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Related Manuals for Emerson Copeland Scroll ZR18K Series
Summary of Contents for Emerson Copeland Scroll ZR18K Series
- Page 1 Scroll compressors for air conditioning ZR18K* to ZR380K* ZP23K* to ZP385K*...
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Page 2: Table Of Contents
Safety instructions .................... 1 1.1 Icon explanation.........................1 1.2 Safety statements ......................1 1.3 General instructions ......................2 Product description ..................2 2.1 Common information about Copeland ScrollΠcompressors..........2 2.2 About this guideline......................2 2.3 Nomenclature........................2 2.4 Application range .......................3 2.4.1 Qualified refrigerants and oils ................3 2.4.2 Application limits.....................3 Installation ...................... - Page 3 5.3 Preliminary checks РPre-starting ..................15 5.4 Charging procedure ......................16 5.5 Rotation direction ......................16 5.6 Starting..........................16 5.7 Deep vacuum operation....................16 5.8 Shell temperature......................17 5.9 Pump down cycle......................17 5.10 Minimum run time ......................17 5.11 Shut-off sound........................17 5.12 Excessive liquid flood-back tests ..................17 Maintenance &...
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Page 4: Safety Instructions
Safety instructions Copeland ScrollŒ compressors are manufactured according to the latest European and US Safety Standards. Particular emphasis has been placed on the user’s safety. These compressors are intended for installation in systems according to the EC Machines directive. They may be put to service only if they have been installed in these systems according to instructions and conform to the corresponding provisions of legislation. -
Page 5: General Instructions
Common information about Copeland ScrollΠcompressors The Scroll compressor has been under development at Emerson Climate Technologies since 1979. It is the most efficient and durable compressor Emerson Climate Technologies has ever developed for air-conditioning and refrigeration. This application guideline deals with all vertical single Copeland ScrollΠcompressors for air conditioning and heat pump applications, from ZR18K* to ZR380K* and from ZP23K* to ZP385K*. -
Page 6: Application Range
*ARI-Conditions: Evaporating temperature 7.2°C Liquid sub-cooling 8.3 K Condensing temperature 54.4°C Ambient temperature 35°C Suction gas superheat 11 K Application range 2.4.1 Qualified refrigerants and oils IMPORTANT It is essential that the glide of refrigerant blends (primarily R407C) is carefully considered when adjusting pressure and superheat controls. Oil recharge values can be taken from Copeland ScrollŒ... -
Page 7: Installation
ZP154K* to ZP182K* ZP235K* to ZP385K* R410A R410A -30 -25 -20 -15 -35 -30 -25 -20 -15 -10 -5 10 15 20 25 ZP154 Evaporating Temperature to ( Evaporating Temperature to ( 10K Suction Superheat C Suction Gas Return Figure 2: Application envelopes for compressors ZP23K* to ZP385K* with R410A NOTE: For application envelopes with R134a and R22, please refer to Copeland®... -
Page 8: Installation Location
difficult. The copper coated steel suction tube should be cleaned before brazing. No object, eg, a swaging tool should be inserted deeper than 51 mm into the suction tube or it might damage the suction screen and motor. 3.1.3 Installation location Ensure the compressors are installed on a solid level base. -
Page 9: Shut-Off Valves And Adaptors
Copeland ScrollΠcompressors have copper-plated steel suction- and discharge tubes. These tubes are far more robust and less prone to leaks than copper tubes. Due to the different thermal properties of steel and copper, brazing procedures may have to be changed from those commonly used. -
Page 10: Accumulators
Copeland ScrollΠcompressors are delivered with a discharge check valve fitted inside the discharge port and rubber plugs fitted to the suction and discharge ports as standard. There are options to fit either Rotalock valves, or Rotalock adaptors or just make brazing connections. Braze connections can be converted to Rotalock by means of adaptors. -
Page 11: Mufflers
As a result, Emerson Climate Technologies recommends that the capacity rating on reversing valves be no more than 1.5 to 2 times the nominal capacity of the compressor in order to ensure proper operation of the reversing valve under all operating conditions. -
Page 12: Suction Line Noise And Vibration
The reversing valve solenoid should be wired so that the valve does not reverse when the system is shut off by the operating thermostat 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 13: Electrical Connection
Electrical connection General recommendations The compressor terminal box has a wiring diagram on the inside of its cover. Before connecting the compressor, ensure the supply voltage, the phases and the frequency match the nameplate data. Electrical installation The motor insulation material is class "B" (TF*) or "H" (TW*) for compressor models covered in this guideline. -
Page 14: Protection Devices
4.2.3 Protection devices Independently from the internal motor protection, fuses must be installed before the compressor. Selection of fuses has to be carried out according to VDE 0635, DIN 57635, IEC 269-1or EN 60- 269-1. 4.2.4 Crankcase heaters IMPORTANT Oil dilution! Bearing malfunction! Turn the crankcase heater on 12 hours before starting the compressor. -
Page 15: Discharge Temperature Protection
A cut-out setting not lower than 2 bar(g) for ZR Air Conditioning and 0.5 bar for ZR Heat Pump compressors is recommended. ZP R410A compressors should be set to 4.4 bar(g) and 2 bar(g) accordingly. Operation near a saturated suction temperature of -28°C, ie, 0.5 bar(g) for R407C and 2 bar(g) for R410A, is outside the approved operating envelope of the compressor. -
Page 16: Motor Protection
For compressors ZR250K* to ZR380K* and ZP235K* to ZP385K*, a thermistor is located in the discharge port of the fixed scroll. Excessive discharge temperature will cause the electronic protector module to trip. The discharge gas thermistor is wired in series with the motor thermistor chain. -
Page 17: Protector Functional Check And Failure Detection
Emerson Climate Technologies subjects all Scroll compressors to a high-voltage test after final assembly. Each motor phase winding is tested, according to EN 0530 or VDE 0530 part 1, at a differential voltage of 1000V plus twice the nominal voltage. -
Page 18: Starting Up & Operation
Starting up & operation WARNING Diesel effect! Compressor destruction! The mixture of air and oil at high temperature can lead to an explosion. Avoid operating with air. IMPORTANT Oil dilution! Bearing malfunction! Turn the crankcase heater on 12 hours before starting the compressor. Strength pressure test The compressor has been strength-tested in the factory. -
Page 19: Charging Procedure
Charging procedure Do not operate compressor without enough system charge to maintain at least 0.5 bar suction pressure. Do not operate with a restricted suction. Do not operate with the low-pressure cut-out bridged. Allowing pressure to drop below 0.5 bar for more than a few seconds may overheat scrolls and cause early drive bearing damage. -
Page 20: Shell Temperature
-12°C equivalent suction pressure below the lowest design operating point. 5.10 Minimum run time Emerson Climate Technologies recommends a maximum of 10 starts per hour. There is no minimum off time because scroll compressors start unloaded, even if the system has unbalanced pressures. -
Page 21: Maintenance & Repair
Review the results with Emerson Climate Technologies Application Engineering to determine if an accumulator is required or changes need to be made to the system. -
Page 22: Start-Up Of A New Or Replacement Compressor
Compressors supplied by Emerson Climate Technologies 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 23: Unbrazing System Components
If the moisture content of the oil in a refrigeration system reaches unacceptably high levels, corrosion and copper plating may occur. The system should be evacuated down to 0.3 mbar or lower. If there is uncertainty as to the moisture content in the system, an oil sample should be taken and tested for moisture.