# 47860A005
Page 6
When making ABS joints, pieces can be prepared with a
cleaner. When joining ABS to PVC materials, use PVC
solvent cement as specified in ASTM D3138.
Preferred fittings are DWV style or long sweep. Seal all
joints gas tight with appropriate cement. In areas where vent
and air intake pipes are exposed to abnormal stress or are
subject to damage, schedule 80 pipe should be used.
Category IV Furnace Limitations
This furnace shall
not
be connected to any Type B, BW,
or L vent or vent connector and shall
not
be connected to
any portion of a factory-built or masonry chimney.
This
furnace is not to be common vented with any other
appliance. The vent pipe must not be connected to a
chimney flue serving a separate appliance designed
to burn solid fuel.
For either type of installation (direct or non-direct vent),
special venting considerations must be followed. Refer to
the proper section in pages 10 – 14 for the type of furnace
and venting being installed.
The venting system must be supported with mounting
straps to prevent any weight load from being applied to
the vent blower. Horizontal vent pipe must be supported
every 5' and vertical pipe should be supported every 10' to
prevent sagging and provide rigid support.
When a furnace is installed as direct vent, provisions for
ventilation air should follow the same requirements as if
installed as non-direct vent. Proper ventilation air is
necessary to maintain furnace component temperatures
within acceptable limits.
All vents passing through floors, ceilings, and walls must
be installed in accordance with National Fuel Gas Code,
ANSI Z223.1/NFPA 54 (latest edition).
In all applications where the flue pipe is run through
an unconditioned space, 1/2
"
Armaflex or equivalent
must be used over the pipe. In extreme cold climates,
3/4
"
Armaflex is recommended.
Materials
All pipe, fittings, primer, and solvent cement must conform
with American National Standard Institute and the American
Society for Testing and Materials (ANSI/ASTM) standards.
The solvent shall be free flowing and contain no lumps,
undissolved particles, or any foreign matter that adversely
affects the joint strength or chemical resistance of the
cement. The cement shall show no gelation, stratification, or
separation that cannot be removed by stirring.
Refer to Table 2 for approved piping and fitting materials.
The primers and solvents used must also meet ASTM
specifications. PVC primer is specified in ASTM F656. Use
PVC solvent as specified in ASTM D2564 and ABS solvent
cement as specified ASTM D2235. Low temperature solvent
cement is recommended. Metal or plastic strapping may be
used for vent pipe hangers.
If at any time in the future the installation of
this furnace is changed to require outside
fresh air for combustion, the inlet air restrictor
plate must be removed. Failure to remove the
inlet air restrictor could cause improper
operation that can result in a fire hazard or
carbon monoxide injury.
WARNING
Table 2
Piping and Fitting Specifications
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