Rinnai HE Series User Manual

KBD Series Manual
How to use the Temperature Controller
The MC-91-2 controller is the standard temperature controller
that is supplied with the water heater. On indoor models it is
integrated into the front panel. The MCC-91-2 controller is for
commercial and hydronic applicaons requiring higher
temperatures. When the MCC-91-2 controller is connected,
these higher temperatures are available on all controller
models in the system. Refer to the secon on temperature
ranges.
DO NOT repeatedly operate the water heater and then use a
hot water tap while the controller is turned off. Operang the
water heater in this way to alternately produce hot water may
cause water to condense on the outside of internal parts and
accumulate in the water heater cabinet.
Dimensions (inches): 3.5 W x 4.75 H x 0.75 D
Temperature
Display
Priority
Indicator
Priority
Button
ON/OFF
Button
In Use
Indicator
Temperature
Selection
MC-91-2US
x Before operang, smell all around the appliance area for
gas. Be sure to smell next to the floor because some gas
is heavier than air and will sele on the floor.
x Keep the area around the appliance clear and free from
combusble materials, gasoline, and other flammable
vapors and liquids.
x Always check the water temperature before entering a
shower or bath.
x Do not use this appliance if any part has been under
water. Immediately call a licensed professional to
inspect the appliance and to replace any part of the
control system and any gas control which has been
under water.
x Should overheang occur or the gas supply fail to shut
off, turn off the manual gas control valve to the
appliance.
x Do not adjust the DIP switch unless specifically
instructed to do so.
x Do not use an extension cord or an adapter plug with
this appliance.
x Any alteraon to the appliance or its controls can be
dangerous and will void the warranty.
x If you install this water heater in an area that is known
to have hard water or that causes scale build-up the
water must be treated and/or the heat exchanger
flushed regularly. Rinnai provides a “Scale Control
System” that offers superior lime scale prevenon and
corrosion control by feeding a blend of control
compounds into the water supply. Damage and repair
due to corrosive compounds in the air is not covered by
warranty.
x Keep the air intake locaon free of chemicals, such as
chlorine or bleach, that produce fumes. These fumes
can damage components and reduce the life of your
appliance. Damage and repair due to scale in the heat
exchanger is not covered by warranty.
WARNING

Rinnai HE Series Specifications

General

Brand	Rinnai
Model	HE Series
Category	Water Heater
Language	English

Summary

How to use the Temperature Controller

How to Set the Temperature

Temperatures Available with a Controller

Alternate Temperature Settings

Details on alternative temperature settings available via DIPSW 2.

Tankless vs. Tank

The solution is recirculation

Hot water on your schedule

Push button and motion sensor ability

Explains how to activate recirculation using push buttons or motion sensors.

Direct Vent Tankless Water Heater Installation and Operation Manual

Safety Behaviors and Practices for the Consumer and Installer

Installer Qualifications

General Instructions

General instructions and requirements for installation.

Prepare for installation

Determine Installation Location

Environment

Environmental factors affecting installation location choice.

Water Quality

Evaluation of water quality for water heater operation and warranty.

Direct Vent Terminal Clearances (Indoor Units)

Other Than Direct Vent Terminal Clearances (Outdoor Units)

Additional clearances

Unit clearances

Freeze Protection

Recommendations for protecting the unit from freezing damage.

Maximum vent length

Checklist to Determine Installation Location

Mount to Wall

Steps for securely attaching the water heater to the wall.

Remove the Front Panel

Instructions for removing the front panel for access.

Installation of Venting (indoor models only)

Approved Vent Manufacturers and Products

List of approved manufacturers and their venting products.

Venting Guidelines

Determining Vent Configuration

Concentric Vent Configuration

Steps for setting up concentric vent configuration.

Determining Vent Configuration (continued)

Twin Pipe PVC/CPVC Configuration

Steps for setting up twin pipe PVC/CPVC vent configuration.

Flue Installation with Concentric Venting (indoor models only)

Flue Installation with Centrotherm Venting (indoor models only)

Twin Pipe PVC/CPVC Vent Installation

Certified PVC/CPVC Vent Termination Options

Vent Termination Configurations

Different approved configurations for vent terminations.

Termination Installation

Guidelines for securely fastening and sealing vent terminations.

Certified PVC/CPVC Vent Termination Options (continued)

PVC/CPVC Sidewall (Tee and Snorkel) Terminations

Guidelines for sidewall vent and combustion air piping with tee or snorkel.

Certified PVC/CPVC Vent Termination Options (continued)

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

Guidelines for roof vent and combustion air piping terminations.

Parts Information

Types of Acceptable PVC/CPVC Elbows for Venting System

Visual examples of acceptable and unacceptable PVC/CPVC elbows.

Parts Information (continued)

Vent Components and Assigned Equivalent Lengths:

Table of vent components and their equivalent lengths for calculations.

Condensate (indoor models only)

Checklist for Venting and Condensate (indoor models only)

Checklist for ensuring proper venting and condensate management.

Installation of Plumbing

Pressure Relief Valve Requirements

Requirements for installing an approved pressure relief valve.

Isolation Valves

Recommendation for installing isolation valves for maintenance.

Isolation Valves and Pressure Relief Valve (PRV)

Isolation Valves Installation Instructions:

Step-by-step guide for installing isolation valves.

Pressure Relief Valve Installation Instructions:

Step-by-step guide for installing the pressure relief valve.

Piping Diagram for Basic Installation

Connect Water Heater to Water Supply

Checklist for Plumbing

Checklist to ensure proper plumbing installation and leak-free connections.

Installation of Gas Supply

Guidelines and requirements for gas supply installation.

Size the gas pipe

Connect Electricity

Adjustment for High Altitude Installations

Setting DIP switches for altitude adjustments.

Adjustment for Vent Length (indoor models only)

Adjusting DIP switch SW1 for vent length requirements.

Installation of Temperature Controller

Controller Location

Guidelines for choosing an appropriate location for the controller.

Cable Lengths and Sizes

Specifications for controller cable length and gauge.

Mounting the controller

Final Checklist

Consumer Operation Guidelines for the Safe Operation of your Water Heater

How to use the Temperature Controller

How to Set the Temperature

Temperatures Available with a Controller

Alternate Temperature Settings

Details on alternate temperature settings available via DIPSW 2.

Dimensions

Pressure Drop and Water Flow Curves

Ladder Diagram

Recirculation Mode

Pump Requirements

Specifications for recirculation pump voltage, amperage, and check valve.

Pump Size

Guidelines for selecting the correct pump size for recirculation.

Recirculation Mode

Sequence of Operation

How the recirculation mode sequence operates with DIPSW 2 settings.

Economy Mode

Explanation of how Economy mode operates for recirculation.

Comfort Mode

Explanation of how Comfort mode operates for recirculation.

Manual Draining of the Water Heater

How to use the Temperature Controller

How to Set the Temperature

Temperatures Available with a Controller

Alternate Temperature Settings

Details on alternate temperature settings available via DIPSW 2.

Diagnostic Codes

To Display Diagnostic Information

Steps to display diagnostic information and codes on the controller.

Diagnostic Codes and Remedies

Required Maintenance

Cleaning

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

Lime / Scale Build-up

Information on diagnostic codes for scale build-up and flushing procedures.

Flushing the Heat Exchanger

Manual Draining of the Water Heater

State Regulations

Replacement Parts

Limited Warranty for Ultra Series RUC80i, RUC90i, RUC98i, RU80e, RU90e, RU98e

What is covered?

Details on what defects and workmanship issues are covered by the warranty.

What is not covered?

List of failures and operating difficulties not covered by the warranty.

EXTEND THE LABOR COVERAGE UNDER YOUR LIMITED WARRANTY*

REGISTRATION REQUIRED*

Information on how to register the product to extend labor coverage.

Rinnai Tankless Water Heater Troubleshooting Manual