Rinnai REU-V2520FFU User Manual

WARNING: If the information in these instructions is not followed exactly, a re
or explosion may result causing property damage, personal injury or death.
Operation / Installation Manual
– 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.
(Residential and Commercial indoor unit)
To Suit Models:
REU-V2520FFU........ R53
REU-V2520FFUC..... C53
REU-V2532FFU........ R85
REU-V2532FFUC...... C85
REU-V2520FFUD......
R53PLUS
REU-V2520FFUCD... C53PLUS
REU-V2532FFUD...... R85PLUS
REU-V2532FFUCD... C85PLUS
ANS Z21.10.3
=
CSA 4.3

Rinnai REU-V2520FFU Specifications

General

Type	Tankless
Fuel Type	Natural Gas
Maximum BTU Input	199, 000 BTU
Minimum BTU Input	15, 000 BTU
Energy Factor	0.82
Ignition System	Electronic
Electrical Requirements	120 VAC
Warranty	12 years heat exchanger, 5 years parts, 1 year labor

Summary

Rinnai Water Heater Safety Procedures

What To Do If You Smell Gas

Procedure to follow if gas leak is detected, emphasizing immediate actions and contacting authorities.

SPECIFICATIONS

LIMITED WARRANTY

WHAT IS COVERED?

OWNER'S INSTALLATION INFORMATION

FEATURES OF YOUR NEW WATER HEATER

SAFETY ISSUES

BASIC OPERATION

REMOTE CONTROLLER OPERATION

ERROR MESSAGES

MAINTENANCE & SERVICE INFORMATION

MAINTENANCE SUGGESTIONS

TROUBLE SHOOTING AND COMMON QUESTIONS

FOR YOUR SAFETY READ BEFORE OPERATING

Crucial safety information that must be read before operating the appliance.

OPERATING INSTRUCTIONS

Installer's Instructions

Warnings-

Essential warnings for installers before proceeding with installation.

Locating the Vent Terminal

Guidelines for properly positioning the vent terminal for safe exhaust.

-Warnings- (Residential Unit)

Specific warnings and instructions for residential unit installation.

-Warnings- (Commercial Unit)

Specific warnings and instructions for commercial unit installation.

Locating the vent terminal

Detailed guidance on recommended vent/air intake terminal positions.

RECOMMENDED PIPING FOR BASIC INSTALLATION

Diagram showing basic piping recommendations for installation.

RECOMMENDED PIPING FOR CIRCULATION SYSTEMS

Diagram for recommended piping for circulation systems.

OPTIONAL PIPING FOR CIRCULATION SYSTEMS

RECOMMENDED SCALE FLUSH PROCEDURE

Step-by-step guide for flushing the water heater to remove scale.

Air Intake and Exhaust Vent Pipe Length

Freeze Protection

Measures and considerations for protecting the unit from freezing.

Gas Piping Sizing Chart

Tables to determine appropriate gas pipe sizes based on length and gas type.

Gas Piping Notes

Water Piping Notes

Pressure Relief Valve

Lighting the Unit

Remote Controllers- General

Remote Controllers - Installation

Remote Controllers Installation to Appliance

Testing

Procedures for testing gas and water pressure, and overall unit operation.

Schematic Diagram