Rheem IKONIC RTGH-SR11i User Manual

TANKLESS
WATER HEATERS
TECHNICAL TRAINING AND
SERVICE MANUAL
RTGH-S11i RTGH-S10i RTGH-S84i
RTGH-SR11i RTGH-SR10i RTGH-SR84i
CRTGH-S11i CRTGH-S10i CRTGH-S84i
CRTGH-SR11i CRTGH-SR10i CRTGH-SR84i
RUTGH-S11i RUTGH-S10i RUTGH-S84i
RUTGH-SR11i RUTGH-SR10i RUTGH-SR84i
CRUTGH-S11i CRUTGH-SR11i
AP23209 Rev 03

Rheem IKONIC RTGH-SR11i Specifications

General

Type	Tankless
Fuel Type	Natural Gas
Maximum Flow Rate	11.1 GPM
Water Connection	3/4" NPT
Voltage	120V
Ignition Type	Electronic
Maximum Water Pressure	150 PSI
Temperature Adjustment Range	98°F - 140°F
Temperature Range	98°F to 140°F
Venting	Direct Vent
Gas Connection	3/4" NPT
Warranty	12-Year Heat Exchanger, 5-Year Parts, 1-Year Labor

Summary

Safety and Introduction

Electrical Shock Safety Precautions

Essential safety measures for electrical hazards during service.

Flammable Liquids and Vapors Warnings

Critical warnings about handling flammable materials near the unit.

Troubleshooting Tools

Measuring Voltage and Resistance

Procedures for testing electrical components using meters.

General Information

IKONIC Tankless Water Heater Specifications

Detailed technical specifications for various models.

Venting System Requirements

Guidelines and materials for proper vent installation.

User Interface and Options

Setting the Water Temperature

Guide to adjusting the desired water temperature output.

Service Menu Functions

Viewing and Clearing Current Alarms

Error Code Diagnostics

Troubleshooting No Hot Water Error

Diagnosing issues when no error code is displayed but no hot water.

Error A011 Flame Detection Failure

Error A014 Over Heat Limiter

Error A031 Inlet Thermistor Malfunction