Weil-McLain SVF 1500 Manual page 34

SVF
™
Series 1
Commercial Condensing Gas-Fired Water Boiler — Boiler Manual
DIRECT EXHAUST — Vertical
Figure 27
Vertical direct exhaust termination
Determine termination location
1. The vent termination must be installed as shown in Figure 27.
2. The termination placement must comply with clearances and
limitations shown in Figure 28, page 35.
3. Locate the termination so is 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
piping from the boiler vent connection to the selected sidewall
location.
Multiple vent terminations
1. When terminating multiple SVF
connection as described in this manual.
2. Place wall penetrations to obtain minimum clearances shown in
Figure 27 for U. S. installations.
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
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 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 in the boiler vent outlet. Follow
all vent manufacturer's instructions.
2. Install a vent manufacturer reducer if needed to adapt to the vent
size being used.
34
TM
boilers, terminate each vent
listed in Figure 22, page 27
Read and follow all instructions in this
manual.
through page 35.
Locate the termination such that the total
vent piping from the boiler to the termi-
nation
Category IV venting.
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. 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 pipe manufacturer's instructions.
Install vent termination
1. Vent pipe penetration:
a. Cut a hole for the vent pipe.
b. For combustible construction, size the vent pipe hole at least
3/8" larger than the vent pipe diameter, or larger if specified by
the vent manufacturer.
c. For noncombustible construction, size the opening per vent
manufacturer instructions.
d. Insert a corrosion-resistant metal thimble in the vent pipe
hole.
e. Follow all local codes for isolation of vent pipe when passing
through floors, ceilings, and roofs.
2. Provide flashing and sealing boots sized for the vent pipe.
3. Use a coupling or open-end pipe termination, following vent
manufacturer's guidelines for vertical terminations.
4. Install a vent manufacturer's bird screen in the open end of the
termination.
5. Maintain the required dimensions of the finished termination
piping as shown in Figure 27.
Do not exceed the maximum length of the outside vent
piping shown in Figure 27. 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.
.
page 25
Figure 25, page 31
for
include a locking collar. Failure to
Part number 550-100-250/0819
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