Rinnai RU98i - Venting Guidelines

Rinnai CVent 16
Venng Guidelines
DO NOT
 Do not install in separate distribuon systems. All
water heaters common vented must be in the
same hot and cold plumbing manifolds and must
not exceed 8 units.
 Do not use PVC, CPVC, ABS or galvanized material
for the exhaust vent. CVent must ulize PPTL or
PPS on the exhaust side of the system.
 Do not combine vent components from dierent
manufacturers.
 Vent diameter must not be reduced.
 Do not connect the venng system with an
exisng vent or chimney.
 Do not common vent with the vent pipe of any
other type of water heater or appliance.
 Do not install the water heater in an area of
negave pressure.
 Do not install the water heater, venng, and vent
terminaon(s) in any areas where the air may
contain corrosive compounds.
MUST DO
• The water heater dip switch seng must always
be set to long vent (SW1 in DIPSW1 should be set
to OFF posion).
 You must use vent components that are cered
and listed with the water heater model.
 The vent system must vent directly to the outside
of the building and use outside air or room air
(room air is for C199i commercial water heater
applicaons only) for combuson.
 Avoid dips or sags in horizontal vent runs by
installing supports per the vent manufacturer’s
instrucons.
 Support horizontal vent runs a minimum of every
four feet and all vercal vent runs a minimum of
every six feet.
 Venng should be as direct as possible with a
minimum number of pipe ngs.
 Vent connecons must be rmly pressed together
so that the gaskets form an air ght seal.
 Install an appliance adapter which contains a
check valve onto each water heater. Use only the
check valve specied in this manual. Do not
aempt to build your own system.
 The air intake appliance adapter connected to the
water heater must be secured with one self-
tapping screw.
 Check and clean the header check valve every 12
months according to the maintenance instrucons
in this manual.
 Set the temperature seng on all water heaters
being common vented to the same temperature.
INFORMATION
 Unless recovering a tank, Rinnai recommends
installing an MSB controller when common
venng and where water heaters are in a manifold
system.
 For assembly details, refer to the Ubbink
Installaon and Assembly Instrucons located in
the appendix of this manual.
 Rinnai recommends replacing the check valve
when replacing the water heater.
The Ubbink Polypropylene Translucent (PPTL for U.S. Applicaons) and/or Polypropylene S
(PPS for Canadian Applicaons)
CVent can be used on both the combuson air and exhaust. Field supplied PVC material
can only be used on the combuson air side and MUST NOT be used for the exhaust. For
Canadian installaon, all materials must be ULC-S636 approved.
WARNING