Installation manual
28 RIVA PLUS COMBI MANUAL
I PVC separate vent kit
Figure 9.8
This kit allows horizontal termination of the ue pipe using 3” PVC/CPVC pipe. The kit includes
PVC/CPVC boiler adapters and CPVC termination. PVC pipe may be added up to the total
overall maximum permissible length. 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 two 4” holes through the outside wall or the roof.
• Insert the pipes from the boiler through the wall making sure they slope towards the boiler.
• Intake air piping can be constructed of PVC pipe. Exhaust piping should be CPVC for the
rst 8 feet.
• Install the trim plate with the gasket facing the building using four eld supplied screws.
• Secure the pipes in place inside the building using installer supplied hangers. Make sure
there is no sagging or low spots for condensate to collect.
• Cut the intake and exhaust pipes so they extend at least 2 1/2” past the trim plate.
• Solvent cement a PVC elbow facing the ground onto the air intake. The Intake elbow
must be at least 12” above normal snow level.
• Solvent cement a PVC/CPVC elbow facing up onto the exhaust outlet.
• Solvent Cement the 6” length of PVC/CPVC pipe into the elbow.
• Solvent Cement a PVC/CPVC elbow onto the pipe making sure the elbow faces away
from the building.
• Install the rodent screens into the intake and exhaust. This is a friction t.
• 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.
9. Venting Cont.