P-K THERMIFIC
®
Gas-Fired Boiler
23
3.5.5.6
Sealed Combustion Exhaust Vent Materials and Sizes
All flue gas outlet (exhaust vent) material must comply with UL-1738 or ULC S636 (Category II/III/IV
listed vent systems). The exhaust vent may be run horizontally or vertically. This boiler is certified for a
12” vent with a maximum length of
100 equivalent feet.
NOTICE! Standard B-vent
is not
approved.
3.5.5.7
Sealed Combustion Exhaust Vent Connection at the Boiler
The vacuum breaker should
be installed at the outlet of the
boiler. It must be secured to
the outlet collar by a minimum
of 4 sheet metal screws
spaced at approximately 90
degree intervals.
The silicone flap in the
vacuum breaker must be
facing down and flat (oriented
in the horizontal plane).
Gravity holds this flap closed
against the metal grid.
The horizontal distance
between the vacuum breaker
and the tee must be between
2 and 3 ft.
In transitioning from the
horizontal to the vertical, a
boot tee/135º tee must be
installed (not a standard tee).
NOTICE! A minimum vertical rise of 6 feet is required.
A drained tee is recommended for proper removal of the condensate. Corrosion resistant tubing rated
for at least 500° F should be securely attached to the drain connection.
The condensate drain line can be routed to a sewer, trap or condensate pump. Consult the vent
manufacturer's instructions for proper installation of drain line.
Do not
locate sidewall terminations over area of pedestrian or vehicular traffic due to potential
condensate dripping and ice build-up. See Section 3.5.3.6 Required Clearances for more information.
When joining double wall vent pipe and fittings, it is important to orient the female end of the section
toward the boiler. The male end is positioned away from the boiler towards the vent termination. Follow
the vent manufacturer's instructions for proper installation.
Содержание P-K THERMIFIC N700
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