Related Manuals for Danfoss VLZ065
Summary of Contents for Danfoss VLZ065
- Page 1 Application guidelines Danfoss scroll compressors VLZ065 Single R404A (Frequency converter:SP110) www.danfoss.com...
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Page 3: Table Of Contents
Content GENERAL INFORMATION ......4 Manage operating envelope ....25 Requirement .............25 System evaluation ..........26 PRODUCT INFORMATION ....... 5 Manage speed limit ........ 30 Speed limit requirement ........30 Features............5 Start/Stop/Ramp setting ........30 How do IDVs work? ........... 5 Control logic ..........31 Compressor model designation ....6 Safety control logic requirements .... -
Page 4: General Information
Related instructions are guidelines, please contact Danfoss Technical highlighted with the following icons: Support. In any case, Danfoss accepts no liability as a result of the improper integration This icon indicates instructions to avoid of the compressor into the unit by the system safety risk. -
Page 5: Product Information
PVE 32 lubricant ensures better lubrication and efficiency Linear control oil pump Danfoss Intermediate Discharge Valves (IDVs) How do IDVs work? are located close to the discharge side of the compressor. They reduce excessive compression of refrigerant under part-load conditions while maintaining the same cooling capacity. -
Page 6: Compressor Model Designation
Compressor model designation Nomenclature Compressor nomenclature Variable speed Evolution index Other features Family Oil sight glass Oil level switch Oil drain Scroll (refrigeration) 9 Threaded None Schrader Fittings/connections Lubricant Brazed connections POE46(RL46HB) lubricant compatible terminal box R404A refrigerant Motor protection type Swept volume N: no internal motor protection in cm³/rev... -
Page 7: Technical Specifications
Technical specifications Compressor size To have the optimum compressor selection, Detailed performances can be found in select a compressor size which achieves the datasheets and in selection programs. peak load system cooling capacity demand at its maximum speed. the code number tables from the “Ordering Compressor and Note this compressor is equipped with frequency converter... - Page 8 6600 rpm model (cm³/rev) (cu.in/rev) (m³/h) (cu.ft/h) (m³/h) (cu.ft/h) (m³/h) (cu.ft/h) (m³/h) (cu.ft/h) (oz) (kg) (lbs) VLZ065 65.1 11.7 14.1 25.8 1.57 Frequency converter Mains supply voltage 380-440V±10% specifications Supply frequency 50 Hz Output voltage 0 - 100 % of supply voltage...
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Page 9: Dimensions
Recommended torque for mounting bolts: 11 Nm (±1 Nm) Earth grounding Version Compressor model Outline drawing number (mm) (inch) (mm) (inch) (mm) (inch) (mm) (inch) (mm) (inch) (mm) (inch) Unified VLZ065 183.5 7.22 17.17 15.87 10.28 190.5 190.5 8590007 AB402831990998en-000101... - Page 10 Dimensions VLZ065 single version Connection Details Suction connection Brazed 7/8" Discharge connection Brazed 3/4" Oil sight glass Threaded (1"1/8 – 18 UNF) Oil equalization connection Shrader Male 1/4" Flare incorporating a Schrader valve 1) VLZ compressors single versions come 2) Schrader: The oil fill connection and equipped with a threaded oil sight glass with gauge port is a 1/4"...
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Page 11: Electrical Data, Connections And Wiring
Never connect the Compressor electrical Compressor rated voltage Model RW(Ω) at 20°C line to line Max Operating Current (A) specifications VLZ065-G 0.177Ω±7% 19.5 RW: Winding resistance per winding, measured at motor terminals MOC (Max Operating Max. operating current is the max. continuous... - Page 12 Electrical data, connections and wiring Fuse/Air switch/Contactor Danfoss recommends using the Fuse/Air switch/Contactor listed below. Fuse Air switch Contactor Frequency converter HLP-SP110 Wire sizes Below table lists maximum wiring sizes for the motor compressor power supply cables. from drive to...
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Page 13: Phase Sequence And Reverse Rotation Protection
Electrical data, connections and wiring Soft-start control The SP110 frequency converter generates by Basically seen from the mains, the inrush peak design a compressor soft start with an default reach a level which is only a few percent more initial ramp up of 4.5s to 30 rps. than the rated nominal current. -
Page 14: Ip Rating
Electrical data, connections and wiring IP rating The compressor terminal box IP rating according to IEC529 is IP22. Element Numerals or letters Meaning for the protection of equipment Against ingress of solid foreign objects (non protected) ≥ 50 mm diameter First characteristic ≥... -
Page 15: Approval And Certificates
Approval and certificates Approvals and VLZ compressors comply with the following approvals and certificates. certificates VLZ code G Internal free volume Products Internal free volume at LP side without oil (lite/cu.inch) VLZ065 4.7/287 AB402831990998en-000101... -
Page 16: System Design
10V is control, oil return management and short cycling maximum compressor speed. protection. Below is the Danfoss proposed system configuration and wiring. SCHEMATIC DIAGRAM Unit Controller SP110 mp. ON /OFF... -
Page 17: Design Piping
Design piping General requirements Proper piping practices should be employed to: 2. Avoid condensed liquid refrigerant from draining back to the compressor when stopped 1. Ensure adequate oil return, even under (discharge piping upper loop). For validation minimum load conditions (refrigerant speed, tests see section “Manage off... -
Page 18: Design Compressor Mounting
Design compressor mounting General requirements Compressors used in single applications must be During operation, the maximum inclination from mounted with flexible grommets. the vertical plane must not exceed 7 degrees. All compressors are delivered with four rubber Single requirements grommets and metal sleeves. Compressors Not supplied must always be mounted with these grommets. -
Page 19: Manage Oil In The Circuit
Manage oil in the circuit Requirement Oil level must be visible or full in the sight glass when the compressor is running and when all compressors of the circuit are stopped. System evaluation Single compressor 1. Since each installation is unique, test can not validate the oil return, Oil separator* is mandatory 2. -
Page 20: Manage Sound And Vibration
This phenomenon has no impact on compressor compressors. Acoustic hoods are available from reliability. Danfoss as accessories. Refer to the table above for sound levels, attenuation and code numbers. 2. Use of sound-insulation materials on the inside of unit panels is also an effective means to reduce radiation. -
Page 21: Mechanical Vibrations
If some resonant frequencies generate high Mitigations methods: 1. Danfoss VLZ scroll compressors are designed to piping vibration, problem can be solved by produce minimal vibration during operations.To increasing piping stiffness with brackets or ensure minimum vibrations transmission to the changing layout. -
Page 22: Manage Superheat
Manage superheat During normal operation, refrigerant enters Liquid flood back can cause oil dilution and, in the compressor as a superheated vapor. Liquid extreme situations lead to liquid slugging that flood back occurs when a part of the refrigerant can damage compression parts. entering the compressor is still in liquid state. -
Page 23: Test, Criteria And Solutions
Manage superheat Test, criteria and solutions Test N° Purpose Test condition Pass criteria Solutions Liquid flood back testing must be carried out under expansion valve threshold operating conditions: •Lowest foreseeable evaporation, and highest foreseeable condensation. •Minimum speed running. For reversible system, perform test Suction superheat >5K Steady-state in both heating and cooling mode... -
Page 24: Manage Off Cycle Migration
***Pump-down cycle Cranckcase heater accessories are available from By decreasing pressure in the sump, pump down: Danfoss (see section “Accessories”). • Evacuates refrigerant from oil • Set the sump saturating pressure much lower than ambiance temperature and due to that, avoid refrigerant condensation in the compressor. -
Page 25: Manage Operating Envelope
135°C (275°F). Steady-state operation guarantees reliable operations of the compressor envelope is valid for a suction superheat above for steady-state operation. Single envelope control VLZ065 - R404A 3000-6600RPM RGT = 20°C 1800-6600RPM RGT = 20°C Evaporating temperature (°C) OE-000012... -
Page 26: System Evaluation
Manage operating envelope System evaluation VLZ drive can only protect the compressor from permanently checking that the compressor is over current. To manage operating envelop, an running within the defined envelope. advanced envelope protection principle needs to be used with variable speed compressors. When compressor reach a limit, controller can act This solution offers much better protection than on different parameter to avoid unit tripping. - Page 27 Manage operating envelope Multiple envelope control: Speed range <3000 allowed Controller needs to manage speed limitation Below 2400RPM oil boost function is disabled according to operating conditions. by default but could be enabled by OEM (more details “Oil management logic”) Protection required See “Test, criteria and solutions”...
- Page 28 Manage operating envelope Discharge temperature Discharge gas temperature (DGT) protection which illustrate where DGT protection is required protection is required if the high and low pressure switch (Ex. 1) and where it is not (Ex. 2). Please notice the settings do not protect the compressor against envelope boundaries change based on different operations beyond its specific application speed limits.
- Page 29 Manage operating envelope MOP (Max operating In steady state, it is essential to prevent the limit we have on our VS operating envelope. pressure) control compressor running when evaporating T° is higher than the specified envelope. Operating Regardless of EXV or TXV, customer needs to the compressor higher than maximum qualify the expansion device.
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Page 30: Manage Speed Limit
Manage speed limit Speed limit requirement Speed limit guarantees compressor by Danfoss. Customer could change the default reliability and must be respected. In drive control values if the changes have been qualified by logic, default setting values have been qualified OEM. -
Page 31: Control Logic
flow variations. Danfoss recommends the use of ETS products. Ramp-up and ramp-down Ramp-down of the EXV must be longer than the settings, of both EXV and compressor, must be ramp-down of the compressor, also to avoid low done with great care. -
Page 32: Short Cycle Protection
Control logic Short cycle protection Short cycling protection requirements need to be - 12 starts maximum per hour: to avoid threaten implemented in OEM unit controller: the life time of motor and other mechanics due to frequent starts, OEM needs to limit the starts Meantime, the factory default setting needs to cycles within 12 times per hour. -
Page 33: Oil Management Logic
Control logic Oil management logic SP110 integrates oil return management(ORM) function together with compressor oil boost function. But this function is disabled as default setting. OEM can enable this parameter if ORM function is needed. Otherwise, OEM must implement ORM in the system controller and qualify oil management. This function uses a timer. -
Page 34: Reduce Moisture In The System
To achieve this requirement, a properly sized For new installations with VLZ compressors with Solutions and type of drier is required. Important selection POE oil, Danfoss recommends using the Danfoss criteria’s include: DML (100% molecular sieve) solid core filter drier. • driers water content capacity, •... -
Page 35: Integration Into Systems
• Remove the nitrogen holding charge via the suction Schrader valve to avoid an oil mist blow out. Each Danfoss VLZ scroll compressor is • The use of lifting hooks closed with a clasp is Handling equipped with one lift ring on the top shell. -
Page 36: Piping Assembly
Assembly line procedure Piping assembly Good practices for piping assembly is a pre-requisite to ensure compressor service life (system cleanliness, brazing procedure...) System cleanliness Circuit contamination possible cause Requirement Brazing and welding oxides During brazing, flow nitrogen through the system Filings and particles from the removal of burrs in Remove any particles and burrs generated by tube pipe-work... -
Page 37: Vacuum Evacuation And Moisture Removal
Assembly line procedure Vacuum evacuation and moisture removal Requirements: Recommendations: • Never use the compressor to evacuate the • Energized heaters improve moisture removal. system. • Alternate vacuum phases and break vacuum. • Connect a vacuum pump to both the LP and HP with Nitrogen to improve moisture removal. -
Page 38: Commissioning
See news bulletin “Lubricants sight glass. filling in instructions for Danfoss Commercial Compressors” TI 2-025-0402. The presence of foam filling in the sight glass indicates large concentration of refrigerant in the oil and / or presence of liquid returning to the compressor. -
Page 39: Dismantal And Disposal
Dismantal and disposal Danfoss recommends that compressors and compressor oil should be recycled by a suitable company at its site. AB402831990998en-000101... -
Page 40: Ordering Information
(mm) (inch) (mm) (inch) (mm) (inch) (kg) (lb) VLZ065 20.6 11.5 11.3 Compressors are not packed individually but are ordered in quantities of full pallets only, multiples Compressor Industrial pack shipped all together on one pallet. They can be of 12 compressors, according to below table. -
Page 41: Ordering Codes
Ordering codes Danfoss scroll compressors VLZ can be ordered can be ordered in single packs. Please use the Compressor code numbers in either industrial packs or in single packs. Drive code numbers from below tables for ordering. Single pack 380-440V/3ph/50Hz... -
Page 42: Accessories
2 rotolock nuts 1"1/4 with sleeves and gaskets VLZ065 Multipack Rotolock adapter Code n° Description Application Packaging Pack size 120Z0367 Adaptor (1-1/4" ~ 7/8") VLZ065 suction Multipack 120Z0366 Adaptor (1-1/4" ~ 3/4") VLZ065 discharge Multipack Mounting kits Code No Description Application... - Page 43 Accessories Lubricant Code n° Description Application Packaging Pack size 120Z0648 POE lubricant, 215PZ(RL46HB),1 litre can VLZ065 Multipack Acoustic hoods Code No Description Application Packaging Pack Size 120Z5084 Acoustic hood for scroll compressor VLZ065 Single pack Terminal box Code No Description...
- Page 44 Danfoss Light Commercial Refrigeration Compressors 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. AB402831990998en-000101 © Danfoss | Climate Solutions | 2022.02...