Installtheremainingventandcombustionairpipesasshown
below.It isrecommendedthatallpipesbecut,prepared,and
preassembledbeforepermanentlycementinganyjoint.
1.Workingfromfurnaceto outside,cutpipeto required
length(s).
2.De-burrinsideandoutsideofpipe.
3.Chamferoutsideedgeofpipefor betterdistributionof
primerandcement.
4.Cleananddryallsurfacestobejoined.
5.Checkdryfitofpipeandmarkinsertiondepthonpipe.
6.Inserttheventpipeintotheventelbow.
7.Torqueclamponventelbow15Ib-in.
8.Torqueclamponventcoupling15Ib-in.
9.Insertthecombustionairpipeintotheadapter.
10.Pilotdrilla screwholethroughthe adapterintothe
combustionairpipeandsecurethepipetotheadapter
with sheetmetalscrews.DO NOTDRILLINTO
POLYPROPYLENEVENTPIPES.Usean optional
accessoryventcoupling,ifneeded.
11.Sealaroundthecombustionairpipewithsiliconeorfoil
tape. SILICONESEALERSMAY NOT BE
APPROPRIATEFOR POLYPROPYLENEVENT
SYSTEMS.SEEPOLYPROPYLENEVENTSYSTEM
MANUFACTRUER'SINSTRUCTIONS.
12.Afterpipeshavebeencutandpreassembled,apply
generouslayerofcementprimertopipefittingsocket
and end of pipeto insertionmark.Quicklyapply
approvedcementtoendofpipeandfittingsocket(over
primer).Applycementinalight,uniformcoatoninsideof
socketto preventbuildupof excesscement.Apply
secondcoat.DONOTCEMENTPOLYPROPYLENE
FITTINGS.
13.Whilecementis stillwet,twistpipeintosocketwith
1/4-in.turn.Besurepipeis fullyinsertedintofitting
socket.
14.Wipeexcesscementfromjoint.A continuousbeadof
cementwillbevisiblearoundperimeterofa properly
madejoint.
15.Handlepipejointscarefullyuntilcementsets.
16.Horizontalportionsof the ventingsystemshallbe
supportedtopreventsagging.Supportcombustionair
pipingandventpipingaminimumofevery5ft.(1.5M)[3
ft. (.91M)for SDR-21or -26 PVC]usingperforated
metalhangingstraporcommerciallyavailablehangars
designedtosupportplasticpipe.
17.Preventcondensatefromaccumulatinginthepipesby
slopingthe combustionair pipingandventpiping
downwardtowardsfurnacea minimumof 1/4-in.per
linearft.withnosagsbetweenhangers.
18.Completetheventandcombustionairpipeinstallation
byconnectingtotheconcentricventorbyinstallingthe
requiredterminationelbowsasshowninFigure49and
Figure 50, Alberta Figure 46 and Figure 48. For
ventilated combustion air terminations, refer to Figure 58
and Figure 59.
19. Use appropriate methods to seal openings where
combustion air pipe and vent pipe pass through roof or
sidewall.
CARBON MONOXIDE POISONING HAZARD
Failure to follow this warning could result in personal
injury or death.
DO NOT use cement to join polypropylene venting
systems. Follow the polypropylene venting system
manufacturer's instructions for installing polypropylene
venting systems.
Optional Installation of the Vent Pipe
NOTE: DO NOT USE THIS TECHNIQUE FOR
POLYPROPYLENE VENTING SYSTEMS.
This option provides a disconnect point for the vent pipe. The
vent pipe must be cemented to the plastic vent pipe adapter to
maintain a sealed vestibule. See Figure 44 and Figure 45
1. Insert a length of vent pipe through the casing into the
outlet of the vent elbow.
2. Slide the plastic vent pipe adapter over the length of the
vent pipe down to the furnace casing. Mark the pipe
where it is flush with the outlet of the adapter.
3. Remove the pipe from the furnace and the adapter and
cut off any excess pipe.
4. Clean and prime the end of the pipe that is flush with the
vent adapter with a primer that is appropriate for the type
of pipe being used.
5. Re-insert the pipe through the casing into the vent
elbow.
6. Tighten the clamp around the outlet of the vent elbow.
Torque the clamp to 15 Ib-in.
7. Apply cement to the end of the pipe and to the inside of
the plastic vent adapter.
8. Slide the adapter over the vent pipe and align the screw
holes in the adapter with the dimples in the furnace
casing,
9. Pilot drill 1/8-in. screw holes for the adapter in the casing
and secure the adapter to the furnace with sheet metal
screws.
10. Loosen the clamps on the rubber vent coupling.
11. Slide the end of the coupling with notches in it over the
standoffs in the vent pipe adapter.
12. Tighten the clamp of the coupling over the vent pipe
adapter. Torque the lower clamp around the vent pipe
adapter to 15 Ib-in.
13. Pilot drill a 1/8-in. hole in the combustion air pipe
adapter.
14. Complete the vent and combustion air pipe as shown in
"Install the Vent and Combustion Air Pipe"
FOR POLYPROPYLENE VENTING SYSTEMS
When using polypropylene venting systems, all venting
materials used, including the vent terminations, must
be from the same manufacturer.
CARBON MONOXIDE POISONING HAZARD
Failure to follow this warning could result in personal
injury or death.
DO NOT use cement to join polypropylene venting
systems. Follow the polypropylene venting system
manufacturer's instructions for installing polypropylene
venting systems.
440 01 4001 04 Specifications subject to change without notice. 49
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