Related Manuals for Danfoss VRJ
Summary of Contents for Danfoss VRJ
- Page 1 Application Guidelines Danfoss Inverter scroll compressor, VRJ For Residential Applications - R410A http://danfoss.us.com/...
-
Page 3: Table Of Contents
Bearings lubrication ............6 Stopping sound level ............18 Dimensions ............ 7 Sound generation in a refrigeration system and air VRJ 028 - 035 - 044 .............7 conditioning system ............18 Mounting grommet ............7 Installation ............ 20 Electrical data, connections and wiring ..8 System cleanliness ............20... -
Page 4: Introduction
• Best Seasonal E ciency Ratio: select a compressor size that achieves the minimum Performance The Danfoss VRJ compressors referenced in this A seventy-two hour run-in is recommended to guide is a fully compliant scroll and actually meet performance expectations. -
Page 5: Compressor Model Designation
Compressor model designation Application Guidelines Application, Swept Model Voltage Motor Equipment Other Nomenclature Family Volume Variation Protection Version Features & Refrigerant Application, Family Other features & refrigerant 6: No other features V: Variable speed Equipment version R: Residential P: Brased connections, J: R410A, PVE lubricant spade terminals Motor protection... -
Page 6: Technical Speci Cations
(I) Variable speed drive For dedicated variable speed drive speci cations, speci cations refer to “Danfoss VRJ Installation and Operation instructions”. Bearings lubrication A speci c oil pump ensures optimal bearing as avoid excessive Oil Circulation Ratio (OCR) at lubrication at all compressor speeds. -
Page 7: Dimensions
Application Guidelines Dimensions 9.40 VRJ 028 - 035 - 044 7.491 - 7.509 4 x Ø 0.75 - 0.78 3.750 5.06 3.750 4.32 9.40 7.491 - 7.509 4.38 14° 34° 31° 2.74 - 2.80 45° 6.438 - 6.515 Discharge port 1/2”... -
Page 8: Electrical Data, Connections And Wiring
0.254 LRA (Locked Rotor Amp) LRA is the higher average current as measured VRJ compressors, the LRA value is low because the on a mechanically blocked compressor tested variable speed drive reacts very rapidly (far below under nominal voltage. LRA is printed on the 1 second). -
Page 9: Wiring Connections
Application Guidelines Electrical data, connections and wiring Wiring connections VRJ scroll compressors will only compress gas while rotating counter-clockwise (when viewed from the compressor top). The drawing shows electrical terminal labelling and should be used as a reference when wiring the compressor. -
Page 10: Approvals And Certi Cates
Application Guidelines Approvals and certificates Approval and certi cates VRJ scroll compressors comply with the following approvals and certi cates. All models (Underwriters Laboratories) Other approvals / certi cates Contact Danfoss Pressure equipment Refrigerating uids Group 2 directive 97/23/EC Category PED... -
Page 11: Operating Conditions
Polyvinyl ether (PVE) is an innovative refrigeration The compressor technology applied in Danfoss lubricant for HFC refrigerant systems. PVE is as VRJ scroll compressors in combination with PVE hygroscopic as existing polyolester lubricants lubricant provides the best possible result in (POE), but PVE does not chemically react with terms of reliability and compressor lifetime. -
Page 12: Application Envelope
900 - 4500 RPM Saturated evaporating temp. (°F) Maximum discharge gas The discharge temperature depends mainly on Refer to “Danfoss VRJ Installation and Operation temperature the combination of evaporating temperature, instructions” for connection details, and to condensing temperature and suction gas “Sensor Selection Guideline”... -
Page 13: High And Low Pressure Protection
Application Guidelines Operating conditions High and low pressure Suction and discharge pressure transmitters have Refer to “Danfoss VRJ Installation and Operation protection to be installed and connected to the variable instructions” for connection details, and to speed drive to ensure the compressor operates “Sensor Selection Guideline”... -
Page 14: On/O Cycling (Cycle Rate Limit)
Start-up sequence To ensure correct lubrication of all the for some seconds. Then the compressor speed mechanical parts, VRJ compressors start with increases up to the desired set point according to a de ned ramp-up, and stay at a xed speed capacity request. -
Page 15: System Design Recommendations
Application Guidelines System design recommendations General Successful application of scroll compressors beyond the limits given in this manual. Poor is dependent on careful selection of the performance, reduced reliability, or both may compressor for the application. If the compressor result. is not correct for the system, it will operate Essential piping design Proper piping practices should be employed to... -
Page 16: Refrigerant Charge Limit
Saturated suction temp. °F Preventing liquid ood back Danfoss recommends the use of an electronic Exceptions to the use of EXV’s with Danfoss expansion valve for all air conditioning and heat VRJ must be approved by Danfoss application pump applications with VRJ compressors. An engineering. -
Page 17: Water Utilising Systems
Loss of charge protection VRJ scroll compressors together with the variable speed drive include a loss of charge protection drive. function. This protection is ensured if pressure... -
Page 18: Sound And Vibration Management
The VRJ scroll compressor is designed to be quiet and the frequency of the sound generated is Because of the Danfoss unique design of a full- pushed into the higher ranges, which not only suction gas &... - Page 19 If vibrations still occur at some typical some frequency ranges and avoiding vibrations frequencies, a speed bypass function is available to occur. Refer to “Danfoss VRJ Installation and within the VRJ. This function allows avoiding Operation instructions” for setting details.
-
Page 20: Installation
Application Guidelines Installation Each VRJ scroll compressor is shipped with printed Instructions for installation. System cleanliness The refrigerant compression system, regardless System contamination is one of main factors a ecting equipment reliability and compressor of the type of compressor used, will only provide high e ciency and good reliability, along with a service life. -
Page 21: Compressor Connection
• Purge nitrogen or CO2 through the The PVE oil used in VRJ compressors is highly compressor in order to prevent against hygroscopic and will rapidly absorb moisture oxidation and ammable conditions. The from the air. -
Page 22: Liquid Line Lter Driers
Remove and replace the liquid line lter burnout drier and the liquid line and suction line drier and install a Danfoss type DAS burnout drier lter driers. of appropriate capacity. AB141686422149en-US0401... -
Page 23: Ordering Information And Packaging
Compressors are packed individually in a cardboard box. They can be ordered in any quantity. Minimum ordering quantity = 1. As far as possible, Danfoss will ship the boxes on full pallets of 9 compressors. Each box contains following accessories: •... - Page 24 Our products can be found in a variety of applications such as rooftops, chillers, residential air conditioners, heatpumps, coldrooms, supermarkets, milk tank cooling and industrial cooling processes. http://danfoss.us.com Danfoss Commercial Compressors, BP 331, 01603 Trévoux Cedex, France | +334 74 00 28 29 AB141686422149en-US0401 © Danfoss | DCS | 2022.12...
Need help?
Do you have a question about the VRJ and is the answer not in the manual?
Questions and answers