Page 182 - 2018_IFGC

APPENDIX D

(4) Cooking Appliances: b. OFF. Inspect for excess amounts of lint around
the dryer and on dryer components. Inspect that
a. OFF. Inspect oven cavity and range-top exhaust
vent for blockage with aluminum foil or other there is a lint trap properly installed and it does
not have holes or tears. Verify that it is in a clean
materials.
condition.
b. OFF. Inspect cook top to verify that it is free from
a build-up of grease. c. OFF. Inspect visible portions of the exhaust duct
and connections for loose fittings and
c. ON. Measure the CO above each burner and at connections, blockage, and signs of corrosion.
the oven exhaust vents after 5 minutes of burner Verify that the duct termination is not blocked
operation. The CO should not exceed threshold in and that it terminates in an outdoor location.
Table D.6. Verify that only approved metal vent ducting
material is installed (plastic and vinyl materials
(5) Vented Room Heaters:
are not approved for gas dryers).
a. OFF. For built-in room heaters and wall furnaces,
inspect that the burner compartment is free of lint d. ON. Verify mechanical components including
and debris. drum and blower are operating properly.
b. OFF. Inspect that furnishings and combustible e. ON. Operate the clothes dryer and verify that
building components are not blocking the heater. exhaust system is intact and exhaust is exiting the
termination.
c. ON. Measure the CO in the vent after 5 minutes
of main burner operation. The CO should not f. ON. Measure the CO at the exhaust duct or
exceed threshold in Table D.6. termination after 5 minutes of main burner
operation. The CO should not exceed threshold in
(6) Vent-free (Unvented) Heaters: Table D.6.
a. OFF. Verify that the heater input is not more than TABLE D.6
40,000 Btu input, but not more than 10,000 Btu CO THRESHOLDS
where installed in a bedroom, and 6,000 Btu Boilers (all categories) 400 ppm air free
where installed in a bathroom.
Central Furnace (all categories) 400 ppm air free 2, 3
1
b. OFF. Inspect the ceramic logs provided with gas
log type vent free heaters that they are properly Floor Furnace 400 ppm air free
located and aligned. Gravity Furnace 400 ppm air free
c. OFF. Inspect the heater that it is free of excess Wall Furnace 200 ppm air free
lint build-up and debris. Wall Furnace (Direct Vent) 400 ppm air free
d. OFF. Verify that the oxygen depletion safety Vented Room Heater 200 ppm air free
shutoff system has not been altered or bypassed. Vent-Free Room Heater 200 ppm air free
e. ON. Verify that the main burner shuts down Water Heater 200 ppm air free
within 3 minutes by extinguishing the pilot light. Oven/Broiler 225 ppm as measured
The test is meant to simulate the operation of the Top Burner 25 ppm as measured (per burner)
oxygen depletion system (ODS).
Clothes Dryer 400 ppm air free
f. ON. Measure the CO after 5 minutes of main
burner operation. The CO should not exceed Refrigerator 25 ppm as measured
threshold in Table D.6. Gas Log (gas fireplace) 25 ppm as measured in vent
(7) Gas Log Sets and Gas Fireplaces: Gas Log (installed in wood 400 ppm air free in firebox
burning fireplace)
a. OFF. For gas logs installed in wood burning
1 Parts per million
fireplaces equipped with a damper, verify that the
2 Air free emission levels are based on a mathematical equation (involving
fireplace damper is in a fixed open position.
carbon monoxide and oxygen or carbon dioxide readings) to convert an
b. ON. Measure the CO in the firebox (log sets actual diluted flue gas carbon monoxide testing sample to an undiluted air
installed in wood burning fireplaces or in the vent free flue gas carbon monoxide level utilized in the appliance certification
standards. For natural gas or propane, using as-measured CO ppm and O
(gas fireplace) after 5 minutes of main burner percentage: 2
operation. The CO should not exceed threshold in
20.9

Table D.6. CO AFppm =   -----------------------  CO ppm
O 
(8) Gas Clothes Dryer: 20.9 – 2
where:
a. OFF. Where installed in a closet, verify that a CO = Carbon monoxide, air-free ppm.
source of make-up air is provided and inspect AFppm
that any make-up air openings, louvers, and ducts CO ppm = As-measured combustion gas carbon monoxide ppm.
are free of blockage. O 2 = Percentage of oxygen in combustion gas, as a percentage.
2018 INTERNATIONAL FUEL GAS CODE  169
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