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Related Manuals for Emerson Copeland Scroll ZH56 K4E ZH11 ME Series
Summary of Contents for Emerson Copeland Scroll ZH56 K4E ZH11 ME Series
- Page 1 Scroll compressors for Dedicated Heat Pumps ZH56 K4E...ZH11 ME...
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Page 2: Table Of Contents
™ ™ … … Introduction ................................2 Safety Instructions..............................2 Nomenclature...............................3 Qualified Refrigerant ............................3 Application Envelope ............................3 Lubrication................................4 Accumulators ...............................5 Crankcase Heaters ..............................5 Screens ................................5 Pump down ................................5 Discharge Temperature Protection ........................6 Low Ambient Cut-Out............................6 Pressure Controls ..............................6 Shut off Sound ..............................6 Starting.................................6 Deep-Vacuum Operation .............................6 Electrical Installation ............................6... -
Page 3: Introduction
Introduction The Scroll compressor has been under development at Copeland since 1979 and is the most efficient and durable compressor Copeland has ever developed for air-conditioning and refrigeration. Copeland has now invested significant resources and carried out extensive testing to optimize the complete range of ZH Scroll compressors for dedicated Heat Pump applications. -
Page 4: Nomenclature
Nomenclature The model numbers of Copeland Scroll™ compressors have been designed to include a coded nominal capacity at dedicated heat pump operating conditions. All heat pump scroll compressors are charged with Ester oil, which is indicated by the letter “E”. Model Designation Z H 56 K 4 E - T W D - 524 Z = Compressor family: Z = Scroll... -
Page 5: Lubrication
Lubrication The compressor is supplied with an initial charge of polyolester (POE) lubricant. In the field the oil level could be topped up with Mobil EAL Arctic 22 CC. The recharge values can be taken from Copeland Selection Software. Although there is no flexible mounting of the internal compressor parts, the number of start/stop cycles should be limited to 10 per hour. -
Page 6: Accumulators
Figure 3: Absorption of moisture in ester oil in comparison to mineral oil in [ppm] by weight at 25°C and 50% relative humidity. h = hours. Accumulators An accumulator is normally not required in dedicated heat pump applications. Durability is ensured by the Copeland Scroll’s inherent ability to handle liquid refrigerant in flooded start and defrost cycle operation. -
Page 7: Discharge Temperature Protection
11 Discharge Temperature Protection Internal discharge temperatures reached under some extreme operating conditions (such as loss of charge or extremely high compression ratio caused by failure of condenser fan) can cause compressor damage. In order to guarantee positive compressor protection the compressor is equipped with a thermistor located in the discharge port of the fixed scroll (Figure 6). -
Page 8: Electronic Motor Protection
motor protection module (INT69SCY) room thermostat fuse high-pressure switch low-pressure switch contactor crankcase heater auxiliary switch Solenoid valve for vapour injection Figure 7: Control Circuit 18 Electronic Motor Protection Protector Specifications : Type: Carel Voltage: 24 V AC; 230 V AC,120/240 V AC Control Rating: 60 VA, 25 A Inrush 300/375 VA 25/15 A Inrush Normal PTC resistance: 250 to 1000 Ohms... -
Page 9: Protector Functional Check And Failure Detection
The entire chain is internally led to the fusite from where it is connected to the module connections S1 and S2 (see Figure 9). When any resistance of the thermistor chain reaches the tripping value, the module interrupts the control line and causes the compressor to switch off. -
Page 10: High Potential Testing
20 High Potential Testing Copeland subjects all motor compressors to a high voltage test after final assembly. This is carried out according to IEC-34-1. Since high voltage tests lead to premature aging of the winding insulation we do not recommend additional tests of that nature. -
Page 11: Repeated Flood Back During Defrost
The system should be operated at an indoor temperature of 20°C and outdoor temperature extremes (-18°C or lower) which produce floodback conditions. The compressor suction and discharge pressures and temperatures should be recorded. The system should be allowed to frost up for several hours (disabling the defrost control and spraying water on the outdoor coil may be necessary) to cause the saturated suction temperature to fall to -30°C or below. -
Page 12: New Installations
25 New Installations The copper-coated steel tubes on scroll compressors can be brazed in approximately the same manner as any copper tube. Recommended brazing materials: Any silfos material is recommended, preferably with a minimum of 5% silver. However, 0% silver is acceptable. Be sure tube fitting inner diameter and tube outer diameter are clean prior to assembly. -
Page 13: Suction Line Noise And Vibration
pressure control connection gauge connection Figure 12: Shut-off valves and adapters 28 Suction Line Noise and Vibration Copeland Scroll compressors inherently have low sound and vibration characteristics. However, in some respects, the sound and vibration characteristics differ from reciprocating compressors and, in rare instances, could result in unexpected sound complaints. -
Page 14: Shell Temperature
29 Shell Temperature Under rare circumstances caused by failure of system components such as the condenser or evaporator fan, or loss of charge, and depending on the type of expansion control, the top shell and discharge line can briefly but repeatedly reach temperatures above 177°C as the compressor cycles on its internal protection devices. - Page 15 Notes...
- Page 16 Tel. +32 (0) 87 305411 - Fax +32 (0) 87 305506 - internet: www.ecopeland.com - email: eCommerce@eCopeland.com The Emerson logo is a trademark and service mark of Emerson Electric Co. Copeland Corporation is a division of Emerson Electric Co. Copeland is a registered trademark and Copeland Scroll is a trademark of Copeland Corporation.