Rinnai E75CN - Manual (Page 30)

Installation & Servicing Instructions Rinnai E-Series
30
6.7.4 Recommended vent/air intake terminal position
Terminals should be positioned as to avoid products of combustion entering
openings into buildings or other vents.
Maintain 12” of clearance above the highest anticipated snow level or grade
or, whichever is greater. Please refer to your local codes for the snow level in
your area.
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 (1219 mm) of horizontal run, beginning with
the support near the boiler to prevent movement in fittings and allow boiler
to be free from any strain or weight on boiler or fittings.
The terminal should be located where dispersal of combustion products is
not impeded and with due regard for the damage or discolouration that might
occur to building products in the vicinity (see fig 14 and 15).
NOTICE
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CAUTION
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12" (300 mm)
minimum
12" (300 mm)
minimum
12" (300 mm)
minimum
INTAKE
EXHAUST
12" (300 mm)
minimum
12" (300 mm)
minimum
Terminal positions PVC figure 15
Approval codes for installation of venting system table 7
Equivalent friction loss of PVC/CPVC table 8
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 US/CAN Flue system
Plastic Vent and/or air
pipes and fittings
PPS Ubbink
Rolux Condensing
Vent System
Approval Codes for Installation
Plastic Vent and/or air
pipes and fittings
Plastic Pipe cement and
primer
Saf-T Vent SC
Saf-T Vent EZ Seal Stainless steel vent
systems
AL29-4C Heat Fab
concentric
UL1738 twin pipe
Fittings or Piping Equivalent
feet m
45 degree elbow 3 0.91
90 degree elbow 6 1.83
plastic pipe per foot 1 0.30
concentric vent kit 3 0.91