Rheem RTGH-95DVELN-3 - User Manual

Do not destroy this manual. Please read carefully
and keep in a safe place for future reference.
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ULTRA
Low NOx
Emissions
SCAQMD Rule 1146.2
WARNING:
If the information in these instructions is not
followed exactly, a fire or explosion may result,
causing death, personal injury, or property dam-
age.
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.
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SUPER HIGH EFFICIENCY CONDENSING
TANKLESS WATER HEATER
USE AND CARE MANUAL
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.
With Installation Instructions
for the Installer
Condensing Direct Vent
199,900 Btu/hr, 180,000 Btu/hr,
157,000 Btu/hr and 120,000 Btu/hr Models
AP21820 Rev 04

Rheem RTGH-95DVELN-3 Specifications

General

Type	Tankless
Fuel Type	Natural Gas
Maximum Flow Rate	9.5 GPM
Warranty	15 years
GPM @ 35°F Rise	9.5 GPM
Voltage	120V
Amperage	0.5 A
Width	18.5 inches
Thermal Efficiency	Up to 94%
Ignition Type	Electronic
Venting	Direct Vent
Energy Factor	0.93 UEF
GPM @ 45°F Rise	7.4 GPM
GPM @ 77°F Rise	4.3 GPM
Inlet/Outlet	3/4" NPT
Gas Connection	3/4" NPT

Summary

What to Do If You Smell Gas

Important Safety Information

Safety Precautions

General safety rules and warnings to prevent hazards.

Water Heater Venting Safety

Water Supply Safety

Natural Gas and Liquefied Petroleum Safety

Electrical Safety

General Installation and Maintenance Safety

INSTALLATION INSTRUCTIONS FOR THE CONTRACTOR

Standards Compliance

Choosing a Location

Guidelines for selecting a safe and appropriate installation location.

Water Heater Installation

Mounting the Water Heater

Venting for Direct-Vent Water Heater

Vent Length and High Altitude DIP switch Adjustments

Horizontal Vent Terminal Location for Other than Direct Vent;Outdoor Heater

Horizontal Vent Considerations

Horizontal Vent and Combustion, Air-Inlet Alternate

Vent Riser Terminal Installation

Vertical Vent Installation

Vertical Vent Terminal Location

Water Quality

Water Supply

Requirements and precautions for the water supply system.

Thermal Expansion

Water Supply Connections

Procedures and precautions for connecting water supply lines.

Water Supply Installation

Relief Valve

Condensate Drainage

Gas Supply

Gas Supply System

Requirements for the gas supply system, including type and connections.

Determining the required pipe size

Gas Supply Installation

Leak Testing

Pressure Testing the Gas Supply System

Electrical Wiring

Wiring Diagram

Installation Precautions

Activating the Water Heater

Shutting Off the Water Heater

Setting the Water Temperature

Recirculation Pump Control

Recirculation Pump Control - Installation

Recirculation Operation

Mode Setting -Timer Mode-

Recirculation Operation - On-Demand mode-

Recirculation Operation - Schedule mode-

Water Saving Control

Water Heater Inspections

Venting System (Direct Vent Only)

Condensate Collector

Care and Cleaning

Water Filter Cleaning

Preventive Maintenance

User Preventive Maintenance

Draining the Water Heater

Freeze Protection

Troubleshooting Chart

Service Error Code Chart

Call for Assistance