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SERVICE INSTRUCTIONS
18, 20,24, 26L Integrity
Electronic Gas Continuous Flow
Water Heater
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871024
871024-B
871024-C
871026
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Summary of Contents for Rheem 871018
- Page 1 SERVICE INSTRUCTIONS 18, 20,24, 26L Integrity Electronic Gas Continuous Flow Water Heater TM031 871018 871020 871024 871024-B 871024-C 871026 871026-B...
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Page 2: Table Of Contents
Burner Gas Pressure Check....................... 51 Component Replacement Procedures ..................52 Exploded View 1 871018 / 871020 / 871024 Replacement Parts List..........61 Exploded View 2 871018 / 871020 / 871024 ................. 62 Exploded View 2 871018 / 871020 / 871024 Replacement Parts List..........63 Exploded View 1 - 871024 Model .................... -
Page 3: Introduction
The information provided in these instructions is based on the water heater being installed in accordance with the Installation Instructions provided with each water heater. Should you require further technical advice on a Rheem Integrity Water Heater, contact your nearest Rheem Service Department where genuine replacement parts are also available. -
Page 4: Preset Temperature Adjustment
Preset Temperature Adjustment It is possible to choose a preset outlet water temperature setting when remote controllers are not fitted. The water heater comes factory set at 55ºC on 871 series models. Voltages up to 240 volts will be present within the water heater, take care not to touch wiring terminals. -
Page 5: Wiring Diagram - Models With Mechanical Bypass
Wiring Diagram - Models with Mechanical Bypass TM031 Integrity 18, 20, 24, 26L Service Instructions REV: B D.O.I: February 2008 Service. All printed copies not bearing this statement in RED are deemed “uncontrolled” This document is stored and maintained electronically by... -
Page 6: Wiring Diagram - Models With Solenoid Operated Bypass
Wiring Diagram - Models with Solenoid Operated Bypass... -
Page 7: Sequence Of Operation
Sequence of Operation Refer to „Sequence of Operation Component Diagram‟ on page 9 to view components shown in brackets e.g. (1) 1. When a hot water tap (1) is opened, cold water (or preheated water if a solar preheater is installed) enters the water heater and passes through the Water Flow Sensor (3) and Heat Exchanger (19). -
Page 8: Specifications
Specifications 871024 871024 871026 871026 Model 871018 871018 871020 871020 871024-B 871024-B 871026-B 871026-B 871024-C 871024-C Specification Natural Natural Natural Natural Max hourly gas cons.-MJ/Hr Min hourly gas cons.-MJ/Hr Min inlet wtr pressure-kPa Max inlet wtr pressure-kPa 1000 1000 1000... -
Page 9: Bypass Operation
Sequence of Operation Component Diagram Hot Water Tap Bypass Control Valve Water Flow Sensor Inlet Water Temperature Thermistor Combustion Chamber Thermistor Outlet Water Temperature Thermistor Water Flow Servo Motor Water Filter (Strainer) Gas Inlet Solenoid Valve Gas Solenoid Valve 1 Gas Solenoid Valve 2 Gas Solenoid Valve 3 PGFR Valve... -
Page 10: Anti-Frost Heater Circuit
Anti-Frost Heater Circuit Models with an „F‟ in the model number have an anti frost heater circuit e.g. 871024NF-B. The anti-frost heaters are wired in series and operate independently from the water heater. The 18 and 20 litre models have a 58-watt anti-frost system. The 24 and 26 litre models have an 82-watt anti-frost system. - Page 11 Note: The parts lists shown on pages 64 - 75 are for current 871026-B and 871024-C model heaters; superseded part numbers for 871024 and 871026 model heaters are not shown therein however they are listed in the following tables. Superseded Model Current Model 871024 Item...
- Page 12 Anti-frost heater A, Pt Nº 31-71644-00 (item 705) Anti-frost heater B, Pt Nº 31-71643-00 (item 706) Anti-frost thermostat, Pt Nº 20-57072-00 (item 714) Transformer (item 783) Old Part Number WH0020073 / New Part Number 31-71646-00 This part may be connected to existing wiring utilising electrical BP connectors otherwise in addition to the transformer it will also be necessary to replace: Connecting Cord, Pt Nº...
- Page 13 In addition to the signal loom it will also be necessary to replace: Inlet thermistor, Pt Nº 20-64773-00 (item 717) Heat Exchanger thermistor, now part of the signal loom Pt Nº 31-76655-00 (item 758) Outlet thermistor, Pt Nº 20-64774-00 (item 713) Overheat Limiter, Pt Nº...
- Page 14 Overheat Limiter (item 701) Old Part Number 54-02730-00 / New Part Number 31-79562-00 In addition to the overheat limiter it will also be necessary to replace: Signal Loom, Pt Nº 31-76655-00 (item 758) Ambient air thermistor, now part of the signal loom Pt Nº 31-76655-00 (item 758) Heat Exchanger thermistor, now part of the signal loom Pt Nº...
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Page 15: In-Series Gas Boosting
In-series Gas Boosting Temperature controllers must not be fitted if this water heater is installed as part of a solar water heater system because water at a temperature much higher than the controller setting can be delivered. If a solar pre-heater has been installed to an existing Integrity water heater installation then a solar bypass valve or a comparator must be fitted at this water heater and any controllers, if fitted, must be disconnected and removed. - Page 16 The solar bypass valve has been specifically designed to work with Rheem Integrity models listed above. 20 and 26 models ending with a B do not require a bypass valve. 24 models ending with -C do not require a bypass valve.
- Page 17 An electronic device called a Comparator (part number 052127) is now available to replace the solar bypass valve and is suitable for use on Rheem 871020, 871024, 871024-B and 871026 models heaters. NOTE: 20 and 26L models with a B suffix and 24L models with a C suffix in the model number do not require either a solar bypass valve or a comparator.
- Page 18 Removing a Solar Bypass Valve and Installing a Comparator 1. Ensure power and water to the water heater is isolated. 2. Remove the front cover (refer to component procedure 1 on page 52). 3. Locate the 2 pin wiring plug in the wiring loom to the cold sensor mounted on the water body (refer to fig 1) and disconnect.
- Page 19 In-series Gas Boosting 871020, 871024, 871024-B & 871026 Solar Loline Installation Note: For 871020, 871024 & 871024-B and 871026 model heaters fitted with a comparator refer to diagram on page 15. For more information on comparators refer to page 17. In-series Gas Boosting 871020, 871024, 871024-B &...
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Page 20: Tempering Valves
Tempering Valves On 871 series models where a tempering valve is fitted and there is not a separate untempered line for the kitchen or laundry areas, the Kitchen temperature controller will not be able to display temperatures above 55 C and the delivered water temperature at the tap will be that set by the tempering valve, which will be no hotter than 55 ... - Page 21 Standard Controller Controller Controller „In use‟ light „priority‟ light Water temperature Controller adjustment display panel buttons (water temp or water volume) Controller Water volume ON / OFF button button Note: If one or more controllers are installed, at least one must be on for the water heater to operate.
- Page 22 (up button) The up button increases the temperature setting. (down button) The down button decreases the temperature setting. (Kitchen controller only) – This feature enables an alarm to Water volume button sound when a set volume of water has flowed through the water heater (refer to notes below).
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Page 23: How To Fault Find
How to Fault Find When conducting fault finding techniques it is important to understand that the same error code with a different sequence number can be displayed at different points during the operational sequence of the water heater. It is important to determine where the fault occurred in relationship to the operational sequence of the water heater before commencing fault finding tests, as the tests may differ even though the same error code can be displayed. - Page 24 (S.V. 2) (S.V. 3) Test Equipment A list of test equipment which will assist in conducting diagnostic procedures is provided below. This equipment is available from Rheem Service Spare Parts Department. Flame detection simulator WH0020080 Flame sensor current (uA) detection kit...
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Page 25: Operational Flow Charts 1 & 2
871024-C / 871026-B < or = set temp temp ? 871024 / 871024-B 871024 / 871024 - B - 2 ºC ? 871018 / 871020 / 871026 & 875024 - B Max & Min 24 Flashing Fan On buttons off ? - Page 26 Operational Flow Chart 3 G . I . S . V ( SVO ) on Igniter on Igniter off P . G . F . R Valve off S . V . 2 ( SV 2 ) off S . V . 1 ( SV 1 ) on S .
- Page 27 Operation Flow Chart 4 & 5 Hot tap closed Post Purge Shut Down Function Water flow sensor off Check gas cut off function by G . I . S . V ( SVO ) off alternating the closing order of gas valves SVO and SV 1 - 3 at [ S .
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Page 28: Error Codes
Error Codes The following table outlines the error codes, possible causes and diagnostic tests to conduct. More detailed diagnosis is outlined in the fault finding and operational flow charts. Error Fault Condition Items To Check Code Abnormal low rate combustion Blockage in the heat exchanger, fan, air intake or flue P.G.F.R Valve - diagnostic point 10 G.I.S Valve - diagnostic point 11... -
Page 29: Diagnostic Test Points
Diagnostic Test Points Refer to wiring diagram, page 5, for connector and wiring positions. Measuring Point Test Normal Condition Items Under Test Wire Nº Point Connector & colour R1 – R2 AC 85V – 120V Main Power W8 – W12 50 kilo-ohms –... -
Page 30: Maintenance Information
Maintenance Information Information relating to both the current and past operation of the water heater can be obtained from the memory; this information is referred to as the maintenance information. The table below details the information that can be recalled from the memory i.e. to view the current temperature being measured by the outlet thermistor select 5Y, refer to page 31 for the procedure to display maintenance information. -
Page 31: Clearing Error Code History
Displaying Maintenance Information Voltages up to 240 volts will be present within the water heater, take care not to touch wiring terminals. Use an insulated tool when operating the DIP switch or MIN and MAX buttons. At the Water Heater 1. -
Page 32: Resetting Error Codes
Resetting Error Codes Most Error Codes can be reset by shutting off the hot water flow and turning the controllers (if fitted) off and then on again. It may also be necessary to isolate and restore the power. Where controllers are not fitted it may be necessary to turn the power off at the water heater to clear the error code. -
Page 33: Fault Diagnosis Sequence (Fault Finding Chart G)
Fault Diagnosis Sequence (Fault Finding Chart G) NOTE: If the power has been disconnected from the Turn on power to the water heater wait 30seconds from power restoration water heater before commencing this procedure. Note: Bars are displayed for approx 10 seconds 2 bars displayed in the LED? -
Page 34: Fault Finding Chart 1
Fault Finding Chart 1 Voltages up to 240 volts will be present within the water heater, take care not to touch wiring terminals. Use an insulated tool when operating the DIP switch or MIN and MAX buttons. Power Supply Is 240 volts AC Present at No power supply. - Page 35 Fault Finding Tests 1 – 4 Components will be “Live” when conducting tests, exercise caution. Test 1 Test 2 Measure the voltage at the connector plug to Measure the voltage at the connector plug transformer primary winding with from the transformer secondary winding with multimeter set on the AC voltage scale.
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Page 36: Fault Finding Chart 2
Fault Finding Chart 2 TM031 Integrity 18, 20, 24, 26L Service Instructions REV: B D.O.I: February 2008 Service. All printed copies not bearing this statement in RED are deemed “uncontrolled” This document is stored and maintained electronically by... - Page 37 Fault Finding Tests 5 – 8 Isolate power before removing connector plugs Test 5 Test 6 Unplug connector B from the PCB and measure Unplug connector K from the PCB. Restore the resistance of the Over Heat Limiter Assembly. power and check if error code 79 is displayed Resistance should be between 50kilo-ohms and within 30 seconds.
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Page 38: Fault Finding Chart 3
Fault Finding Chart 3 Ignition and Temperature Control Operation switch malfunction Is error Is error code 24 shown on code 24 Replace the remote controller. error code display displayed? also? Test 7 Also when Release the Min/Max buttons and Min/Max button is re-open a hot tap. - Page 39 Fault Finding Tests 9 – 13 Isolate power when conducting resistance tests. “Live” components present during voltage tests, exercise caution Tests 9 and 10 – Diagnostic Point 4 Test 11 Diagnostic Point 4 Conduct test with water flowing Test Check Point Measured Value Isolate power before removing connector plugs...
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Page 40: Fault Finding Chart 3.1
Fault Finding Chart 3.1 Test 11 False flame detection malfunction Is flame Is error detection signal in code 72 Replace the PCB assembly. maintenance information displayed? Clean or replace the combustion chamber front panel assembly. Ignition failure or cross light failure Is error code 11... -
Page 41: Fault Finding Chart 3.2
Fault Finding Chart 3.2 Is gas available? Open the gas isolation valve. Test 14 Is the gas pressure correct there voltage at the Replace the PCB assembly. at the burner test gas inlet solenoid point? valve? Test 15 Is the resistance of the gas Replace the proportional gas flow inlet solenoid valve... - Page 42 Fault Finding Tests 14 – 22 Isolate power when conducting resistance tests. “Live” components present during voltage tests, exercise caution. Tests 14, 15, 18, 19, 20 and 21 NOTE: Measure the voltage with connector L plugged into PCB Measure the resistance with connector L unplugged from the PCB Solenoid Normal...
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Page 43: Fault Finding Charts 3.3 And 3.5
Fault Finding Charts 3.3 and 3.5 Flame failure Are the Is error max and min Adjust maximum and minimum code 12 burner pressures burner pressures. displayed? correct? Abnormal Clean the heat exchanger, combustion Is error combustion chamber, fan and air code 10 or 99 intake. -
Page 44: Fault Finding Chart 3.6
Fault Finding Chart 3.6 Test 30 Water flow Integrity temp the bypass servo set below 46 solenoid open malfunction degrees. circuit? Is error Integrity temp Replace water body assembly. code 65 set above 46 displayed? degrees. Note: the bypass solenoid is activated only Mechanical if the set temperature is below 46 degrees. - Page 45 Fault Finding Tests 23 – 28 Test 23 - Diagnostic Point 18 Test 24 - Diagnostic Point 18 Conduct test with water flowing Conduct test with water flowing Test Point Test Point Measured Value Measured Value Connector H Connector H DC8 –...
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Page 46: Fault Finding Chart 3.7
Integrity outlet temp outlet temp to an in - series gas displayed ? set at 60 ºC ? 60 ºC *871018, 871020 Booster ? 871024, 871024-B 871026 ** Error code 16 will occur if the model heaters are Integrity heats the water to 20 º... -
Page 47: Fault Finding Chart 3.8
Fault Finding Chart 3.8 Fan current detecting circuit failure Error code 79 Error code displayed prior to 79 displayed. opening the hot tap? Replace the PCB assembly. Note: only replace the PCB assembly if error code 79 is displayed during combustion. Fault Finding Tests 29 –... -
Page 48: Fault Finding Charts 4 And 4.1
Fault Finding Charts 4 and 4.1 Is the Read Is the water Integrity used as maintenance flow more than 3 an in-series gas information 1y litres/min? booster? 1y = Water flow detected by water flow sensor Test 28 Is the voltage between Controllers Replace the PCB assembly. -
Page 49: Fault Finding Chart 4.2
Fault Finding Chart 4.2 871020 & 871026, 871024 & 871024-B 871024 & 871024-B models must have a models must have a solar bypass valve or solar bypass valve or a comparator fitted a comparator fitted when used as an in- Is a Is a when used as an in-series gas booster. -
Page 50: Fault Finding Chart 4.3
Fault Finding Chart 4.3 Water will be diverted by the the preheated solar bypass valve. No water will water to the solar flow through the Integrity bypass valve > therefore it will not operate. 57ºC? Normal operation. Read 1y = Water flow maintenance detected by water information 1y... -
Page 51: Fault Finding Chart 5
Fault Finding Chart 5 Fault Finding Tests 32 and 33 Test 32 Components will be “Live” when conducting test, exercise caution Conduct test with water flowing Measure the voltage at the 3 pin connector located between the water flow sensor and the comparator. -
Page 52: Component Replacement Procedures
Adjustment Adjustment of the burner pressure will not overcome problems associated with poor supply pressure or incorrect gas supply pipe sizing. Minimum Burner Gas Pressure 1. Remove the front panel from the water heater. 2. Remove burner test point screw and fit manometer. 3. - Page 53 Burner Change-Over Assembly: (Procedure 2) 1. Remove the front panel. Refer to Procedure 1. 2. Disconnect the wiring plug from each of the solenoid valves. (Note which plug goes to each valve) 3. Remove the screw retaining the ignition pack to the Burner Change Over Assembly. 4.
- Page 54 Proportional Gas Flow Regulating Valve: (Procedure 7) 1. Remove the front panel and Burner Change Over Assembly. Refer to Procedures 1 and 2. 2. Disconnect the gas supply pipe from the gas inlet connection. 3. Remove the three screws from the gas inlet connector and withdraw the connector and o-ring from the base of the water heater.
- Page 55 Anti-Frost Heaters: (Procedure 10) Note: Only models with an „F‟ in the model number are fitted with anti-frost heaters e.g. 871024NF. 1. Remove the front panel. Refer to Procedure 1. Heat Exchanger and Hot Water Outlet Connection Heaters 1. Disconnect connector plugs at the sensing thermostat and at the power cord. 2.
- Page 56 Ignition Pack Replacement: (Procedure 12) 18 - 20 Litre 1. Remove the front panel, Refer to Procedure 1. 2. Disconnect high voltage lead from spark electrode. 3. Disconnect the multi pin connector from the Ignition Pack. 4. Remove the retaining screw. 5.
- Page 57 5. Press the MAX button. On all 871024 & 871026 models 4H should be displayed. On all 871018 & 871020 models 3H should be displayed 6. Test operation of water heater and ensure the MIN and MAX burner gas pressures are correct.
- Page 58 Power Filter: (Procedure 19) Note: When a power filter is installed as a spare part in an 871024, 871024-B model heater other interconnecting components will also require replacing. Refer to „Product Changes‟ on page 10 and „Parts Replacement Scenarios‟ on page 11 for more information.
- Page 59 Connecting cord: (Procedure 23) Note: When a connecting cord is installed as a spare part in any model heater other interconnecting components may also require replacing. Refer to „Product Changes‟ on page 10 and „Parts Replacement Scenarios‟ on page 11 for more information. 1.
- Page 60 Exploded View 1 871018 / 871020 / 871024 TM031 Integrity 18, 20, 24, 26L Service Instructions REV: B D.O.I: February 2008 Service. All printed copies not bearing this statement in RED are deemed “uncontrolled” This document is stored and maintained electronically by...
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Page 61: Exploded View 1 871018 / 871020 / 871024 Replacement Parts List
Exploded View 1 871018 / 871020 / 871024 Replacement Parts List Ref. 871018 Description 871024 871020 Front Panel Assembly WH0020000 WH0020000 Jacket Assembly WH0020001 WH0020001 Mounting Bracket WH0020002 WH0020002 Reinforcing Plate WH0020003 WH0020003 Cord Connector WH0020004 WH0020004 Fixing Plate B... -
Page 62: Exploded View 2 871018 / 871020 / 871024
Exploded View 2 871018 / 871020 / 871024 TM031 Integrity 18, 20, 24, 26L Service Instructions REV: B D.O.I: February 2008 Service. All printed copies not bearing this statement in RED are deemed “uncontrolled” This document is stored and maintained electronically by... -
Page 63: Exploded View 2 871018 / 871020 / 871024 Replacement Parts List
Exploded View 2 871018 / 871020 / 871024 Replacement Parts List Ref. 871018 Description 871024 871020 Silicone Tube (Insulator) WH0020045 WH0020045 Silicone Tube (Insulator) WH0020046 WH0020046 Anti-Frost Heater WH0020047 WH0020008 Anti-Frost Heater Assembly WH0020088 WH0020048 Anti-Frost Heater Clamp WH0020049 WH0020049 Anti-Frost Heater “C”... -
Page 64: Exploded View 1 - 871024 Model
Exploded View 1 - 871024 Model TM031 Integrity 18, 20, 24, 26L Service Instructions REV: B D.O.I: February 2008 Service. All printed copies not bearing this statement in RED are deemed “uncontrolled” This document is stored and maintained electronically by... - Page 65 Exploded View 1 Replacement Parts List – 871024 Models Ref. No. Description 871024 Front Panel Assembly 31-76496-00 Jacket Assembly 31-23525-00 Mounting Bracket WH0020002 Reinforcing Plate WH0020003 Cord Connector WH0020004 Fixing Plate B WH0020005 Gas Inlet Connector ¾” 31-76255-00 Proportional Gas Flow Regulating Valve WH0020007 O‟ring WH0020009...
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Page 66: Exploded View 2 - 871024 Models
Exploded View 2 – 871024 Models TM031 Integrity 18, 20, 24, 26L Service Instructions REV: B D.O.I: February 2008 Service. All printed copies not bearing this statement in RED are deemed “uncontrolled” This document is stored and maintained electronically by... - Page 67 Exploded View 2 Replacement Parts List – 871024 Models Ref. No. Description 871024 Silicone Tube (Insulator) 20-43376-00 Silicone Tube (Insulator) 20-43376-00 Anti-Frost Heater (Heater A) (Anti-frost models only) 31-71644-00 Anti-Frost Heater (heater B) (Anti-frost models only) 37-71643-00 Anti-Frost Heater Clamp (Anti-frost models only) WH0020049 Anti-Frost Heater “C”...
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Page 68: Exploded View 3 - 871024-B Model
Exploded View 3 - 871024-B Model Fitted with solenoid operated bypass TM031 Integrity 18, 20, 24, 26L Service Instructions REV: B D.O.I: February 2008 Service. All printed copies not bearing this statement in RED are deemed “uncontrolled” This document is stored and maintained electronically by... - Page 69 Exploded View 3 Replacement Parts List - 871024-B Model Fitted with solenoid operated bypass Ref. 871024-B Description Front Panel Rheem Brand (50 & 60ºC Models) 31-76496-00 Front Panel Everhot Brand (50 & 60ºC Models) 31-76498-00 Jacket Assembly 31-23525-00 Mounting Bracket...
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Page 70: Exploded View 4 - 871024-B Model
Exploded View 4 - 871024-B Model Fitted with solenoid operated bypass TM031 Integrity 18, 20, 24, 26L Service Instructions REV: B D.O.I: February 2008 Service. All printed copies not bearing this statement in RED are deemed “uncontrolled” This document is stored and maintained electronically by... -
Page 71: Exploded View 4 Replacement Parts List - 871024-B Model
Exploded View 4 Replacement Parts List - 871024-B Model Fitted with solenoid operated bypass Ref. No. 871024-B Description Silicone Tube (Insulator) 20-43376-00 Silicone Tube (Insulator) 20-43376-00 Anti-Frost Heater (Heater A) 31-71644-00 Anti-Frost Heater Assembly (heater B) 37-71643-00 Anti-Frost Heater Clamp WH0020049 Anti-Frost Heater “C”... -
Page 72: Exploded View 5 - 871024, 871026 & 871026-B Models
Exploded View 5 – 871024, 871026 & 871026-B Models Fitted with solenoid operated bypass TM031 Integrity 18, 20, 24, 26L Service Instructions REV: B D.O.I: February 2008 Service. All printed copies not bearing this statement in RED are deemed “uncontrolled” This document is stored and maintained electronically by... - Page 73 Exploded View Replacement Parts List 5 - 871024-C, 871026 & 871026B Models Fitted with solenoid operated bypass 871026 Item No Description 871024-C 871026-B Front Panel Rheem Brand (50 & 60ºC Models) 31-76496-00 Jacket Assembly 31-23525-00 Mounting Bracket WH0020002 Reinforcing Plate...
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Page 74: Exploded View 6 - 871024-C, 871026 & 871026-B Models
Exploded View 6 - 871024-C, 871026 & 871026-B Models Fitted with solenoid operated bypass TM031 Integrity 18, 20, 24, 26L Service Instructions REV: B D.O.I: February 2008 Service. All printed copies not bearing this statement in RED are deemed “uncontrolled” This document is stored and maintained electronically by... - Page 75 Exploded View 6 Replacement Parts List - 871024-C, 871026 & 871026-B Models Fitted with solenoid operated bypass 871026 Item No Description 871024-C 871026-B Silicone Tube (Insulator) 20-43376-00 Silicone Tube (Insulator) 20-43376-00 Anti-Frost Heater (Heater A) 31-71644-00 Anti-Frost Heater Assembly (Heater B) 31-71643-00 Anti-Frost Heater Clamp WH0020049...
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Page 76: Gas Type Conversion Procedure
Gas Type Conversion Procedure 1. Isolate the power and gas supply to the water heater. 2. Remove the front panel. (Refer to Procedure 1). 3. Remove the Burner Change Over Assembly (Refer to Figure 1 and Procedure 2). 4. Remove the Combustion Chamber Front Panel Assembly. (Refer to Figure 2 and Procedure 3). - Page 77 Figure 3 Figure 4 Figure 5 TM031 Integrity 18, 20, 24, 26L Service Instructions REV: B D.O.I: February 2008 Service. All printed copies not bearing this statement in RED are deemed “uncontrolled” This document is stored and maintained electronically by...
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