Direct Vent - Vertical (Category Iv) - Weil-McLain SlimFit 2 Series Manual

SlimFit ® Series 2
DIRECT VENT — Vertical
(Category IV)
Figure 38
Vertical direct vent terminations (air termination can be vertical or sidewall as shown below).
Sidewall Air Intake Option
When venting is in the configuration of side wall air intake and through
the roof vent, the Combustion Air Pressure Switch Kit must be installed
on the boiler, See Replacement Parts Section, Figure 96, page 105.
The Combustion Air Pressure Switch Kit must be
installed. Otherwise nuisance lockouts will occur.
Determine termination location
1. The vent and air terminations must be installed as shown in
Figure 38. The air termination can be either through the roof
or through a side wall, as shown.
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 damaged
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. Provide means to access the boiler air inlet as instructed on
page 42.
6. Install the boiler in a location that allows proper routing of all
vent and air piping from the boiler vent and air connections to
the selected termination locations.
Do not exceed the maximum lengths of the outside
vent and air piping shown in Figure 39, page 42. Ex-
cessive 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 and for installations in very cold climates.
Multiple vent terminations
1. When terminating multiple SlimFit boilers, terminate each vent
connection as described in this manual. When using sidewall
air terminations, place terminations at least 6 inches apart.
Part number 550-100-561/0224
commercial condensing gas
- — Boiler Manual
fired water boiler
Use only the vent/air piping materials and
kits listed in Figure 22, page 25.
Read and follow all instructions in this manual.
DO NOT proceed with vent/air piping instal-
lation 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 termination will
not exceed the maximum length given in
Figure 24, page 29.
Comply with all vent system manufacturer's
instructions
Provide a vent manufacturer's SlimFit Vent
Adapter and reducer (if needed) at the boiler
vent connection.
Every joint on
must
locking collars could result in vent/air piping
leakage.
Terminate all vent pipes at the same height and all
air pipes at the same height to avoid possibility of
severe personal injury, death or substantial property
damage.
2. Place roof penetrations to obtain minimum clearance of
12 inches between edge of air intake elbow and adjacent vent
pipe of another boiler for U. S. installations (see Figure 40,
page 42).
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.
Install vent piping
WARNING
See
and vent clamp on page 24. Verify that the seal is
installed correctly before inserting the vent manu-
facturer's SlimFit Vent Adapter.
USE SWEEP ELBOWS FOR ALL VENT PIP-
ING WHEN POSSIBLE
cause higher pressure loss, resulting in less allow-
able vent/air piping length. See Figure 24, page 29
for maximum lengths and reductions required for
fittings.
1. Install the vent/air pipe manufacturer's SlimFit Vent Adapter
in the boiler vent and air outlets. Follow all vent/air pipe
manufacturer's instructions.
2. Install a vent/air pipe manufacturer's 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 sup-
ports 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/air pipe manufacturer's instructions.
polypropylene vent piping
include a locking collar. Failure to supply
about boiler vent/air outlet seals
— Short-radius elbows
41