Table of Contents
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TECHNICAL TRAINING AND
SERVICE MANUAL
TANKLESS
WATER HEATERS
RTGH-S11i
RTGH-SR11i
CRTGH-S11i
CRTGH-SR11i
RUTGH-S11i
RUTGH-SR11i
CRUTGH-S11i
RTGH-S10i
RTGH-SR10i
CRTGH-S10i
CRTGH-SR10i
RUTGH-S10i
RUTGH-SR10i
CRUTGH-SR11i
RTGH-S84i
RTGH-SR84i
CRTGH-S84i
CRTGH-SR84i
RUTGH-S84i
RUTGH-SR84i
AP23209 Rev 03
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Table of Contents
Related Manuals for Rheem IKONIC RTGH-S11i
Summary of Contents for Rheem IKONIC RTGH-S11i
- Page 1 TECHNICAL TRAINING AND SERVICE MANUAL TANKLESS WATER HEATERS 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...
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Page 2: Table Of Contents
IKONIC Tankless Water Heater Service Manual CONTENTS SAFETY AND INTRODUCTION .......................4 TROUBLESHOOTING TOOLS ......................5 MEASURING VOLTAGE AND RESISTANCE ................5 GENERAL INFORMATION ......................6 CROSSOVER VALVE ............................6 FUEL CONVERSION ............................. 6 SPECIFICATIONS ..............................7 FLOW RATE ................................8 PRESSURE DROP AND TEMPERATURE RISE CURVE ..................9 DIRECT-VENT GAS COMPONENTS ........................ - Page 3 IKONIC Tankless Water Heater Service Manual CONTENTS ERROR A029 ................................. 45 ERROR A031 ................................. 46 ERROR A032 ................................. 47 ERROR A033 ................................. 48 ERROR A035 ................................. 49 ERROR A036 ................................. 50 ERROR A055 ................................. 51 ERROR A061 ................................. 52 ERROR A063 ................................. 53 ERROR A065 .................................
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Page 4: Safety And Introduction
IKONIC Tankless Water Heater Service Manual SAFETY AND INTRODUCTION FLAMMABLE LIQUIDS AND VAPORS The purpose of this manual is to provide technical and troubleshooting information to technicians and service professionals ONLY. Homeowners should consult the Gasoline, as well as other flammable material and liquids Use and Care Manual (AP22745) for general informa- (adhesives, solvents, etc.), and their vapors are extremely tional and installation inquiries or contact technical sup-... -
Page 5: Troubleshooting Tools
IKONIC Tankless Water Heater Service Manual TROUBLESHOOTING TOOLS SAFETY FIRST Your safety and safety of others is very important. This manual is only intended for qualified service techni- cians. ALWAYS USE CAUTION while testing voltages and/or gas supply. MULTI-METER MULTI-METER MANOMETER NEEDLE LEADS NEEDLE SET... -
Page 6: General Information
IKONIC Tankless Water Heater Service Manual GENERAL INFORMATION GENERAL PRODUCT INFORMATION CROSSOVER VALVE NOTE: DO NOT install multiple crossover valves when using only one Tankless Water Heater. If a crossover valve is used, it should be located at the farthest faucet. See drawing below for information re- NOTE: To ensure optimal performance and reliability, garding crossover valve placement. -
Page 7: Specifications
IKONIC Tankless Water Heater Service Manual GENERAL INFORMATION SPECIFICATIONS RTGH-S11i RTGH-S10i RTGH-S84i SPECIFICATION RTGH-SR11i RTGH-SR10i RTGH-SR84i Width 17.3 in (440 mm) Dimensions Height 28.6 in (726 mm) Depth 13.7 in (348 mm) Approval Gas Type Natural (NG) and Liquid Propane (LP) Maximum Gas Consumption 199,900 Btu/h 180,000 Btu/h... -
Page 8: Flow Rate
IKONIC Tankless Water Heater Service Manual GENERAL INFORMATION SPECIFICATIONS FLOW RATE RTGH S11i ( SR11i) TEMPERATURE RISE (°F) 11.2 Max Water Flow - GPM (gallons per minute) RTGH S10i ( SR10i) TEMPERATURE RISE (°F) 10.1 Max Water Flow - GPM (gallons per minute) RTGH S84i (SR84i) TEMPERATURE RISE (°F) Max Water Flow - GPM (gallons per minute) -
Page 9: Pressure Drop And Temperature Rise Curve
IKONIC Tankless Water Heater Service Manual GENERAL INFORMATION Pressure Drop Curve IKONIC PRESSURE DROP 199k Btu/h 180k Btu/h 157k Btu/h NOTE: Pressure drop curve for IKONIC is different from existing condensing model. See table below for IKONIC Pressure Drop information. Pressure Drop Curve 199k Btu/h 180k Btu/h... -
Page 10: Direct-Vent Gas Components
IKONIC Tankless Water Heater Service Manual GENERAL INFORMATION DIRECT-VENT GAS COMPONENTS Ref # Description Control Board Gas Valve Blower Assembly Venturi Gas Inlet Connector Water Control Valve Water Inlet Connector Inlet Water Filter Hot Outlet Connector Display Assembly "Non- WiFi" Display Assembly "WiFi"... -
Page 11: Direct-Vent Gas Components Recirculation Model
IKONIC Tankless Water Heater Service Manual GENERAL INFORMATION DIRECT-VENT GAS COMPONENTS RECIRCULATION MODEL Ref # Description Condensate Trap Water Outlet Pipe Control Board Air Intake Connector Water Outlet Elbow Gas Valve Flue Connector Recirculation Pump Inlet Pipe Blower Assembly Front Cover Recirculation Pump Venturi Gas Orifice Block... -
Page 12: Specifications And Installation Guidelines
IKONIC Tankless Water Heater Service Manual GENERAL INFORMATION SPECIFICATIONS AND INSTALLATION GUIDELINES TOP VIEW FRONT VIEW " Air Intake Exhaust Vent (116 mm) " (899 mm) " (440 mm) " (170 mm) " (116 mm) " (899 mm) " " (760 mm) (726 mm) 5"... - Page 13 IKONIC Tankless Water Heater Service Manual GENERAL INFORMATION SPECIFICATIONS AND INSTALLATION GUIDELINES VENTING FOR WATER HEATER The vent exhaust and air intake shall terminate outside The fittings other than the VENT TERMINAL should be as described in these instructions for direct vent applica- equivalent to the following: tion.
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Page 14: Gas / Condensation
IKONIC Tankless Water Heater Service Manual GENERAL INFORMATION Proper gas size is imperative, as this unit may be able to get sufficient gas but other appliances on the same gas " line may not. Alternatively, other appliances may cause (440 mm) insufficient gas to the unit if the gas line is undersized. -
Page 15: Control Board Connectors
IKONIC Tankless Water Heater Service Manual GENERAL INFORMATION CONTROL BOARD CONNECTORS *** GAS CHIP*** When replacing Control Board, you must use the original chip on the new Control Board. New Control Board must be programmed. CONNECTOR# MOLEX COLOR WIRE COLOR White White, Black, White, Black Blue... -
Page 16: Diagnostic Points On Control Board
IKONIC Tankless Water Heater Service Manual GENERAL INFORMATION DIAGNOSTIC POINTS ON CONTROL BOARD CONNECTION # WIRE COLOR NORMAL VALUE WHAT ARE YOU CHECKING? Do you have power to the control W1-BK2 AC 108 - 132 V board? W3-BK4 AC 108 - 132 V Do you have power to the pump? GY1-GY4 AC 108 - 132 V... - Page 17 IKONIC Tankless Water Heater Service Manual GENERAL INFORMATION DIAGNOSTIC POINTS ON CONTROL BOARD CONNECTION # WIRE COLOR NORMAL VALUE WHAT ARE YOU CHECKING? W6 - BL4 DC 144 - 192 V Does the fan motor have the proper voltage? DC 4 - 10 V Y1 - BL4 Is the fan motor producing regular pulse? (Pulse)
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Page 18: User Interface And Options
IKONIC Tankless Water Heater Service Manual USER INTERFACE AND OPTIONS QUICK LOOK MODE Press and hold the “STATUS” Button for 5 seconds to access Quick Look Mode. Water Inlet Temperature, Wa- ter Outlet Temperature and Flow Rate values will be dis- played on the screen sequentially. -
Page 19: Lcd On User Interface / Setting To Enable And Disable
IKONIC Tankless Water Heater Service Manual USER INTERFACE AND OPTIONS LCD ON THE USER INTERFACE This Tankless water Heater has the Liquid Crystal Display (LCD) on the user interface. This user interface allows you to adjust the water tem- perature and view the operating status or error codes. Blower On Cloud Connectivity Recirculation On... -
Page 20: Status Menu
IKONIC Tankless Water Heater Service Manual USER INTERFACE AND OPTIONS STATUS MENU This tankless water heater can show the operating status with the LCD on the User Interface. STATUS TANKLESS STATUS WIFI STATUS Current water heater Current WiFi mode of mode of operating operating TANKLESS STATUS... -
Page 21: Wifi Setting / Wifi Setup
IKONIC Tankless Water Heater Service Manual USER INTERFACE AND OPTIONS WIFI STATUS 3. Press the “▲” or “▼” button to navigate through the 2. To set up the WiFi connection, press “ENTER.” The menu items. The status menu items are below: WiFi signal is broadcasted for 30 minutes and the user should download and use the EcoNET Applica- tion, available on Android and iPhone, to continue the... -
Page 22: Settings Menu
BACK ENTER BACK ENTER BACK ENTER BACK ENTER BACK ENTER BACK ENTER SETTINGS STATUS SERVICE MODE SETTINGS STATUS SERVICE MODE SETTINGS STATUS SERVICE MODE ETTINGS STATUS SERVICE MODE SETTINGS STATUS SERVICE MODE SETTINGS STATUS SERVICE MODE IKONIC Tankless Water Heater Service Manual USER INTERFACE AND OPTIONS 3. -
Page 23: Set Point Temperature
IKONIC Tankless Water Heater Service Manual SET POINT SET POINT BACK ENTER BACK ENTER SETTINGS STATUS SERVICE MODE SETTINGS STATUS SERVICE MODE USER INTERFACE AND OPTIONS SET POINT TEMPERATURE 1. Press the “SETTINGS” button. 3. Now press the “▼” or “▲” button in the center of the display to increase or decrease the temperature. -
Page 24: Temperature Display / Beep On Alarm
SETTINGS STATUS SERVICE MODE SETTINGS STATUS SERVICE MODE SETTINGS STATUS SERVICE MODE SETTINGS STATUS SERVICE MODE IKONIC Tankless Water Heater Service Manual USER INTERFACE AND OPTIONS TEMPERATURE DISPLAY BEEP ON ALARM 1. Press the “SETTINGS” button. 1. Press the “SETTINGS” button. None SET POINT SET POINT... -
Page 25: Tankless Configuration
SET POINT BACK ENTER SETTINGS STATUS SERVICE MODE IKONIC Tankless Water Heater Service Manual USER INTERFACE AND OPTIONS TANKLESS CONFIGURATION 4. The Factory setting is “None”. Press the “▼” or “▲” nfig Recirc.Pump Mode button to select “Timer Perf” or “Timer E Saver” and ENTER BACK ENTER... -
Page 26: Recirculation - On Demand Mode
“BACK” button to return to the Home screen. Redo from step 1. One of the following accessories are needed to use the On Demand recirculation activation. RHEEM PART DESCRIPTION NUMBER SP20862 Motion Sensor Kit Tankless Config Recirc.Pump Mode... -
Page 27: Recirculation - Manual Recirculation Pump Operation
IKONIC Tankless Water Heater Service Manual onfig Recirc.Pump Mode ENTER BACK ENTER MODE USER INTERFACE AND OPTIONS SETTINGS STATUS SERVICE MODE MANUAL RECIRCULATION 4. The Factory setting is “Disabled”. Press the “▼” or “▲” button until “Enable” is displayed and press the PUMP OPERATION (FOR ON “Enter”... -
Page 28: High Altitude Adjustment
IKONIC Tankless Water Heater Service Manual USER INTERFACE AND OPTIONS SET POINT Tankless Config Recirc.Pump Mode BACK ENTER BACK ENTER BACK ENTER SETTINGS STATUS SERVICE MODE SETTINGS STATUS SERVICE MODE SETTINGS STATUS SERVICE MODE MANUALLY OPERATE 3. Press the “▼” or “▲” button until “Recirc. Pump Modes”... -
Page 29: Water Saving Control
Tankless Config ALTITUDE BACK ENTER BACK ENTER SETTINGS STATUS SERVICE MODE SETTINGS STATUS SERVICE MODE IKONIC Tankless Water Heater Service Manual USER INTERFACE AND OPTIONS 4. The factory setting is “Sea Level” Press the “▼” or 3. Press the “▼” or “▲” button until “Water Saver Mode” “▲”... -
Page 30: Network Instance
IKONIC Tankless Water Heater Service Manual USER INTERFACE AND OPTIONS NETWORK INSTANCE 2. Press the “▼” or “▲” button until “Tankless Config” is displayed, and press “ENTER” to confirm. 1. Press the “SETTINGS” button. Tankless Config Recirc.Pump Mode BACK ENTER BACK ENTER SETTINGS... -
Page 31: Service Menu
IKONIC Tankless Water Heater Service Manual USER INTERFACE AND OPTIONS SERVICE MENU This tankless water heater can set several operations and display all service information of this water heater with the Liquid Crystal Display (LCD) on the User Interface. SERVICE TOTAL PUMP HOURS: MAX INPUT RATE: CURRENT ALARMS:... -
Page 32: Burner Staging
IKONIC Tankless Water Heater Service Manual USER INTERFACE AND OPTIONS BURNER STAGING When converting this tankless water heater from one gas 3. Press the “SERVICE” button. Press the “▼” or “▲” type to the other or replacing the gas-air ratio valve, you button until “Burner Staging”... -
Page 33: Viewing Current Alarms / Clearing Current Alarms / Alarm History
SET POINT BACK ENTER SETTINGS STATUS SERVICE MODE IKONIC Tankless Water Heater Service Manual USER INTERFACE AND OPTIONS VIEWING CURRENT ALARMS 2. Press the “▼” or “▲” button until “Yes” is displayed, and press the “ENTER” To exit this setting, press “BACK”... - Page 34 IKONIC Tankless Water Heater Service Manual USER INTERFACE AND OPTIONS CLEARING ALARM HISTORY MANIFOLD ROTATE 1. Redo from above step.2, and press the “▼” or “▲” This tankless water heater can be set to rotate the “Man- button until “Clear History?” is displayed, and press ager”...
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Page 35: Reset Default Settings / Service Alerts
IKONIC Tankless Water Heater Service Manual USER INTERFACE AND OPTIONS RESET DEFAULT SETTINGS SERVICE ALERTS This tankless water heater can be reset to the default Service alerts remind users of water heater maintenance settings of the water heater by completing the following activities such as flushing the heat exchanger or replac- steps: (This will not affect accumulated values) ing the water treatment filter (if applicable) in order to... -
Page 36: Reset Wifi Settings
SET POINT WiFi Status ENTER BACK ENTER BACK ENTER RVICE MODE SETTINGS STATUS SERVICE MODE SETTINGS STATUS SERVICE MODE IKONIC Tankless Water Heater Service Manual WiFi Setup? SET POINT WiFi Status USER INTERFACE AND OPTIONS BACK ENTER BACK ENTER BACK ENTER ETTINGS STATUS... -
Page 37: Error Code Diagnostics
IKONIC Tankless Water Heater Service Manual ERROR CODE DIAGNOSTICS 2.1 NO ERROR CODE AND NO HOT WATER EXPLANATION FINAL CHECK: Water flow sensor in water volume con- trol valve. No hot water is delivered when water is flowing through unit and with LCD displaying the hot water temperature Check the voltage between #10 wire (Red) and #8 wire setting. -
Page 38: Error A011
IKONIC Tankless Water Heater Service Manual ERROR CODE DIAGNOSTICS ERROR A011 EXPLANATION Check Method Flame Not Detected From Flame Rod. Gas supply pressure In the case of ignition failure, the water heater will at- 1. Check the gas supply pressure and regulator at the tempt ignition 10 times (Including the post purge every gas connection of the water heater. - Page 39 IKONIC Tankless Water Heater Service Manual ERROR CODE DIAGNOSTICS ERROR A011 Air Filter Turn Power OFF Check with the air filter at the inlet air connection of the water heater that airflow is not blocked. If the air filter is Remove &...
- Page 40 Status”, and press “ENTER”. rod/igniter rod, you must replace the gasket with the Rheem approved gasket (a spare gasket is provided Use the “▼” or “▲” to “Flame Rod Status” while the unit with the unit). Improper sealing of the flame rod/igniter is operating.
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Page 41: Error A012
IKONIC Tankless Water Heater Service Manual ERROR CODE DIAGNOSTICS ERROR A012 EXPLANATION Gas filter Unit Detected Flame and Lost It. Check the gas filter at the gas connection of the water. Ensure the filter is not blocked by some foreign sub- If the water heater detects loss of flame during combus- stance. - Page 42 Refer to section “Venting for direct vent water heater” in rod/igniter rod, you must replace the gasket with the this manual and refer to U&C manual for installation in- Rheem approved gasket (a spare gasket is provided structions. with the unit). Improper sealing of the flame rod/igniter rod due to a damaged or missing gasket can cause unsafe operation or damage the OHL.
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Page 43: Error A014
“A014” error code on the User Interface. Rheem approved gasket (a spare gasket is provided This is normally cause by inadequate/wrong GAS SUP- with the unit). Improper sealing of the flame rod/igniter PLY and/or VENTING. -
Page 44: Error A018
NOTE: Flushing instructions utilize a submersible utility pump. Lime build-up inside the heat exchanger (Provided with the Rheem/Ruud Tankless Flush Kit - To prevent permanent damage to the unit, the unit must RTG20124) be drained and flushed. Flushing procedure may need to be repeated for excessive lime and scale build up. -
Page 45: Error A029
IKONIC Tankless Water Heater Service Manual ERROR CODE DIAGNOSTICS ERROR A029 EXPLANATION Condensate blockage Diagnostic check items This water heater has a built in condensate trap. If the • External condensate trap. electrode on the condensate trap detects the water level •... -
Page 46: Error A031
IKONIC Tankless Water Heater Service Manual ERROR CODE DIAGNOSTICS ERROR A031 EXPLANATION Diagnostic Check Inlet Thermistor Malfunction. Inlet Thermistor. Turn Power OFF Remove control board bracket to access inlet thermistor Molex. Locate & separate WHITE Molex Measure resistance across black wires on female end of Molex Clean scale build-up on inlet thermistor, The resistance is... -
Page 47: Error A032
IKONIC Tankless Water Heater Service Manual ERROR CODE DIAGNOSTICS ERROR A032 EXPLANATION Diagnostic Check Heat Exchanger Thermistor Malfunction. Heat Exchanger Thermistor. Turn Power OFF Remove control board bracket to access inlet thermistor Molex near blower motor. (How to Remove: Section 1). Locate &... -
Page 48: Error A033
IKONIC Tankless Water Heater Service Manual ERROR CODE DIAGNOSTICS ERROR A033 EXPLANATION Diagnostic Check Outlet Thermistor Malfunction. Outlet Thermistor. Turn Power OFF Remove control board bracket to access inlet thermistor Molex. Locate & separate BLACK Molex (located near blower motor). Check resistance across Black wires on female end of Molex. -
Page 49: Error A035
IKONIC Tankless Water Heater Service Manual ERROR CODE DIAGNOSTICS ERROR A035 EXPLANATION Diagnostic Check Improper thermistor connection • Inlet thermistor This tankless water heater has three thermistors (Inlet, • Outlet thermistor Outlet and Heat exchanger thermistor) • Heat exchanger thermistor If one or more possibly has a poor connection or not con- •... -
Page 50: Error A036
IKONIC Tankless Water Heater Service Manual ERROR CODE DIAGNOSTICS ERROR A036 EXPLANATION Diagnostic Check Exhaust Thermistor Malfunction. Exhaust Thermistor. Turn Power OFF Remove control board bracket to access inlet thermistor Molex. Locate & separate RED Molex. Check resis- tance across White wires on female end of Molex. -
Page 51: Error A055
IKONIC Tankless Water Heater Service Manual ERROR CODE DIAGNOSTICS ERROR A055 EXPLANATION Gas motor failed. Diagnostic check items The venturi in this water heater has a butterfly valve to • Gas control motor on the Venturi assembly control air volume. The motor adjusts the position of this butterfly valve. -
Page 52: Error A061
IKONIC Tankless Water Heater Service Manual ERROR CODE DIAGNOSTICS ERROR A061 EXPLANATION This water heater checks the RPM signal after the fan Diagnostic check items starts to run. • Blower motor If the RPM signal is incorrect after the fan to starts, the water heater displays the “A061”... -
Page 53: Error A063
IKONIC Tankless Water Heater Service Manual ERROR CODE DIAGNOSTICS ERROR A063 EXPLANATION Pump abnormality Diagnostic check If the water flow sensor does not detect water flow when • Recirculation Pump (Internal or external). the recirculation pump is working, the water heater dis- plays the “A063”... -
Page 54: Error A065
IKONIC Tankless Water Heater Service Manual ERROR CODE DIAGNOSTICS ERROR A065 EXPLANATION Water volume control valve malfunction Diagnostic check items The water volume control valve will only activate IF de- • Water volume control valve. mand for hot water EXCEEDS the unit’s limitations. If water flow is within the unit’s limitations, you will not get a voltage reading for diagnostics. -
Page 55: Error A066
IKONIC Tankless Water Heater Service Manual ERROR CODE DIAGNOSTICS ERROR A066 EXPLANATION Water bypass control valve malfunction Diagnostic check items If the bypass valve motor does not work properly, the • Water Bypass control valve. water heater displays the “A066” error code on the User Interface. -
Page 56: Error A070
IKONIC Tankless Water Heater Service Manual ERROR CODE DIAGNOSTICS ERROR A070 EXPLANATION Diagnostic check items Microcomputer Abnormality. • Control board If the microcomputer on the control board is not working properly, the water heater displays the “A070” error code on the User Interface. Turn Power OFF Turn power ON and operate unit. -
Page 57: Error A071
WARNING: When cleaning or replacing the >5 seconds? flame rod/igniter rod, you must replace the gasket with the Rheem approved gasket (a spare gasket is provided with the unit). Im- proper sealing of the flame rod/igniter rod due Replace control board to a damaged or missing gasket can cause unsafe operation or damage the OHL. -
Page 58: Error A072
WARNING: When cleaning or replacing the flame rod/igniter rod, you must replace the gasket with the Rheem approved gasket (a spare gasket is provided with the unit). Improper sealing of the flame rod/ igniter rod due to a damaged or missing gasket can... -
Page 59: Error A082
IKONIC Tankless Water Heater Service Manual ERROR CODE DIAGNOSTICS ERROR A082 EXPLANATION Turn Power OFF Installed Chip Error This tankless water heater has a gas chip Confirm that the correct gas chip is installed. on the control board. If the gas chip has a poor connection or the data that gas chip has is inadequate/wrong, the water heater displays the “A082”... -
Page 60: Error A090
IKONIC Tankless Water Heater Service Manual ERROR CODE DIAGNOSTICS ERROR A090 EXPLANATION Gas supply pressure Detected Blockage in Venting 1. Check the gas supply pressure at the gas connection of the water heater. If the water heater detects a blockage in the venting, the water heater displays the “A090”... -
Page 61: Error A200
IKONIC Tankless Water Heater Service Manual ERROR CODE DIAGNOSTICS ERROR A200 EXPLANATION Water Heater Communication Failure. User Interface is not communicating with control board. Diagnostic check items • User interface. Turn Power OFF Remove and reinsert connector "E" and the molex connected to user interface. -
Page 62: Error A2
IKONIC Tankless Water Heater Service Manual ERROR CODE DIAGNOSTICS ERROR 2## A2## ERROR CODE WATER HEATER COMM. FAILURE INSTANCE ## (## IS NO.02 TO NO,20) EXPLANATION DIAGNOSTIC CHECK ITEMS This water heater can manifold up to 20 units. In this •... -
Page 63: Error T110
IKONIC Tankless Water Heater Service Manual ERROR CODE DIAGNOSTICS ERROR T110 EXPLANATION WiFi chip communication error If the WiFi chip is not communicating with the user inter- face, the water heater displays the “T110” error code on the user interface. Diagnostic check items •... -
Page 64: Notification T111
“T111” error code on the user interface. NOTE: Flushing instructions utilize a submersible utility pump. (Provided with the Rheem/Ruud Tankless Flush This is a warning code and the unit will eventually shut kit RTG20124). After flush procedure has been done, down to protect unit. -
Page 65: Notification T113
IKONIC Tankless Water Heater Service Manual ERROR CODE DIAGNOSTICS NOTIFICATION T113 EXPLANATION Check method The water heater is detecting that the flow rate is less 1. Your water lines might be crossed. Make sure your than 0.4 GPM, and the heater will not activate. The water hot and cold water supply lines are connected to the heater displays the “T113”... -
Page 66: Notification T115 And Error T116
IKONIC Tankless Water Heater Service Manual ERROR CODE DIAGNOSTICS NOTIFICATION T115 AND ERROR T116 T115 EXPLANATION T116 EXPLANATION Pump schedule disable - No time received. Manifold unit fault. If the user interface does not receive the scheduled time If the water heaters are installed in a manifold and some to operate the pump when a schedule has been set (if in- units in the manifold cannot communicate to the man- stalled with a recirculation line) the water heater displays... -
Page 67: How To Remove Components
IKONIC Tankless Water Heater Service Manual HOW TO REMOVE COMPONENTS FRONT AND PLASTIC SCREW COVER The plastic screw covers are located on the top and bottom of the front cover. Gently press and release these parts indicated by the arrows below. REMOVE FRONT COVER The front cover is tightened by 4 screws. -
Page 68: Gas-Air Ratio Valve
IKONIC Tankless Water Heater Service Manual HOW TO REMOVE COMPONENTS GAS-AIR RATIO VALVE 1. Remove 3 screws connected to gas orifice block and 2. Remove quick fastener connected to the gas-air ratio 2 screws connected to gas-air ratio valve bracket. valve and gas pipe. -
Page 69: Flame And Igniter Rod
IKONIC Tankless Water Heater Service Manual HOW TO REMOVE COMPONENTS FLAME AND IGNITER ROD 1. Remove the hook film part of the Over Heat Limiter NOTE: When reassembling flame and igniter rods, (OHL ). DO NOT cut the film. please use a spare gasket if the condition of the gasket is not good. -
Page 70: Flame And Igniter Rod Gasket
IKONIC Tankless Water Heater Service Manual HOW TO REMOVE COMPONENTS FLAME AND IGNITER ROD GASKET 1. Remove the hook film part of the Over Heat Limiter 3. Remove 3 screws from flame and igniter rod bracket, (OHL ). DO NOT cut the film. and pull the flame and igniter rods 4. -
Page 71: Water Inlet Connection
IKONIC Tankless Water Heater Service Manual HOW TO REMOVE COMPONENTS WATER INLET CONNECTION NOTE: Before removing water inlet connection, turn off water to the water heater by closing the shut off valve and drain the heater. 1. Remove 3 screws from the bottom plate, as pictured 3. -
Page 72: Water Control Valve And Water Bypass Valve
IKONIC Tankless Water Heater Service Manual HOW TO REMOVE COMPONENTS WATER CONTROL VALVE/WATER BYPASS VALVE NOTE: Before removing water control valve, turn off wa- 4. Remove quick fastener connected to check valve. ter to the water heater by closing the shut off valve and drain the heater. -
Page 73: Condensation Trap / Outlet Thermistor
IKONIC Tankless Water Heater Service Manual HOW TO REMOVE COMPONENTS CONDENSATE TRAP 5. Tilt the condensate trap to the right and remove it. 1. Remove control board and display. NOTE: To remove the control board and display, refer to section “Control Board” and section “Display.” 2. -
Page 74: Igniter Coil
IKONIC Tankless Water Heater Service Manual HOW TO REMOVE COMPONENTS IGNITER COIL 1. Remove the hook film part of the Over Heat Limiter 5. Remove the screw (pictured below) from the igniter (OHL). bracket. White Molex Connector Screw 2. Remove Igniter rod cover. 3. -
Page 75: Blower
IKONIC Tankless Water Heater Service Manual HOW TO REMOVE COMPONENTS BLOWER 1. Remove fan control wiring harness (Connector “D”) NOTE: After removing the gas orifice block, secure four and gas control motor harness (Connecto “J”) from (4) gaskets in a safe location to avoid loss. the control board. -
Page 76: Display
IKONIC Tankless Water Heater Service Manual HOW TO REMOVE COMPONENTS 3.12 BLOWER CONT'D 7. Remove three screws and Venturi assembly. 3.13 DISPLAY ONLY 1. Remove top center screw from the display mounting 2. Remove connector connected to display. (Located at bracket, and the screw located at the bottom of the left side of display). -
Page 77: Control Board
IKONIC Tankless Water Heater Service Manual HOW TO REMOVE COMPONENTS DISPLAY WITH DISPLAY MOUNTING BRACKET 1. Remove two screws located at the bottom of the unit. 2. Remove the connector “E” from the control board and from the display (located left side of display). CONTROL BOARD ONLY 1. -
Page 78: Power Cord
IKONIC Tankless Water Heater Service Manual HOW TO REMOVE COMPONENTS CONTROL BOARD BRACKET POWER CORD 1. Remove all 9 connectors from the control board. 1. Locate YELLOW Molex connector attached to power cord. 2. Remove top center screw from control boardmount- 2. -
Page 79: Thermistor Wiring Harness
IKONIC Tankless Water Heater Service Manual HOW TO REMOVE COMPONENTS THERMISTOR WIRING HARNESS 1. Remove connector “I” from control board. 4. Remove BLACK Molex connector connected to outlet thermistor and YELLOW Molex connector connected 2. Remove display, and control board with bracket from to heat exchanger thermistor. -
Page 80: Gas Control Wiring Harness
IKONIC Tankless Water Heater Service Manual HOW TO REMOVE COMPONENTS THERMISTOR WIRING HARNESS GAS CONTROL WIRING HARNESS NOTE: Before removing outlet thermistor, turn off water 1. Remove fan control wiring harness (Connector “D”) to the water heater by closing the shut-off valve and and gas control motor harness (Connecto "J") from drain the heater. -
Page 81: Fan Control Wiring Harness High Voltage Ground Wiring
IKONIC Tankless Water Heater Service Manual HOW TO REMOVE COMPONENTS FAN CONTROL WIRING HARNESS HIGH VOLTAGE GROUND WIRING 1. Remove two the molex connectors from the control 1. Remove the screw on the bracket and the cable on board (connector "D") and from the blower motor. the LEFT. -
Page 82: Power Control Wiring Harness
IKONIC Tankless Water Heater Service Manual HOW TO REMOVE COMPONENTS POWER CONTROL WIRING HARNESS 1. Remove total of three (3) screws; one (1) screw on 3. Shift the control board and locate total of four (4) the bracket on top, and two (2) screws below to de- Molex connectors;... -
Page 83: Display Control Wiring Harness
IKONIC Tankless Water Heater Service Manual HOW TO REMOVE COMPONENTS DISPLAY CONTROL WIRING HARNESS 1. Remove the WHITE connector on the left side of the display. 2. Remove the connector E. -
Page 84: Orifice Plate
IKONIC Tankless Water Heater Service Manual HOW TO REMOVE COMPONENTS ORIFICE PLATE (NAT/LP) 1. Locate the solenoid valve shown in figure below NOTE: Arrows on the front plate of the gas orifice block and remove the connector with BLACK and YELLOW shows the screws that need to be removed. - Page 85 IKONIC Tankless Water Heater Service Manual HOW TO REMOVE COMPONENTS ORIFICE PLATE (NAT/LP) 8. Place two (2) gaskets on the LP (or NAT) orifice plate. 9. Install the LP (or NAT) orifice plate on to the gas ori- fice block, for use with LP (or NAT) gas. NOTE: To ensure a leak free joint, verify that both gaskets on the gas orifice block are in place and are in good condition, before attaching the LP (or NAT) orifice...
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Page 86: How To Connect
IKONIC Tankless Water Heater Service Manual HOW TO CONNECT CONNECTING TO WIFI 1. Scan the QR Code located on the side of the heater to 4. Select “Add Product on the Home screen. download the EcoNet application. 2. Follow directions in “WiFi Setting”. NOTE: WiFi Setup begins on initial power up. - Page 87 6. If using current location, select “ALLOW” when 8. Go to the WiFi settings on your phone, and connect to prompted to allow Rheem EcoNet to access your lo- the EcoNet network for your device. cation while you are using the application.
- Page 88 IKONIC Tankless Water Heater Service Manual HOW TO CONNECT CONNECTING TO WIFI 10. Once connected, the user may fill in the preferences, customizations, and contractor information. 11. Go to Settings, select Account, then select Notifica- tion Settings to adjust preferences. 12.
- Page 89 IKONIC Tankless Water Heater Service Manual NOTES...
- Page 90 IKONIC Tankless Water Heater Service Manual NOTES...
- Page 91 IKONIC Tankless Water Heater Service Manual NOTES...
- Page 92 TECHNICAL SUPPORT LINE Phone: 800-432-8373 Fax: 334-260-1341 ORDER CENTER 1-800-621-5622 RHEEM WATER HEATERS 800 Instestate Park Dr. Montgomery, AL 36109 Website: www.Rheem.com e-mail: Techserv@Rheem.com...