Table Of Contents; Installer Qualifications; Description; Model Applicability - Rinnai RU98i Installation Manual

Table of Contents

Installer Qualifications .......................................... 2
Description ............................................................ 2
Model Applicability ............................................... 2
Safety Symbols ...................................................... 3
Warranty and Liability Exclusions ......................... 3
Specifications ........................................................ 3
High Altitude Installation ...................................... 4
Parts/Kits ............................................................... 5
Sample Roof Installation ..................................... 13
Sample Horizontal Termination Installation........14
Sample Vertical Termination Installation.............15
Venting Guidelines .............................................. 16

Installer Qualifications

WARNING
A licensed professional must install the common venting.
The installer should have skills such as

connecting gas lines, water lines, valves, and electricity

knowledge of applicable national, state, and local codes
If you lack these skills, contact a licensed professional.

Description

The CVent Common Venting system provides longer vent lengths and fewer wall or roof penetrations than
conventional single-unit venting. For the exhaust flue, CVent utilizes a CSA certified and tested venting (PPTL)
and for Canada ULC-S636-certified and tested venting (PPS) material from Ubbink, the same supplier for
Rinnai's innovative line of concentric venting. The various sections are self locking and sealing and can be
pushed together without use of cement or glue.
CVent is for use in U.S. and Canada only. PPTL components are certified for U.S. installations whereas PPS
components are certified for Canadian installations.
Installation is certified for up to 10,200 feet. Refer to the Installation and Operation Manual for the tankless
water heater (RU98i, RUC98i or C199i) for appropriate dip switch selection. Refer to High Altitude
Installation section in this manual for appropriate de-rate values.

Model Applicability

The common vent system is CSA certified (ANSI Z21.10.3, Gas Water Heaters Standards) for use with the
following Rinnai tankless condensing water heaters only: RU98i (REU-KB3237FFUD-US),
RUC98i (REU-KBD3237FFUD-US), and C199i (REU-KBD3237FFUDC-US)
Rinnai CVent
Improper installation of the vent system and components, or failure to follow all installation
instructions, can result in serious injury.
Maximum Equivalent Vent Length ...................... 17
CVent Termination Clearances ............................ 17
Combustion Air Requirements ........................... 19
Exhaust Vent Termination Clearances ................ 23
CVent Maintenance Clearances .......................... 26
Water Heater Clearances .................................... 26
CVent Installation Instructions ............................ 27
Common Header Check valve Maintenance ....... 32
Final Checklist ...................................................... 33
Appendix
Ubbink CVent Assembly Instructions .................. 34
French Version .................................................... 44
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