Installation manual
26 RIVA PLUS COMBI MANUAL
9. Venting Cont.
G PVC concentric vent kit
Figure 9.6
This kit allows horizontal termination of the ue 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 100’ intake and exhaust combined. Optional
45° and 90° elbows can be used to offset the ue route. Each additional elbow reduces the
overall acceptable length of the ue system as follows:
Venting Specications
Max Length (intake + exhaust) 100 ft. 45° elbow 1.6 ft. equivalent
Min Length (intake + exhaust) 3 ft. 90° elbow 3.2 ft. equivalent
Canada: All PVC/CPVC pipe, ttings, 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 certication.
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 exible 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 x 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 should be CPVC for the
rst 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.