Danfoss VRJ Application Manuallines Download

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Danfoss Inverter scroll
compressor,

VRJ

For Residential Applications - R410A

Application Guidelines

http://danfoss.us.com/

Summary of Contents for VRJ

Page 1: ...Danfoss Inverter scroll compressor VRJ For Residential Applications R410A Application Guidelines http danfoss us com...

Page 2: ......

Page 3: ...pply 11 Compressor ambient temperature 11 Application envelope 12 High and low pressure protection 13 Crankcase heating 13 Oil return management 13 On off cycling cycle rate limit 14 Start up sequence...

Page 4: ...lect a compressor size that achieves the peak load system cooling capacity demand at its maximum speed Nominal cooling capacity select a compressor size that achieves the nominal system cooling capaci...

Page 5: ...git serial number 12345678 A 25 B Plant assembly line code Month code Application Family refrigerant V Variable speed R Residential J R410A PVE lubricant Swept Volume Displacement in cc rev Model Vari...

Page 6: ...ompressor isentropic efficiency rpm Hz Btu hr Ton High SEER conditions H VRJ028 3 Tons 3600 60 36700 3 06 66 2 4200 70 42700 3 56 64 9 VRJ035 4 Tons 3600 60 46400 3 87 67 6 4200 70 53400 4 45 65 1 VRJ...

Page 7: ...1 161 5 16 18 UNC self tapping Recommended torque for mounting bolts 8 ft lbs 1ft lbs 0 433 9 40 4 x 0 75 0 78 3 750 5 06 4 38 2 74 2 80 34 31 45 14 4 32 3 750 7 491 7 509 9 40 7 491 7 509 15 53 Suct...

Page 8: ...ording to UL requirements With VRJ compressors the LRA value is low because the variable speed drive reacts very rapidly far below 1 second The MCC value is the maximum at which the compressor can be...

Page 9: ...ion will be not possible If compressor and drive T1 T2 and T3 terminals are not matching the compressor can go in reverse rotation This results in excessive noise no pressure differential between suct...

Page 10: ...ive 97 23 EC Low voltage directive 73 23 EC 93 68 EC Internal free volume Manufacturer s declaration of incorporation ref EC Machines Directives 98 392 CE Contact Danfoss Products Internal free volume...

Page 11: ...bricant provides the best possible result in terms of reliability and compressor lifetime Although the compressor itself can withstand low ambient temperature the system may require specific design fe...

Page 12: ...controller software s The discharge temperature depends mainly on the combination of evaporating temperature condensing temperature and suction gas superheat and speed Discharge gas temperature should...

Page 13: ...y switch loss of charge safety switch setting is given in the above table Either the LP safety switch must be a manual lockout device or an automatic switch wired into an electrical lockout circuit Th...

Page 14: ...arts VRJ compressors start with a defined ramp up and stay at a fixed speed for some seconds Then the compressor speed increases up to the desired set point according to capacity request On off cyclin...

Page 15: ...ide of the compressor during off cycle The upper loop also helps avoid condensed liquid refrigerant from draining back to the compressor when stopped see fig 2 The maximum elevation difference between...

Page 16: ...ronic expansion valve for all air conditioning and heat pump applications with VRJ compressors An EXV has two key benefits it provides modulating control of the system under varying load conditions an...

Page 17: ...onnected to the drive Water utilising systems Apart from residual moisture in the system after commissioning water could also enter the refrigeration circuit during operation Water in the system shall...

Page 18: ...long the parts of the unit and structure Gas pulsation This tends to travel through the cooling medium i e the refrigerant The following sections will focus on the causes and methods of mitigation for...

Page 19: ...constitutes the primary method for controlling structural vibration VRJ scroll compressors are designed to produce minimal vibration during operations The use of rubber isolators on the compressor ba...

Page 20: ...ust be taken never drill holes into the pipe work after installation Compressors are provided with a lifting lug This lug should always be used to lift the compressor Once the compressor is installed...

Page 21: ...lux is acidic and can cause substantial damage to the internal parts of the system and compressor The PVE oil used in VRJ compressors is highly hygroscopic and will rapidly absorb moisture from the ai...

Page 22: ...sulation resistance must be greater than 1 megohm when measured with a 500 volt direct current megohm tester Each compressor motor is tested at the factory with a high potential voltage hi pot that ex...

Page 23: ...ping US thread bolts washers and sleeves Industrial pack Ordering code numbers Compressors are not packed individually but are shipped all together on one pallet They can be ordered in quantities of f...

Page 24: ...nd positioned us as distinct variable speed technology specialists Today we operate from engineering and manufacturing facilities spread across three continents Danfoss Inverter Scrolls Danfoss Turboc...