in Figure 34. Exces-
sive length exposed to the outside could result in
freezing of condensate in the vent pipe or vent/air
piping failure. Follow vent/air pipe manufacturer's
instructions for proper protection and support of
the piping. In extremely cold climates, install an
insulated chase around the vent piping, particu-
larly when using longer lengths. (DO not insulate
nonmetallic vent pipe, if used.) The chase must
allow for inspection of the vent pipe, and insula-
tion must be protected from water.
Multiple vent terminations
1. When terminating multiple SlimFit boilers, terminate each
vent connection as described in this manual. See Fig-
ure 36, page 40 for a typical layout.
2. Place wall penetrations to obtain minimum clearances
shown in Figure 34 and in Figure 36, page 40 for U. S.
installations.
3. For Canadian installations, provide clearances required
by Natural Gas and Propane Installation Code - CAN/CSA
B149.1.
Installation Code and a ULC S636 compliant vent kit.
Part number 550-100-561/0224
commercial condensing gas
-
— Boiler Manual
fired water boiler
Install vent piping
See WARNING about boiler vent/air outlet seals
and vent clamp on page 24. Verify that the seal
is installed correctly before inserting the vent
manufacturer's SlimFit Vent Adapter.
USE SWEEP ELBOWS FOR ALL VENT AND
AIR PIPING WHEN POSSIBLE — Short-radius
elbows cause higher pressure loss, resulting
in less allowable vent/air piping length. See
Figure 24, page 29 for maximum lengths and
reductions required for fittings.
1. Install the vent manufacturer's SlimFit Vent Adapter in the
boiler vent outlet. Follow all vent manufacturer instructions.
2. Install a vent manufacturer reducer if needed to adapt to
the vent size being used.
3. Slope vent piping toward the boiler — slope vent piping a
minimum of ¼ inch per foot in horizontal runs or larger per
vent pipe manufacturer's instructions.
4. Support piping independently of the boiler — Install pipe
supports every 5 feet on both the horizontal and vertical
runs. Install a hanger support within 6 inches of any upturn
in the piping. Or follow vent pipe manufacturer's instruc-
tions.
Install vent termination fittings
1. Maintain the required dimensions of the finished termina-
tion piping as shown in Figure 27, page 33.
2. Air pipe penetration:
a. Cut a hole for the air pipe, sized per the vent/air pipe
manufacturer's instructions.
Use only the vent/air materials and kits
listed in Figure 22, page 25.
Read and follow all instructions in this
manual. DO NOT proceed with vent/
air installation until you have read
page 23 through page 32 and page 36
through page 38
Locate the termination such that the total
vent piping from the boiler to the termi-
nation will not exceed the maximum
length given in Figure 24, page 29.
Comply with all vent system manufac-
turer's instructions
Provide a vent manufacturer's SlimFit
Vent Adapter and reducer (if needed) at
the boiler vent connection.
polypropylene vent pip-
Every joint on
ing must
include a locking collar. Failure
to supply locking collars could result in
vent/air piping leakage.
39
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