Figure 38
Vertical direct vent terminations (air termination can be vertical or sidewall as shown below).
5SEONLYTHEVENTAIRPIPINGMATERIALSANDKITS
listed in Figure 22, page 27
.
Read and follow all instructions in this manual.
$/./4PROCEEDWITHVENTAIRPIPINGINSTAL
-
LATION UNTIL YOU HAVE READ
page 25 through
page 35 and page 38 through page 40.
Locate the termination such that the total vent pip-
ing from the boiler to the termination
WILLNOTEX
-
CEEDTHEMAXIMUMLENGTHGIVENIN
Figure 25,
page 31
.
#OMPLYWITHALLVENTSYSTEMMANUFACTURERS
instructions.
Provide a vent manufacturer’s vent adapter and
reducer (if needed) at the boiler vent connection.
Every joint on
POLYPROPYLENEVENTPIPING
must
include a locking collar. Failure to supply locking
collars could result in vent/air piping leakage.
SVF
™
Series 1
Commercial Condensing Gas-Fired Water Boiler
— Boiler Manual
Part number 550-100-250/0819
43
DIRECT VENT — Vertical
#ATEGORY)6
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 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 se-
lected termination locations.
Do not exceed the maximum lengths of the outside vent
and air piping shown in Figure 40, page 44. 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
SVF
TM
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.
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 39, page 44).
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 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. 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/air pipe manufacturer’s instructions.
