Combustion- -Air And Vent Pipe Systems - Carrier 58UVB series Installation, Start-Up, And Operating Instructions Manual

CAUTION
!
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 National Fuel Gas Code, ANSI
Z223.1- -2002/NFPA 54- -2002 or the CSA B149.1, Natural
Gas and Propane Installation Code 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 National Fuel
Z223.1- -2002/NFPA 54- -2002 and/or CSA B149.1, Natural
Gas and Propane Installation Code.
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.
Step 9 —Combustion Air and Vent Pipe Systems
GENERAL
Vent system or vent connectors of other appliances may need to
be resized. For any other appliances when resizing vent systems
or vent connectors, system or connector must be sized to
approach minimum size as determined using appropriate table
found in the NFGC or NSCNGPIC.
The 58UVB can be vented as either a direct vent furnace or as an
optional ventilated combustion air application. A direct vent
system shall be installed in accordance with the direct vent
(2- -pipe) procedures in the following Combustion Air and Vent
Pipe Systems section. For optional ventilated combustion air
applications, refer to the ventilated combustion air option
procedures in the same section. Common venting prohibited.
DIRECT VENT/2- -PIPE SYSTEM
In a direct- -vent (2- -pipe) system, all air for combustion is taken
directly from outdoor atmosphere, and all flue products are
discharged to outdoor atmosphere. Combustion- -air and vent
pipes must terminate together in the same atmospheric pressure
zone, either through the roof or a sidewall (roof termination
preferred). A factory accessory vent termination kit MUST be
used in a direct vent (2- -pipe) system. See Table 6. See Fig. 34
for required clearances.
Gas Code, ANSI
VENTILATED COMBUSTION AIR OPTION
In a ventilated combustion air option, the vent terminates and
discharges the flue products directly to the outdoors similar to a
direct vent system. See Fig. 35 for required clearances. All air
for combustion is piped directly to the furnace from a space that
is well ventilated with outdoor air (such as an attic or crawl space)
and the space is well isolated from the living space or garage.
MATERIALS
Combustion- -air and vent pipe, fittings, primers, and solvents
must conform to American National Standards Institute (ANSI)
standards and American Society for Testing and Materials
(ASTM) standards. See Table 5 for approved materials for use in
the U.S.A.
WARNING
!
FIRE AND EXPLOSION HAZARD
Failure to follow this warning could result in fire,
property damage, personal injury, or death.
Solvent cements are combustible. Keep away from heat,
sparks, and open flame. Use only in well ventilated
areas. Avoid breathing in vapor or allowing contact
with skin or eyes.
In Canada, construct all combustion- -air and vent pipes for this
unit of CSA or ULC listed schedule- -40 PVC, PVC- -DWV or
ABS- -DWV pipe and pipe cement. SDR pipe is NOT approved in
Canada.
WARNING
!
CARBON MONOXIDE POISONING HAZARD
Failure to follow this warning could result in property
damage, personal injury, or death.
All combustion- -air and vent pipes must be airtight and
watertight. Pipes must also terminate exactly as shown
in Fig. 31 for direct vent (2- -pipe) system or Fig. 32 for
ventilated combusion air option.
An abandoned masonry chimney may be used as a raceway for
properly insulated and supported
applicable) and vent pipes. Each furnace must have its own set of
combustion- -air and vent pipes and be terminated individually, as
shown in Fig. 31 for Direct Vent (2- -Pipe) system or Fig. 32 for
ventilated combusion air option.
A furnace shall not be connected to a chimney flue serving a
separate appliance designed to burn solid fuel.
Other gas appliances with their own venting system may also use
the abandoned chimney as a raceway providing it is permitted by
local code, the current edition of the National Fuel Gas Code and
the vent or liner manufacturer's installation instructions. Care
must be taken to prevent the exhaust gases from one appliance
from contaminating the combustion air of other gas appliances.
Do not take combustion air from inside the chimney when using
the Ventilated Combustion Air option.
18
combustion- -air (when