Burnham K2WTC - Assembly of Selkirk Polyflue Vent Systems

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VII. Venting F. Assy of DuraVent PolyPro & G. Selkirk Polyue Vent Systems (continued)
8. InstallationsusingPolyPro-ex(VentOptions9&15):
WARNING
Asphyxiation Hazard. When using PolyPro ex, observe the following precautions:
• PolyPro ex may be damaged by handling at low temperatures. Do not bend, uncoil, or attempt to install
if it has been stored at a temperature below 42°F without allowing it to warm to a higher temperature
rst.
• Do not bend PolyPro ex more than 45°.
• Instructions below reference the DuraVent PolyPro Flex instruction manual. Not all vent
congurations shown in the DuraVent manual are approved for use with this boiler.
 RefertoDuraVentPolyProexInstructionsforassemblyofallexcomponentsincludingthechimneycapandtheadaptor
to rigid PolyPro at the base of the masonry or B vent chimney. In addition, observe the following requirements:
a. RefertotheappropriateVentoptioninTables7.13bor7.21foralistoftheprincipleexcomponentsrequired.Rigid
vent pipe by the same manufacturer will also be required for the run from the boiler to the base of chimney.
b. Masonry chimneys cannot be used for an air chase
c. B vent chimneys can only be used for an air chase (Vent option 9) if the B vent has the minimum size shown in
Table 7.13b and is fully accessible for sealing of all joints and seams.
d. When Vent Option 9 is used, install a Tee on the base of the B-vent that is the same size as the B- Vent chimney.
Install the PolyPro Lower B–Vent adaptor in the base of this Tee as described in the DuraVent PolyPro Flex instructions.
Connection of the PVC air intake pipe to the side outlet of the tee is made using a cap and a PVC socket x male thread
adaptor. Cut a clearance hole in the cap for the male threads. Secure the adaptor to the cap using a 3” electrical conduit
lock nut. Seal all joints with RTV.
G. Assembly of Selkirk Polyue Vent Systems
1. ThisboilerhasbeenapprovedforusewiththeSelkirkPolyuesinglewallPolypropyleneventsystemtobeprovidedbythe
installer.
2. Assemble the vent system, starting at the boiler:
a. Theventadaptorhasthreedifferentinsidediameters.Themiddleinsidediameteraccepts3”nominalPolyue 
(Figure 7.27). A locking band clamp in the adaptor prevents the vent pipe from coming out of the adaptor once it is
installedandtightened.Lubricatethegasketsintheventadaptorwithmildsoapywaterandinserttherstpieceof3”
Polyueintotheadaptoruntilitbottomsout.Tightenlockingbandclamptosecureventpipe.
b. Assemblethenextpieceof3”Polyue.
c. For each joint, verify that the gasket is evenly seated in the bell (female) end of the pipe. Lubricate this gasket with mild
soapy water. Slide a Pipe Locking Band over the male end of the pipe to be joined as shown in Figure 7.41. Push the
male end of the next section of pipe into the bell until it bottoms out, then back out 1/8—1/4” to provide room for
thermal expansion. Slide pipe locking band over the female end of the connections and tighten both hose clamps.
d. Assemble the rest of the vent system per the manufacturer’s installation instructions, being sure to pitch horizontal
sections back towards the boiler 5/8” per ft.