EverHot Everhot 623050, Service Instructions Manual

Page 1: ...echnical Support All printed copies are deemed uncontrolled Rheem Australia Pty Ltd ABN 21 098 823 511 Rheem and Everhot Heavy Duty Electric Water Heaters TM014 Issued Jul 02 Revision AC Issued Aug 2016 Rheem Everhot 613050 623050 613315 623315 616315 610340 610430 ...

Page 2: ...DEL IDENTIFICATION 3 SPECIFICATIONS 4 OPERATION 4 COMPONENTS AND THEIR FUNCTION 5 PREVENTATIVE MAINTENANCE 6 WIRING DIAGRAMS 7 Three Element Models 7 Six Element Models 7 PRODUCT CHANGES 8 COMMON FAULTS 9 FAULT FINDING 12 No Hot Water 13 Insufficient Hot Water 14 Component Testing 15 Leaking Water Heater 18 Water Too Hot 19 Noisy Water Heater 20 Electrical Insulation Test 20 ELECTRICAL INSULATION ...

Page 3: ...ectric Water Heater in the minimum of time Safety precautions or areas where extra care should be observed when conducting tests outlined in this manual are indicated by print in bold italics and or a warning symbol Take care to observe the recommended procedure Certain diagnostic procedures outlined in these service instructions require live testing to be conducted Personal Protective Equipment P...

Page 4: ...lement and thermostat combination to be supplied between each active conductor phase and neutral On six element models the wiring is configured for two element and thermostat combinations to be supplied between each active conductor phase and neutral Water temperature is maintained via the thermostat switching the active conductor to an electric immersion element The thermostat and corresponding e...

Page 5: ...the water heater cylinder to assist with stratification It also acts as a fitting liner Fitting Liner A plastic tube installed in the cold water inlet of the water heater to provide protection against corrosion through the life of the water heater Anode Sacrificial A metal alloy electrode installed in the water heater cylinder that by galvanic action protects the cylinder from corrosion Thermostat...

Page 6: ...e the valve gently 3 Check for leaks at all tank fittings 4 Check for signs of excessive corrosion on the water heater jacket 5 If an overflow tray is installed check to ensure the overflow tray drain pipe is not blocked 6 Isolate power to the water heater and check all electrical connections for signs of overheating due to poor connection 7 Conduct an electrical insulation test on the water heate...

Page 7: ...EV AC Issued 15 08 2016 This document is stored and maintained electronically by Rheem Technical Support All printed copies are deemed uncontrolled 7 WIRING DIAGRAMS Three Element Models EWT Thermostat ST Thermostat Six Element Models EWT Thermostat ST Thermostat ...

Page 8: ...Fig 4 Thermostat clamp Earth tab The new design cylinder element barrels do not have an earthing tab and require the earth bond to be connected to the earthing tab on the thermostat clamp refer to Fig 4 When installing an early or new type element on a cylinder barrel that has an earth tab this earth tab must be used refer to Fig 3 When installing an early or new type element on a new type cylinde...

Page 9: ...e household and compare this with the potential delivery of the model water heater installed It can then be established if the usage is within or outside the capacity of the model The areas to look at for excessive usage are 1 Automatic washing machines 2 Showers exceeding 12 litres minute for mixed water and 5 minutes in duration 3 Two or more showers operating at the same time 4 Change of occupa...

Page 10: ...es then do either of the following a With your ear close to the stopcock turn it on slightly and listen for any water passing If there are no leaks water should not pass b Open a hot tap while listening for any pressure release If there is a pressure release there will be no leaks in the plumbing system Mixing or crossed connections If an automatic dishwasher washing machine flick mixer tap temper...

Page 11: ...input to the water moving through the building and can be confused as the installation being undersized or a malfunction of the water heaters The principle of Equa Flow is to ensure the demand on each water heater in the bank is the same as any other To achieve this the following are necessary 1 The cold water manifold must be designed to balance the flow to each unit i e each branch line must be ...

Page 12: ...l Support All printed copies are deemed uncontrolled 12 In Line Manifold Back to Back Manifold Angle Manifold FAULT FINDING Fault diagnosis YES Is the complaint for no hot water YES 1 Is the complaint for insufficient hot water NO Is the complaint for a leaking water heater NO YES Is the complaint for a leaking water heater NO YES Noisy Water Heater 2 3 4 5 ...

Page 13: ...olating switch turned off Are the fuse s blown at the switchboard Has the heater been connected incorrectly i e active connected to neutral terminal YES NO 1 Possible fault in building electrical wiring continue with diagnosis to confirm water heater is operational Test 1 Test 2 NO 2 YES Test 1 Isolate power and reconnect correctly Follow flow chart 2 to diagnose any damaged components YES Carry o...

Page 14: ... more than 1 heater or may be a result of poor manifolding NO YES Install the element correctly and reset the ECO NO YES NO NO YES Replace Element NO YES Are the thermostat ECO contacts closed Is the element installed in the correct orientation Are the thermostat contacts closed Is the temperature at the TPR valve at least 12 degrees lower than the thermostat setting Does the element have the corr...

Page 15: ... when conducting these tests TEST 1 3 Element Models TEST 1 6 Element Models Using a multimeter on the AC voltage scale measure between each active and neutral on the terminal block Normal voltage is 240 volts Warning Live equipment Personal Protective Equipment should be worn when conducting these tests TEST 2 3 Element Models TEST 2 6 Element Models Using a multimeter on the AC voltage scale mea...

Page 16: ...imeter set on the resistance scale measure between terminals 3L and 4L on the thermostat The reading should be less than 1 ohm Using a multimeter set on the resistance scale measure between terminals 3 and 4 The reading should be less than 1 ohm Test 7 EWT Thermostat ST Thermostat Using a multimeter on the resistance scale measure between terminals 1L and 2T on the thermostat The reading should be...

Page 17: ... resistance scale measure between terminals 2T and 4L of the thermostat Normal resistance for the heating unit is 3 6kW 15 17 ohms 4 8kW 11 13 ohms 6 0kW 9 11 ohms Disconnect both element wires from the thermostat and using a multimeter set on the resistance scale measure between the two disconnected element wires Normal resistance is as follows 3 6kW 15 17Ω 4 8kW 11 13Ω 6 0kW 9 11 ohms Test 9 EWT...

Page 18: ... Rheem Plus models additional cold water tee fitting and tempering valve need checking before the pressure test YES NO YES NO Remove element and replace gasket YES YES YES NO NO Remove T PR valve and reseal with thread tape YES YES Replace water heater YES YES NO NO NO NO Is the leak from or near the top of the tank Is the leak from the anode Is the leak from the element barrel weld Is the leak fr...

Page 19: ...ering devices should be suggested as a solution YES Remove the thermostat and clean any scale from the cylinder wall Re tension bracket and refit thermostat NO YES Refit element correctly NO Replace thermostat YES Reset the ECO YES NO Are the thermostat contacts closed NO Does the water temperature at the T PR valve correspond with or near the thermostat setting Are the thermostats in good contact...

Page 20: ...n This noise is normal operation YES Check all other appliances that can generate noise i e washing machine dishwasher ball cocks etc NO YES Refer to water hammer causes in Common Faults Chapter Is the noise water hammer Is the noise only evident when water is flowing through the water heater Is the noise a metallic dropping sound Is the water pressure more than 80 of the T PR valve rating 5 Is th...

Page 21: ...utral of the water heater wiring and earth 4 Operate megger A reading above 1 mega ohm should be obtained 5 If a reading below 1 mega ohm is indicated all component parts will need to be individually tested to locate the fault Refer to flow diagram 6 Test No 4 Insulation resistance of the water heater Active Circuit Reading not to be below 1 mega ohm 6 Connect megger leads to the active of the wat...

Page 22: ...e cold water supply pipe 5 Fit a drain hose to the cold water connection and run the other end to a drain or safe location 6 Open the temperature and pressure relief valve to allow air into the system TEMPERATURE AND PRESSURE RELIEF VALVE PROCEDURE 2 Never fit a T PR valve with a rating higher than that indicated on the water heater rating plate Do not use reconditioned T PR valves 1 Isolate the p...

Page 23: ...element models refer to page 5 6 element models refer to page 6 7 Check water heater internal wiring insulation for cracking 8 Conduct an electrical insulation test Refer to page 18 9 Refit the thermostat protective cover and the access cover 10 Restore the power supply DIP TUBE PROCEDURE 4 1 Isolate the power and water supplies to the water heater 2 Relieve pressure from the water heater through ...

Page 24: ... electric shock Refer to Rheem Safety Procedure on electrical testing Where a fault or leak is traced to the element the water heater should be drained to prevent damage to flooring or floor coverings by accidental flooding 1 Isolate power and water supplies and remove the access cover 2 Confirm with a multi meter between each Active and Neutral at the terminal block that voltage is not present 3 ...

Page 25: ...014 Rev Details of change D O I A Service Instructions issued 07 02 B Format updated to current style Fault finding flow charts updated ST thermostat added Exploded views and spare parts lists removed refer to SPM COMM Spare Parts Manual Commercial Warranty statement removed 09 13 AC Document title change and Everhot models added 08 16 NOTE Every care has been taken to ensure accuracy in preparati...