Direct Vent - Vertical Termination (Category Iv) - Weil-McLain SVF 725 Manual

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DIRECT VENT - Vertical Termination (Category IV)

1
Vertical Termination Location
The vent and air terminations must be installed
as shown in Figure 33 The air termination can be
through either the roof or a sidewall as shown The
termination placement must comply with clearances
2
and limitations shown on the following pages
1 Install the termination in a location where damage
from foreign objects and buildup of leaves or
sediment is unlikely
2 Ensure proper clearance above grade or
3
snow line Keep vents and air area clear of
accumulating snow
3 Install the boiler in a location that allows proper
routing of all vent piping from the boiler vent
connection to the selected sidewall location
WARNING
!
4
Locate the termination such that the total vent
piping from the boiler to the termination will not
exceed the maximum length given in Figure 24,
page 37 for Category IV venting. Failure to
comply can result in severe personal injury,
death, or substantial property damage.
5
Multiple Vent Terminations
When terminating multiple SVF boilers, terminate
each vent connection as described in this manual
See Figure 40, page 53 for typical sidewall air
6
termination layouts
For U S installations, place roof penetrations to
obtain a minimum clearance of 12" between edge of
air intake elbow and adjacent vent pipe of another
boiler as shown in Figure 35, page 49
For Canadian installations, provide clearances
required by Natural Gas and Propane Installation Code –
7
CAN/CSA B149 1 Use a ULC S636-compliant vent kit
IMPORTANT
Read and follow all instructions in this manual. Do
not proceed with vent installation until you have read
pages 29-36, 45-46, & 52. Comply with
8
all vent system manufacturer's instructions.
48
svf series
725/850
Figure 33 Vertical direct vent terminations
Vent Piping Installation
WARNING
!
Use only the vent materials and kits listed in
Table 9, page 34. Failure to comply can result
in severe personal injury, death, or substantial
property damage.
WARNING
!
Every joint on polypropylene vent piping must
include a locking collar. Failure to supply locking
collars could cause vent or air piping leakage,
resulting in severe personal injury or death.
WARNING
!
Use sweep elbows for all vent and air piping. DO
NOT use short-radius elbows for vent or air piping.
Failure to comply can result in severe personal
injury, death, or substantial property damage.
1 Install a vent adapter if needed Follow
instructions from the vent manufacturer
2 Install a reducer from a vent manufacturer if
needed to adapt to the vent size
3 Slope vent piping toward the boiler a minimum of
1/4" per foot in horizontal runs or larger per vent
pipe manufacturer's instructions
4 Support piping independently of the boiler Install
pipe supports every 5 ft on both the horizontal
and vertical runs Install a hanger support within
6" of any upturn in the piping
boiler manual
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