Rinnai RC98I User Manual
Operation and installation manual, Tankless water heater

— Do not store or use gasoline or other flammable vapors and
liquids in the vicinity of this or any other appliance.
 
— WHAT TO DO IF YOU SMELL GAS 
 
•
Do not try to light any appliance.
•
Do not touch any electrical switch; do not use any phone in 
your building. 
•
Immediately call your gas supplier from a neighbor’s phone. 
Follow the gas supplier’s instructions. 
•
If you cannot reach your gas supplier, call the fire 
department. 
 
— Installation and service must be performed by a qualified 
installer, service agency or the gas supplier.
WARNING: If the information in these instructions is not 
followed exactly, a fire or explosion may result causing 
property damage, personal injury or death. 
Operation and Installation Manual
INSTALLER: Leave this manual with the appliance. 
CONSUMER: Retain this manual for future reference. 
Table of Contents .................... 2 
Consumer Safety Information .. 4 
Operating Instructions .............. 5 
Maintenance ............................ 11 
Error Codes ............................. 12 
Installation Instructions ............ 16 
Consumer Support ................... 41 
French Version ........................ 43 
Tankless Water Heater
Register your product at www.rinnairegistration.com or 
call 1-866-RINNAI1 (746-6241) 
ANS Z21.10.3
●
CSA 4.3
FOR INDOOR APPLICATIONS ONLY
RC80i
.................. REU-KA2530FFUD-US
RC98i
.................. REU-KA3237FFUD-US
FOR OUTDOOR APPLICATIONS ONLY
RC80e
................. REU-KA2530WD-US
RC98e
................. REU-KA3237WD-US
