Installation Instructions Comfort Bridge Models

12
note: requIreMent Does not aPPlY to tHe
coMBustIon aIr PIPe.
As an alternative to PVC pipe, primer, solvent cement, and
ttings, ABS materials which are in compliance with the
following specications may be used. Two-or-three-inch
ABS Schedule 40 pipe must meet ASTM D1527 and, if
used in Canada, must be CSA listed. Solvent cement for
ABS to ABS joints must meet ASTM D2235 and, if used
in Canada, must be CSA listed. The solvent cement for
the PVC to ABS transition joint must meet ASTM D3138.
Fittings must be DWV type ttings meeting ASTM D2661
and ASTM D3311 and, if used in Canada, must be CSA
listed. Carefully follow the manufacturers’ instructions for
cutting, cleaning, and solvent cementing PVC and/or ABS.
All 90° elbows must be medium radius (1/4 bend DWV) or
long radius (Long sweep 1/4 bend DWV) types conforming
to ASTM D3311. A medium radius (1/4 bend DWV) elbow
measures 3 1/16” minimum from the plane of one opening
to the center line of the other opening for 2” diameter pipe,
and 4 9/16” minimum for 3” pipe.
ProPer Vent/flue anD coMBustIon aIr PIPIng PractIces
Adhere to these instructions to ensure safe and proper
furnace performance. The length, diameter, and number
of elbows of the vent/ue pipe and combustion air pipe
(when applicable) affects the performance of the furnace
and must be carefully sized. All piping must be installed in
accordance with local codes and these instructions.
WARNING
to aVoID BoDIlY InjurY, fIre or exPlosIon, solVent
ceMents Must Be kePt awaY froM all IgnItIon
sources (I.e., sParks, oPen flaMes, anD excessIVe
Heat) as tHeY are coMBustIBle lIquIDs. aVoID
BreatHIng ceMent VaPors or contact wItH skIn
anD/or eYes.
PREFERRED
fIgure 4
It is the responsibility of the installer to follow the
manufacturers’ recommendations and to verify that all vent/
ue piping and connectors are compatible with furnace ue
products. Additionally, it is the responsibility of the installer
to ensure that all piping and connections possess adequate
structural integrity and support to prevent ue pipe
separation, shifting, or sagging during furnace operation.
WARNING
uPon coMPletIon of tHe furnace InstallatIon,
carefullY InsPect tHe entIre flue sYsteM BotH
InsIDe anD outsIDe of tHe furnace to assure It Is
ProPerlY sealeD. leaks In tHe flue sYsteM can
result In serIous Personal InjurY or DeatH Due
to exPosure to flue ProDucts, IncluDIng carBon
MonoxIDe.
WARNING
faIlure to follow tHese InstructIons can result
In BoDIlY InjurY or DeatH. carefullY reaD anD
follow all InstructIons gIVen In tHIs sectIon.
Dual certIfIcatIon: non-DIrect/DIrect Vent
This furnace is dual certied and may be installed as a
non-direct vent (single pipe) or direct vent (dual pipe)
appliance. A non-direct vent installation requires only a
vent/ue pipe, while a direct vent installation requires both
a vent/ue pipe and a combustion air intake pipe. Refer
to the appropriate section for details concerning piping
size, length, number of elbows, furnace connections, and
terminations.
MaterIals anD joInIng MetHoDs
Two-three-inch nominal diameter PVC Schedule 40
pipe meeting ASTM D1785, PVC primer meeting ASTM
F656, and PVC solvent cement meeting ASTM D2564
specications must be used. Fittings must be DWV type
ttings meeting ASTM D2665 and ASTM D3311. Carefully
follow the manufacturer’s instructions for cutting, cleaning,
and solvent cementing of PVC.
The use of Schedule 40 PVC cellular core DWV meeting
ASTM F891 or ABS cellular core (Foam Core) plastic pipe
is also acceptable as a ue/vent and intake pipe material.
PVC primer meeting ASTM F656 and PVC solvent cement
meeting ASTM D2564 specications must be used.
Fittings must be DWV type ttings meeting ASTM D2665
and ASTM D3311. Carefully follow the manufactures
instructions for cutting, cleaning and solvent cementing of
PVC.
For Canadian installations; eld supplied PVC venting
materials must be UL S636 listed.