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Rheem RMTGH95DV User Manual

Rheem RMTGH95DV
72 pages
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94% CONDENSING
TANKLESS
WATER HEATER
AP15896-1(11/10)
Printed in USA
*All models available for natural gas (N) or
propane gas (P) usage.
Do not destroy manual. Please
read carefully and keep in a
safe place for future reference.
CERTIFIED
R
Direct Vent
Models
Rheem/EcoSense
RTGH-95DV*
RTGH-84V*
ECOH200DV*
ECOH160DV*
Paloma/Wai Wela
PHH-32RDV*
PHH-25RDV*
Ruud
RUTGH-95DV*
RUTGH-84DV*
Richmond
RMTGH95DV*
RMTGH84DV*
Outdoor
Models
Rheem/EcoSense
RTGH-95X*
RTGH-84X*
ECOH200X*
ECOH160X*
Paloma/Wai Wela
PHH-32ROF*
PHH-25ROF*
Ruud
RUTGH-95X*
RUTGH-84X*
Richmond
RMTGH95X*
RMTGH84X*
WARNING:
If the information in these
instructions is not followed
exactly, a fire or explosion
may result, causing death,
personal injury, or property
damage.
For Your Safety!
Do not store or use gasoline
or other flammable vapors
and liquids in the vicinity of
this or any other appliance.
To do so may result in an
explosion or fire.
Installation and service
must be performed by a
qualified installer, service
agency, or the gas supplier.
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.
Do not return to your home
until authorized by the gas
supplier or fire department.
D
E
S
I
G
N
C
E
R
T
I
F
I
E
D
®
USE AND CARE MANUAL
With Installation Instructions
for the Installer
Water Heaters for Other Than
Recreational Vehicle Installation Only
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Rheem RMTGH95DV Specifications

General IconGeneral
BrandRheem
ModelRMTGH95DV
CategoryWater Heater
LanguageEnglish

Summary

Important Safety Information

Safety Precautions

General safety rules, symbols, and warnings for safe operation and installation.

What to Do If You Smell Gas

Step-by-step guide for gas leak detection and immediate response actions.

Product Information

For Your Records

Section to log model, serial, installation date, and contractor details.

Water Heater Venting Safety

Dangers of Improper Venting

Risks associated with incorrect vent installation, including fire, explosion, and carbon monoxide.

Flammable Vapors and Clearances

Warnings about flammable materials near the heater and required clearances.

Water Supply Safety

Water Temperature Dangers

Critical warnings about high water temperatures causing severe burns and scalds.

Water Supply Conditions

Specifies acceptable water quality, temperature ranges, and connection requirements.

Natural Gas and Liquefied Petroleum Safety

Fuel Type and Gas Piping Safety

Dangers of fuel conversion and rules for safe gas piping installation.

Gas Leak Precautions

Instructions on detecting and responding to suspected gas leaks.

Operating Safety Instructions

Before Operating Checklist

Key safety checks and verifications required before initial operation.

Operating and Shut-Off Procedures

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

Electrical Safety

Shock Hazard Warnings

Dangers of electrical shock and requirements for safe wiring and grounding.

California Installation Requirements

Specific bracing requirements for earthquake safety in California.

General Installation and Maintenance Safety

Installation and Code Compliance

Importance of following installation instructions and adhering to local codes.

Preventive Maintenance Recommendations

User's role in routine maintenance for dependable operation.

Product Specifications

Direct-Vent Models Dimensions

Physical dimensions and connection points for direct-vent models.

Outdoor Models Dimensions

Physical dimensions and connection points for outdoor models.

Model Specifications Comparison

157k BTU Models Specifications

Detailed technical specifications for 157k BTU models.

199.9k BTU Models Specifications

Detailed technical specifications for 199.9k BTU models.

Direct-Vent Water Heater Components

System Diagram

Illustration of a typical direct-vent water heater and its connections.

Outdoor Water Heater Components

System Diagram

Illustration of a typical outdoor water heater and its connections.

Outdoor Model Installation Warning

Critical warning against indoor installation of outdoor models.

Using Your Water Heater Safely

Flammable Vapor Precautions

Safety warnings regarding flammable vapors near the unit and general precautions.

Setting Water Temperature Safely

Critical information on safe water temperature settings and scald risks.

Water Temperature Control

Remote Control Operation

How to use the remote control to adjust water temperature settings.

Water Heater Operational Facts

Key facts and safety considerations for water heater use.

Water Heater Inspections and Maintenance

Venting System Inspection

Annual checks for vent security, airtightness, and proper function.

Condensate Collector Maintenance

Inspecting and managing the acidic condensate and its drainage.

Burner Inspection Procedures

Visual Burner Check

Steps for visually inspecting the main burner flame and condition annually.

Care and Cleaning Procedures

Electrical Safety During Cleaning

Warning about disconnecting power before performing any cleaning.

General Cleaning Guidelines

How to clean the unit, remote control, and check air intake.

Water Filter Cleaning

Filter Removal and Cleaning

Steps for unscrewing, cleaning, and replacing the water filter.

Preventive Maintenance Schedule

User Maintenance Tasks

Monthly and annual maintenance tasks recommended for the user.

Professional Maintenance

Recommended periodic inspections by qualified service technicians.

Draining the Water Heater

Safety Warning for Draining

Critical warning about scalding risk and product damage during draining.

Draining Procedure Steps

Step-by-step guide to safely drain the water heater.

Reconnecting After Draining

Steps to Put Heater Back in Service

Procedures for reinstalling components and restarting the unit.

Freeze Protection Methods

Standard Drain Method

Explanation of the standard method for draining the water heater.

Running Water Freeze Protection

Method to prevent freezing using continuous water flow.

Troubleshooting Common Issues

No or Insufficient Hot Water

Diagnosing and resolving issues with no or low hot water supply.

Safety During Troubleshooting

Critical safety warnings for troubleshooting electrical or gas components.

Troubleshooting Continued

Water Not Hot Enough

Causes and solutions for water not reaching the desired temperature.

Water Too Hot

Causes and solutions for excessively hot water.

Service Error Code Diagnostics

Interpreting Error Codes

How the unit displays and indicates errors via codes.

Troubleshooting Error Code Persistence

Steps to take if an error code continues to display after initial attempts.

Error Code Reference and Service

Specific Error Code Solutions

Table listing error codes, their possible causes, and recommended solutions.

How to Call for Assistance

Information required and contact details for manufacturer service.

Installation Standards and Location

Compliance with Codes

Adherence to national, local, and utility codes for installation.

Choosing an Installation Location

Guidelines for selecting a safe and appropriate location for the unit.

Location Requirements and Clearances

Vent Terminal Placement

Diagram and rules for horizontal vent terminal locations and spacing.

Installation Restrictions

Prohibited locations and required clearances from combustible materials.

Product Inspection and Environment

Pre-Installation Inspection

Checking for damage and verifying parts presence before installation.

Corrosive Atmosphere Warning

Avoiding installation near corrosive substances that can damage the unit.

Direct-Vent Installation Diagram

Typical Direct-Vent Setup

Illustration of a typical direct-vent water heater installation with venting.

Outdoor Installation Diagram

Typical Outdoor Setup

Illustration of a typical outdoor water heater installation without venting.

Outdoor Model Installation Warning

Critical warning against indoor installation of outdoor models.

Mounting the Water Heater

Wall Mounting Precautions

Caution regarding wall reinforcement and secure mounting of the unit.

Direct-Vent Water Heater Venting

Venting Safety and Requirements

Critical safety rules and code requirements for venting.

Recommended Vent Lengths

Charts specifying maximum and minimum vent pipe lengths based on elbows.

Venting Installation Details

Horizontal Venting Considerations

Advice on vent pipe slope, support, material, and avoiding stresses.

Preexisting Venting System Inspection

Procedures for inspecting existing vent systems during replacement.

Massachusetts Venting Regulations

Carbon Monoxide Detector Requirements

Specific rules for CO detector installation in Massachusetts.

Horizontal Vent Terminal Location Diagram

Horizontal Vent Terminal Clearances

Horizontal Venting Considerations

Condensate Management and Venting

Managing condensate and avoiding damage from freezing.

Indoor Multi-Unit Venting Spacing

Minimum spacing requirements for multiple indoor units to prevent gas recirculation.

Horizontal Vent Installation Procedures

Solvent Cement and Pipe Joining

Instructions and warnings for using solvent cements and joining pipes.

Approved Vent Pipe Materials

List of acceptable materials for vent piping used in installation.

Horizontal Vent Installation Details

Fastener Types and Vent Terminal Spacing

Guidance on fasteners for different wall types and vent terminal spacing.

Alternative Horizontal Venting Kits

Vertical Vent Installation Procedures

Venting Safety and Requirements

Warnings and recommendations for vertical vent installation.

Air Intake Condensate Trap

Installing a trap to prevent condensate entry into the air intake.

Vertical Vent Terminal Location Guidelines

Standard Vertical Vent Termination Diagram

Alternative Vertical Vent Termination Kits

Water Supply Requirements

Acceptable Water Quality Levels

Chart detailing recommended water quality parameters for optimal performance.

Thermal Expansion Tank Requirement

Explains the need for an expansion tank in recirculation systems.

Water Supply Connection Guidelines

Water Pressure and Flow Rate Requirements

Essential water pressure and flow rates for proper heater operation.

Water Supply Installation Notices

Important notes regarding water supply line installation.

Water Piping Arrangement and Maintenance

Water Filter Service

Procedures for checking, cleaning, and replacing the water filter.

Hot Water Outlet Connection Guidelines

Tips for connecting hot water outlets efficiently and conserving energy.

Relief Valve Installation and Safety

Pressure-Relief Valve Requirements

Specifications and installation requirements for pressure-relief valves.

Discharge Line Requirements

Proper routing, protection, and installation of the relief valve discharge line.

Pipe Insulation and Condensate Management

Hot and Cold Pipe Insulation

Guidance on insulating pipes for energy efficiency and freeze protection.

Condensate Drainage Procedures

Proper methods for draining condensate and preventing blockages.

Gas Supply Connections and Safety

Gas Type Conversion Warning

Critical warning against converting the unit's gas type.

Gas Piping Code Compliance

Adherence to gas piping codes and use of appropriate compounds.

Gas Piping Sizing Guide

Gas Supply Installation Steps

Manual Gas Shut-Off Valve Installation

Installing shut-off valves, unions, and sediment traps for gas supply.

Gas Leak and Pressure Testing

Safe Leak Testing Procedures

Warnings and methods for testing gas connections for leaks.

Gas Pressure Testing Precautions

Cautions for pressure testing the gas supply system.

High Altitude and Electrical Considerations

High-Altitude Installation Adjustments

Guidance for installing the unit at higher elevations and required adjustments.

Electrical Wiring Safety

Critical warnings and compliance rules for electrical wiring.

Electrical Wiring Diagram

Remote Control Functionality and Placement

Remote Control Selection and Location

Guidelines for choosing and positioning remote controls for optimal use.

Remote Control Wall Installation

Connecting Remote Control to Wall

Step-by-step instructions for mounting the remote control on a wall.

Connecting Remote Control to Water Heater

Insulation Blankets and Installation Precautions

External Insulation Blanket Warnings

Warnings about potential hazards of using external insulation blankets.

General Installation Precautions

Final checks and precautions before operating the installed unit.

Installation Checklist

Water Heater Location Checklist

Items to verify regarding the water heater's installation location.

Venting Checklist (Indoor Models)

Items to verify for correct indoor venting installation.

Water Supply/Relief Valve Checklist

Items to verify for water supply and relief valve installation.

Gas Supply Checklist

Items to verify for proper gas supply connections.

Electrical Wiring Checklist

Items to verify for correct electrical wiring installation.

Condensate Checklist

Item to verify for proper condensate drain installation.

Lighting the Water Heater - Safety First

Pre-Operation Safety Checklist

Critical safety checks and warnings before lighting the unit.

Operating and Shut-Off Instructions

Step-by-step guide to operate and turn off the heater.

Water Heater Lighting and Shut-Off

Lighting Procedure

Steps to safely light the water heater burner.

Shutting Off Procedure

Steps to safely shut down the water heater.

Setting Water Temperature - Maximum Adjustment

Dangers of High Temperatures

Severe risks associated with water temperatures exceeding 125°F (52°C).

Adjusting Maximum Temperature via Remote

How to adjust the maximum temperature setting using the remote control.

Water Temperature Adjustment Details

Setting Temperature Up to 140°F

Step-by-step guide to set the temperature up to 140°F (60°C).

Limiting Maximum Temperature to 120°F

Procedure to cap the maximum temperature setting at 120°F (49°C).

Minimum Temperature Adjustment

Setting Temperature Down to 85°F

Steps to adjust the minimum temperature setting down to 85°F (29°C).

High-Altitude Adjustment Requirement

When and why DIP switch adjustments are needed for high altitudes.

High-Altitude DIP Switch Adjustment Steps

Parts Ordering Information

Required Information for Parts Orders

What details are needed when ordering replacement parts.

Direct-Vent Gas Components Diagram

Labeled diagram of components for direct-vent models.

Parts Ordering (Continued)

Outdoor Gas Components Diagram

Labeled diagram of components for outdoor models.

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