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Related Manuals for Emerson Copeland Scroll YHV 2P Series
Summary of Contents for Emerson Copeland Scroll YHV 2P Series
- Page 1 Application Guidelines Copeland Scroll ™ Variable Speed Compressors YHV0182P* to YHV0382P*...
- Page 2 About these guidelines ....................1 Safety instructions .................... 1 1.1 Icon explanation ......................... 1 1.2 Safety statements ......................2 1.3 General instructions ......................2 Product description ..................3 2.1 General information about Copeland Scroll™ compressors ..........3 2.2 Variable speed advantages ....................4 2.3 Compressor and drive nomenclature .................
- Page 3 4.4.2 Low-pressure protection ..................22 4.5 Discharge gas temperature protection ................22 4.6 High-potential testing ....................... 23 Start-up & operation ..................24 5.1 Strength pressure test ...................... 24 5.1.1 Compressor strength-pressure test ..............24 5.1.2 System strength-pressure test ................24 5.2 Compressor tightness test ....................
- Page 4 The purpose of these guidelines is to provide guidance in the application of Copeland Scroll™ compressors and Emerson motor control drives in users’ systems. They are intended to answer the questions raised while designing, assembling and operating a system with these products.
- Page 5 Safety statements ▪ Refrigerant compressors must be employed only for their intended use. The system has to be labelled according to the applicable standards and legislation. ▪ Only qualified and authorized RACHP personnel are permitted to install commission and maintain this equipment. Only competent personnel (as specified in EN 13313) qualified for flammable refrigerant handling is permitted to commission, initiate and maintain the compressor/refrigeration systems;...
- Page 6 Product description General information about Copeland Scroll™ compressors The Scroll compressor has been under development at Emerson since 1979. It is the most efficient and durable compressor Emerson has ever developed for air conditioning, refrigeration and heating applications. These application guidelines deal with the YHV*2P variable speed Copeland Scroll compressors for use with R452B and R454B.
- Page 7 NOTE: For the latest list of matched pairs ED3 with YHV*2P please refer to the ED3 User Manual (June 2019 version) or contact the Application Engineering department at Emerson. Variable speed advantages The variable speed scroll is a key component in the variable capacity system. A variable capacity...
- Page 8 Figure 3: Compressor nomenclature Application considerations 2.4.1 Qualified refrigerant and oil Oil recharge values can be taken from Copeland Scroll compressors brochures or Copeland™ brand products Select software available at www.climate.emerson.com/en-gb. Compressors YHV0182P, YHV0252P, YHV0382P Qualified refrigerant R452B and R454B...
- Page 9 5 K is required. In the same way, the superheat at the compressor suction must always stay below a maximum limit specified by Emerson, depending on the model and for which the operating envelope is defined.
- Page 10 Figure 4: Application envelope for YHV0182P-9E9 using R452B and R454B Figure 5: Application envelope for YHV0252P-9E9 using R452B and R454B AGL_HP_VS_YHV2P_E_Rev0...
- Page 11 YHV0382P-4X9 No drive limitation YHV0382P-4X9 + ED3018B Legend (rpm) (rpm) 1200 1200 1800 1800 2400-5400 2400-4500 2400-7200 Linear interpolation Linear interpolation 2400-5400 Linear interpolation 2400-7200 Figure 6: Application envelope and legend for YHV0382P-4E9 using R452B and R454B YHV0382P-9X9 No drive limitation YHV0382P-9X9 + ED3020A Legend (rpm)
- Page 12 Running outside the envelope is not allowed. Emerson’s recommendation is to start with a speed of 3000 rpm and to freeze the speed for minimum 30 seconds or longer until the system is in stable operation – see Figure 8 "Ramp up".
- Page 13 For oil return the exact parameters for an oil recovery cycle need to be evaluated for each system by oil return tests, as they may differ depending on system application. Please contact and review with Application Engineering at Emerson for any desired changes to this oil recovery cycle requirements. AGL_HP_VS_YHV2P_E_Rev0...
- Page 14 Dimensions The external dimensions of YHV*2P compressors are shown in Figures 10 & 11 below. Figure 10: External dimensions of compressor models YHV0182P and YHV0252P Figure 11: External dimensions of compressors YHV0382P AGL_HP_VS_YHV2P_E_Rev0...
- Page 15 Installation WARNING High pressure! Injury to skin and eyes possible! Be careful when opening connections on a pressurized item. Compressor and drive handling WARNING Static electricity! Personal injuries! Personnel handling the drives in a manufacturing plant environment should guard against static electricity by using the appropriate equipment - antistatic wrist straps and mats.
- Page 16 3.1.4 Compressor mounting parts The compressors are designed to be mounted on vibration absorber grommets (part of the standard delivery). The grommets dampen the start-up surge of the compressor and minimise sound and vibration transmission to the compressor base during operation. The metal sleeve inside is a guide designed to hold the grommet in place.
- Page 17 ▪ Heat area 2 until braze temperature is attained, moving the torch up and down and rotating around the tube as necessary to heat the tube evenly. Add braze material to the joint while moving the torch around the joint to flow braze material around the circumference. ▪...
- Page 18 15 cm. Sound shell No sound shell attenuation for YHV*2P compressors is available from Emerson at this time. If a sound shell is still needed, particular attention shall be paid to the electrostatic charge of the insulation material, which could be a potential ignition source.
- Page 19 capacity of the compressor in order to ensure proper operation of the reversing valve under all operating conditions. The reversing solenoid valve should be wired so that the valve does not reverse when the system is shut off by the system controller in the heating or cooling mode. If the valve is allowed to reverse at system shut off, suction and discharge pressures are reversed to the compressor.
- Page 20 For safety reasons, Emerson recommends that the electrical installation be executed in compliance with standard EN 60204-1 and/or other standards and regulations of application when dealing with A2L refrigerants.
- Page 21 Observing that suction pressure drops and discharge pressure rises when the compressor is energized allows verification of proper rotation direction. There is no negative impact on durability caused by operating variable speed scroll compressors in the reversed direction for a short period of time (maximum one hour) but oil may be lost.
- Page 22 Figure 19: Tab detail - Connection dimensions in inches [mm] Wiring diagrams WARNING Ignition source in a potentially flammable atmosphere! Fire hazard! Any work on the energized terminals in the compressor terminal box could create an ignition. Do not touch the energized terminals with a tool or cable when the compressor is energized WARNING High voltage! Electrical shock hazard! Serious personal injuries!
- Page 23 For the single-phase matched pairs of YHV*2P with ED3 drive, the following circuit diagrams can be used: Power circuit Control circuit Legend B1 ..System controller F4 ..LP switch Q1 ..Main switch K2 ..Contactor (optional)* D ..Drive assembly RCD ..
- Page 24 Emerson. NOTE: At first start, the crankcase heating function must be turned on a minimum of 12 hours prior to starting the compressor.
- Page 25 NOTE: For detailed specifications and instructions to connect the high-pressure limiter to the drive, please refer to the ED3 User Manual (June 2019 version). 4.4.2 Low-pressure protection WARNING Operation under ambient pressure! Fire hazard! During operation under ambient pressure, a flammable mixture can form inside the system. Make sure that air does not enter the system.
- Page 26 Emerson subjects all scroll compressors to a high-voltage test after final assembly. Each motor phase winding is tested according to EN 60034-1 at a differential voltage of 1000 V plus twice the nominal voltage.
- Page 27 DO NOT USE other industrial gases. 5.1.1 Compressor strength-pressure test The compressor has been strength-pressure tested in the Emerson factory. It is not necessary for the customer to strength-pressure test the compressor another time. The scroll compressors are divided into two pressure zones. The compressor high-side and low side PS (maximum allowable pressure) have to be respected at any time.
- Page 28 Any modification to compressor connections can have an impact on the compressor tightness. Always leak-pressure test the compressor after opening the system or modifying the connections. If using dry air do not include the compressor in the leak test – isolate it first. Never add refrigerant to the test gas (as leak indicator).
- Page 29 Therefor users should be aware that before the performance specified by EN 12900 is achieved the compressor needs to be run in. For YHV*2P compressors it is recommended to run the break in at 2400 rpm, +7 °C evaporating temperature and 55 °C condensing temperature with a superheat of 10 K for a period of 16 h. Initial start-up CAUTION Oil dilution! Bearing and moving parts malfunction! It is important to...
- Page 30 (available from Emerson) and install it in a system with the longest connecting lines that are approved for the system. The minimum on time becomes the time required for oil lost during compressor start-up to return to the compressor sump and restore a minimal oil level that will ensure oil pick-up through the crankshaft.
- Page 31 During the system development phase, adequate oil return from the system to the compressor should be evaluated and qualified. For this purpose, a sample compressor for lab testing, equipped with an external oil sight tube, is available from Emerson. AGL_HP_VS_YHV2P_E_Rev0...
- Page 32 Maintenance & repair WARNING Conductor cables! Electrical shock! Follow the lockout/tag out procedure and the national regulations before carrying out any maintenance or service work on the system. Use compressor with grounded system only. Screwed electrical connections must be used in all applications. Refer to original equipment wiring diagrams. Electrical connections must be made by qualified electrical personnel.
- Page 33 Preparation and working procedure A working procedure shall be provided in the preparation stage. All maintenance personnel and other staff working at the site shall be instructed of the nature of the work being carried out. If any work is to be conducted on the refrigeration systems or any associated parts, appropriate fire extinguishing equipment shall be provided.
- Page 34 Exchanging the refrigerant WARNING Air/A2L mixture! Flammable and explosive atmosphere! Fire and explosion hazard! In any case avoid air/A2L mixture in the refrigeration system. Make sure that the system is filled with pure A2L refrigerant. In the event that the refrigerant needs replacing, the charge should be recovered using A2L qualified refrigerant recovery unit and recycling bottles.
- Page 35 A minimum suction pressure, specified by the published operating envelope, must be maintained during charging. Allowing the suction pressure to drop below that value may overheat the scrolls and cause early drive bearing and moving parts damage. Never install a system in the field and leave it unattended when it has no charge, a holding charge, or with the service valves closed without securely electrically locking out the system.
- Page 36 Since POE holds moisture more readily than mineral oil it is more difficult to remove it through the use of vacuum. Compressors supplied by Emerson contain oil with low moisture content, and it may rise during the system assembling process. Therefore, it is recommended that a properly sized filter-drier is installed in all POE systems.
- Page 37 Troubleshooting Most in-warranty electrical failures are the result of mechanical problems (particles in the oil, liquid refrigerant in the oil, etc.) and most mechanical problems are the result of system problems. Unless the reason for the failure is found, replacing the compressor will probably lead to another compressor failure.
- Page 38 Condition Cause Corrective action ▪ Acid formation: Acid forms in the presence of moisture, oxygen, metal, salts, metal oxides and/or high discharge temperatures. The chemical reactions are accelerated at higher temperatures. The Scroll Internal Oil and acid react with each other. Acid formation compressor does compressor leads to damage of the moving parts and in...
- Page 39 Too high Make sure the compressor operates within the compressor acceptable superheat range published by Emerson. superheat Excessive cooling/heating Check the load design; make sure that proper load or insulation is applied.
- Page 40 3. Emerson does not assume responsibility for the selection, use or maintenance of any product. Responsibility for proper selection, use and maintenance of any Emerson product remains solely with the purchaser or end user.
- Page 41 The Emerson logo is a trademark and service mark of Emerson Electric Co. Emerson Climate Technologies Inc. is a subsidiary of Emerson Electric Co. Copeland is a registered trademark and Copeland Scroll is a trademark of Emerson Climate Technologies Inc.. All other trademarks are property of their respective owners.