Rinnai REU-VA3237FFU User 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.
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.
R50LSi ............... REU-VA2019FFUD
R75LSi ............... REU-VA2528FFUD(A)
R94LSi ............... REU-VA2535FFUD
R98LSi ............... REU-VA3237FFU
R98LSi-ASME.... REU-VA3237FFU-ASME
Direct Vent Tankless Water Heater
ANS Z21.10.3
•
CSA 4.3
FOR INDOOR APPLICATIONS ONLY
—
—
•
•
•
•
—
Table of Contents...................... 2
Consumer Safety Information ... 4
Operating Instructions ............... 5
Maintenance.............................. 12
Error Codes............................... 13
Installation Instructions.............. 17
Consumer Support .................... 42

Rinnai REU-VA3237FFU Specifications

General

Type	Tankless
Ignition Type	Electronic Ignition
Category	Residential
Condensing	Yes
Gas Type	Natural Gas
Maximum BTU Input	199, 000 BTU/h
Minimum BTU Input	15, 000 BTU/h
GPM at 45°F Rise	7.5 GPM
Venting	Direct Vent
Warranty	12-year heat exchanger, 5-year parts, 1-year labor

Summary

Consumer Safety Information

What to Do If You Smell Gas

Emergency steps to take if a gas leak is detected around the appliance.

Specifications

Safety Definitions

Safety Behavior and Practices

Safety Features

Description of Operation

Features Available on Remote Controllers

Details the functionalities of different Rinnai remote control models.

Operating Instructions

Remote Controllers - Models

Setting the Temperature

Temperature Options Without a Remote Controller

How to set temperature using dip switches when no remote is used.

Temperature Ranges

Setting the Sound Volume (Voice Prompt)

Setting the Clock

Using the Water Smart / Bath Fill Function

Setting the Water Volume

Procedure for setting the desired water volume for bath fill.

Using the Water Smart / Bath Fill Function

Setting Controller to Mute

How to enable or disable controller beep sounds.

Maintenance

Cleaning

Steps for cleaning the appliance's internal and external components.

Vent System

Guidelines for inspecting the vent system for blockages or damage.

Visual Inspection of Flame

How to visually check the burner flame for proper operation.

Error Codes

Error Code Table

A reference table listing error codes, faults, and remedies.

Trouble Shooting for Common Issues

Accessing Operating Information

Water Quality

Flushing the Heat Exchange (Error Code: LC or 00)

Installation Instructions

General Instructions

Key requirements and recommendations for proper appliance installation.

Clearances from Appliance

Attachment of the Water Heater

Electrical Connection

Gas Piping

General Instructions

Key requirements for gas piping installation and safety.

Gas Piping

Pipe Sizing Procedure - Example

An example illustrating how to determine correct gas pipe sizing.

Water Piping

Pressure Relief Valve

Requirements and installation details for the pressure relief valve.

Freeze Protection

Information on the appliance's freeze protection features and recommendations.

Freeze Protection Piping

Recommended Piping for Basic Installation

Recommended Piping for Circulation Systems

Optional Piping for Circulation Systems

Venting Instructions

Intake / Exhaust Guidelines

Requirements for vent system components and installation.

Condensate

Information on managing condensate formation in high-efficiency appliances.

Maximum Vent Length

Vent Products

Flue Terminal Clearances (ANS Z21.10.3 ull CSA 4.3)

Additional Clearances - Vent Terminal

Flue Installation - Concentric Venting (R50LSi, R75LSi, R94LSi)

Flue Installation (R98LSi, R98LSi-ASME)

Air Intake Assembly

Steps for assembling the air intake pipe for R98LSi models.

Horizontal Terminations

Guidelines for horizontal air intake and exhaust terminations.

Flue Installation (R98LSi, R98LSi-ASME)

Horizontal with Concentric Termination

Diagrams for horizontal installation with concentric termination.

Vertical Terminations

Diagrams for vertical installation using concentric venting.

High Altitude Installations

Connecting Multiple Water Heaters

Remote Controller Installation

Location

Recommended locations for installing remote controllers.

Configurations

Possible combinations of multiple remote controllers.

Cable Lengths and Size

Specifications for remote controller cable length and gauge.

Remote Controller Installation

Operating Instructions

Technical Data

Pressure Drop Curve

Graph illustrating pressure loss versus water flow rate.

Outlet Flow Data

Graph showing water flow rate versus temperature rise.

Space Heating

Dimensions

Ladder Diagram

Consumer Support

Warranty Information

Details on product warranty coverage and required installer information.

Limited Warranty

Specific terms and conditions of the Rinnai water heater limited warranty.

Limited Warranty Continued

Rinnai's Other Fine Products