Page 179 - 2018_IFGC

APPENDIX D

building occupant to evacuate; the inspector shall D.4 Inspections to be performed with the appliance not
immediately evacuate and call 911. operating. The following safety inspection procedures are
performed on appliances that are not operating. These inspec-
(5) The CGD indicates a combustible gas level below
20% LEL, the inspection can continue. tions are applicable to all appliance installations.
(1) Preparing for Inspection. Shut off all gas and
If during the inspection process it is determined a condition electrical power to the appliances located in the same
exists that could result in unsafe appliance operation, shut off room being inspected. For gas supply, use the shutoff
the appliance and advise the owner of the unsafe condition. valve in the supply line or at the manifold serving
Where a gas leak is found that could result in an unsafe con- each appliance. For electrical power, place the circuit
dition, advise the owner of the unsafe condition and call the breaker in the off position or remove the fuse that
gas supplier to turn off the gas supply. The inspector should serves each appliance. A lock type device or tag
not continue a safety inspection on an operating appliance, should be installed on each gas shutoff valve and at
venting system, and piping system until repairs have been the electrical panel to indicate that the service has
made.
been shut off for inspection purposes.
D.3 Gas piping and connection inspections.
(2) Vent System Size and Installation. Verify that the
(1) Leak Checks. Conduct a test for gas leakage using existing venting system size and installation are
either a non-corrosive leak detection solution or a compliant with Chapter 5 of the International Fuel
CGD confirmed with a leak detection solution. Gas Code. The size and installation of venting
The preferred method for leak checking is by use of systems for other than natural draft and Category I
gas leak detection solution applied to all joints. This appliances should be in compliance with the
method provides a reliable visual indication of manufacturer’s installation instructions. Inspect the
significant leaks. venting system to determine that it is free of blockage,
restriction, leakage, corrosion, and other deficiencies
The use of a CGD in its audio sensing mode can that could cause an unsafe condition. Inspect masonry
quickly locate suspect leaks but can be overly sensitive chimneys to determine if they are lined. Inspect plastic
indicating insignificant and false leaks. All suspect venting system to determine that it is free of sagging
leaks found through the use of a CGD should be and it is sloped in an upward direction to the outdoor
confirmed using a leak detection solution.
vent termination.
Where gas leakage is confirmed, the owner should be (3) Combustion Air Supply. Inspect provisions for
notified that repairs must be made. The inspection combustion air as follows:
should include the following components:
a. No Direct-vent Appliances. Determine that non-
a. All gas piping fittings located within the direct vent appliance installations are compliant
appliance space.
with the combustion air requirements in Section
b. Appliance connector fittings. 304 of the International Fuel Gas Code. Inspect
c. Appliance gas valve/regulator housing and any interior and exterior combustion air openings
connections. and any connected combustion air ducts to
determine that there is no blockage, restriction,
(2) Appliance Connector. Verify that the appliance corrosion or damage. Inspect to determine that
connection type is compliant with Section 411 of the the upper horizontal combustion air duct is not
International Fuel Gas Code. Inspect flexible sloped in a downward direction toward the air
appliance connections to determine if they are free of supply source.
cracks, corrosion and signs of damage. Verify that
there are no uncoated brass connectors. Where b. Direct Vent Appliances. Verify that the
connectors are determined to be unsafe or where an combustion air supply ducts and pipes are
uncoated brass connector is found, the appliance securely fastened to direct vent appliance and
shutoff valve should be placed in the off position and determine that there are no separations, blockage,
the owner notified that the connector must be restriction, corrosion or other damage. Determine
replaced. that the combustion air source is located in the
outdoors or to areas that freely communicate to
(3) Piping Support. Inspect piping to determine that it is the outdoors.
adequately supported, that there is no undue stress on
the piping, and if there are any improperly capped c. Unvented Appliances. Verify that the total input
pipe openings. of all unvented room heaters and gas-fired
refrigerators installed in the same room or rooms
(4) Bonding. Verify that the electrical bonding of gas that freely communicate with each other does not
piping is compliant with Section 310 of the exceed 20 Btu/hr/ft .
3
International Fuel Gas Code.

1
U.S. Consumer Product Safety Commission, Responding to Residential Carbon Monoxide Incidents, Guidelines For Fire and Other Emergency Response Personnel,
Approved 7/23/02
166 2018 INTERNATIONAL FUEL GAS CODE 
Copyrighted © 2017 by, or licensed to, ICC (ALL RIGHTS RESERVED); licensed to UL, LLC pursuant to License Agreement with ICC. No further reproductions authorized or distribution authorized.
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