420010970304 - LP-700 Rev. 000 Rel. 002 Date 4.21.21
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G. Exhaust Vent and Intake Pipe Installation
All joints of positive pressure vent systems must be sealed
completely to prevent leakage of flue products into the living
space. Failure to do so could result in property damage, serious
injury, or death.
WARNING
!
1. Use only solid PVC, CPVC, or stainless steel pipe or a Polypropylene
vent system approved for use with Category IV appliances.
ABS pipe material may be used on air inlet piping only.
2. Remove all burrs and debris from joints and fittings.
3. When using PVC or CPVC pipe, all joints must be properly cleaned,
primed, and cemented. Use only cement and primer approved for
use with the pipe material. Cement must conform to ASTM D2564
for PVC and ASTM F493 for CPVC pipe. NOTE: DO NOT CEMENT
POLYPROPYLENE PIPE.
4. Ensure the vent is located where it will not be exposed to prevailing
winds.
5. In all roof venting applications, exhaust discharge must point away
from the pitch of the roof.
6. If the exhaust vent is to be terminated in a walled off area (such
as a roof with a parapet wall), ensure the exhaust vent terminates
a minimum of 10’ from nearest wall and extends level with or
above the top of the wall. This will ensure flue gas does does not
get trapped and possibly recirculated into the intake air pipe, which
could contaminate the combustion air.
7. To prevent water leakage, install adequate roof flashing where the
pipe enters the roof.
8. Do not locate vent over public walkways, driveways, or parking
lots. Condensate could drip and freeze, resulting in a slip hazard or
damage to vehicles and machinery.
9. Due to potential moisture build-up, sidewall venting may not
be the preferred venting option. To save time and cost, carefully
consider venting installation and location.
10. Horizontal lengths of exhaust vent must slope back towards the
boiler not less than ¼” per foot to allow condensate to drain from the
vent pipe.
11. The exhaust vent must terminate where vapors cannot make
accidental contact with people or pets, or damage shrubs or plants.
12. In vacant chimney applications, install and seal a rain cap over
existing chimney openings.
13. All piping must be fully supported. Use pipe hangers at a
minimum of 4 foot intervals to prevent sagging of the pipe where
condensate may form.
14. Do not use the boiler to support any piping.
15. Ensure the outdoor exhaust vent and intake pipe terminations
are screened to prevent blockage caused by debris or birds. Vent
screens are included with this boiler.
16. Maximum Snow Level Determination: These installation
instructions reference snow levels in establishing a minimum height
for the installation of exhaust vent or air intake terminations. Snow
levels shall be determined as follows:
a. The installation location may, by ordinance, designate how snow
levels are calculated in that location; or
b. In the absence of specific ordinances, snow levels shall be
calculated from the average monthly maximum depth of snow
accumulation as indicated by the National Weather Service’s 10
year statistics for the installation location/geographical area.
In addition:
•
Total length of vent piping shall not exceed the limits specified
in this manual.
•
The vent piping for this direct vented appliance is approved for
zero clearance to combustible construction.
Figure 33 - Remove the Clamp
3. Insert the air intake pipe until it touches the bottom of the fitting.
4. Tighten the gear clamp using a screwdriver. See Figure 33.
Figure 34 - Air Intake Pipe Installed (Left Side Installation Demonstrated)
2. If using the right side connection, remove the gear clamp from
the left side connection and install it on the right side. See Figure 33.
You must cut out the plastic on the air intake connection being
used before installing the air intake pipe. Failure to do so will result
in improper boiler operation, property damage, severe personal
injury, or death.
WARNING
!