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TM017 Rheem Air Sourced Heat Pump Service Instructions REV: C 
Date of Issue: 5/11/05 

This document is stored and maintained electronically by 

 Service. All printed copies not bearing this statement in RED are deemed “uncontrolled”. 

3

Specifications 

 

Water Heater 

 

 Model 

55027500 

55127507 

Capacity - Litres 

275 

275 

Boost Capacity - Litres 

0 

130 

Booster element rating - kW 

Not fitted 

2.4 or 3.6 

T&PR valve Rating - kPa 

1000 

1000 

With ECV 

680 

680 

Maximum inlet pressure - kPa 

Without ECV 

800 

800 

Inlet / Outlet 

RP¾/20 

RP¾/20 

Water Connections 

T&PR RP½/15 

RP½/15 

Quantity 2 

2 

Anode 

Length 1153 

1153 

Compressor t/stat setting (fixed)  - ºC  

49ºC* 

55ºC* 

Booster thermostat setting (trade adjustable) - ºC 

Not fitted 

60ºC 

Booster ECO setting - ºC 

N/A 

85ºC 

*Delivered water temperature 65-75ºC 

 

Refrigeration System 

 

Parameter 55027500 

55127507 

Superheat setting (Factory) 

+3ºC at 10ºC Evaporator temp. 

Compressor ECO setting 

105ºC, manual reset 

R22 1350 

grams 

Refrigerant charge 

R409A 1250 

grams 

Bypass solenoid coil resistance 

2 kilo-ohms @ 20ºC 

Not fitted 

Capacitor 

25 microfarads 370/450 VAC 50/60HZ 

Fan motor winding resistance 

47.2 ohms at 20ºC 

Closed   

–3.5ºC 

De-ice thermostat 

Open 

3ºC +/- 1.5ºC

Not fitted 

Closed  7ºC +/- 1.5ºC 

Evaporator thermostat 

Not fitted 

Open   –3.5ºC evap temp  

Compressor winding resistance 

Run winding - Red & Blue: 3.33 ohms  
Start winding - Red & Black: 6.01 ohms at 20ºC 

 

Preventative Maintenance 

 

It is suggested for peak performance that the water heater be serviced annually. 

 

1.  Check for discharge from the T&PR valve. When the elements are operating a small 

discharge of water may be evident.  Operate the valve-easing lever to ensure the valve 
opens and resets properly.  Always open and close the valve gently. The T& PR valve 
should be replaced at 5 yearly intervals. 

2.  Check for leaks at all cylinder fittings. 

3.  Check for signs of excessive corrosion on the water heater jacket. 

4. 

Isolate power

 to the water heater and check all electrical connections for signs of 

overheating due to poor connection. 

5. Conduct an 'Electrical insulation test' on the water heater. (Refer to page 30) 

6.  Check evaporator fins and fan blade for build up of dust or debris. 

7.  Check for sludge build up and if necessary drain and flush tank. 

Содержание 55027500

Страница 1: ...RED are deemed uncontrolled R Rh he ee em m A Au us st tr ra al li ia a P Pt ty y L Lt td d A AB BN N 2 21 1 0 09 98 8 8 82 23 3 5 51 11 1 SERVICE INSTRUCTIONS Air Sourced Heat Pump TM017 R R Re e ev...

Страница 2: ...m Fault Finding Chart 1 4 2 2 21 Refrigerant System Fault Finding Chart 2 22 De ice Thermostat Fault Finding Chart 2 3 24 Evaporator Thermostat Fault Finding Chart 2 4 24 Insufficient Hot Water Chart...

Страница 3: ...licensed to work with refrigerants may only carry out service and repair to the sealed refrigeration system During repair the refrigerant must be recovered not vented to atmosphere Environmental At th...

Страница 4: ...hms 20 C Not fitted Capacitor 25 microfarads 370 450 VAC 50 60HZ Fan motor winding resistance 47 2 ohms at 20 C Closed 3 5 C De ice thermostat Open 3 C 1 5 C Not fitted Closed 7 C 1 5 C Evaporator the...

Страница 5: ...state back into a liquid condenses The refrigerant then enters the evaporator again and the cycle is repeated A metering device called a TX valve is positioned between the condenser and evaporator to...

Страница 6: ...The action of a substance as it releases heat and changes state condenses from a vapour gas to a liquid Components and their Function Temperature and Pressure Relief Valve A valve designed to provide...

Страница 7: ...or This device fitted in the suction line prior to the compressor is designed to accumulate and prevent liquid refrigerant from entering and damaging the compressor Any liquid refrigerant is evaporate...

Страница 8: ...ent High water pressure areas will have more complaints of this nature and the use of a pressure limiting valve PLV to reduce the household cold water pressure will usually solve most problems Hot wat...

Страница 9: ...uitable for conversion to R409A and the Heat Pump will need to be replaced 551 Series In August 2004 a number of changes were made to the 551 Series Heat Pump In order to identify the change an additi...

Страница 10: ...REV C Date of Issue 5 11 05 This document is stored and maintained electronically by Service All printed copies not bearing this statement in RED are deemed uncontrolled 9 55127507 Manufactured before...

Страница 11: ...Instructions REV C Date of Issue 5 11 05 This document is stored and maintained electronically by Service All printed copies not bearing this statement in RED are deemed uncontrolled 10 Refrigeration...

Страница 12: ...ormance Graph Rheem Heat Pump Recovery Rate L h 45 C Rise 50 55 60 65 70 75 10 15 20 25 30 35 40 Air Temperature Litres Fault Finding Flow Chart Table Fault Chart Number Page 1 13 1 1 14 1 2 18 1 3 19...

Страница 13: ...ronically by Service All printed copies not bearing this statement in RED are deemed uncontrolled 12 Fault Finding Fault Diagnosis No hot water Is the compressor running YES 2 YES Model NO 1 550275 7...

Страница 14: ...heater connected to an off peak tariff NO Off peak connection is unsuitable for Heat Pump models Connect to continuous tariff or off peak 2 if available YES Is the isolating switch turned off NO Rest...

Страница 15: ...thermostat 1 5 Test 2 550275 and 551275 Test 2A 551275 A NO Are the thermostat contacts closed Isolate power NO 2 1 Replace fan motor and reset compressor over temperature cut out NO YES Is the fan m...

Страница 16: ...easure between active and neutral on the terminal block Normal voltage is 240 volts Test 2 Ensure power is isolated before conducting this test 550275 551275 Disconnect one wire from the thermostat an...

Страница 17: ...mal resistance is 47 2 ohms Test 3A Ensure power is isolated before conducting these tests Compressor overload Disconnect the wiring to the compressor overload Using a multimeter set on the x1 resista...

Страница 18: ...t 5 Ensure power is isolated before conducting this test Disconnect the wiring to the capacitor and using a multimeter set on the capacitance uf scale measure across the capacitor terminals Normal cap...

Страница 19: ...cal fault rectified NO YES Is the head pressure excessive Test 7 Check for high condensing temperature due to 1 Controlling thermostat not cutting out 2 Restriction or blockage in system 3 Incorrect T...

Страница 20: ...551275 Possible restriction in system Locate and repair Possible system overcharge Evacuate and recharge TX Valve metering incorrectly Adjust or replace TX valve YES Component Test 7 Warning Live equi...

Страница 21: ...ls indicative current draw for a given pressure ration Pressure ratio Discharge pressure gauge Suction pressure gauge 7 0 5 4 5 6 Indication of correct refrigerant charge The receiver filter dryer sig...

Страница 22: ...icient System overcharged Adjust refrigerant charge YES 2 2 YES Replace bypass valve NO Test 10 Component Test 9 Warning Live equipment Personal Protective Equipment should be worn when conducting thi...

Страница 23: ...ding Chart 2 2 2 3 YES Has the supply of hot water been recently depleted Depending on the ambient temperature the water heater may take 2 or 3 hours to recover YES Is the evaporator frozen Is the suc...

Страница 24: ...he terminal strip Normal resistance should be open circuit when the evaporator temperature is above 3 degrees Test 11 Ensure power is isolated before conducting this test 550 Series only Using a multi...

Страница 25: ...emove obstruction or clear evaporator NO YES Is the evaporator fan running Replace de ice thermostat Is the air flow obstructed Long periods of cold weather will result in poor recovery performance NO...

Страница 26: ...e heater of sufficient capacity for customers needs Recommend a water heater of sufficient capacity to meet needs NO YES NO 2 NO NO Is the heater connected to an off peak tariff YES The Heat Pump is n...

Страница 27: ...er at 48 50 degrees Depending on the length of pipe work and insulation to the fixture s water temperature can be lower due to heat loss Normal Operation Is the outlet water temp from the TLD approx 4...

Страница 28: ...r NO YES NO Is the leak from the element barrel fitting YES Check for loose element bolts Remove element and replace gasket NO YES Remove anode and repair leak using Teflon thread tape YES Is the corr...

Страница 29: ...r dishwasher Fit 600kPa pressure limiting valve YES Is the noise mechanical or air related Normal noise level during operation is approximately 59dB at 1 5 metres If this level is affecting neighbors...

Страница 30: ...wire and earth Disconnect the wiring to the compressor thermostat and the de ice thermostat and megger between each wire and earth Disconnect the wiring to the compressor thermostat and the evaporato...

Страница 31: ...r 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...

Страница 32: ...ak tariff NO Off peak connection is unsuitable for Heat Pump models Connect to continuous tariff or off peak 2 if available YES Is the isolating switch turned off NO Restore power and advise customer...

Страница 33: ...the terminal strip Normal resistance should be less than 1 ohm when the evaporator temperature is below 3 5 C degrees Test 14 Ensure power is isolated before conducting this test Heat Pump Mode Using...

Страница 34: ...tat 551275 A models Reset ECO thermostat Replace Robertshaw EWT1A1 2 thermostat YES Are the thermostat contacts closed YES Test 16 551275 models Test 16A 551275 A models Is the water in the tank at le...

Страница 35: ...the x1 resistance scale measure between terminals of the double pole ECO thermostat The reading should be less than 1 ohm Test 16 Ensure power is isolated before conducting this test 551275 models Us...

Страница 36: ...Normal resistance for the heating unit is 2 4kW 20 25 ohms 3 6kW 13 17 ohms Test 17A Ensure power is isolated before conducting this test 551275 A models Using a multimeter on the x1 resistance scale...

Страница 37: ...water heater 2 Relieve pressure from the water heater through the T PR valve or a hot tap 3 Remove the drain line from the T PR valve 4 Unscrew the T PR valve and remove A quantity of hot water will d...

Страница 38: ...the power supply Booster Thermostat Procedure 5 Personal Protective Equipment should be worn when conducting step 2 of this procedure to reduce the risk of electric shock Refer to Rheem Safety Proced...

Страница 39: ...ation 7 Replace screws and thermostat clamp and then tighten 8 Close T PR valve and open all hot taps Restore the cold water supply and purge air through hot taps close each hot tap as water runs free...

Страница 40: ...Protective Equipment should be worn when conducting step 2 of this procedure to reduce the risk of electric shock Refer to Rheem Safety Procedure on electrical testing 1 Isolate the power to the water...

Страница 41: ...ollowing procedures assume that all work conducted conforms to the refrigeration code of good practice During repair the refrigerant must be recovered not vented to atmosphere Evaporator Procedure 14...

Страница 42: ...Procedure 16 Personal Protective Equipment should be worn when conducting step 2 of this procedure to reduce the risk of electric shock Refer to Rheem Safety Procedure on electrical testing 1 Isolate...

Страница 43: ...ons Refrigeration System table on page 3 12 Restore power The refrigeration plant should commence operation 13 Refit air inlet louver and jacket top TX Valve Replacement Procedure 18 Personal Protecti...

Страница 44: ...e evaporator temperature 3 Remove the TX valve cap See diagram opposite 4 Using a 6mm Allan key back the TX valve adjuster screw all the way out Note The adjuster screw is recessed approximately 8mm r...

Страница 45: ...access cover Personal Protective Equipment should be worn when conducting step 2 to reduce the risk of electric shock Refer to Rheem Safety Procedure on electrical testing 2 Confirm with a multi mete...

Страница 46: ...5 Note The replacement filter drier is a soldered type some models have flared connections when fitting the replacement filter drier it will be necessary to cut the flares from the pipe work 11 Rechar...

Страница 47: ...OTC Thermostat Spring 180010 5 Compressor and Accumulator 180001 6 Evaporator Coil 180002 7 Jacket Refrigeration section 108363 8 Jacket Top Refrigeration section 140313 1 9 Shield Air outlet 104799 1...

Страница 48: ...al Reset 180013 4 OTC Thermostat Spring 180010 5 Compressor and Accumulator 180001 6 Evaporator Coil 180002 7 Jacket Refrigeration section 108363 8 Jacket Top Refrigeration section 140313 1 9 Shield A...

Страница 49: ...ist Item Description Part No Item Description Part No 1 Pipe Seal Inlet Outlet 221398 1 8 Anode Cover 221720 1 2 Fitting Liner Inlet 221001 9 Jacket Top 108361 3 Jacket Bottom 140313 1 10 Name Strip 1...

Страница 50: ...Service Instructions REV C Date of Issue 5 11 05 This document is stored and maintained electronically by Service All printed copies not bearing this statement in RED are deemed uncontrolled 49 Explo...

Страница 51: ...6 Cover Foam inlet 221735 Anode Black 221914 Anode Blue 221924 7 Anode Green 222024 8 Anode Cover 221720 1 9 Jacket Top 108361 10 Name Strip 120504 11 Pipe Seal T PR 221289 1 12 T PR Valve 220641 Ther...

Страница 52: ...S a Accidental damage to the water heater or component including Acts of God failure due to misuse incorrect installation attempts to repair the water heater other than by a Rheem Service Accredited S...

Страница 53: ...All printed copies not bearing this statement in RED are deemed uncontrolled 52 Document Revision History Title Service Instructions for Rheem Air Sourced Heat Pump Document Number TM017 Revision Deta...

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