Biasi Riva Advance Combi Installation & Operation Instructions page 24

9. Venting Cont.
H PVC concentric vent kit - Part# RI 3PPS-HK
This kit allows horizontal termination of the flue pipe using PVC/CPVC pipe. The kit includes
boiler connection and termination adapted for CPVC/PVC. 3" PVC/CPVC pipe may be added
up to the total overall maximum permissible length of 132' intake and exhaust combined. Optional
45° and 90° elbows can be used to offset the flue route. Each additional elbow reduces the
overall acceptable length of the flue system as follows:
Max Length (intake + exhaust)
Min Length (intake + exhaust)
Canada: All PVC/CPVC pipe, fittings, and cement must be approved to ULC S636. Do
not mix pipe and joining compounds from different manufacturers as this can
result in an unsafe condition and void the certification.
Installation:
• Drill 5.5" hole through the outside wall making sure there is 1 foot clearance above normal
snow level.
• Insert the termination through the flexible exterior gasket and the building wall.
• Fix the exterior gasket to the wall using 4 contractor supplied fasteners.
• Slide the interior wall gasket over the termination and fix it to the wall using 4 user supplied
fasteners.
• Assemble the gaskets into the twin pipe adapter.
• Install the twin pipe adapter onto the termination.
• Install the PVC adapters supplied onto the twin pipe adapter according the manufacturers
instructions.
• Install piping pitched back toward the boiler making sure not to exceed the maximum
allowable length.
• Intake air piping can be constructed of PVC pipe. Exhaust piping must be CPVC or
Polypropylene for the first 8 feet.
• Intake and exhaust piping should be assembled and secured according to the pipe
manufacturers instructions.
• Install the vent adapter onto the top of the boiler using the gasket and screws provided.
• Install the pipe onto the boiler by simply pushing it into the adapters. Do not cement the pipe
into the adapters, this is a gasket connection.
RIVA ADVANCE COMBI MANUAL
Figure 9.7 (Equivalent length - 5')
Venting Specifications
132 f
3 ft.
2.9 ft. equivalent
45° elbow
5.4 ft. equivalent
90° elbow
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