Weil-McLain SVF 1500 Manual page 41

SVF
™
Series 1
Commercial Condensing Gas-Fired Water Boiler — Boiler Manual
DIRECT VENT — Sidewall
Figure 35
Sidewall direct vent terminations — vent and air
Determine termination location
1. The vent termination must be installed as shown in Figure 35 and
in Figure 37, page 42.
2. The termination placement must comply with clearances and
limitations shown in Figure 28, page 35.
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. 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 sidewall location.
Do not exceed the maximum lengths of the outside vent
piping shown in Figure 35. 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. In extremely cold climates,
install an insulated chase around the vent piping, par-
ticularly when using longer lengths. (DO not insulate
nonmetallic vent pipe, if used.) The chase must allow
for inspection of the vent pipe, and insulation must be
protected from water.
Multiple vent terminations
1. When terminating multiple SVF
connection as described in this manual. See Figure 36, page 42
for a typical layout.
2. Place wall penetrations to obtain minimum clearances shown in
Figure 35 and in Figure 36, page 42 for U. S. installations.
Part number 550-100-250/0819
TM
boilers, terminate each vent
listed in Figure 22, page 27
Read and follow all instructions in this
manual.
page 25 through page 35 and page 38
through page 40.
Locate the termination such that the total
vent piping from the boiler to the termi-
nation
turer's instructions.
Provide a vent manufacturer's Vent Adapter
and reducer (if needed) at the boiler vent
connection.
Every joint on
ing must
supply locking collars could result in vent/
air piping leakage.
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
USE SWEEP ELBOWS FOR ALL VENT AND AIR
PIPING WHEN POSSIBLE — Short-radius el-
bows cause higher pressure loss, resulting in less
allowable vent/air piping length. See Figure 25,
page 31 for maximum lengths and reductions
required for fittings.
1. Install the vent manufacturer's vent adapter, if needed to adapt to
the vent size/material being used. Follow all vent manufacturer's
instructions.
2. 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.
3. 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 pipe manufacturer's instructions.
Install vent termination fittings
1. Maintain the required dimensions of the finished termination
piping as shown in Figure 29, page 36.
2. Air pipe penetration:
a. Cut a hole for the air pipe, sized per the vent/air pipe manu-
facturer's instructions.
.
Figure 25, page 31
.
include a locking collar. Failure to
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