Biasi Riva Plus Combi Installation & Operation Instructions page 24

9. Venting Cont.
F Standard Vertical-roof kit (Exhaust & intake outside)
This kit allows vertical termination of the fl ue pipe through the roof. The kit is 1.2 min length.
Extension pieces (Co--axial) are also available which allows the fl ue system to be extended to
a total overall maximum permissible length.
Optional 45° and 90° elbows can be used to offset the fl ue route.
Each additional elbow reduces the overall acceptable length of the fl ue system as follows:
45° reduce length by 1.6 ft.
90° reduce length by 3.2 ft.
Installation:
• Drill hole through the outside roof.
• Cut the pipe as necessary.
• Slide the intake and exhaust pipes through the hole.
• Slide one rubber wall trim piece on the pipe from inside and one from outside.
• Connect exhaust (inner) pipe to concentric elbow.
• Connect intake (outer) pipe to concentric elbow.
• Secure elbow to boiler using gasket and four screws provided.
• Secure end cap on the intake pipe outside the house.
24 RIVA PLUS COMBI MANUAL
Figure 9.8 (vertical pipe Ø 3.1 / Ø 4.9 in)