Table of Contents
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TECHNICAL TRAINING AND
SERVICE MANUAL
TANKLESS
WATER HEATERS
SUPER HIGH EFFICIENCY (Condensing)
RTGH-S11i
RTGH-SR11i
RTGH-SPR11i
CRTGH-S11i
CRTGH-SR11i
CRTGH-SPR11i
RUTGH-S11i
RUTGH-SR11i
RUTGH-SPR11i
CRUTGH-S11i
RTGH-SC11i
RTGH-S10i
RTGH-SR10i
RTGH-SPR10i
CRTGH-S10i
CRTGH-SR10i
CRTGH-SPR10i
RUTGH-S10i
RUTGH-SR10i
RUTGH-SPR10i
CRUTGH-SR11i
RTGH-SCP11i
RTGH-S84i
RTGH-SR84i
RTGH-SPR84i
CRTGH-S84i
CRTGH-SR84i
CRTGH-SPR84i
RUTGH-S84i
RUTGH-SR84i
RUTGH-SPR84i
CRUTGH-SPR11i
AP23209
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Table of Contents
Related Manuals for Rheem Iconic RTGH-S11i
Summary of Contents for Rheem Iconic RTGH-S11i
- Page 1 TECHNICAL TRAINING AND SERVICE MANUAL G I N E E R I N G C E N T E R TANKLESS WATER HEATERS SUPER HIGH EFFICIENCY (Condensing) RTGH-S11i RTGH-S10i RTGH-S84i RTGH-SR11i RTGH-SR10i RTGH-SR84i RTGH-SPR11i RTGH-SPR10i RTGH-SPR84i CRTGH-S11i CRTGH-S10i CRTGH-S84i CRTGH-SR11i CRTGH-SR10i CRTGH-SR84i CRTGH-SPR11i...
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Page 2: Table Of Contents
CLEARING THE CURRENT ALARMS ........................31 RESET THE DEFAULT SETTINGS ........................32 RESET WIFI SETTING ............................33 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... - Page 3 IKONIC Tankless Water Heater Service Manual CONTENTS ERROR CODE DIAGNOSTICS ......................34 NO ERROR CODE AND NO HOT WATER / WATER FLOW SENSOR ..............34 ERROR CODE LIST ............................... 35 HOW TO REMOVE COMPONENTS ....................64 REMOVE FRONT COVER ............................. 64 GAS-AIR RATIO VALVE ............................65 FLAME ROD ................................
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Page 4: Safety And Introduction
IKONIC Tankless Water Heater Service Manual SAFETY AND INTRODUCTION FLAMMABLE LIQUIDS AND The purpose of this manual is to provide technical and troubleshooting information to technicians and service VAPORS professionals ONLY. Homeowners should consult the Use and Care Manual ( AP22745) for general informa- Gasoline, as well as other flammable material and liquids tional and installation inquiries or contact technical (adhesives, solvents, etc.), and their vapors are extremely... -
Page 5: Troubleshooting Tools
IKONIC Tankless Water Heater Service Manual TROUBLESHOOTING TOOLS SAFETY FIRST Your safety and safety of others is very impor- tant. This manual is only intended for qualified service technicians. ALWAYS USE CAUTION while testing voltages and/or gas supply. MULTI-METER MULTI-METER MANOMETER NEEDLE SET Used to measure... -
Page 6: General Information
IKONIC Tankless Water Heater Service Manual GENERAL INFORMATION GENERAL PRODUCT INFORMATION CROSSOVER VALVE The crossover valve (Grundfos RTG20285 ONLY) should be located at the farthest faucet and has a flow rate of approximately 1.0 GPM. See drawing below for infor- mation regarding crossover valve placement. -
Page 7: Pressure Drop And Temperature Rise Curve
IKONIC Tankless Water Heater Service Manual GENERAL INFORMATION Pressure Drop Curve ICONIC PRESSURE DROP 199k Btu/h 180k Btu/h 157k Btu/h NOTE: Pressure drop curve for Iconic is different from existing condensing model. See table below for Iconic Pressure Drop information. Pressure Drop Curve 199k Btu/h 180k Btu/h... -
Page 8: Gas / Condensation
IKONIC Tankless Water Heater Service Manual GENERAL INFORMATION " (440 mm) Proper gas size is imperative, as this unit may be able to get sufficient gas but other appliances on the same " gas line will not. This could cause issues throughout (170 mm) "... -
Page 9: Specifications
IKONIC Tankless Water Heater Service Manual GENERAL INFORMATION 1.1.1 SPECIFICATIONS RTGH-S11I RTGH-S10I RTGH-S84I SPECIFICATION RTGH-SR11I RTGH-SR10I RTGH-SR84I RTGH-SPR11I RTGH-SPR10I RTGH-SPR84I Width 17.3 in (440 mm) Dimensions Height 28.6 in (726 mm) Depth 13.7 in (348 mm) Approval Gas Type Batural (NG) and Liquid Propane (LP) Maximum Gas Consumption 199,900 Btu/h 180,000 Btu/h... -
Page 10: Specification And Installation Guidelines
IKONIC Tankless Water Heater Service Manual GENERAL INFORMATION SPECIFICATIONS OF THE ICONIC AND INSTALLATION GUIDELINES TOP VIEW FRONT VIEW " Air Intake Exhaust Vent (116 mm) " (899 mm) " (440 mm) " (170 mm) " (116 mm) " (899 mm) "... - Page 11 IKONIC Tankless Water Heater Service Manual GENERAL INFORMATION SPECIFICATIONS OF THE ICONIC AND INSTALLATION GUIDELINES 1.1.2 VENTING FOR DIRECT VENT WATER HEATER The vent exhaust and air intake must be vented outside The fittings other than the VENT TERMINAL should be as described in the use and care manual.
- Page 12 IKONIC Tankless Water Heater Service Manual GENERAL INFORMATION SPECIFICATIONS OF THE ICONIC AND INSTALLATION GUIDELINES 1.1.3 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 S10i ( SR10i)
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Page 13: Control Board Connectors
IKONIC Tankless Water Heater Service Manual GENERAL INFORMATION 1.2 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 pro- grammed. CONNECTOR# MOLEX COLOR WIRE COLOR White White, Black, White, Black... -
Page 14: Diagnostic Points On Control Board
IKONIC Tankless Water Heater Service Manual GENERAL INFORMATION 1.3 DIAGNOSTIC POINTS ON CONTROL BOARD WIRING DIAGRAM COLOR CODE CODE COULEUR REMOTE RECIRC EXT1 SCHÉMA DE CÂBLAGE RED, ROUGE FAN MOTOR CTRL RECIRC.1 WHITE, BLANC VENTILATEUR DU MOTEUR BROWN, MARRON BLACK, NOIR Y W G BLUE, BLEU GRAY, GRIS... - Page 15 IKONIC Tankless Water Heater Service Manual GENERAL INFORMATION 1.3 DIAGNOSTIC POINTS ON CONTROL BOARD CONNECTION # WIRE COLOR NORMAL VALUE WHAT ARE YOU CHECKING? W6 - BL4 DC144 - 192 V Does the fan motor have the proper voltage? DC4 - 10 V Y1 - BL4 Is the fan motor producing regular pulse? (Pulse)
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Page 16: Lcd On The User Interface / Setting To Enable And Disable
IKONIC Tankless Water Heater Service Manual GENERAL INFORMATION 1.4 LCD ON THE USER INTERFACE This Tankless water Heater has the Liquid Crystal Dis- play (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 17: Setting Operation Mode
IKONIC Tankless Water Heater Service Manual GENERAL INFORMATION 1.4.2 SETTING OPERATION MODE This tankless water heater can set the operation mode with the Liquid Crystal Display (LCD) on the User Inter- face. 1. Display needs to be unlocked before the settings can be changed. -
Page 18: Status Menu Items Description / Tankless Status
IKONIC Tankless Water Heater Service Manual GENERAL INFORMATION 1.5 STATUS MENU ITEMS DESCRIPTION This tankless water heater can show the operating sta- tus with the LCD on the User Interface. STATUS TANKLESS STATUS WIFI STATUS Current water heater Current WiFi mode of mode of operating operating 1.5.1 TANKLESS STATUS... -
Page 19: Wifi Status / Wifi Setting
IKONIC Tankless Water Heater Service Manual GENERAL INFORMATION 1.5.2 WIFI STATUS 3. Press the “▲” or “▼” button to navigate through 2. To set up the WiFi connection, press “ENTER.” The 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 Appli- cation, available on Android and iPhone, to contin-... -
Page 20: Setting Menu Items Description
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 GENERAL INFORMATION 3. - Page 21 IKONIC Tankless Water Heater Service Manual SET POINT SET POINT BACK ENTER BACK ENTER SETTINGS STATUS SERVICE MODE SETTINGS STATUS SERVICE MODE GENERAL INFORMATION 1.6.1 SETTING THE SET POINT TEMPERATURE 3. Now press the “ ▼ ” or “ ▲ ” button in the center 1.
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Page 22: Setting Temperature Display / Setting Beep On Alarm
SET POINT Recirc.Pump Modes Tankless Config Recirc.Pump Modes BACK ENTER BACK ENTER BACK ENTER BACK ENTER SETTINGS STATUS SERVICE MODE SETTINGS STATUS SERVICE MODE SETTINGS STATUS SERVICE MODE SETTINGS STATUS SERVICE MODE IKONIC Tankless Water Heater Service Manual GENERAL INFORMATION 1.6.2 SETTING THE 1.6.3 SETTING BEEP TEMPERATURE DISPLAY... -
Page 23: Network Instance / Tankless Configuration / Timer Mode
IKONIC Tankless Water Heater Service Manual GENERAL INFORMATION 1.6.4 NETWORK INSTANCE 1.6.5 TANKLESS CONFIGURATION 1. Press the “ SETTINGS ” button. SET POINT Tankless Config Recirc.Pump Modes BACK ENTER BACK ENTER BACK ENTER This section is applicable for pump built in models, SETTINGS STATUS SERVICE... -
Page 24: Recirculation Operation Timer Mode
SET POINT Tankless Config Recirc.Pump Modes BACK ENTER BACK ENTER BACK ENTER SETTINGS STATUS SERVICE MODE SETTINGS STATUS SERVICE MODE SETTINGS STATUS SERVICE MODE IKONIC Tankless Water Heater Service Manual GENERAL INFORMATION 1.6.5.1.2 ON DEMAND MODE 3. The Factory setting is “None”. Press the “▼” or “▲”... -
Page 25: Recirculation Operation On Demand / Schedule Mode
SETTINGS STATUS SERVICE MODE SETTINGS STATUS SERVICE MODE RHEEM PART DESCRIPTION NUMBER SP20862 Motion Sensor Kit 3. Press the “ ▼ ” or “ ▲ ” button until "Recirc. Pump SP20863 Wired Push Button Modes" is displayed, and press “ENTER” to con- firm. -
Page 26: Manual Operating Of Recirc. Pump (For Demand)
IKONIC Tankless Water Heater Service Manual GENERAL INFORMATION 2. Press the “ ▼ ” or “ ▲ ” button until "Tankless Con- 4. The Factory setting is "None.” Press the “▼” or “▲” button until “Schedule” is displayed, and press fig."... -
Page 27: Recirculation Operation Manually Operate Pump
Tankless Config BACK ENTER SETTINGS STATUS SERVICE MODE IKONIC Tankless Water Heater Service Manual GENERAL INFORMATION Recirc.Pump Modes NTER BACK ENTER RECIRCULATION OPERATION 4. The factory setting is “ Sea Level Press the “▼” MODE SETTINGS STATUS SERVICE MODE or “▲” button to select "Low Altitude", "Med. Al- MANUALLY OPERATE PUMP titude"... -
Page 28: Setting Manifold Heaters
IKONIC Tankless Water Heater Service Manual GENERAL INFORMATION 2. Press the “▼” or “▲” button until "Tankless Con- 1. Press the “SETTINGS” button. fig." is displayed, and press "ENTER" to confirm. None SET POINT Tankless Config Recirc.Pump Modes BACK ENTER BACK ENTER SETTINGS... -
Page 29: Service Menu Items Description
IKONIC Tankless Water Heater Service Manual GENERAL INFORMATION 1.7 SERVICE MENU ITEMS DESCRIPTION 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:... -
Page 30: Viewing Active Alarms
SET POINT BACK ENTER SETTINGS STATUS SERVICE MODE IKONIC Tankless Water Heater Service Manual GENERAL INFORMATION 1.7.1 VIEWING ACTIVE ALARMS 2. Press the “▼” or “▲” button until "Yes" is dis- played, and press the “ENTER” To exit this setting, press “BACK”... -
Page 31: Clearing The Current Alarms
IKONIC Tankless Water Heater Service Manual GENERAL INFORMATION CLEARING HISTORICAL 1.7.3 MANIFOLD ROTATE ALARMS This tankless water heater can be set to rotate the mas- ter unit in a manifold system by completing the follow- 1. Redo from above step.2, and press the “▼” or ing steps: “▲”... -
Page 32: Reset The Default Settings
IKONIC Tankless Water Heater Service Manual GENERAL INFORMATION 1.7.4 RESET THE DEFAULT 1.7.5 SETTING SERVICE ALERTS SETTINGS Service alerts remind users of water heater mainte- nance activities such as flushing the heat exchanger This tankless water heater can be reset to the default or replacing the water treatment filter (if applicable) in settings of the water heater by completing the follow- order to maximize the life of your tankless water heater. -
Page 33: Reset Wifi Setting
ENTER BACK ENTER BACK ENTER SERVICE MODE SETTINGS STATUS SERVICE MODE SETTINGS STATUS SERVICE MODE WiFi Setup? SET POINT WiFi Status IKONIC Tankless Water Heater Service Manual BACK ENTER BACK ENTER BACK ENTER SETTINGS STATUS SERVICE MODE SETTINGS STATUS SERVICE MODE SETTINGS STATUS... -
Page 34: Error Code Diagnostics
IKONIC Tankless Water Heater Service Manual ERROR CODE DIAGNOSTICS 2.1 NO ERROR CODE AND NO HOT WATER EXPLANATION WATER FLOW SENSOR No hot water is delivered when water is flowing through 1. Use cold water shutoff valve to turn OFF water sup- unit and with LCD displaying the hot water temperature ply to unit. -
Page 35: Error Code List
IKONIC Tankless Water Heater Service Manual ERROR CODE DIAGNOSTICS 2.2 ERROR CODE LIST A031 ERROR CODE Diagnostic Check Inlet Thermistor Malfunction. Inlet Thermistor. Turn Power OFF Remove connector "I". Measure resistance on connector "I" between #5 wire (Black) & #7 wire (White) Remove connector "I"... - Page 36 IKONIC Tankless Water Heater Service Manual ERROR CODE DIAGNOSTICS 2.2 ERROR CODE LIST A033 ERROR CODE Diagnostic Check Outlet Thermistor Malfunction. Outlet Thermistor. Turn Power OFF Remove connector "H". Measure resistance between #1 (Blue) & #11 wire (Yellow) Remove connector "R". Operate unit. The resistance is If Error Code A033 appears: Replace control 7K - 23K Ohms?
- Page 37 IKONIC Tankless Water Heater Service Manual ERROR CODE DIAGNOSTICS 2.2 ERROR CODE LIST A032 ERROR CODE Diagnostic Check Heat Exchanger Thermistor Malfunction. Heat Exchanger Thermistor. Turn Power OFF Remove connector "H". Measure resistance between #1 wire (Blue) & #11 wire (Yellow) Reinsert connector "R".
- Page 38 IKONIC Tankless Water Heater Service Manual ERROR CODE DIAGNOSTICS 2.2 ERROR CODE LIST 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 39 IKONIC Tankless Water Heater Service Manual ERROR CODE DIAGNOSTICS 2.2 ERROR CODE LIST A036 ERROR CODE Diagnostic Check Exhaust Thermistor Malfunction. Exhaust Thermistor. Turn Power OFF Remove connector "H". Measure resistance between #4 wire (Red) & #11 wire (Yellow) Reinsert connector "R". The resistance is Operate unit.
- Page 40 IKONIC Tankless Water Heater Service Manual ERROR CODE DIAGNOSTICS 2.2 ERROR CODE LIST A035 ERROR CODE Diagnostic Check Improper thermistor connection • Inlet thermistor This tankless water heater has three thermistors (Inlet, • Outlet thermistor Outlet and Heat exchanger thermistor) •...
- Page 41 IKONIC Tankless Water Heater Service Manual ERROR CODE DIAGNOSTICS 2.2 ERROR CODE LIST A014 ERROR CODE Diagnostic Check Over Heat Limiter (OHL) activated. • Over Heat Limiter (OHL) This tankless water heater has an Over Heat Limiter • Over Heat Limit fuse (OHLF) (OHL) and an Over Heat Limit Fuse (OHLF).
- Page 42 IKONIC Tankless Water Heater Service Manual ERROR CODE DIAGNOSTICS 2.2 ERROR CODE LIST A011 ERROR CODE 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 at the gas connec- tempt ignition 10 times (Including the post page every tion of the water heater.
- Page 43 IKONIC Tankless Water Heater Service Manual ERROR CODE DIAGNOSTICS 2.2 ERROR CODE LIST A011 ERROR CODE Turn Power OFF Flame Not Detected From Flame Rod. Air Filter Remove & reinsert white molex connec- tor on left of Igniter coil & black insulated Check with the air filter at the inlet air igniter cable on igniter rod.
- Page 44 IKONIC Tankless Water Heater Service Manual ERROR CODE DIAGNOSTICS 2.2 ERROR CODE LIST A011 ERROR CODE Flame Not Detected From Flame Rod. Turn Power OFF Flame rod (Flame is visible) If the spark is visible through the sight glass, refer to the flow chart on the left Remove connector "H"...
- Page 45 IKONIC Tankless Water Heater Service Manual ERROR CODE DIAGNOSTICS 2.2 ERROR CODE LIST A012 ERROR CODE Gas filter Unit Detected Flame and Lost It. Check with the gas filter at the gas connection of the water heater that filter is not closed by some foreign If the water heater detects loss of flame during combus- substance.
- Page 46 IKONIC Tankless Water Heater Service Manual ERROR CODE DIAGNOSTICS 2.2 ERROR CODE LIST A012 ERROR CODE Flame rod (Flame is visible) Unit Detected Flame and Lost It. Check the gas supply pressure at the gas connection of the water heater. Venting Check the condition of venting (Exp.
- Page 47 IKONIC Tankless Water Heater Service Manual ERROR CODE DIAGNOSTICS 2.2 ERROR CODE LIST A071 ERROR CODE Turn Power OFF Gas Air ratio valve malfunction. If the flame rod is detecting a flame for 8 Remove connector "C" and "H" terminal on flame rod, and reinsert them.
- Page 48 IKONIC Tankless Water Heater Service Manual ERROR CODE DIAGNOSTICS 2.2 ERROR CODE LIST A061 ERROR CODE Diagnostic check items This water heater checks the RPM signal after the fan stars to run. • Blower motor If the RPM signal is incorrect after the fan to run, the water heater displays the “A061 ”...
- Page 49 IKONIC Tankless Water Heater Service Manual ERROR CODE DIAGNOSTICS 2.2 ERROR CODE LIST A070 ERROR CODE Diagnostic check items Microcomputer Abnormality. • Control board If the microcomputer on the control board is not work- ing properly, the water heater displays the “A070” error code on the User Interface.
- Page 50 IKONIC Tankless Water Heater Service Manual ERROR CODE DIAGNOSTICS 2.2 ERROR CODE LIST A072 ERROR CODE Turn Power OFF Flame rod malfunction If the flame rod detects presence of Remove connector "H" and terminal on flame rod, and reinsert them. flame before ignitor is activated, the water heater displays the “...
- Page 51 IKONIC Tankless Water Heater Service Manual ERROR CODE DIAGNOSTICS 2.2 ERROR CODE LIST A082 ERROR CODE 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 52 IKONIC Tankless Water Heater Service Manual ERROR CODE DIAGNOSTICS 2.2 ERROR CODE LIST A090 ERROR CODE Gas supply pressure Detected Blockage in Venting 1. Check the gas supply pressure at the gas connec- tion of the water heater. If the water heater detects a blockage in the venting, the water heater displays the “A090”...
- Page 53 NOTE: Flushing instructions utilize a submers- ible utility pump. Lime build-up inside the heat exchanger (Provided with the Rheem/Ruud Tankless To prevent permanent damage to the unit, the unit must Flush Kit - RTG20124) be drained and floshed. Flushing procedure may need to be repeated for excessive lime and scale build up.
- Page 54 IKONIC Tankless Water Heater Service Manual ERROR CODE DIAGNOSTICS 2.2 ERROR CODE LIST A065 ERROR CODE Diagnostic check items Water volume control valve malfunction 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 IKONIC Tankless Water Heater Service Manual ERROR CODE DIAGNOSTICS 2.2 ERROR CODE LIST A066 ERROR CODE Diagnostic check items Water bypass control valve malfunction 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 IKONIC Tankless Water Heater Service Manual ERROR CODE DIAGNOSTICS 2.2 ERROR CODE LIST A055 ERROR CODE Diagnostic check items Gas motor failed. The venturi in this water heater has a butterfly valve • Gas control motor on the venture assembly to control air volume.
- Page 57 IKONIC Tankless Water Heater Service Manual ERROR CODE DIAGNOSTICS 2.2 ERROR CODE LIST A029 ERROR CODE Diagnostic check items Condensate blockage This water heater has a built in neutralizer. If the elec- • External neutralizer. trode on this neutralizer detects the water level is full •...
- Page 58 IKONIC Tankless Water Heater Service Manual ERROR CODE DIAGNOSTICS 2.2 ERROR CODE LIST A063 ERROR CODE Diagnostic check Pump abnormality If the water flow sensor does not detect water flow • Recirculation Pump (Internal or external). when the recirculation pump is working, the water heater displays the "A063 ”...
- Page 59 IKONIC Tankless Water Heater Service Manual ERROR CODE DIAGNOSTICS 2.2 ERROR CODE LIST A200 ERROR CODE Translator to 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 60 IKONIC Tankless Water Heater Service Manual ERROR CODE DIAGNOSTICS 2.2 ERROR CODE LIST T110 ERROR CODE WiFi chip communication error If the WiFi chip is not communicating with the user interface, the water heater displays the “ T110 ” error code on the user interface.
- Page 61 Crystal Display (LCD) on the user interface. mersible utility pump. (Provided with the This is a warning code and the unit will eventually shut Rheem/Ruud Tankless Flush kit RTG20124) down to protect unit. To set this service alert, refer to section 1.7.5 “Setting service alert”.
- Page 62 If this error code is displayed on the LCD, • Water filter please order the neutralizer kit through Rheem/ Rund supplier as soon as possible. Check method • The water filter and the hot & cold supply line may have a blockage.
- Page 63 IKONIC Tankless Water Heater Service Manual ERROR CODE DIAGNOSTICS 2.2 ERROR CODE LIST T115 ERROR CODE T116 ERROR CODE Pump schedule disable - No time received. Manifold unit fault. If the user interface does not receive the scheduled If the water heaters are installed in a manifold and time to operate the pump when a schedule has been some units in the manifold cannot communicate to the set (if installed with a recirculation line) t he water heater...
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Page 64: How To Remove Components
IKONIC Tankless Water Heater Service Manual HOW TO REMOVE COMPONENTS 3.1 FRONT AND PLASTIC SCREW COVER The plastic screw covers are located top and bottom on the front cover. Press and release these parts indicated by the arrows below. REMOVE FRONT COVER The front cover is tightened by 4 screws. -
Page 65: Gas-Air Ratio Valve
IKONIC Tankless Water Heater Service Manual HOW TO REMOVE COMPONENTS 3.2 GAS-AIR RATIO VALVE 1. Remove 3 screws connected to gas orifice block 2. Remove quick fastener connected gas-air ratio and 2 screws connected to gas-air ratio valve valve and gas connected pipe. bracket. -
Page 66: Flame Rod
IKONIC Tankless Water Heater Service Manual HOW TO REMOVE COMPONENTS 3.3 FLAME ROD NOTE: When reassembling flame rod, please 1. Remove the hook film part of the Over Heat Limiter (OHL ). DO NOT cut the film. use a spare gasket if the condition of the gas- ket is not good. -
Page 67: Gasket
IKONIC Tankless Water Heater Service Manual HOW TO REMOVE COMPONENTS 3.4 GASKET 1. Remove the hook film part of the Over Heat Limiter 3. Remove 3 screws from flame rod bracket, and pull (OHL ). DO NOT cut the film. the flame rod 4. -
Page 68: Water Inlet Connection 3/4
IKONIC Tankless Water Heater Service Manual HOW TO REMOVE COMPONENTS 3.5 WATER INLET CONNECTION ¾" NOTE: Before removing water inlet connection, turn off water to the water heater by closing the shut off valve. 1. Remove 3 screw from the bottom plate, as pictured 3. -
Page 69: Water Control Valve
IKONIC Tankless Water Heater Service Manual HOW TO REMOVE COMPONENTS 3.6 WATER CONTROL VALVE NOTE: Before removing water inlet connec- 4. Remove quick fastener connected to check valve. tion, turn off water to the water heater by closing the shut off valve. 1. -
Page 70: Bypass Valve
IKONIC Tankless Water Heater Service Manual HOW TO REMOVE COMPONENTS 3.7 BYPASS VALVE NOTE: : Before removing water inlet connec- 6. Remove fastener to check valve. tion, turn off water to the water heater by closing the shut off valve. 1. -
Page 71: Neutralizer / Outlet Thermistor
IKONIC Tankless Water Heater Service Manual HOW TO REMOVE COMPONENTS 3.8 NEUTRALIZER 3.9 OUTLET THERMISTOR NOTE: Before removing outlet thermistor, turn 1. Remove control board and display. off water to the water heater by closing the NOTE: To remove the control board and dis- shut off valve. -
Page 72: Igniter Coil / Igniter Rod
IKONIC Tankless Water Heater Service Manual HOW TO REMOVE COMPONENTS 3.10 IGNITER COIL 3.11 IGNITER ROD 1. Remove the hook film part of the Over Heat Limiter 1. Remove the hook film part of the Over Heat Limiter (OHL). (OHL). NOTE: DO NOT cut the film. -
Page 73: Blower
IKONIC Tankless Water Heater Service Manual HOW TO REMOVE COMPONENTS 3.12 BLOWER NOTE: After removing the gas orifice block, 1. Remove fan control wiring harness from control board (Connector “D”) and wire holder from the secure four (4) gaskets in a safe location to avoid loss. -
Page 74: Display Only
IKONIC Tankless Water Heater Service Manual HOW TO REMOVE COMPONENTS 3.12 BLOWER CONT'D 7. Remove three screws and V enturi assembly. 3.13 DISPLAY ONLY 1. Remove top center screw from the display mount- 2. Remove connector connected to display. (Located ing bracket, and the screw located at the bottom of at left side of display). -
Page 75: Display With Display Mounting Bracket / Control Board Only
IKONIC Tankless Water Heater Service Manual HOW TO REMOVE COMPONENTS 3.13 DISPLAY WITH DISPLAY MOUNTING BRACKET 1. Remove two screws located at the bottom of the 2. Remove the connector “E” from the control board. unit. 3.14 CONTROL BOARD ONLY 1. -
Page 76: Control Board Only / Power Cord
IKONIC Tankless Water Heater Service Manual HOW TO REMOVE COMPONENTS 3.14 CONTROL BOARD ONLY 3.15 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 board- 2. -
Page 77: Thermistor Wiring Harness
IKONIC Tankless Water Heater Service Manual HOW TO REMOVE COMPONENTS 3.16 THERMISTOR WIRING HARNESS 1. Remove connector “I” from control board. 4. Remove BLACK Molex connector connected to outlet thermistor and YELLOW Molex connector 2. Remove display, and control board with bracket connected to heat exchanger thermistor. -
Page 78: Gas Control Wiring Harness
IKONIC Tankless Water Heater Service Manual HOW TO REMOVE COMPONENTS 3.17 THERMISTOR WIRING 3.18 GAS CONTROL WIRING HARNESS HARNESS NOTE: Before removing outlet thermistor, turn 1. Remove connector “J” from control board and de- off water to the water heater by closing the tach control board with bracket from water heater. -
Page 79: Fan Control Wiring Harness
IKONIC Tankless Water Heater Service Manual HOW TO REMOVE COMPONENTS 3.19 FAN CONTROL WIRING 3.20 HIGH VOLTAGE GROUND HARNESS WIRING 1. Remove two (2) Molex connectors; one (1) on the 1. Remove the screw on the bracket and the cable on blower, and D on the control board. -
Page 80: Power Control Wiring Harness
IKONIC Tankless Water Heater Service Manual HOW TO REMOVE COMPONENTS 3.21 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 Molex connectors;... -
Page 81: Display Control Wiring Harness
IKONIC Tankless Water Heater Service Manual HOW TO REMOVE COMPONENTS 3.22 DISPLAY CONTROL WIRING HARNESS 1. Remove the WHITE connector on the left side of the display. 2. Remove the connector E. -
Page 82: Orifice Plate (Nat/Lp)
IKONIC Tankless Water Heater Service Manual HOW TO REMOVE COMPONENTS 3.23 ORIFICE PLATE (NAT/LP) NOTE: Arrows on the front plate of the gas 1. Locate the solenoid valve shown in figure below and remove the connector with BLACK and YEL- orifice block shows the screws that needs to be removed. - Page 83 IKONIC Tankless Water Heater Service Manual HOW TO REMOVE COMPONENTS 3.23 ORIFICE PLATE (NAT/LP) NOTE: Install the orifice plate in the right 8. Place two (2) gaskets on the LP (or NAT) orifice plate. orientation. To ensure a leak free joint verify both gaskets on the orifice plate and both on gas valve is in place and are in good condi- tion, before attaching the gas orifice block.
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Page 84: 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 4. Select “Add Product on the Home screen. to download the EcoNet application. 2. Press WiFi Set up on the unit to begin connecting. 5. - Page 85 6. If using current location, select “ALLOW” when 8. Go to the WiFi settings on your phone, and connect prompted to allow Rheem EcoNet to access your to the EcoNet network for your device. location while you are using the application.
- Page 86 IKONIC Tankless Water Heater Service Manual HOW TO CONNECT CONNECTING TO WIFI 11. Once connected, the user may fill in the preferenc- es, customizations, and contractor information. 12. Go to Settings, select Account, then select Notifi- cation Settings to adjust preferences. 13.
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Page 87: Diagnostic Mode
1. Press the Wi Fi step up button until the unit beeps reconnect to the WiFi after thirty minutes. and the Wi Fi LED blinks blue. 2. From the Rheem contractor app click on the set- tings icon and select diagnostics Info. 3. Press the connect button in the app. - Page 88 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...