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440 01 2021 01
Vent Check
Draft Hood
Vent Pipe
Match
Typical Gas
Water Heater
Figure 6
If flame pulls towards draft hood, this indicates
sufficient venting.
For Two Pipe Installation
(Direct Vent)
This furnace can NOT be common vented or connected to any
type B, BW or L vent or vent connector, nor to any portion of a facto-
ry--built or masonry chimney. If this furnace is replacing a previous-
ly common-vented furnace, it may be necessary to resize the
existing vent and chimney to prevent oversizing problems for the
other remaining appliance(s). See
“Venting and Combustion Air
Check”
in this section
.
This furnace MUST be vented to the out-
side.
4. Vent and Combustion Air Piping
CARBON MONOXIDE POISONING HAZARD.
Failure to properly vent this furnace could result in
death or personal injury.
Use methods described here to provide combustion
and ventilation air.
!
WARNING
Dual Certified (*9MPT & *9MPV Models)
Direct or Non- Direct Vent
This furnace is certified as a Category
IV
furnace. This furnace can
be installed as a direct vent furnace using outside air for combus-
tion or the furnace can use air from inside the structure for combus-
tion. The
INLET
air pipe is optional. If combustion air comes from
inside the structure, adequate make up air
MUST
be provided to
compensate for oxygen burned. See
Confined Space Installa-
tion
in the
Combustion and Ventilation Air
chapter. If combus-
tion air is drawn from outside the structure, it
MUST
be taken from
the same atmospheric pressure zone as the vent pipe.
Contaminated Combustion Air
Installations in certain areas or types of structures will increase the
exposure to chemicals or halogens that may harm the furnace.
The following areas or types of structures may contain or have ex-
posure to the substances listed below. The installation must be
evaluated carefully as it may be necessary to provide outside air
for combustion.
·
Commercial buildings.
·
Buildings with indoor pools.
·
Furnaces installed in laundry rooms.
·
Furnaces installed in hobby or craft rooms.
·
Furnaces installed near chemical storage areas.
·
Permanent wave solutions for hair.
·
Chlorinated waxes and cleaners.
·
Chlorine based swimming pool chemicals.
·
Water softening chemicals.
·
De--icing salts or chemicals.
·
Carbon tetrachloride.
·
Halogen type refrigerants.
·
Cleaning solvents (such as perchloroethylene).
·
Printing inks, paint removers, varnishes, etc.
·
Hydrochloric acid.
·
Sulfuric Acid.
·
Solvent cements and glues
.
·
Antistatic fabric softeners for clothes dryers.
·
Masonry acid washing materials.
Vent and Combustion Air Piping Guidelines
This furnace is approved for venting with Schedule 40 PVC,
CPVC, ABS, Cellular Core pipe fittings and SDR--26 PVC.
Applicable ASTM Standards for Vent Materials
Materials
Sch. 40
Pipe
SDR
Pipe
Cell
Core
Pipe
Fittings
Primer
Solv.
Cement
ABS
D1527
__
F628
D2468
&
D2661
----
D2235
PVC
D1785
D2241
F891
D2466
&
D2665
F656
D2564
CPVC
F441
F442
----
F438
----
F493
ABS to
PVC
----
----
----
----
----
D3138
NOTE:
1) In Canada, all pipe, fittings & cements must conform to
applicable CSA standards or to local codes having jurisdiction.
2) Only use solvent cements that are marked for use with
the specific venting material.
3) ABS to PVC transition joints REQUIRE a special sol-
vent cement that meets the requirements of ASTM D3138.
4) Refer to ASTM D2855 for general procedure to use for
cementing plastic pipe and fittings.
NOTE
: In order to create a seal that allows future removal of pipe,
RTV sealant MUST be used on the inlet pipe
where it joins to the
furnace.
NOTE:
All vent piping
MUS
T be installed in compliance with local
codes or ordinances, these instructions, good trade practices, and
codes of country having jurisdiction.
1. Determine the best routing and termination for the vent pipe
and air inlet pipe by referring to all of the instructions and
guidelines in this Section.
2. Determine the size required for the vent pipe and air inlet
pipe.
3. Loosely assemble all venting parts without adhesive (pipe
joint cement) for correct fit before final assembly.
4. Furnace shall be installed so as to prevent the accumulation
of condensate.
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