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INSTALLATION
!
WARNING
All information in this manual is for
reference and guidance purposes,
and does not substitute for required
professional training, conduct, and strict
adherence to applicable jurisdictional/
professional codes and regulations.
4
CAUTION
Do not use insulation on polypropylene
materials. Use of insulation may elevate pipe
wall temperatures, resulting in the potential
for vent material failure.
L
NOTE
Listing precludes direct vent witness test.
2-26
7. Air Intake pipes and ttings shall be Schedule 40 PVC pipe or smooth-
walled galvanized steel. All Schedule 40 PVC pipe, ttings, primer and
cement must conform to American National Standard Institute and the
American Society for Testing and Materials (ANSI/ASTM standards) per pipe
manufacturer's requirements.
8. Intake PVC piping must be assembled using cement. This will ensure that
the intake is air tight and will not allow contaminates from the boiler room
into the boiler. The cement must be free owing and contain no lumps,
undissolved particles or any foreign matter that adversely a ects the joint
strength or chemical resistance of the cement. The cement must not show
gelation, strati cation, or separation that cannot be removed by stirring.
9. Adhere to procedure for cementing joints (per ASTM D2855).
10. Avoid sidewall exhaust with roof terminated intake air. This may lead to
reverse stack e ect when the boiler is idle.
Combustion Air Filter
The air lter requires monthly maintenance and, at minimum, annual
replacement. See Maintenance section of this manual.
Flue Gas Exhaust Venting
This boiler is equipped with a vent connection at the lower rear of the boiler.
Adhere to National Fuel Gas Code (ANSI Z223.1) and the following for installation:
1. This boiler is a Category II/IV appliance, thus requiring special gas vent
material appropriate for condensing, positive pressure applications.
Any venting material supplied for the Endura boiler must be AL29-4C or
316L/444 SS, listed and labeled to UL 1738, and guaranteed appropriate for
the application by the manufacturer and supplier of the venting. It is also
acceptable to vent as Category II condensing, negative pressure, for which
an upsized diameter is typically required.
2. Where allowed by the authority having jurisdiction (AHJ), the exhaust may
be vented using Schedule 40 PVC, Schedule 40 CPVC, or Polypropylene
listed and labeled to UL 1738 or ULC S636. If venting with Schedule 40
PVC, at minimum the rst 8 inches of pipe must be Schedule 40 CPVC, see
Figure 19 and Table 8. Do not insulate plastic exhaust vents. Canada only:
Schedule 40 PVC, CPVC, or Polypropylene vent materials must be listed and
labeled to ULC S636.
3. Do not use boot tees or bullhead tees. Use inline condensate drains in
place of boot tees at the bottom of a vertical rise.
4. Barometric dampers are physically open to the mechanical space. When
used in a condensing boiler application with negative pressure (Category
II) exhaust vent, the design must prevent ue gas condensate from
draining down the outside of the stack or dripping into the space. For
installation using a barometric damper, verify the air openings meet the
SECTION 2
EDR-PURE-IOM-230608
© Fulton Group N.A., Inc. 2023
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