Rinnai REU-VC2528W-US User Manual

Direct Vent Tankless Water Heater
Installaon and Operaon Manual
— Do not store or use gasoline or other ammable 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 instrucons.
 If you cannot reach your gas supplier, call the re department.
— Installaon and service must be performed by a licensed professional.
This enre manual must be le for the consumer. The consumer must read and
refer to this manual for proper operaon and to maintain the water heater.
If the informaon in these instrucons is not followed exactly, a re or explosion
may result causing property damage, personal injury or death.
WARNING
READ ALL OF THE INSTRUCTIONS THOROUGHLY BEFORE INSTALLING OR OPERATING THIS WATER HEATER.
This manual provides informaon on the installaon, operaon, and maintenance of the water heater. For proper
operaon and safety, it is important to follow the instrucons and adhere to the safety precauons.
A licensed professional must install the water heater according to the exact instrucons on pages 4-27.
The consumer must read the enre manual to properly operate the water heater and to have regular maintenance
performed.
ANS Z21.10.3 ● CSA 4.3
FOR INDOOR APPLICATIONS ONLY
V94i ...................... REU-VC2837FFU-US
V94Xi .................... REU-VC2737FFU-US
V75i ...................... REU-VC2528FFU-US
V65i ...................... REU-VC2025FFU-US
FOR OUTDOOR APPLICATIONS ONLY
V94e ..................... REU-VC2837W-US
V75e ..................... REU-VC2528W-US
V65e ..................... REU-VC2025W-US
SANITATION
Low Lead Content
NSF/ANSI 372
C US

Rinnai REU-VC2528W-US Specifications

General

Brand	Rinnai
Model	REU-VC2528W-US
Category	Water Heater
Language	English

Summary

Safety Behaviors and Practices

Installation Instructions for Licensed Professionals

Installer Qualifications

Skills required for licensed professionals, including gas sizing and electrical connections.

Prepare for Installation

Lists parts, tools, and materials needed for a successful installation.

Determine Installation Location

Factors influencing installation site choice, including water quality and environmental considerations.

Unit Clearances

Required clearances for indoor and outdoor models to combustibles and non-combustibles.

Venting and Condensate Management

Guidelines for indoor venting systems and condensate drainage to prevent damage.

Plumbing and Water Supply Installation

Requirements for pressure relief valves, isolation valves, and water connections.

Gas Supply Installation

Guidelines for connecting gas supply, including sizing, pressure, and safety.

Electrical Connection and Settings

Safety, grounding, and DIP switch settings for electricity and altitude adjustments.

Temperature Controller Installation

Instructions for installing and configuring temperature controllers for optimal performance.

Final Installation Checklist

Comprehensive checklist for ensuring a complete and correct installation.

Specifications

Technical Data

Dimensions

Diagrams and measurements for V94i/e and V94e series units.

Performance Curves

Graphs showing pressure drop and water flow characteristics against GPM.

Ladder Diagram

Electrical schematic showing component connections and logic for system operation.

Operation Instructions

Important Facts and Gas Leak Procedures

Key safety facts and emergency procedures for gas leaks.

Safe Operation and Startup Guide

Step-by-step guide for safe operation and appliance startup.

Temperature Controller Operation

Guide for operating the temperature controller and setting desired temperature.

Diagnostic Codes and Troubleshooting

How to display, interpret, and resolve diagnostic codes for troubleshooting.

Required Maintenance

Routine Cleaning Procedures

Steps for cleaning internal components, filter, and temperature controller.

Water Quality and Scale Management

Addressing scale issues, water quality impact, and prevention.

Freeze Protection and Winterization

Measures to protect the unit from freezing and prepare for winter.

Flame Inspection

How to visually check for proper burner flame pattern.

Heat Exchanger Flushing

Draining and Freezing Procedures

Manual Draining

Steps to manually drain the water heater for storage or freezing prevention.

Freezing Prevention Methods

Methods to prevent freezing with low water flow or if unit has frozen.

State Regulations

Replacement Parts

Consumer Warranty

Warranty Coverage and Duration

Details what is covered, excluded, and for how long the warranty lasts.

Obtaining Service and Limitations

Procedures for warranty service and warranty limitations.