Venting; Masonry Chimney Requirements - Carrier 58CU0A Series Installation, Start-Up, Operating And Service And Maintenance Instructions

VENTING

The furnace shall be connected to a listed factory built chimney
or vent, or a clay- -tile lined masonry or concrete chimney. Venting
into an unlined masonry chimney or concrete chimney is
prohibited.
When an existing Category I furnace is removed or replaced, the
original venting system may no longer be sized to properly vent
the attached appliances. An improperly sized Category I venting
system could cause the formation of condensate in the furnace
and vent, leakage of condensate and combustion products, and
spillage of combustion products into the living space.
WARNING
!
CARBON MONOXIDE POISONING HAZARD
Failure to follow the steps outlined below for each
appliance connected to the venting system being placed into
operation could result in carbon monoxide poisoning or
death. The following steps shall be followed for each
appliance connected to the venting system being placed into
operation, while all other appliances connected to the
venting system are not in operation:
1. Seal any unused openings in venting system.
2. Inspect the venting system for proper size and
horizontal pitch, as required in the current edition of
National Fuel Gas Code, ANSI Z223.1/NFPA 54
and these instructions. Determine that there is no
blockage or restriction, leakage, corrosion and other
deficiencies, which could cause an unsafe condition.
3. As far as practical, close all building doors and
windows and all doors between the space in which
the appliance(s) connected to the venting system are
located and other spaces of the building.
4. Close fireplace dampers.
5. Turn on clothes dryers and any appliance not
connected to the venting system. Turn on any
exhaust fans, such as range hoods and bathroom
exhausts, so they are operating at maximum speed.
Do not operate a summer exhaust fan.
6. Follow the lighting instructions. Place the appliance
being inspected into operation. Adjust the thermostat
so appliance is operating continuously.
7. Test for spillage from draft hood equipped
appliances at the draft hood relief opening after 5
minutes of main burner operation. Use the flame of a
match or candle.
8. If improper venting is observed during any of the
above tests, the venting system must be corrected in
accordance with the current edition of National Fuel
Gas Code, ANSI Z223.1/NFPA 54.
9. After it has been determined that each appliance
connected to the venting system properly vents when
tested as outlined above, return doors, windows,
exhaust fans, fireplace dampers and any other gas- -
fired burning appliance to their previous conditions
of use.
Vent system or vent connectors may need to be resized. Vent
systems or vent connectors, must be sized to approach minimum
size as determined using appropriate table found in the NFGC.
GENERAL VENTING REQUIREMENTS
Follow all safety codes for proper vent sizing and installation
requirements, including local building codes, the current edition
of National Fuel Gas Code ANSI Z223.1/NFPA 54 (NFGC),
Parts 12 and 13, the local building codes, and furnace and vent
manufacturers' instructions.
These furnaces are design- -certified as Category I furnaces in
accordance with current edition of ANSI Z21.47/CSA 2.3 and
operate with a non- -positive vent static pressure to minimize the
potential for vent gas leakage. Category I furnaces operate with a
flue loss not less than 17 percent to minimize the potential for
condensation in the venting system. These furnaces are approved
for common venting and multistory venting with other fan
assisted or draft hood equipped appliances in accordance with the
NFGC, the local building codes, and furnace and vent
manufacturers' instructions. The following information and
warning must be considered in addition to the requirements
defined in the NFGC.
1. If a vent (common or dedicated) becomes blocked, the
furnace will be shut off by the draft safeguard switch
located on the vent elbow.
2. Do not vent this Category I furnace into a single- -wall
dedicated or common vent. The dedicated or common
vent is considered to be the vertical portion of the vent
system that terminates outdoors.
3. Vent connectors serving Category I furnaces shall not be
connected into any portion of a mechanical draft system
operating under positive pressure.
4. Do not vent this appliance with any solid fuel burning
appliance.
5. Category I furnaces must be vented vertically or nearly
vertically unless equipped with a listed power venter.
6. Do not vent this appliance into an unlined masonry
chimney. Refer to Chimney Inspection Chart, Fig. 31.

MASONRY CHIMNEY REQUIREMENTS

If a clay tile- -lined masonry chimney is being used and it is
exposed to the outdoors below the roof line, relining might be
required. Chimneys shall conform to the Standard for Chimneys,
Fireplaces, Vents, and Solid Fuel Burning Appliances current
edition of ANSI/NFPA 211 and must be in good condition.
USA - - Refer to Sections 13.1.8 and 13.2.20 of the current edition
of NFGC NFPA54/ANSI Z223.1 or the authority having
jurisdiction to determine whether relining is required. If relining
is required, use a properly sized listed metal liner, Type- -B vent,
or a listed alternative venting design.
NOTE: See the current edition of NFPA54/ANSI Z223.1, 13.1.8
and 13.2.20 regarding alternative venting design and the
Exception.
This furnace is permitted to be vented into a clay tile- -lined
masonry chimney that is exposed to the outdoors below the roof
line, provided:
1. Vent connector is Type- -B double- -wall, and
2. This furnace is common vented with at least 1 draft hood
equipped appliance, and
3. The combined appliance input rating is less than the maxi-
mum capacity given in Table 8, and
4. The input rating of each space heating appliance is greater
than the minimum input rating given in Table 7 for the lo-
cal 99% Winter Design Temperature. Chimneys having in-
ternal areas greater than 38 square inches require furnace
input ratings greater than the input ratings of these fur-
naces. See footnote at bottom of Table 7, and
5. The authority having jurisdiction approves.
If all of these conditions cannot be met, an alternative venting
design shall be used, a listed chimney- -lining system, or a Type- -B
common vent.
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