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Rheem RTGH-RH11DV - Service Manual

Rheem RTGH-RH11DV
98 pages
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Service Manual
WARNING
–Donotstoreorusegasolineorother󰘱ammablevaporsandliquidsinthevicinityofthisoranyother
appliance.
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neighborsphone.Followthegassuppliersinstructions.
·Ifyoucannotreachyourgassupplier,callthe󰘰redepartment.
–Installationandservicemustbeperformedbyaquali󰘰edinstaller,serviceagencyorthegassupplier.
Iftheinformationintheseinstructionsisnotfollowedexactly,a󰘰reorexplosionmayresult,
causingpropertydamage,personalinjury,ordeath.
Models
CONDENSING TANKLESS GAS WATER HEATER
199,000Btu / 180,000Btu
Natural Gas
(
NG
) /
Liquid Propane Gas
(
LP
)

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Summary

Rheem Tankless Water Heater Service Manual Introduction

Critical Safety Warnings

Essential safety precautions to prevent fire, explosion, injury, or death.

Chapter 1: Product Characteristics

Chapter 2: Component Descriptions

In-depth explanation of each component, its function, and potential failures.

Chapter 4: Troubleshooting

Chapter 3: Installer Mode Configuration

Chapter 3: Error Code Handling

Troubleshooting Er:10, Er:11, Er:16

Specific troubleshooting steps for flame loss, ignition failure, and temperature sensor errors.

Chapter 3: Troubleshooting Specific Errors

Troubleshooting Er:20, Er:29, Er:31, Er:32, Er:33, Er:35, Er:39, Er:40

Troubleshooting steps for errors involving limit switches, pressure switches, and various thermistors.

Chapter 3: Troubleshooting Specific Errors (Continued)

Troubleshooting Er:41, Er:43, Er:44, Er:45, Er:60, Er:61, Er:65

Resolving errors for fan speed, burner overheating, leaks, and pump operation.

Troubleshooting Er:66, Er:67, Er:72, Er:73, Er:76, Er:78, Er:94

Resolving errors for mixing valves, AGM, communication failures, and exhaust temperature limits.

Chapter 4: Troubleshooting - Flame and Ignition

Er:10 Flame Loss Troubleshooting

Procedure for addressing flame loss errors, including checking connections and sensors.

Chapter 4: Troubleshooting - Ignition Issues

Er:11 Ignition Failure Troubleshooting

Steps to resolve ignition failure errors, checking the flame sensor and igniter.

Chapter 4: Troubleshooting - Temperature Errors

Er:16 Operating Temperature Error

Troubleshooting for overheating errors related to operating and DHW temperature sensors.

Chapter 4: Troubleshooting - Overheat Protection

Er:20 High Limit Switch Abnormality

Procedure for addressing high limit switch errors, checking switch resistance and settings.

Chapter 4: Troubleshooting - Airflow and Condensate

Er:29 Air Pressure Switch Abnormality

Troubleshooting for APS errors, checking connections, hoses, and condensate passages.

Chapter 4: Troubleshooting - Inlet Temperature Sensing

Er:31 DHW Inlet Thermistor Error

Procedure for resolving DHW inlet thermistor open or short circuit errors.

Chapter 4: Troubleshooting - Outlet Temperature Sensing

Er:32 DHW Outlet Thermistor Error

Procedure for resolving DHW outlet thermistor open or short circuit errors.

Chapter 4: Troubleshooting - Operating Temperature Sensing

Er:33 Operating Thermistor Error

Procedure for resolving operating thermistor open or short circuit errors.

Chapter 4: Troubleshooting - Exhaust Temperature Sensing

Er:35 Exhaust Thermistor Error

Procedure for resolving exhaust thermistor open or short circuit errors.

Chapter 4: Troubleshooting - False Flame Detection

Er:39 False Flame Sensing

Troubleshooting for false flame detection errors, checking front cover and flame sensor readings.

Chapter 4: Troubleshooting - Gas Leaks

Er:40 Gas Leakage

Procedure for addressing gas leakage errors, including leak testing and checking joints.

Chapter 4: Troubleshooting - Fan Speed Issues

Er:41 Excess Fan Speed

Troubleshooting for excess fan speed errors, checking APS, condensate, and pipes.

Chapter 4: Troubleshooting - Burner Safety

Er:43 Burner Limit Switch Abnormality

Procedure for resolving burner limit switch errors, checking connections and resistance.

Chapter 4: Troubleshooting - Water Leaks

Er:45 Water Leakage

Procedure for addressing water leakage errors, checking the detector and finding the leak source.

Chapter 4: Troubleshooting - Hot Water Temperature

Er:60 Hot Water Temperature Abnormality

Troubleshooting for DHW overheating errors, checking sensors and DIP switch settings.

Chapter 4: Troubleshooting - Fan Sensor Issues

Er:61 Fan RPM Sensor Abnormality

Procedure for addressing fan RPM sensor errors, checking wiring and connections.

Chapter 4: Troubleshooting - Water Flow Control

Er:65 Flow Control Valve Error

Troubleshooting for flow control valve errors, checking wiring and connections.

Chapter 4: Troubleshooting - Water Mixing Valve

Er:66 Water Mixing Valve Abnormality

Procedure for resolving water mixing valve errors, checking connections and leaks.

Chapter 4: Troubleshooting - Air Gas Mixer

Er:67 AGM Abnormality

Troubleshooting for AGM motor positioning errors, checking wiring and connections.

Chapter 4: Troubleshooting - Flame Before Ignition

Er:72 Flame Detected Before Igniter Abnormality

Procedure for addressing flame detected before ignition errors, checking front cover and sensor readings.

Chapter 4: Troubleshooting - DIP Switch Settings

Er:73 DIP Switch Setting Abnormality

Troubleshooting for DIP switch errors, ensuring correct settings based on unit capacity.

Chapter 4: Troubleshooting - Communication Errors

Er:76 Communication Error

Procedure for resolving communication errors between the control panel and circuit board.

Chapter 4: Troubleshooting - Cascade Systems

Er:78 Cascade Communication Abnormality

Troubleshooting for cascade communication failures, checking cables and installer mode settings.

Chapter 4: Troubleshooting - Exhaust Temperature

Er:94 Exhaust Temperature Exceeds Limit

Procedure for addressing exhaust temperature errors, checking thermistor and vent pipe.

Summary

Rheem Tankless Water Heater Service Manual Introduction

Critical Safety Warnings

Essential safety precautions to prevent fire, explosion, injury, or death.

Chapter 1: Product Characteristics

Chapter 2: Component Descriptions

In-depth explanation of each component, its function, and potential failures.

Chapter 4: Troubleshooting

Chapter 3: Installer Mode Configuration

Chapter 3: Error Code Handling

Troubleshooting Er:10, Er:11, Er:16

Specific troubleshooting steps for flame loss, ignition failure, and temperature sensor errors.

Chapter 3: Troubleshooting Specific Errors

Troubleshooting Er:20, Er:29, Er:31, Er:32, Er:33, Er:35, Er:39, Er:40

Troubleshooting steps for errors involving limit switches, pressure switches, and various thermistors.

Chapter 3: Troubleshooting Specific Errors (Continued)

Troubleshooting Er:41, Er:43, Er:44, Er:45, Er:60, Er:61, Er:65

Resolving errors for fan speed, burner overheating, leaks, and pump operation.

Troubleshooting Er:66, Er:67, Er:72, Er:73, Er:76, Er:78, Er:94

Resolving errors for mixing valves, AGM, communication failures, and exhaust temperature limits.

Chapter 4: Troubleshooting - Flame and Ignition

Er:10 Flame Loss Troubleshooting

Procedure for addressing flame loss errors, including checking connections and sensors.

Chapter 4: Troubleshooting - Ignition Issues

Er:11 Ignition Failure Troubleshooting

Steps to resolve ignition failure errors, checking the flame sensor and igniter.

Chapter 4: Troubleshooting - Temperature Errors

Er:16 Operating Temperature Error

Troubleshooting for overheating errors related to operating and DHW temperature sensors.

Chapter 4: Troubleshooting - Overheat Protection

Er:20 High Limit Switch Abnormality

Procedure for addressing high limit switch errors, checking switch resistance and settings.

Chapter 4: Troubleshooting - Airflow and Condensate

Er:29 Air Pressure Switch Abnormality

Troubleshooting for APS errors, checking connections, hoses, and condensate passages.

Chapter 4: Troubleshooting - Inlet Temperature Sensing

Er:31 DHW Inlet Thermistor Error

Procedure for resolving DHW inlet thermistor open or short circuit errors.

Chapter 4: Troubleshooting - Outlet Temperature Sensing

Er:32 DHW Outlet Thermistor Error

Procedure for resolving DHW outlet thermistor open or short circuit errors.

Chapter 4: Troubleshooting - Operating Temperature Sensing

Er:33 Operating Thermistor Error

Procedure for resolving operating thermistor open or short circuit errors.

Chapter 4: Troubleshooting - Exhaust Temperature Sensing

Er:35 Exhaust Thermistor Error

Procedure for resolving exhaust thermistor open or short circuit errors.

Chapter 4: Troubleshooting - False Flame Detection

Er:39 False Flame Sensing

Troubleshooting for false flame detection errors, checking front cover and flame sensor readings.

Chapter 4: Troubleshooting - Gas Leaks

Er:40 Gas Leakage

Procedure for addressing gas leakage errors, including leak testing and checking joints.

Chapter 4: Troubleshooting - Fan Speed Issues

Er:41 Excess Fan Speed

Troubleshooting for excess fan speed errors, checking APS, condensate, and pipes.

Chapter 4: Troubleshooting - Burner Safety

Er:43 Burner Limit Switch Abnormality

Procedure for resolving burner limit switch errors, checking connections and resistance.

Chapter 4: Troubleshooting - Water Leaks

Er:45 Water Leakage

Procedure for addressing water leakage errors, checking the detector and finding the leak source.

Chapter 4: Troubleshooting - Hot Water Temperature

Er:60 Hot Water Temperature Abnormality

Troubleshooting for DHW overheating errors, checking sensors and DIP switch settings.

Chapter 4: Troubleshooting - Fan Sensor Issues

Er:61 Fan RPM Sensor Abnormality

Procedure for addressing fan RPM sensor errors, checking wiring and connections.

Chapter 4: Troubleshooting - Water Flow Control

Er:65 Flow Control Valve Error

Troubleshooting for flow control valve errors, checking wiring and connections.

Chapter 4: Troubleshooting - Water Mixing Valve

Er:66 Water Mixing Valve Abnormality

Procedure for resolving water mixing valve errors, checking connections and leaks.

Chapter 4: Troubleshooting - Air Gas Mixer

Er:67 AGM Abnormality

Troubleshooting for AGM motor positioning errors, checking wiring and connections.

Chapter 4: Troubleshooting - Flame Before Ignition

Er:72 Flame Detected Before Igniter Abnormality

Procedure for addressing flame detected before ignition errors, checking front cover and sensor readings.

Chapter 4: Troubleshooting - DIP Switch Settings

Er:73 DIP Switch Setting Abnormality

Troubleshooting for DIP switch errors, ensuring correct settings based on unit capacity.

Chapter 4: Troubleshooting - Communication Errors

Er:76 Communication Error

Procedure for resolving communication errors between the control panel and circuit board.

Chapter 4: Troubleshooting - Cascade Systems

Er:78 Cascade Communication Abnormality

Troubleshooting for cascade communication failures, checking cables and installer mode settings.

Chapter 4: Troubleshooting - Exhaust Temperature

Er:94 Exhaust Temperature Exceeds Limit

Procedure for addressing exhaust temperature errors, checking thermistor and vent pipe.

Rheem RTGH-RH11DV Specifications

General IconGeneral
TypeTankless
Fuel TypeNatural Gas
Maximum Flow Rate11 GPM
Energy Factor0.82
Warranty12 years
Inlet Water Temperature Range40-90°F
Voltage120 V
Ignition TypeElectronic
VentingDirect Vent
Gas Connection3/4 inch
Water Connection3/4 inch
Temperature Adjustment Range98°F to 140°F

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