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All installations of boilers and venting should be done only by a qualified expert and in accordance
with the appropriate manual. Installing or venting a boiler or any other gas appliance with improper
methods or materials may result in serious injury or death due to fire or to asphyxiation from poison-
ous gases such as carbon monoxide with is odorless and invisible.
This boiler shall not be connected to any portion of a mechanical draft system operating under
positive pressure.
The vent pipe must slope upward from the boiler not less
1.
then ¼ inch for every 1 foot to the vent terminal.
Horizontal portions of the venting system shall be sup-
2.
ported rigidly every 5 feet and at the elbows. No portion of
the vent pipe should have any dips or sags.
This boiler series is classified as a Category 1 and the
3.
vent installation shall be in accordance with latest revision
of the National Fuel Gas Code noted above or applicable
provisions of the local building codes.
4.
Inspect chimney to make certain it is constructed ac-
cording to NFPA 211. The vent or vent connector shall
be Type B or metal pipe having resistance to heat and
corrosion not less than that of galvanized sheet steel or
aluminum not less than 0.016 inch thick (No. 28 Ga).
When an existing boiler is removed from a common vent-
ing system, the system is likely to be too large for the proper
venting of the appliances still connected to it. If this situation
occurs, the following test procedure must be followed:
REMOVAL OF BOILER FROM VENTING SySTEM
At the time of removal of an existing boiler, the following steps
shall be followed with each appliance remaining connected
to the common venting system placed in operation, while the
other appliances remaining connected to the common venting
system are not in operation.
1.
Seal an unused opening in the common venting system.
2.
Visually inspect the venting system for proper size and
horizontal pitch and determine there is no blockage or re-
striction, leakage, corrosion and other deficiencies which
could cause an unsafe condition.
Insofar as is practical, close all building doors and win-
3.
VENT INSTALLATION
WARNING
!
WARNING
!
Connect flue pipe from draft hood to chimney. Bolt or
5.
screw joints together to avoid sags. Flue pipe should
not extend beyond inside wall of chimney. Do not install
manual damper in flue pipe or reduce size of flue outlet
except as provided by the latest revision of ANSIZ223.1.
Protect combustible ceiling and walls near flue pipe with
fireproof insulation. Where two or more appliances vent
into a common flue, the area of the common flue must
be at least equal to the area of the largest flue plus 50
percent of the area of each additional flue.
VENT SySTEM MODIFICATION
dows and all doors between the space in which the
appliances remaining connected to the common venting
system are located and other spaces of the building. Turn
on clothes dryers and any other appliance not connected
to the common venting system. Turn on any exhaust fans,
such as range hoods and bathroom exhausts, so they
operate at maximum speed. Do not operate a summer
exhaust fan. Close fireplace dampers.
Place in operation the appliance being inspected. Follow
4.
the lighting instructions. Adjust thermostat so appliance
will operate continuously.
5.
Test for spillage at the draft hood relief opening after 5
minutes of main burner operation. Use the flame of a
match or candle, or smoke from a cigarette, cigar or pipe.
After it has been determined that each appliance remain-
6.
ing connected to a common venting system properly
vents when tested as outlined above, return doors, win-
dows, exhaust fans, fireplace dampers and any other gas
burning appliances to their previous condition of use.
7.
Any improper operation of the common venting system
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