Installation manual
RIVA PLUS COMBI MANUAL 27
9. Venting Cont.
H PVC roof vent kit
Figure 9.7
This kit allows vertical 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:
• Choose the appropriate weather collar for the installation, Pitched or Flat.
• Drill a hole through the roof large enough to accommodate the 5.5” vent terminal.
• Fix the ue collar in place and insert the termination from outside the building.
• Fix the supplied wall clamp around the vent terminal but do not tighten it.
• Assemble the gaskets with the concentric pipe adapter. It may be necessary to use a small
amount of water.
• Install the PVC adapters supplied onto the twin pipe adapter according the manufacturers
instructions.
• Install piping to 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.