Rinnai CU Series User Manual

2 Polypropylene (PP) Common Venng Installaon Instrucons
This manual provides installaon instrucons for
Ubbink Polypropylene (PP) common venng and is a
supplement to the Installaon and Operaons Manual
supplied with the Rinnai Tankless Water Heater. For
PVC/CPVC common venng, refer to installaon
instrucons for PVC/CPVC common venng.
Common venng must sasfy all the requirements of
the Installaon and Operaons Manual, as well as the
requirements in this manual.
For detailed informaon on the Rinnai Tankless Water
Heater, including installaon instrucons, refer to the
Tankless Water Heater Installaon and Operaon
Manual or view an online version at rinnai.us.
Illustraons of tankless water heaters in this document
represent one of the applicable Rinnai tankless water
heaters. Your water heater may look dierent.
Welcome .................................................................... 2
Safety ......................................................................... 3
About the Common Venng System ............................ 4
Venng Guidelines ...................................................... 4
High Altude Installaons ........................................... 5
Common Vent Maximum Equivalent Vent Lengths..... 5
3 in. Common Venng ................................................. 7
3 in. Direct Vent and Room Air .................................... 7
3 in. Inline and Corner Kits .......................................... 8
4 in. Common Venng ................................................. 9
4 in. Direct Vent and Room Air .................................... 9
4 in. Inline Add-On and Starter Kits ........................... 10
4 in. Back-to-Back Add-On and Starter Kits ............... 11
6 in. Common Venng ............................................... 12
6 in. Direct Vent and Room Air .................................. 12
6 in. Inline Add-On and Starter Kits ........................... 13
6 in. Back-to-Back Add-On and Starter Kits ............... 14
Terminaon Kits ....................................................... 15
Common Vent Components ...................................... 16
Sample Horizontal Terminaon Assembly .................. 17
Sample Vercal Terminaon Assembly-Room Air ...... 18
Maintenance Clearances ........................................... 19
Combuson Air Requirements ................................... 21
Exhaust Vent Terminaon Clearances ........................ 24
Addional Clearances ............................................... 26
Installaon Instrucons ............................................ 27
Final Checklist ........................................................... 30
Appendix A — Ubbink Condensing System ................. 31
• This manual is intended for the trained and
qualied professional and is designed for licensed
installers who should have skills such as:
− Gas sizing
− Connecng gas lines, water lines, valves, and
electricity
− Knowledge of applicable naonal, state, and
local codes
− Installing venng through a wall or roof
− Training in installaon of tankless water heaters.
Training on Rinnai Tankless Water Heaters is
accessible at rinnaipro.myabsorb.com.
• A trained and qualied professional must test the
Common Venng System for leaks before use.
• The installaon must conform to the Rinnai
Tankless Water Heater Installaon and Operaon
Manual that is shipped with the unit, local codes, or
in the absence of local codes, with the Naonal
Fuel Gas Code, ANSI Z223.1/NFPA 54.
• Read all instrucons contained in this manual
before installing the Common Venng System.
• Proper installaon is the responsibility of the
installer.
• When installaon is complete, give all manuals
related to the common venng installaon
(including this manual and the Rinnai Tankless
Water Heater Installaon and Operaon Manual)
directly to the consumer. The manuals should be
stored in a readily accessible locaon for future
reference.
Contact your local dealer/distributor, or call Rinnai
Customer Care at 1-800-621-9419 Monday to Friday
between 8 AM to 8 PM EST.
• Keep this manual for future reference.
• Be sure your Common Venng System is installed
by a trained and qualied professional.

Rinnai CU Series Specifications

General

Brand	Rinnai
Model	CU Series
Category	Boiler
Language	English