8
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 appliance not connected to the common
venting system. Turn on any exhaust fans, such as range
hoods and bathroom exhausts, so they will 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 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 remain-
ing connected to the common venting system properly
vents when tested as outlined above, return doorswindows,
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-latest revision.
When resizing any portion of the common venting system,
the common venting system should be resized to approach
the minimum size as determined using the appropriate
tables in Part 11 in the National Fuel Gas Code, ANSI
Z223.1-latest revision.
Vent Damper Operation
Vent connectors serving appliances vented by natural draft
shall not be connected into any portion of mechanical draft
systems operating under positive pressure.
FIG. 9
FIG. 10
FIG. 8 TYPICAL MASONRY CHIMNEY REQUIREMENTS
Summary of Contents for PVWB
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