Advertisement
Quick Links
Advertisement
Related Manuals for Danfoss VZH052
Summary of Contents for Danfoss VZH052
- Page 1 Application guidelines Danfoss scroll compressors VZH052-065 Single R410A http://cc.danfoss.com...
- Page 3 Requirement .............32 Technical specifications ......7 System evaluation ..........33 Dimensions ..........10 Manage speed limit .........37 VZH052-065G/J/H ........... 10 Speed limit requirement ........37 Start/Stop/Ramp setting ........37 Electrical data, connections and wiring 13 Supply voltage ............13 Control logic ........... 38 Phase sequence and reverse rotation Safety control logic requirements ....38...
- Page 4 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 PVE 32 lubricant ensures better lubrication and efficiency Linear control oil pump How do IDVs work? Danfoss Intermediate Discharge Valves (IDVs) 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 Nomenclature Compressor nomenclature Variable speed Evolution index Motor protection type Family N: no internal motor protection VZH scroll (protection by drive) Equipement version Lubricant A: brazed connections, single version PVE 32 (160 HV) lubricant, D: brazed connections, unified version R410A refrigerant Oil sight glass Oil level switch...
- Page 7 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. Frequency converter Different frequency converter variants are 3.
- Page 8 (cu.ft/h) (oz) (kg) (lbs) VZH065 65.1 11.7 14.1 25.8 1.57 VZH052 52.1 11.3 20.6 1.57 Frequency converter specifications T2: 200 - 240 V ±10% (3-phase) Mains supply voltage T4: 380 - 480 V ±10% (3-phase) T6: 525 - 600V ±10% (3-phase)
- Page 9 0VAC External Load / Relay Sensor Sensor Sensor External External Load / Relay Load / Relay Oil level sensor is a special component which assembles on variable speed compressor. It is provided in oil level sensor accessory kit. VZH052-065 AB237586440343en-000601...
- Page 10 Dimensions VZH052-065G/J/H ΦD ΦD Single version Unified version Terminal box Mounting Grommet 29.5 EMC bracket to terminations Ø11 of shielded wire Ø 41 Recommended torque for mounting bolts: 11 Nm (±1 Nm) Earth grounding Version Compressor model Outline drawing number...
- Page 11 Dimensions Connection Details VZH052-065 single version 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) VZH 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"...
- Page 12 (20.47x9.06x9.53) (23.43x9.06x9.53) (25.59x9.53x10.24) Variable speed compressor package VZH065 (voltage code G) + CDS303 (T4, 11kW) is qualified, to be used at drive supply voltage 380-440V (3 phase, 50/60Hz). Any further information please contact local Danfoss engineers. Enclosure Height Width Depth Mounting hole Max.
- Page 13 525-600V /3ph / 50Hz & 60Hz (±10%) supply in case of motor burnt. Compressor electrical Compressor rated RW(Ω) at 20°C line Max Operating specifications Model RLA (A) voltage (V) to line Current (A) VZH052-G 22.6 VZH052-H 22.6 0.177Ω±7% VZH065-G 27.2 31.2 VZH065-H 27.2 31.2 VZH052-J 44.2...
- Page 14 Electrical data, connections and wiring Fuses Danfoss recommends using the fuses listed For circuit breakers, Moeller types have been below to protect service personnel and property tested and are recommended. in case of component break-down in the frequency converter. UL Compliant fuses...
- Page 15 Electrical data, connections and wiring Soft-start control The CDS303 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 7.5s to 50 rps. than the rated nominal current.
- Page 16 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 17 (Underwriters Laboratories) EMC Class A Group 1 VZH compressor and drive package 2014/30/EU VZH code G Low voltage directive Products VZH052-065 2014/35/EU Declaration of conformity ref. Contact Danfoss Low voltage directive 2014/35/EU Internal free volume Products Internal free volume at LP side without oil (lite/cu.inch) VZH052 4.7/287...
- Page 18 Drive installation Direct and indirect IP20 drives are intended for indoor or cabinet For outdoor use the electrical cabinet must be exposure of drive to water mounting. Application example: drive fitted in IP54 or the drive itself must be IP54. Application a machine room, basement or in an electrical example: rooftop units or condensing units.
- Page 19 Drive installation Ambient temperature The maximum ambient temperature for the drive Test at the unit at highest ambient maximum is 50°C. load is recommended. Look for over temperature drive alarm. Make sure that the clearance limits described above are respected. The drive could operate lower to -10C with proper operation, such as inside the cabinet, The drive must be installed on a wall or on a back...
- Page 20 • Add ferrite cores on power lines and earth line if necessary to pass EMC class A. EMC correct installation EMC qualification reports are available upon request to Danfoss technical support. of an frequency drive CDS303 PLC etc.
- Page 21 EMC installation EMC remediation To pass EMC class A, for the above models, ferrite anti-interference component in electronic cores (4pcs) need to be added on both the power circuits, which helps to reduce electromagnetic lines and the earth line, in addition, a knot has interference at different frequency.
- Page 22 10V is control, oil return management and short cycling maximum compressor speed. protection. Below is the Danfoss proposed system configuration and wiring. SCHEMATIC DIAGRAM CDS 303 Comp. ON /OFF...
- Page 23 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 tests see section “Manage off cycle migration”. minimum load conditions (refrigerant speed, piping slopes…).
- Page 24 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. Single requirements All compressors are delivered with four rubber grommets and metal sleeves. Compressors Not supplied with grommet must always be mounted with these grommets.
- Page 25 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 Non split Test N°1 1. Since each installation is unique, test can not validate the oil return, Oil separator is mandatory Split 2.
- Page 26 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 27 Mitigations methods: If some resonant frequencies generate high 1. Danfoss VZH scroll compressors are designed piping vibration, problem can be solved by to produce minimal vibration during operations. increasing piping stiffness with brackets or To ensure minimum vibrations transmission changing layout.
- Page 28 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 29 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 30 Since each installation is unique, refrigerant charge may vary • Belt type heater* Split • Liquid Line Solenoid Valve**+ pump-down cycle*** • External Non-Return Valve Charge limit is defined in table below: Models Refrigerant charge limit (kg / lb) Single VZH052-065 5.4 / 12 AB237586440343en-000601...
- Page 31 ***Pump-down cycle By decreasing pressure in the sump, pump down: Cranckcase heater accessories are available from 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 32 Manage operating envelope Requirement The operating envelope for VZH scroll Moreover, the discharge gas temperature must compressors is given in the figures below and not exceed 135°C (275°F). Steady-state operation guarantees reliable operations of the compressor envelope is valid for a suction superheat within for steady-state operation.
- Page 33 Manage operating envelope System evaluation VZH 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 34 Manage operating envelope Multiple envelope control: Speed range <2400 allowed Controller needs to manage speed limitation 2400RPM to 6000RPM is allowed in area 1.1; 1.2 and 1.3 according to operating conditions. 1000RPM to 1800RPM is allowed in area 1.1 4200RPM to 6000RPM is allowed in all area 1800RPM to 2400RPM is allowed in area 1.1 and Below 2400RPM oil boost function is enabled by default (more details “Oil management logic”)
- Page 35 Manage operating envelope Discharge temperature For VZH052-065 compressors, the external specific application envelope. Please refer to protection Discharge Gas Temperature protection (DGT) the examples below, which illustrate where DGT is required in zone 1.4 or if the high and low protection is required (Ex.
- Page 36 Manage operating envelope MOP (Max operating In steady state, it is essential to prevent the (80.6°F) limit we have on our VS operating pressure) control compressor running when evaporating T° is envelope. higher than the specified envelope. Operating the compressor higher than maximum Regardless of EXV or TXV, customer needs to evaporating temperature will cause low viscosity qualify the expansion device.
- Page 37 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 38 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 39 Compressor Heating 100% * EXV Opening degree and time have to be set Danfoss recommend above defrost cycle logic, to keep a minimum pressure for 4 way valve but the control logic is also system specified. moving. In any case, defrost logics must respect requirements and tests described in “Manage...
- Page 40 2813 Boost Duration Oil management related parameters, 28-11, 28- Considering oil return risk, a split system 12, 28-13 could also be programmed by OEM. with more than 10 m piping length requires mandatory application approval by Danfoss application specialists. AB237586440343en-000601...
- Page 41 To achieve this requirement, a properly sized For new installations with VZH compressors with and type of drier is required. Important selection PVE oil, Danfoss recommends using the Danfoss criteria’s include: DML (100% molecular sieve) solid core filter drier. • driers water content capacity, •...
- Page 42 • Remove the nitrogen holding charge via the suction Schrader valve to avoid an oil mist blow out. Handling Each Danfoss VZH scroll compressor is • The use of lifting hooks closed with a clasp is equipped with one lift ring on the top shell. recommended.
- Page 43 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 44 Assembly line procedure Vacuum evacuation and moisture removal Requirements: Recommendations: • Energized heaters improve moisture removal. • Never use the compressor to evacuate the system. • Alternate vacuum phases and break vacuum. • Connect a vacuum pump to both the LP and HP with Nitrogen to improve moisture removal.
- Page 45 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 46 Setting Error(s) cable Check VZH Come back to Motor resistance factory settings and isolation Correct Incompatibility the fault Between Software & Mains shut-off Additional option before checking ! Contact your Local Danfoss Reset & start March, 2014| Commercial Compressors AB237586440343en-000601...
- Page 47 Check main power supply Check power voltage supply voltage Power normal Set 14-11 to lower value Internal components damage Too high or Reset & start too low Contact your Local Danfoss Turn off power Reset & start March, 2014| Commercial Compressors AB237586440343en-000601...
- Page 48 Troubleshooting Check alarm # (Continue) Start failed Speed limit (low) Wrong wiring of U/V/W Minimum speed not reached after 2 sec. Compressor bearing wear Compressor stopped, similar reason as A49 Compressor stopped Automatic restart after 30s Automatic restart after 30s 10 restarts before blockage 10 restarts...
- Page 49 Dismantal and disposal Danfoss recommends that compressors and compressor oil should be recycled by a suitable company at its site. AB237586440343en-000601...
- Page 50 (mm) (inch) (mm) (inch) (mm) (inch) (kg) (lb) VZH052-VZH065 20.6 11.5 11.3 Compressor Industrial pack Compressors are not packed individually but are ordered in quantities of full pallets only, multiples shipped all together on one pallet. They can be of 12 compressors, according to below table.
- Page 51 VZH065 CDS303 22kW IP55 CDS303P22KT6P55HX 135X3559 Variable speed compressor package VZH065 (voltage code G) + CDS303 (T4, 11kW) is qualified, to be used at drive supply voltage 380-440V (3 phase, 50/60Hz). Any further information please contact local Danfoss engineers. AB237586440343en-000601...
- Page 52 2 rotolock nuts 1"1/4 with sleeves and gaskets VZH052-065 Multipack Rotolock adapter Code n° Description Application Packaging Pack size 120Z0367 Adaptor (1-1/4" ~ 7/8") VZH052-065 suction Multipack 120Z0366 Adaptor (1-1/4" ~ 3/4") VZH052-065 discharge Multipack Mounting kits Code No Description Application...
- Page 53 Accessories Lubricant Code n° Description Application Packaging Pack size 120Z5034 PVE lubricant, 1 litre can 320HV (FVC68D) VZH052-065 Multipack Acoustic hoods Code No Description Application Packaging Pack Size 120Z5084 Acoustic hood for scroll compressor VZH052-065 Single pack Terminal box Code No...
- Page 54 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://cc.danfoss.com Danfoss Commercial Compressors, BP 331, 01603 Trévoux Cedex, France | +334 74 00 28 29 © Danfoss | DCS (CC) | 2019.10 AB237586440343en-000601...