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Rinnai RUR98i User Manual

Rinnai RUR98i
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Direct Vent Tankless Water Heater
with Integrated Pump
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.
If you cannot reach your gas supplier, call the fire department.
may result causing property damage, personal injury, or death.
WARNING
READ ALL OF THE INSTRUCTIONS THOROUGHLY BEFORE INSTALLING OR OPERATING THIS WATER HEATER.
safety
performed.
FOR INDOOR APPLICATIONS ONLY
RUR98i .................. REU-KBP3237FFUD-US
FOR OUTDOOR APPLICATIONS ONLY
RUR98e ................. REU-KBP3237WD-US
ANSI Z21.10.3 ● CSA 4.3
U306-1465X01(00)
060 00012 37150 5

Table of Contents

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Rinnai RUR98i Specifications

General IconGeneral
TypeTankless
CategoryResidential
Fuel TypeNatural Gas/Propane
Maximum Flow Rate9.8 GPM
CondensingYes
Gas Connection3/4" NPT
Water Connection3/4" NPT
Ignition TypeElectronic
Warranty12 years heat exchanger, 5 years parts, 1 year labor
Maximum BTU Input199, 000 BTU/h
Minimum BTU Input15, 000 BTU/h
Electrical Requirements120V, 60Hz
Temperature Range98°F - 140°F
GPM at 45°F Rise8.4 GPM

Summary

Important Safety Information

Safety Definitions

Defines safety alert symbols like Danger, Warning, and Caution.

Safety Behaviors and Practices for the Consumer and Installer

WARNING

Provides critical safety precautions for operation and maintenance.

CAUTION

Highlights burn hazard warnings and precautions.

WARNING (California Proposition 65)

Discloses potential chemical exposure related to California regulations.

Installation Instructions

Installer Qualifications

Outlines the necessary skills and training for qualified installers.

General Instructions

Covers essential installation rules and requirements for all installations.

Prepare for installation

Parts included

Lists components provided with the water heater unit.

Tools needed

Lists all necessary tools required for the installation process.

Materials needed

Lists all required materials for the installation process.

Determine Installation Location

Water Quality

Advises on checking water quality to prevent heat exchanger damage.

Environment

Discusses site conditions and potential impacts of corrosive air.

Direct Vent Terminal Clearances (Indoor Units)

Other Than Direct Vent Terminal Clearances (Outdoor Units)

Unit clearances

Freeze Protection

Explains measures to prevent freezing damage to the unit and water lines.

Maximum vent length

Checklist to Determine Installation Location

Mount to Wall

Provides step-by-step instructions for physically mounting the unit.

Remove the Front Panel

Details how to remove the front panel for access to internal components.

Installation of Venting (indoor models only)

Approved Vent Manufacturers

Lists manufacturers and products certified for venting.

Venting Guidelines

DO NOT

Lists prohibited practices for vent system installation.

MUST DO

Lists required practices for vent system installation.

Determining Vent Configuration

Concentric Vent Configuration

Provides details for installing a concentric vent system setup.

Determining Vent Configuration (continued)

Twin Pipe PVC/CPVC Configuration

Provides details for installing a twin pipe PVC/CPVC vent system.

Flue Installation with Concentric Venting (indoor models only)

Horizontal Termination

Specific guidance for horizontal flue installation with concentric venting.

Vertical Termination

Specific guidance for vertical flue installation with concentric venting.

Flue Installation with Centrotherm Venting (indoor models only)

Twin Pipe PVC/CPVC Vent Installation

Twin Pipe PVC/CPVC Vent Installation Requirments

IMPORTANT CONSIDERATIONS FOR LOCATION

Key factors and guidelines for choosing vent termination locations.

Determining Total System Equivalent Length

OPTION 1

Vent length calculation method using a worksheet.

OPTION 2

Vent length calculation method using tables.

OPTION 2: Maximum Equivalent Vent Length Tables

Installation of PVC/CPVC Vent and Intake Air Piping

Required Parts For 3” PVC/CPVC Assembly Configuration

Lists specific parts required for 3-inch PVC/CPVC vent assembly.

Required Parts For 4” PVC/CPVC Assembly Configuration

Lists specific parts required for 4-inch PVC/CPVC vent assembly.

Certified PVC/CPVC Vent Termination Options

Vent Termination Configurations

Overview of the different types of approved vent termination configurations.

Termination Installation

General steps and considerations for installing vent terminations.

Approved PVC/CPVC Vent Configurations

VENTING INSTALLATION SEQUENCE

Provides a step-by-step process for installing the vent system.

Certified PVC/CPVC Vent Termination Options (continued)

Twin Pipe (PVC/CPVC) Terminations

General information regarding twin pipe PVC/CPVC vent terminations.

PVC/CPVC Sidewall (Tee and Snorkel) Terminations

Specific guidance for sidewall vent terminations using tee or snorkel.

Certified PVC/CPVC Vent Termination Options (continued)

PVC/CPVC Roof (Tee and upside down "U") Terminations

Specific guidance for roof vent terminations using tee or 'U' configurations.

Certified PVC/CPVC Vent Termination Options (continued)

Basic Instructions for Cementing Joints

Steps for properly cementing PVC/CPVC joints for vent assembly.

Parts Information (continued)

Vent Components and Assigned Equivalent Lengths

Table listing vent components and their equivalent lengths for sizing.

PVC/CPVC Equivalent Vent Length Calculation Sheet

Condensate

DO NOT

Lists prohibited practices for condensate drainage.

MUST DO

Lists required practices for condensate drainage.

Checklist for Venting and Condensate (indoor models only)

A checklist for verifying proper venting and condensate management.

Installation of Plumbing

Pressure Relief Valve Requirements

Guidelines for installing the safety pressure relief valve.

Piping Requirements

General rules and requirements for water piping installation.

Isolation Valves and Pressure Relief Valve (PRV)

Isolation Valves Installation Instructions

Steps for installing the included isolation valves.

Pressure Relief Valve (PRV) Installation Instructions

Steps for installing the pressure relief valve.

Connect Water Heater to Water Supply

Checklist for Plumbing

A checklist for verifying correct plumbing installation.

Recirculation Modes

Sequence of Operation

Explains how the recirculation system operates based on settings.

Dedicated Mode

Details the dedicated return line recirculation mode.

Piping Diagram for Dedicated Return Installation

Cross Over Mode

Thermal By-pass Valve

Details the thermal by-pass valve used in cross-over recirculation.

Piping Diagram for Cross Over Installation

Cross Over Mode requires that the bypass plug located...

Installation of Gas Supply

General Instructions

Covers essential rules for connecting the gas supply.

Size the gas pipe

Guidance on calculating and selecting the correct gas pipe size.

Connect Electricity

Adjustment for High Altitude

Checklist for Gas and Electricity

Installation of Temperature Controller

Controller Location

Recommendations for optimal placement of the temperature controller.

Cable Lengths and Sizes

Specifies maximum cable lengths for controller wiring.

Mounting the controller

Final Checklist

A comprehensive pre-operation checklist for installation verification.

Technical Data

Specifications

Key technical data and performance ratings of the water heater.

Dimensions

Pressure Drop Curve and Water Flow Curves

Ladder Diagram

Operation Instructions

Important Facts about your Water Heater

Introductory information about the water heater's features and safety.

Consumer Operation Guidelines for the Safe Operation of your Water Heater

OPERATING INSTRUCTIONS

Step-by-step guide for starting and using the water heater.

How to Set the Temperature

Adjusting the Temperature

Detailed steps for setting the desired water temperature.

How to use the Temperature Controller

Temperatures Available with a Controller

Table showing selectable temperature ranges and modes.

How to use the Temperature Controller

Setting the Clock Time

Guide for setting the controller's internal clock.

How to use the Temperature Controller

Adjusting Timer Settings

Steps for programming the timer for circulation functions.

How to use the Temperature Controller

Circulation Function (with timer)

Explanation of the timer-based circulation feature.

How to use the Temperature Controller

Using the Circulation Function (with Override)

How to manually override or temporarily alter the circulation timer.

How to use the Temperature Controller

Controller Functions

Details on power saving, beep, clock, and temperature scale settings.

How to use the Temperature Controller

Lock Function

How to lock or unlock the controller buttons for safety.

Setting Priority

How to set priority among multiple connected temperature controllers.

Required Maintenance

Cleaning

Instructions for cleaning internal components, burners, and air passages.

Lime / Scale Build-up

Information on scale issues and flushing the heat exchanger.

Clean the water filter(s)

Procedure for cleaning the inlet water filters.

Pressure Relief Valve (PRV)

Visual Inspection of Flame

How to visually check the burner flame for correct operation.

Freeze Protection

Essential measures to protect the unit and water lines from freezing.

Flushing the Heat Exchanger

Manual Draining of the Water Heater

To manually drain the water

Steps for manually draining the unit for maintenance or winterization.

Diagnostic Codes

To Display Diagnostic Information

Procedure to access diagnostic codes on the controller.

Diagnostic Codes and Remedies

State Regulations

1. INSTALLATION OF CARBON MONOXIDE DETECTORS.

Mandated rules for installing carbon monoxide detectors.

Replacement Parts

Limited Warranty for Ultra Series RUR98i, RUR98e

What is covered?

Defines the scope and terms of the product's warranty coverage.

How long does warranty coverage last?

Specifies the warranty periods for different components and applications.

How do I get service?

What is not covered?

Lists exclusions and limitations of the product warranty.

EXTEND THE LABOR COVERAGE UNDER YOUR LIMITED WARRANTY*

RESIDENTIAL APPLICATIONS

Conditions for extending the labor warranty in residential settings.

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