Rheem MHD85245 User Manual

Water Heaters
Light Duty Commercial Electric
The purpose of this manual is twofold:
one, to provide the installer with the basic
directions and recommendations for the proper
installation and adjustment of the water heater;
and two, for the owner–operator, to explain
the features, operation, safety precautions,
maintenance and troubleshooting of the water
heater. This manual also includes a parts list.
It is imperative that all persons who are
expected to install, operate or adjust this
water heater read the instructions carefully
so they may understand how to perform
these operations. If you do not understand
these instructions or any terms within it, seek
professional advice.
Any questions regarding the operation,
maintenance, service or warranty of this
water heater should be directed to the seller
from whom it was purchased. If additional
information is required, refer to the warranty.
Do not destroy this manual. Please read
carefully and keep in a safe place for future
reference.
!
Recognize this symbol as an
indication of Important Safety
Information!
Double Element Models,
75, 85, 105 Gallon
AP17946-3 Rev. 4
Use & Care Manual
With Installation Instructions for the Installer

Rheem MHD85245 Specifications

General

Brand	Rheem
Model	MHD85245
Category	Water Heater
Language	English

Summary

Important Safety Information

Water Temperature and Scalding Risks

Discusses dangers of high water temperatures and provides a time/temperature scald chart.

General Safety Warnings and Requirements

California Installation Requirements

California law requires bracing for water heaters due to earthquake risks.

Water Heater Installation Guide

Local Installation Regulations

Requirements for installation based on local codes, utility codes, and NEC.

Location Selection Criteria

Guidance on choosing a suitable location for the water heater installation.

Installation Procedures

Thermal Expansion Management

Explains thermal expansion in water systems and potential issues like closed water systems.

Vacuum Relief Valve Installation

Details the function and importance of the factory-installed vacuum relief valve.

Installation Details

Relief Valve and Drain Pan Installation

Instructions for relief valve installation and drain pan requirements.

Connection and Filling

Water Supply Connections

Guidance on connecting hot and cold water supply lines.

Filling the Water Heater

Step-by-step instructions on how to properly fill the water heater.

Installation Overview

Typical Installation Diagram

Illustrates a typical water heater installation setup with key components.

Electrical Setup

Electrical Connections Guide

Details on making proper electrical connections, including circuit sizing and grounding.

Electrical Sizing and Diagrams

Branch Circuit Sizing

Guide for sizing branch circuits and wire sizes based on National Electric Code.

Wiring Diagrams

Visual representation of electrical wiring for the water heater.

Installation Accessories

Insulation Blanket & Pipe Insulation

Information on insulation blankets and pipe insulation installation.

Installation Checklist

Operating the Water Heater

Operational Safety Precautions

Essential safety precautions to follow during water heater operation.

Safety Controls and Temperature Setting

Explanation of safety controls and how to adjust water temperature.

Thermostat Adjustment Procedures

Setting Water Temperature

Step-by-step guide on how to adjust the water heater thermostat.

Care and Cleaning

Draining and Maintenance

Procedure for draining, routine maintenance, and extended shutdown.

Troubleshooting Common Issues

Problem Resolution Guide

Common problems and their solutions to help diagnose issues before calling for service.

Replacement Parts List

Replacement Parts Illustration

Element Replacement Instructions

Limited Warranty Information

Warranty Period and Claims

Warranty Period Details

Outlines applicable warranty periods for different installation types.

How to Make a Warranty Claim

Step-by-step process for submitting a warranty claim.

Owner Record Keeping and Product Registration

Product Registration Process

Service and Support