Vent & Combustion Air Piping; Direct Or Non- Direct Vent - ICP *9MPT050F12 Installation Instruction

Figure 6
Vent Check
Vent Pipe
Typical Gas
Water Heater
If flame pulls towards draft hood, this indicates
sufficient venting.
4. Vent and Combustion Air Piping
WARNING
!
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.
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.
440 01 2021 01
Draft Hood
Match
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.
·
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
Sch. 40 SDR
Materials
Pipe Pipe
ABS D1527 __
PVC D1785 D2241
CPVC F441 F442
ABS to
---- ----
PVC
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 MUST 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.
.
Cell
Solv.
Core Fittings Primer
Cement
Pipe
D2468
F628 & ---- D2235
D2661
D2466
F891 & F656 D2564
D2665
---- F438 ---- F493
---- ---- ---- D3138
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