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VII. Venting (continued)
M. Removing Existing Appliance
When an existing appliance is removed from a common
venting system, the common venting system is likely to be
too large for proper venting of the remaining appliances. At
the time of removal of an existing appliance, the following
steps should be performed with each appliance remaining
connected to the common venting system. Make sure the
appliances are not in operation while carrying out these
steps.
1. Seal any unused openings in the common venting
system.
2. Visually inspect the venting system for proper
size and horizontal pitch and ensure there is no
blockage or restriction, leakage, corrosion, or other
deficiencies which could cause an unsafe condition.
3. Insofar as is practical, close all exterior doors and
windows, and all doors between the space where
the appliances connect to the common venting
system and other spaces of the building. Turn
on any exhaust fans, such as range-hoods and
bathroom exhausts, so they will operate at maxi-
mum speed. Do not operate a summer exhaust fan.
Close fireplace dampers.
4. Place in operation the appliance being inspected.
Follow the Lighting (or Operating) Instructions.
Adjust thermo stat 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.
6. After it has been determined that each appliance
connected to the common venting system properly
vents when tested as outlined above, return doors,
win dows, exhaust fans, fireplace dampers and
any other gas burning appliance to their previous
conditions 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 and/or the Natural Gas and
Propane Installation Code, CAN/CSA B149.1.
Resizing of any portion of the common venting
system, should be done in accordance with the
National Fuel Gas Code, ANSI Z223.1/NFPA 54 and/
or the Natural Gas and Propane Installation Code,
CAN/CSA B149.1.
32
NOTICE
NOTICE
Please note that the information provided in this
manual relative to the Canadian Standard is not meant
to be all-inclusive. Reading the entire Standard is
strongly suggested. The final approval of all system
designs must be acceptable to the authority having
jurisdiction.
AMP 400-1000L I&O Manual
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