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Rinnai RU98e User Manual

Rinnai RU98e
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Direct Vent Tankless Water Heater
Installaon and Operaon Manual
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WARNING

This manual provides informaon on the installaon, operaon, and maintenance of the water heater. For proper
operaon and , 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 4-32.
The consumer must read the enre manual to properly operate the water heater and to have regular maintenance
performed.

FOR INDOOR APPLICATIONS ONLY
RU80i .................... --
RU98i .................... --
FOR OUTDOOR APPLICATIONS ONLY
RU80e ................... --
RU98e ................... --

Table of Contents

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Rinnai RU98e Specifications

General IconGeneral
BrandRinnai
ModelRU98e
CategoryWater Heater
LanguageEnglish

Summary

Important Safety Information

Safety Definitions

Explains safety symbols like DANGER, WARNING, CAUTION.

Safety Behaviors and Practices

General Safety Warnings

Crucial warnings for safe operation, maintenance, and potential hazards.

Installation Instructions

Installer Qualifications

Details required skills for licensed professionals.

General Installation Guidelines

Covers DO NOTs and MUST DOs for proper installation.

Type of Installation

Specifies installation types for residential and commercial applications.

Prepare for Installation

Parts, Tools, and Materials Needed

Lists all items required before commencing installation.

Determine Installation Location

Environment Considerations

Discusses factors like corrosive air and ventilation for placement.

Water Quality Impact

Explains how water quality affects the heat exchanger and warranty.

Direct Vent Terminal Clearances (Indoor Units)

Clearance Requirements Table

Specifies minimum distances for vent terminals from various building features.

Other Than Direct Vent Terminal Clearances (Outdoor Units)

Clearance Requirements Table

Specifies minimum distances for outdoor vent terminals.

Additional Clearances

Important Vent Termination Location Considerations

Details specific restrictions and recommendations for vent termination placement.

Unit Clearances

Clearances for Indoor and Outdoor Models

Provides specific clearance dimensions for unit placement.

Freeze Protection

Winterizing Recommendations

Guidance on protecting the unit from freezing temperatures.

Maximum Vent Length

Concentric Venting Length Calculations

Tables and instructions for determining maximum vent lengths based on elbows.

Determine Installation Location Checklist

Wall Mounting and Panel Removal

Instructions for securing the unit to the wall and removing the front panel.

Installation of Venting (Indoor Models)

Approved Venting Manufacturers and Products

Lists certified vent system manufacturers and their products.

Venting Guidelines

DO NOT and MUST DO Venting Requirements

Rules for correct vent system installation and prohibited materials.

Flue Installation with Concentric Venting (Indoor)

Horizontal and Vertical Termination Procedures

Diagrams and instructions for installing concentric flue terminations.

Flue Installation with Centrotherm Venting (Indoor)

Vertical and Horizontal Termination Diagrams

Visual guide for Centrotherm venting termination configurations.

Twin Pipe PVC/CPVC Vent Installation

Ubbink Concentric to Twin Pipe Adaptor

Details on using the specific adaptor for PVC/CPVC vent systems.

Vent and Combustion Air Intake Piping Requirements

General Warnings and Guidelines

Critical safety information for vent and air intake piping.

Twin Pipe PVC/CPVC Vent Installation Requirements

Vent and Air Piping Materials

Specifies approved materials for PVC/CPVC vent and air intake piping.

Determining Total System Equivalent Length

Equivalent Vent Length Calculation Sheet

Provides a sheet to calculate total system equivalent vent lengths.

Maximum Vent Length Tables (Natural Gas Units)

Twin Pipe 4" PVC/CPVC Vent Lengths

Tables showing maximum vent lengths for natural gas units with 4" twin pipe.

Maximum Vent Length Tables (Propane Units)

Twin Pipe 3" and 4" PVC/CPVC Vent Lengths

Tables for propane units showing vent lengths for 3" and 4" twin pipe.

Adaptor Installation

Ubbink Adaptor Installation Steps

Step-by-step guide for installing the Ubbink adaptor.

Installation of PVC/CPVC Vent and Intake Air Piping

Required Parts for Assembly Configurations

Lists necessary components for 3" and 4" PVC/CPVC vent assembly.

Certified PVC/CPVC Vent Termination Options

Vent Termination Configurations

Describes the three available PVC/CPVC vent termination types.

Termination Installation Procedures

General guidelines for installing vent terminations.

IPEX Concentric Vent Kit (CVK) Installation

Specific instructions for installing the IPEX Concentric Vent Kit.

IPEX Concentric Vent Kit (CVK) Clearances

Acceptable Venting Clearances

Specifies acceptable clearance distances for IPEX CVK terminations.

Approved PVC/CPVC Vent Configurations

Venting Installation Sequence

Step-by-step process for installing approved PVC/CPVC vent configurations.

3” and 4” Low Profile Vent Termination Kits

Installation Instructions

Details on how to install the IPEX Low Profile termination kits.

PVC/CPVC Sidewall (Tee and Snorkel) Terminations

Termination Guidelines

Guidelines for locating and installing sidewall vent terminations.

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

Multiple Water Heater Installation – Through the Roof

Instructions for roof penetrations with multiple water heaters.

Pitched Roof Termination Clearances

Basic Instructions for Cementing Joints

Steps for properly cementing vent pipe joints.

Parts Information

Ubbink Concentric to Twin Pipe Adaptor

Details and physical data for the Ubbink adaptor.

Acceptable PVC/CPVC Elbows for Venting

Identifies acceptable and unacceptable elbow types for venting systems.

Vent Components and Assigned Equivalent Lengths

Approved PVC/CPVC Termination Components

Lists certified components and their equivalent lengths for vent systems.

Condensate (Indoor Models Only)

Venting and Condensate Checklist

Checklist to ensure proper venting and condensate handling.

Installation of Plumbing

Pressure Relief Valve Requirements

Specifications and requirements for installing the pressure relief valve.

Isolation Valves

Recommendation for installing isolation valves for maintenance.

Isolation Valves and Pressure Relief Valve

Isolation Valves Installation Instructions

Step-by-step guide for installing isolation valves.

Pressure Relief Valve Installation Instructions

Detailed steps for installing the pressure relief valve.

Piping Diagram for Basic Installation

Diagram Key

Explanation of symbols used in the basic piping diagram.

Connect Water Heater to Water Supply

Checklist for Plumbing

Ensures all plumbing connections are correctly made and checked.

Installation of Gas Supply

General Instructions and Warnings

Safety precautions and steps for gas supply installation.

Size the Gas Pipe

Gas Pipe Sizing Tables

Tables to determine correct gas pipe size based on length and gas type.

Connect Electricity

Grounding and Wiring Requirements

Electrical connection safety and requirements.

Adjust for High Altitude

DIP Switch Settings for Altitude

Instructions for setting DIP switches based on installation altitude.

Adjust for Vent Length (Indoor Models)

Checklist for Gas and Electricity

Installation of Temperature Controller

Controller Location and Cable Specifications

Guidelines for choosing controller placement and cable specifications.

Controller Configurations

Information on connecting multiple temperature controllers.

Mounting the Controller

Steps for Mounting and Wiring

Detailed instructions for physically installing the temperature controller.

Technical Data

Specifications

Key technical specifications for different Rinnai models.

Dimensions

Unit Dimensions and Connection Ports

Provides physical dimensions and port locations for all models.

Pressure Drop Curve

Outlet Flow Data

Charts showing water flow and pressure loss characteristics.

Ladder Diagram

Electrical Schematic

Diagram illustrating the electrical system of the water heater.

Recirculation Mode

Pump Requirements and Installation

Details for installing and configuring a recirculation pump.

DIP Switch Settings for Recirculation

Instructions for setting DIP switches for Economy and Comfort modes.

Recirculation Mode Operation

Sequence of Operation and Modes

Explains the operational sequence and modes for recirculation.

Operation Instructions

Important Facts About Your Water Heater

Key safety and operational information for the user.

Consumer Operation Guidelines

Safety Warnings Before Operation

Critical safety advice and steps before using the water heater.

Operating Instructions

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

How to Shut Off Gas to Appliance

Procedure for safely shutting off the gas supply.

How to Use the Temperature Controller

Controller Features and Warnings

Explains the MC-91-2 controller, its functions, and safety warnings.

How to Set the Temperature

Temperature Adjustment Procedure

Step-by-step guide on adjusting the water temperature setting.

Temperatures Available with a Controller

Available Temperature Settings

Lists available temperature ranges with and without controllers.

Alternate Temperature Settings

Details on alternative temperature settings and controller compatibility.

Temperature Options Without a Controller

Setting Controller to Mute

Locking the Controller

To Display Diagnostic Information

Diagnostic Codes

Displaying Diagnostic Information

How to access and view diagnostic codes and system status.

Required Maintenance

Cleaning Procedures

Instructions for cleaning the appliance's internal and external parts.

Water Filter Cleaning

Steps for cleaning the water inlet filter.

Freeze Protection and Winterizing

Gas, Water, Electric, and Vent Preparation

Steps for preparing the unit for winter to prevent freezing and damage.

Flushing the Heat Exchanger

Scale Removal Procedure

Detailed instructions for flushing the heat exchanger to remove scale.

Manual Draining of the Water Heater

Draining Procedure and Resuming Operation

Instructions for manually draining the unit and returning it to service.

Preventing Freezing with Low Water Flow

Method to prevent freezing when water flow is minimal.

State Regulations

Massachusetts Specific Requirements

Regulations regarding carbon monoxide detectors and signage in MA.

Replacement Parts

Parts List and Item Numbers

Identifies replacement parts with corresponding technical sheet item numbers.

Extend Labor Coverage Under Limited Warranty

Registration Requirements

Information on how to register for extended warranty coverage.

Warranty Conditions for Applications

Details warranty conditions for residential and commercial applications.

Limited Warranty Details

What is Covered and Warranty Duration

Outlines what is covered by the warranty and for how long.

Rinnai's Warranty Service Actions

Explains Rinnai's process for repairs or replacements.

Obtaining Warranty Service

What is Not Covered by Warranty

Warranty Limitations

Installation Instructions

Installer Qualifications

Describes the necessary skills and certifications for installers.

General Installation Instructions

Key DO NOTs and MUST DOs for proper installation.

Type of Installation

Specifies installation types for residential and commercial applications.

Prepare for Installation

Included Parts, Required Tools, and Materials

Lists all necessary items for installation preparation.

Determine Installation Location

Water Quality Evaluation

Guidance on assessing water quality and its impact on the unit.

Environment Considerations

Factors related to the installation environment and potential corrosive compounds.

Important Considerations for Indoor/Outdoor Units

Specific guidelines for placement based on unit type and environment.

Chimney Termination Clearances (ANS Z21.10.3, CSA 4.3)

Clearance Requirements Table

Specifies clearances for chimney terminations in Canada and USA.

Additional Clearances

Vent Termination Location Considerations

Details on avoiding problematic vent termination locations.

Unit Clearances

Clearances for Indoor and Outdoor Models

Specific clearance measurements for unit placement.

Maximum Vent Length for Concentric Venting

Propane and Natural Gas Vent Length Tables

Tables showing maximum vent lengths based on elbows for different gas types.

Freeze Protection

Winterizing Recommendations

Tips to protect the unit from freezing.

Checklist for Determining Installation Location

Wall Mounting Procedure

Steps for securely mounting the water heater to the wall.

Front Panel Removal

Instructions on how to remove the front panel.

Installation of Air Intake (Indoor Models)

Vent Manufacturer Guidelines

Directives for installing air intake systems according to vent manufacturers.

Chimney Installation (Concentric, Indoor Models)

Chimney Installation (Centrotherm, Indoor Models)

Condensate (Indoor Models)

Venting and Condensate Checklist

Checklist to ensure proper venting and condensate handling.

Installation of Plumbing

Safety Valve Requirements

Standards and requirements for installing the safety valve.

Isolation Valves

Importance of installing isolation valves for maintenance.

Install Ball Valve / Pressure Relief Valve

Installation Instructions for Valves

Step-by-step guide for installing isolation and pressure relief valves.

Recommended Piping for Basic Installation

Diagram Key

Explanation of symbols used in the basic piping diagram.

Connect Water Heater to Water Supply

Checklist for Plumbing

Ensures all plumbing connections are correctly made and checked.

Installation of Gas Supply

General Instructions and Warnings

Safety precautions and steps for gas supply installation.

Gas Pipe Sizing

Gas Pipe Sizing Tables

Tables to determine correct gas pipe size based on length and gas type.

Connect Electricity

Grounding and Wiring Requirements

Electrical connection safety and requirements.

Adjust for High Altitude

DIP Switch Settings for Altitude

Instructions for setting DIP switches based on installation altitude.

Adjust for Vent Length (Indoor Models)

Checklist for Gas and Electricity

Installation of Temperature Controller

Controller Location and Cable Specifications

Guidelines for choosing controller placement and cable specifications.

Controller Mounting Procedure

Steps for mounting the temperature controller.

Ladder Diagram

Electrical Schematic

Diagram illustrating the electrical system of the water heater.

Operation Instructions

Important Facts About Your Water Heater

Key safety and operational information for the user.

Consumer Operation Guidelines

Safety Warnings Before Operation

Critical safety advice and steps before using the water heater.

Operating Instructions

Step-by-step guide for starting and operating the unit.

How to Shut Off Gas to Appliance

Procedure for safely shutting off the gas supply.

How to Use the Temperature Controller

Controller Features and Warnings

Explains the MC-91-2 controller, its functions, and safety warnings.

Remote Temperature Options

Information on setting temperatures without a remote controller.

How to Set the Temperature

Temperature Adjustment Procedure

Step-by-step guide on adjusting the water temperature setting.

Temperatures Available with a Controller

Available Temperature Settings

Lists available temperature ranges with and without controllers.

Alternate Temperature Settings

Details on alternative temperature settings and controller compatibility.

Diagnostic Codes

Displaying Diagnostic Information

How to access and view diagnostic codes and system status.

Required Maintenance

Cleaning Procedures

Instructions for cleaning the appliance's internal and external parts.

Water Filter Cleaning

Steps for cleaning the water inlet filter.

Freeze Protection and Winterizing

Gas, Water, Electric, and Vent Preparation

Steps for preparing the unit for winter to prevent freezing and damage.

Flushing the Heat Exchanger

Scale Removal Procedure

Detailed instructions for flushing the heat exchanger to remove scale.

Manual Draining of the Water Heater

Draining Procedure and Resuming Operation

Instructions for manually draining the unit and returning it to service.

Preventing Freezing with Low Water Flow

Method to prevent freezing when water flow is minimal.

State Regulations

Massachusetts Specific Requirements

Regulations regarding carbon monoxide detectors and signage in MA.

Replacement Parts

Parts List and Item Numbers

Identifies replacement parts with corresponding technical sheet item numbers.

Extend Labor Coverage Under Limited Warranty

Registration Requirements

Information on how to register for extended warranty coverage.

Warranty Conditions for Applications

Details warranty conditions for residential and commercial applications.

Limited Warranty Details

What is Covered and Warranty Duration

Outlines what is covered by the warranty and for how long.

Rinnai's Warranty Service Actions

Explains Rinnai's process for repairs or replacements.

Obtaining Warranty Service

What is Not Covered by Warranty

Warranty Limitations

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