Weil-McLain 2 Series Manual page 41

®
SlimFit Series 2
DIRECT VENT — Vertical
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 Fig-
ure 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 limita-
tions 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 se-
lected termination locations.
Do not exceed the maximum lengths of the outside vent
and air piping shown in Figure 39, page 42. 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.
Part number 550-100-180/0917
COMMERCIAL CONDENSING GAS
- — Boiler Manual
FIRED WATER BOILER
Read and follow all instructions in this manual.
and page 36 through page 38
Locate the termination such that the total vent
piping from the boiler to the termination
instructions.
Provide a vent manufacturer's SlimFit Vent
Adapter and reducer (if needed) at the boiler vent
connection.
Every joint on
include a locking collar. Failure to supply
locking collars could result in vent/air piping leak-
age.
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 Installa-
tion Code and a ULC S636 compliant vent kit.
Install vent piping
See
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 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/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 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.
.
through
.
about boiler vent/air outlet seals and
-
will
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