Emerson Copeland Scroll ZH56 K4E ZH11 ME Series Application Manuallines Download | Manualshive

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Scroll compressors for
Dedicated Heat Pumps

ZH56 K4E...ZH11 ME

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Summary of Contents for Copeland Scroll ZH56 K4E ZH11 ME Series

Page 1: ...Scroll compressors for Dedicated Heat Pumps ZH56 K4E ZH11 ME Application Guidelines ...

Page 2: ...nt Cut Out 6 13 Pressure Controls 6 14 Shut off Sound 6 15 Starting 6 16 Deep Vacuum Operation 6 17 Electrical Installation 6 18 Electronic Motor Protection 7 19 Protector Functional Check and Failure Detection 8 20 High Potential Testing 9 21 Compressor Functional Check 9 22 Excessive Liquid Floodback 9 22 1 Continuous Floodback 9 22 2 Repeated Flood back during Defrost 10 23 Installation 10 24 S...

Page 3: ... start the compressor until it is charged with refrigerant Correctly used the compressor and the pressure line piping may reach temperatures that may cause burning if touched Wear safety goggles when working on open systems If the refrigerant needs to be removed from the system do not disperse it in the environment use the correct equipment method of removal For storage use original packaging and ...

Page 4: ... 524 1 2 3 4 5 6 7 8 1 Z Compressor family Z Scroll 2 H Dedicated heat pump compressor 3 Nominal heating capacity kW 50 Hz and 7 C evaporating 50 C condensing using multiplier 1 3rd 4 Nominal heating capacity multiplier K 1 M 10 5 Model variation 6 POE Oil 7 Motor version 8 Bill of Material 4 Qualified Refrigerant R407C has been qualified for the compressor models ZH56K4E ZH11ME 5 Application Enve...

Page 5: ...l temperature tb One characteristic of POE is that it is far more hygroscopic than mineral oil Figure 3 Only brief exposure to ambient air is needed for POE to absorb sufficient moisture to make it unacceptable for use in a refrigeration system Since POE retains moisture chemically it is not possible to completely remove it through the use of vacuum Compressors supplied by Copeland contain oil wit...

Page 6: ...grating into the shell during standstill periods It is recommended to fit a CCH if the compressor is located outside the building the system charge is above the limits shown For correct mounting location of a CCH please see Figure 5 Fig 5 Crankcase heater location 9 Screens The use of screens finer than 30 x 30 mesh 0 6 mm openings anywhere in the system is not recommended Field experience has sho...

Page 7: ...e tube of the compressor prevents high pressure gas entering the compressor after shut down Additionally there is a dynamic discharge valve mounted on the fixed Scroll which effectively eliminates reverse rotation 15 Starting During the very brief start up a short metallic sound is audible resulting from initial contacting of the spirals and is normal Due to the design of the Copeland Scroll the i...

Page 8: ...series is embedded in the motor windings so that the temperature of the thermistors can follow the winding temperature with little inertia An electronic module is required to process the resistance values and trip a control relay depending on the thermistor resistance The characteristic gradient of a thermistor resistance curve is shown in Figure 8 The resistance curve can be designed for differen...

Page 9: ...onnected and measured between the leads Resistance must be between 150 and 1250 ohms If the thermistor chain has a higher resistance 2750 Ohms or greater the motor temperature is still too high and it has to be allowed to cool If the resistor is 0 Ohms the compressor has to be exchanged due to shorted sensor circuit Ohms indicates an open sensor circuit and the compressor has to be replaced If no ...

Page 10: ... configuration and the system high potential tested again 21 Compressor Functional Check It is not desirable to perform functional compressor tests where the compressor is turned on with the suction service valve closed to check how low the compressor will pull suction pressure Rather the following diagnostic procedure should be used to evaluate whether the Copeland Scroll compressor is functionin...

Page 11: ...f the liquid in the compressor during each cycle any protector trips or any compressor stalls during each test Review all test results with Copeland Application Engineering to determine if an accumulator is required for the application 23 Installation Four vibration absorber grommets are supplied with each compressor see Figure 10 They dampen the start up surge of the compressor and prevent sounds...

Page 12: ... joint areas 2 and 3 slowly and uniformly until the braze material softens and the tube can be pulled out of the fitting To reconnect Recommended brazing materials Silfos with minimum 5 silver or silver braze used on other compressors Due to the different thermal properties of steel and copper brazing procedures may have to be changed from those commonly used For brazing of the tubes see Figure 11...

Page 13: ...ion line into a house under some conditions Elimination of the beat can be achieved by attenuating either of the contributing frequencies This is easily done by using one of the common combinations of design configuration described below A second difference of the Copeland Scroll compressor is that under some conditions the normal starting motion of the compressor can transmit an impact noise alon...

Page 14: ...hell and suction line tubing pressurised If a brazing torch is then applied to the low side while the low side shell and suction line contains pressure the pressurised refrigerant and oil mixture could ignite when it escapes and contacts the brazing flame To prevent this occurrence it is important to check both the high and low side with manifold gauges before unbrazing Instructions should be prov...

Page 15: ...Notes ...

Page 16: ...a D 63477 Maintal P 02 673 Warszawa Tel 49 0 6109 6059 0 Tel 48 225 458 9205 Fax 49 0 6109 6059 40 Fax 48 225 458 9255 France Greece Maghreb Russia CIS 8 Allee Du Moulin Berger Malaya Trubetskaya 8 11th Floor F 69130 Ecully RUS 119881 Moscow Tel 33 0 4 78668570 Tel 7 095 232 94 72 Fax 33 0 4 78668571 Fax 7 095 232 03 56 Italia Middle East Africa Via Ramazzotti 26 PO Box 26382 R A 8 FD 2 I 21047 Sa...

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