Page 871 - 2018_IRC

APPENDIX D

opened. Where it appears that the source of CO is a (3) Piping Support. Inspect piping to determine that it is
permanently installed appliance, advise the occupant adequately supported, that there is no undue stress on
to keep the appliance off and have the appliance ser- the piping, and if there are any improperly capped
viced by a qualified servicing agent. pipe openings.
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(3) Where CO detector indicates CO below 30 ppm the (4) Bonding. Verify that the electrical bonding of gas pip-
inspection can continue. ing is compliant with Section G2411 of the Interna-
(4) The CGD indicates a combustible gas level of 20-per- tional Fuel Gas Code.
cent LEL or greater. The inspector should immedi- D.4 Inspections to be performed with the Appliance Not
ately notify the occupant of the need for themselves Operating. The following safety inspection procedures are
and any building occupant to evacuate; the inspector performed on appliances that are not operating. These inspec-
shall immediately evacuate and call 911. tions are applicable to all appliance installations.
(5) The CGD indicates a combustible gas level below 20- (1) Preparing for Inspection. Shut off all gas and electri-
percent LEL, the inspection can continue. cal power to the appliances located in the same room
If during the inspection process it is determined a condition being inspected. For gas supply, use the shutoff valve
exists that could result in unsafe appliance operation, shut off in the supply line or at the manifold serving each
the appliance and advise the owner of the unsafe condition. appliance. For electrical power, place the circuit
Where a gas leak is found that could result in an unsafe con- breaker in the off position or remove the fuse that
dition, advise the owner of the unsafe condition and call the serves each appliance. A lock type device or tag
gas supplier to turn off the gas supply. The inspector should should be installed on each gas shutoff valve and at
not continue a safety inspection on an operating appliance, the electrical panel to indicate that the service has
venting system, and piping system until repairs have been been shut off for inspection purposes.
made. (2) Vent System Size and Installation. Verify that the
D.3 Gas Piping and Connection Inspections. existing venting system size and installation are com-
pliant with Chapter 5 of the International Fuel Gas
(1) Leak Checks. Conduct a test for gas leakage using Code. The size and installation of venting systems for
either a noncorrosive leak detection solution or a other than natural draft and Category I appliances
CGD confirmed with a leak detection solution. should be in compliance with the manufacturer’s
The preferred method for leak checking is by use of installation instructions. Inspect the venting system to
gas leak detection solution applied to all joints. This determine that it is free of blockage, restriction, leak-
method provides a reliable visual indication of signif- age, corrosion, and other deficiencies that could cause
icant leaks. an unsafe condition. Inspect masonry chimneys to
The use of a CGD in its audio sensing mode can determine if they are lined. Inspect plastic venting
quickly locate suspect leaks but can be overly sensi- system to determine that it is free of sagging and it is
tive indicating insignificant and false leaks. Suspect sloped in an upward direction to the outdoor vent ter-
leaks found through the use of a CGD should be con- mination.
firmed using a leak detection solution. (3) Combustion Air Supply. Inspect provisions for com-
bustion air as follows:
Where gas leakage is confirmed, the owner should
be notified that repairs must be made. The inspection a. Nondirect-vent Appliances. Determine that
should include the following components: non-direct vent appliance installations are
a. Gas piping fittings located within the appliance compliant with the combustion air require-
space. ments in Section G2407 of the International
b. Appliance connector fittings. Fuel Gas Code. Inspect any interior and exte-
rior combustion air openings and any con-
c. Appliance gas valve/regulator housing and nected combustion air ducts to determine that
connections. there is no blockage, restriction, corrosion or
(2) Appliance Connector. Verify that the appliance con- damage. Inspect to determine that the upper
nection type is compliant with Section G2422 of the horizontal combustion air duct is not sloped in
International Fuel Gas Code. Inspect flexible appli- a downward direction toward the air supply
ance connections to determine if they are free of source.
cracks, corrosion and signs of damage. Verify that b. Direct Vent Appliances. Verify that the com-
there are no uncoated brass connectors. Where con- bustion air supply ducts and pipes are securely
nectors are determined to be unsafe or where an fastened to direct vent appliance and determine
uncoated brass connector is found, the appliance shut- that there are no separations, blockage, restric-
off valve should be placed in the off position and the tion, corrosion or other damage. Determine
owner notified that the connector must be replaced. that the combustion air source is located in the

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U.S. Consumer Product Safety Commission, Responding to Residential Carbon Monoxide Incidents, Guidelines For Fire and Other Emergency Response Personnel,
Approved 7/23/02

846 2018 INTERNATIONAL RESIDENTIAL 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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