Rinnai REU-KB3237FFUD-US User Manual

2 KB Series Manual

This is the safety alert symbol. This symbol alerts you to potenal hazards that can kill or hurt you
and others.
Indicates an imminently hazardous situaon which, if not avoided, will result in death or
serious injury.
Indicates a potenally hazardous situaon which, if not avoided, could result in death or
serious injury.
Indicates a potenally hazardous situaon which, if not avoided, could result in minor or
moderate injury. It may also be used to alert against unsafe pracces.
DANGER
CAUTION
WARNING
Table of Contents ..................................................... 2
Safety Behaviors and Pracces for the
Consumer and Installer ............................................ 3

 ............................. 
Prepare for Installaon ...................................... 5
Determine Installaon Locaon ........................ 6
Checklist to Determine Installaon Locaon ... 12
Mount to Wall .................................................. 12
Remove the Front Panel .................................. 12
Installaon of Venng (indoor models only) ... 13
Twin Pipe PVC/CPVC Vent Installaon ........ 17-36
Condensate (indoor models only).................... 37
Checklist for Venng and Condensate
(indoor models only) ........................................ 37
Installaon of Plumbing ................................... 38
Checklist for Plumbing ..................................... 41
Installaon of Gas Supply ................................ 41
Connect Electricity ........................................... 43
Adjust for High Altude ................................... 43
Adjust for Vent Length (indoor models only) .. 43
Checklist for Gas and Electricity ....................... 43
Installaon of Temperature Controller ............ 44
Final Checklist ................................................... 46
Technical Data ........................................................ 47
Specicaons ................................................... 47
Dimensions ....................................................... 48
Pressure Drop and Water Flow Curves ............ 49
Ladder Diagram ................................................ 50
Recirculaon Mode .......................................... 51
 ....................................... 
Consumer Operaon Guidelines for the
Safe Operaon of your Water Heater .................... 54
How to Use the Temperature Controller ............... 55
How to Set the Temperature .................................. 56
Diagnosc Codes .................................................... 58
Required Maintenance ........................................... 61
Flushing the Heat Exchanger............................ 63
Manual Draining of the Water Heater ............. 64
State Regulaons .................................................... 65
Replacement Parts ................................................. 66
Consumer Warranty ............................................... 68
French Version ........................................................ 70


NOTICE: Rinnai somemes shares customer contact informaon with businesses that we believe provide
products or services that may be useful to you. By providing this informaon, you agree that we can
share your contact informaon for this purpose. If you prefer not to have your informaon shared with
these businesses, please contact customer service and ask not to have your informaon shared. We
will however, connue to contact you with informaon relevant to the product(s) you registered and/
or you account with us.
If you have any quesons or feel that the manual is incomplete contact Rinnai at 1-800-621-9419.

Rinnai REU-KB3237FFUD-US Specifications

General

Brand	Rinnai
Model	REU-KB3237FFUD-US
Category	Water Heater
Language	English