Direct Vent - Vertical - Weil-McLain SlimFit Manual

SlimFit
™
commercial condensing gas
DIRECT VENT — Vertical
Figure 42
Vertical direct vent terminations (air termination can be vertical or sidewall as shown below)
Determine termination location
1. The vent and air terminations must be installed as shown in
Figure 42. 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 30, page 36.
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. Provide means to access the boiler air inlet as instructed on
page 46.
5. 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 43, page 46. Excessive
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.
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.
Part number 550-100-116/0713
-
fired water boiler
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 44, page 46).
3. For Canadian installations, provide clearances required by CSA
B149.1 or B149.2 Installation Code and a ULC S636 compliant
vent kit.
Install vent piping
WARNING
See
vent clamp on page 31. Verify that the seal is installed
correctly before inserting the vent manufacturer's
SlimFit Vent Adapter.
USE SWEEP ELBOWS FOR ALL VENT PIPINg
WhEN POSSIBLE — Short-radius elbows cause
higher pressure loss, resulting in less allowable
vent/air piping length. See Figure 27, page 30
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 manufac-
turer'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 mini-
mum of ¼ inch per foot in horizontal runs.
4. Support piping indepently 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/air pipe manufacturer's instructions.
— Boiler Manual
Use only the vent/air piping materials
and kits listed in Figure 28, page 31
Read and follow all instructions in this
manual. DO NOT proceed with vent/air
piping installation until you have read
page 28 through page 33 and page 40
through page 42
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 27, page 30
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.
about boiler vent/air outlet seals and
.
.
45