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11
Boilers connecting to gas vents or chimneys, vent
installations shall be in accordance with “Venting of
Equipment”, of the National Fuel Gas Code, ANSI
Z223.1/NFPA 54 or applicable provisions of the local
building codes.
Check Your Chimney
It must be clean, right size, properly constructed and
in good condition.
Chimney Sizing
Chimney sizing, and vent installation must be in
accordance with Part 7 and Part 11 of the National
Fuel Gas Code, ANSI Z223.1/NFPA 54 or applicable
provisions of local building codes.
This is a high ef
fi
ciency boiler with low stack
temperature. Following recommendations are in
addition to requirements of the National Fuel Gas
Code.
1. Type B double wall vent pipe is recommended for
vent connector. Single wall vent connectors should
not be used unless following conditions are true:
a) Except for basement, boiler is not installed in
unheated space.
b) Total horizontal portion of vent connector, not
including elbows is less than 5 feet in length.
2. Outside chimneys (i.e. chimneys exposed to
outdoors below roof line) should not be used unless
they are:
a) enclosed in a chase, or
b) lined with type B vent pipe, or listed
fl
exible
vent liner, or other certi
fi
ed chimney lining system
.
3. Where possible it is recommended to common vent
boiler and water heater.
4. For multiple boiler installations, consult boiler
manufacturer for venting recommendations.
Connecting The Vent Damper And Vent
Connector
Refer to Figure 1, page 2 for size and location of vent
(
fl
ue opening).
NOTICE
Damper blade on furnished vent damper has
1/2 square inch hole (approximately 3/4”
diameter). Boilers equipped with intermittent
ignition, hole should be plugged by using plug
supplied with vent damper.
Position furnished vent damper on top of
fl
ue
1.
outlet collar. Fasten damper securely to
fl
ue
outlet collar with sheet metal screws. Verify
damper blade has clearance to operate inside of
diverter. Do not modify either draft diverter or
vent damper during installation.
As An Option
Damper may be installed in any horizontal or
vertical position, closer to
fl
ue outlet collar
preferred. See Figures 8, 9 and 10.
Install vent damper to service only single boiler
2.
for which it is intended. Damper position indicator
shall be in visible location following installation.
Locate damper so it is accessible for servicing.
Damper must be in the open position when
3.
appliance main burners are operating.
Boiler is equipped with factory wired harness that
4.
plugs into vent damper.
Slope pipe up from boiler to chimney not less
5.
than 1/4” per foot.
Run pipe as directly as possible with as few
6.
elbows as possible.
Do not connect to
fi
replace
fl
ue.
7.
End of vent pipe must be
fl
ush with inside face of
8.
chimney
fl
ue. Use a sealed-in thimble for chimney
connection.
Fasten sections of vent pipe with sheet metal screws
to make piping rigid. Support horizontal potions of
vent system to prevent sagging. Use stovepipe wires
every 5’ to support pipe from above. Use double wall
vent pipe if vent pipe must go through crawl space.
Where vent pipe passes through combustible wall
or partition, use ventilated metal thimble. Thimble
7 - CHIMNEY AND VENT PIPE CONNECTION
WARNING
Boiler and venting installations shall be
performed by a quali
fi
ed expert and in
accordance with the appropriate manual.
Installing or venting boiler or other gas
appliance with improper methods or materials
may result in serious injury or death due to
fi
re or to asphyxiation from poisonous gases
such as carbon monoxide with is odorless and
invisible.
!
Содержание MGC-8D
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