Twin Pipe Pvc/Cpvc Vent Installa On - Rinnai ru80i Installation And Operation Manual

Twin Pipe PVC/CPVC Vent Installa on

Rinnai has cer fied the Ubbink 3"/5" to 3"/3" Concentric to Twin Pipe Adaptor and other ven ng equipment to be used
with the op onal PVC/CPVC twin pipe ven ng system for use with the following condensing water heater models only:
REU-KB3237FFUD-US (RU98i) and REU-KB2530FFUD-US (RU80i).
The newly cer fied vent system is comprised of a Concentric to Twin Pipe Adaptor (adaptable to 3 and 4 inch sizes),
PVC/CPVC pipes, fi ngs and either the IPEX System Concentric Vent Kit Assembly (System 636), snorkel termina on or tee
termina on.
Installa ons must comply with local requirements and with the Na onal Fuel Gas Code, ANSI Z223.1/NFPA 54 for U.S.
installa ons or CSA B149.1 for Canadian installa ons. DO NOT use cellular core PVC, CPVC, or Radel based pipe materials
for the exhaust vent. Vents MUST be of solid core pipes ONLY.
Use only the materials listed in this sec on for vent, air intake pipe and fi ngs (See vent and air piping materials table).
Failure to comply with this warning could result in severe personal injury, death or substan al property damage.
PVC ven ng cannot be used if the condensing water heater, under the following condi ons:
The water heater is installed in a recircula on system and the thermostat se ng is greater than 150 F (65.5 C).
The water heater is used in a combina on domes c water and space hea ng applica on which requires a thermostat
se ng greater than 150 F (65.5 C).
The Ubbink Concentric to Twin Pipe Adaptor (above) is ULC S636 approved and is listed by the applicable agencies having
jurisdic on and is cer fied for use throughout the U.S. and Canada. The Concentric to Twin Pipe Adaptor is supplied
exclusively through Rinnai and/or its distributors.
Ubbink® Concentric to Twin Pipe Adaptor
Exhaust
WARNING
WARNING
KB Series Manual
Combus on
NOTICE
NOTE
Air Inlet
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