12
When an existing boiler is removed from a common
venting system, the system is likely to be too large for the
proper venting of the appliances sill connected to it. If
this situation occurs, the following test procedure must be
followed:
1.
Vent pipe must slope upward from the boiler not
less then ¼ inch for every 1 foot (21mm/m) to vent
terminal.
2.
Horizontal portions of venting system shall be
supported rigidly every 5 feet and at elbows. No portion
of vent pipe should have dips or sags.
3.
This boiler series is classified as a Category I. Vent
installation 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.
4.
Inspect chimney to make certain it is constructed
according 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).
5.
Connect flue pipe from draft hood to chimney. Bolt or
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
ANSI Z223.13. Protect combustible ceiling and walls
near flue pipe with fireproof insulation. Where two or
more appliances vent into a common flue. Consult
NFPA 54 for common flue sizing. Alternatively, 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 INSTALLATION
VENT SYSTEM MODIFICATION
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
restriction, leakage, corrosion and other deficiencies
which could cause an unsafe condition.
3.
Insofar as is practical, close all building doors and
windows 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.
4.
Place in operation the appliance being inspected. Follow
the lighting instructions. Adjust thermostat so appliance
will operate continuously.
5.
Test for spillage at 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.
6.
After it has been determined each appliance remaining
connected to common venting system properly vents
when tested as outlined above, return doors, windows,
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
should be corrected so the installation conforms with
the National Fuel gas Code, ANSI Z223.1/NFPA 54.
When re-sizing any portion of the common venting
system, the common venting system should be re-sized
to approach the minimum size determined using the
appropriate tables in Chapter 13 of the National Fuel
Gas Code, ANSI Z223.1/NFPA 54.
WARNING
Boiler and venting installations shall be performed
by a qualified installer 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 fire or to asphyxiation from poisonous gases
such as carbon monoxide with is odorless and
invisible.
!
WARNING
Do not connect boiler to any portion of mechanical
draft system operating under positive pressure.
!
P/N
240009041
, Rev. C [04/30/2017]
