Panasonic 4CW056MA01 Applications Manual

Horizontal scroll compressors


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Horizontal Scroll Compressors
Application Manual
Panasonic Appliances Compressor (Dalian) Co., Ltd.


Table of Contents

Summary of Contents for Panasonic 4CW056MA01

  • Page 1 Horizontal Scroll Compressors Application Manual Panasonic Appliances Compressor (Dalian) Co., Ltd. Ver.202203...
  • Page 2: Table Of Contents

    TABLE OF CONTENTS Safety Instructions ............................1 1.0 Structure and Operating Characteristics ..................... 2 1.1 Key Components ............................ 2 1.2 Scroll Compressor Operating Characteristics ..................2 1.3 Compressor Design Pressure ........................3 1.4 Refrigerant Oil ............................3 1.5 Compressor Models and Motor Type ..................... 4 2.0 Refrigerating Circuit Design Considerations ....................
  • Page 3 3.10 Avoid low compression ratio conditions ..................... 14 3.11 On/off cycle ............................14 3.12 Rotation direction of compressor......................14 3.13 Deep vacuum Operation ........................14 3.14 Caution on pump down operation ....................... 15 3.15 Protection Devices Required ......................15 4. 0 Assembly and Manufacturing Process Considerations ................17 4.1 Removing Rubber Plug ........................
  • Page 4: Safety Instructions

    Safety Instructions Panasonic scroll compressor meets strict safety and operating standards. As the installer or service person, it is an important part of your job to read this instruction carefully before beginning. ●Make sure the unit utilize grounded connection. ELECTRICAL ●Disconnect all input power before servicing.
  • Page 5: Structure And Operating Characteristics

    See a cutaway view of C-SW series compressor in Figure1-1. 1.2 Scroll Compressor Operating Characteristics Panasonic C-SW series scroll compressors are designed with fixed eccentric and floating orbit scroll sealing, resulting in low sound level and minimal gas leakage and therefore excellent efficiency.
  • Page 6: Compressor Design Pressure

    First Orbit: SUCTION Second Orbit: COMPRESSION Third Orbit: DISCHARGE Figure 1-2 Compression Process 1.3 Compressor Design Pressure The compressor’s design pressure is shown in Table 1-1. The operating pressure in the system shall be lower than compressor design pressure. Table 1-1 Compressor Design Pressure Refrigerant High Pressure Side MPa(G)/psig R407C/R134a/R513A...
  • Page 7: Compressor Models And Motor Type

    4) Rust proof. 1.5 Compressor Models and Motor Type Panasonic C-SW series horizontal scroll compressors are designed for variable speed operation. A three phase, Induction type motor or a brushless permanent magnet motor is applied in this series. The inverter compressor shall only be connected to specific inverter driver produced for this compressor.
  • Page 8: Refrigerating Circuit Design Considerations

    2.0 Refrigerating Circuit Design Considerations 2.1 Condensing Pressure and Evaporating Pressure The recommended condensing pressure and evaporating pressure for R407C systems at standard conditions are shown in the table 2-1: Table 2-1 Recommended condensing and evaporating pressure Pressure Cooling High side MPa(G) 1.85~1.90 Low side...
  • Page 9: Discharge Temperature

    2.3 Discharge Temperature Panasonic C-SW series compressor is with high pressure shell structure. Motor is cooled down by discharge gas. The discharge temperature shall be controlled lower than the limitation in the compressor specification.
  • Page 10: Discharge Line Check Valve

    In this case the use of oil separator will give a notable improvement for system performance; 3) Panasonic horizontal scroll compressors are designed with high pressure shell, the oil return pipe should go through capillary tube and connect with suction tube (before the suction accumulator) ;...
  • Page 11: System Charge Limit

    When the oil is foamed, do not consider the foaming portion as oil level. Low oil level will cause lack of lubrication to rotating parts and seriously affect the compressor reliability. Observe the oil level with the compressor with sight glass supplied by Panasonic, and consult your account representative for the result.
  • Page 12: Pipe Surface Stress

    2.14 Pipe surface stress The stress of pipes connecting the compressor and other parts of the refrigeration systems, shall not be more than 12.26MPa when the compressor is operating, and shall not be more than 34.32MPa during 'start - stop'. 2.15 Allowable incline The allowable incline shall not be more than 10°during operation.
  • Page 13: Electrical Parts And Controller Design Considerations

    3.0 Electrical Parts and Controller Design Considerations 3.1 Selection of Electrical Wiring Voltage drop may occur due to the large current draw during compressor starting. The starting failure will occur if the starting voltage is under the range of compressor specifications. So it is necessary to select the proper size of electrical wire.
  • Page 14 3.1.2 Selection of Electrical Wiring The recommended wiring size is shown in the table 3-1. Power Type of Unit ① ① Power source Window & Commercial Type Unit terminal ③ ③ compressor compresso terminal plate indoor indoor Split Type (Separate Type) ②...
  • Page 15: Selection Of Inverter Driver

    3.2 Selection of Inverter Driver The function of inverter driver is to power the compressor, control the compressor running speed, protect compressor from abnormal situations and communicate with master controller. Make sure to choose a suitable quality inverter driver which have been passing performance test with compressor.
  • Page 16: Stopping Of Compressor

    After the rotation speed attained at 50~70rps, it is necessary to keep the speed for one minute. Because it is to prevent the oil lack to sliding portion by oil level down at compressor-start. To check oil return, perform a test using a sight glass compressor supplied by us.
  • Page 17: Avoid Low Compression Ratio Conditions

    1) Compressor speed ≤30rps , for more than 1 hour continuous operation; 2) 30rps< compressor speed ≤40rps, for more than 4 hours continuous operation; 3) Compressor speed ≥75rps , for more than 40 minutes continuous operation; This recommendation is to keep the safe oil level inside of compressor and make sure the sufficient lubrication, 3.10 Avoid low compression ratio conditions Compressor internal oil supply depends on internal oil pump and the rotation speed, do not run the compressor in the low compression ratio conditions with lower speed (especially 30~39rps).
  • Page 18: Caution On Pump Down Operation

    115℃. Figure 3-5 Discharge Thermostat Installation 3) Low Pressure Switch Panasonic scroll compressors require a low-pressure switch to protect against loss of refrigerant conditions. The recommended settings are listed in Table 3-2.
  • Page 19 Panasonic recommends crankcase heaters should be used for the system with high refrigerant charge volume. The crankcase heater of suitable power should remain the temperature of compressor bottom shell 11K higher than ambient temperature or reduce the oil level to specified level after 5 hours energizing.
  • Page 20: Assembly And Manufacturing Process Considerations

    The mounting accessories (grommets and sleeves) that are supplied or specified by Dalian Panasonic should be used, as shown in Figure 4-1. The upper mounting rubber(rubber1) can reduce the up-down motion of compressor under vibration and shock conditions;...
  • Page 21: Tube Brazing

    4.4 Tube Brazing During brazing the system piping to the compressor, it is important to maintain the cleanliness inside the piping to prevent water, solid contamination and so on entering into the system. Do not bend the discharge or suction lines or force the piping into the compressor connections since this may increase piping stress and potential failure.
  • Page 22 4.4.3 The clearance and Insertion length of brazing parts (reference) The recommended clearance and minimum insertion length of copper pipes are shown in the Table 4-2. Table 4-2 The clearance and length Piping Minimum Insertion Clearance O.D.(mm) Length L1 (mm) D-d (mm) 0.05~0.35 8~12...
  • Page 23: Leakage Test

    4.8 Wiring Connections PANASONIC scroll compressors will only compress gas in the counterclockwise direction when viewed from the top. Since single phase motors start and run in only one direction, reverse rotation is not a major consideration.
  • Page 24: Terminal Cover And Clip

    direction. Verification of proper rotation is done by observing suction and discharge pressures when the compressor is operating. A decrease in discharge pressure and an increase in suction pressure indicate reverse rotation. In order to correct this situation, disconnect the power and switch any two power leads at the unit contactor. NEVER switch leads directly at the compressor.
  • Page 25: Preliminary Running

    Figure 4-5 4.10 Preliminary Running In order to lubricate the compressor movement parts, the compressor should be operated at least 3 seconds within 15min after refrigerant charged. Check the following items: 1) To check whether abnormal sound or abnormal tube vibration occurs. 2) To check whether refrigerant leaks from the connection part.
  • Page 26 deviation from current published specifications occurs (+/-15% or more) this may indicate a defective compressor. 4.12.2 System Evacuation When evacuating a compressor in the field, it is extremely important to use a vacuum manifold set with at least 2 vacuum lines connected to the system. One line connected to the high side and the other connected to the low side of the system.
  • Page 27: Other Precautions

    8) Heat the joint uniformly by moving the torch around the joint to flow braze material evenly around the circumference. 9) Slowly move the torch to area 3 to draw the braze material into the joint. 10) Do not overheat the joint. A cherry red color indicates overheating and can weaken the joint and fittings. 4.12.5 Compressor Replacement for Motor Burn Out If a motor burn out is present, follow the procedure as below: 1) Evacuate the system per section 4.12.2.
  • Page 28: Troubleshooting

    5. 0 Troubleshooting Problem Check Point Probable Causes Power source switch off Power source Fuse blown Too low voltage at compressor terminals Wiring Disconnection of wiring Improper setting of temperature controller Protection devices trip (Discharge temp. High-Low pressure Compressor Switch etc.) Control devices failure to start Loss of Phase...
  • Page 29 Problem Check Point Probable Causes During off cycle, liquid refrigerant migrates to the compressor and Flooded-start mixed with lubricant oil Refrigerant overcharged Piping Resonance vibration occurs Electromagnetic noise of motor Abnormal running noise Lack of oil in the compressor Worn or broken components inside of compressor Compressor Contaminations mix in compressor Reverse rotation of compressor...

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