Installation Guide

Installation & Servicing Instructions Rinnai Q-Series
37
See Boiler Applications manual for additional venting information.
The termination shall be at least 4 feet (1,220 mm) for the US and 6 feet (1,830
mm) for Canada distance from electric meters, gas meters, regulators and relief
equipment. (for room air application only)
Horizontal vent systems should always be installed sloping towards the boiler
(min. 21 mm/m, 1/4”/ feet), in order to avoid condensate retaining in the vent
system. With the condensate running back to the boiler the risk of ice forming
at the terminal is reduced.
The whole route of the vent system must be installed upwards, never downwards,
completely nor partly.
Place pipe supports every 4 feet (1,219 mm) of horizontal run, beginning with
support near the boiler to prevent movement in fi ttings and allow boiler to be
free from any strain or weight on boiler or fi ttings.
The terminal should be located where dispersal of combustion products is not
impeded and with due regard for the damage or discoloration that might occur
to building products or vegetation in the vicinity (see fi g 19 and 20).
In certain weather conditions condensation may also accumulate on the outside
of the air inlet pipe. Such conditions must be considered and where necessary
insulation of the inlet pipe may be required.
In cold and/or humid weather water vapor may condense on leaving the vent
terminal. The effect of such ‘water condensation’ must be considered.
The terminal must be located in a place not likely to cause a nuisance.
Use the Instructions of the Rinnai venting system for installation and service.
Cellular or Foam core PVC, CPVC and Radel is not permitted for use with the
boiler.
The application of any type of insulation is prohibited for use with any Plastic
venting system.
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Approval codes for installation of venting system table 7
Item Description Flue Material United States
PVC Schedule 40 ANSI/ASTM D1785
PVC - DWV ANSI/ASTM D2665
CPVC Schedule 40 ANSI/ASTM F441
PVC ANSI/ASTM D2564
CPVC ANSI/ASTM F493
Item Description Flue Material Manufacturer Approval code
US/CAN
Flue system
Stainless steel vent systems Stainless Steel Ubbink
Rolux Condensing
Vent System
Plastic Vent System PPS Ubbink ULC S636
Rolux Condensing
Vent System
Plastic Vent System PVC/CPVC IPEX ULC S636 System 636
Plastic Vent System PPS Centrotherm ULC S636 and UL 1738 Innoflue
Stainless steel vent systems Stainless Steel Simpson Dura-Vent
FastNSeal Flex
FastNSeal
UL1738 Flexible liner
UL1738 Concentric
twin pipe
Saf-T Vent SC
Saf-T Vent EZ Seal
Stainless steel vent systems Stainless Steel Heat Fab
UL1738 Concentric
twin pipe
Approval Codes for Installation
Canada
Plastic Vent and/or air pipes and
fittings
ULC S636
Plastic Pipe cement and primer
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