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Application guidelines

48

FRCC.PC.023.A7.22

Single compressors

System design recommendations

Compressors discharge a small percentage of oil
that is mixed with the compressed refrigerant.
The oil is circulated through the system and
the compressor is dependent on the system
design to bring it back. The use of variable speed
compressor technology in systems with long
piping, especially for split systems, is among the
most challenging configurations for oil return.
In order to prevent compressors from breaking
down due to oil level issues, Danfoss requires the
use of an oil separator in all long piping systems,
particularly for split systems.

Variable speed compressors used in split systems
as well as long piping provide an increased
challenge to system oil management due to
the reduced velocities at low speed operation.
Low oil velocity can cause oil deposits in pipes,
heat exchangers and other system components
that can cause an insufficient oil level inside the
compressor.

It is the responsibility of the systems OEM to
ensure the proper oil return to the compressors
including the qualification of all possible
operating modes, equipment configurations and
accessory options (multiple evaporators, reheat
coils for example) that could impact oil return to
the compressors.

Especially for split systems using variable speed
compressors, in which every installation is unique
and qualification of individual installations is not
practical, Danfoss requires that OEMs install an oil
separator.

The requirement of an oil separator is also
suitable for any other system with complex
piping (long line set, U trap…), multiple heat
exchangers and elevation changes.

Many oil separator designs exist, the selection,
requirements and recommendations of the Oil
Separator manufacturer should be followed.

Customers have the opportunity to select
Chiyoda (CE marked) since it has been tested
successfully by Danfoss. Detailed information
hereafter.

Please note that an oil separator is not 100%
efficient. A good system design and efficient oil
management remain essential.

Oil management

Check valve

Oil separator

Strainer

Solenoid valve

Capillary

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Содержание VZH 088

Страница 1: ...Inverter scroll compressors VZH088 117 170 single and manifold R410A Application guidelines http danfoss us com ...

Страница 2: ......

Страница 3: ...Application guidelines 3 FRCC PC 023 A7 22 Single compressors Content VZH088 117 170 single compressors 4 VZH088 117 170 hybrid manifolding 74 ...

Страница 4: ...ingle version 25 VZH117 J manifolded version 25 VZH170 G H single version 26 VZH170 G H manifolded version 26 VZH170 J single version 27 VZH170 J manifolded version 27 Sight glass oil level switch 28 Schrader 28 Oil equalisation connection 28 Oil drain fitting 28 Suction discharge connections 28 Frequency converter dimensions 28 Electrical data connections and wiring 35 Supply voltage 35 Compresso...

Страница 5: ...d level 56 Sound generation in a refrigeration or air conditioning system 56 Compressor sound radiation 56 Mechanical vibrations 56 Speed by pass 57 Gas pulsation 57 Installation 58 Compressor handling 58 Mounting 58 Removing connections shipping plugs 58 System cleanliness 59 Tubing 59 Filter driers 59 Brazing and soldering 59 Compressor connection 59 High voltage test 61 System pressure test 61 ...

Страница 6: ...igh grade cast iron scroll set 2 ranges for high and low pressure ratio A patented oil injection system ensures optimal efficiency at low speed by improving scroll set sealing Lead free polymer bearing with excellent performance under diverse loads and speeds Permanent magnet motor with high efficiency at all speeds Oil strainer controls the risk of system debris in the oil injection circuit Gearo...

Страница 7: ...r a maximum of time at part load where the system efficiency is highest Performance tables at 3 speeds can be found in the following pages Detailed performances can be found in datasheets and in selection programs Compressor size Different frequency converter variants are available according to 1 Main supply voltage 2 IP class CDS303 drives are available in IP20 or IP55 housings 3 RFI class Radio ...

Страница 8: ...verter Oil sight glass Oil level switch Single version Threaded None Manifold version None Threaded H2 E20 T4 P15K 303 CDS Dedicated compressor drive for VZH VSH scroll Serie 303 High overload output power in kW Main supply voltage T2 200 240V 3 ph 50 60 Hz T4 380 480V 3 ph 50 60 Hz T6 525 600V 3 ph 50 60 Hz RFI class Enclosure protection IP rating Note High overload output power output power 160 ...

Страница 9: ...or functions Discharge gas temperature protection pressostat thermostat function short cycle protection oil return management Oil injection control Bearings lubrication VZH compressors are equipped with an oil injection system that makes the compression pockets more tight thus improving the isotropic efficiency of the compressor as well as controls the oil circulation ratio at all running speeds T...

Страница 10: ...7 27 92600 7 40 113800 7 55 138600 7 73 167200 7 95 196500 8 18 110 51400 8 94 65100 9 02 81200 9 12 100100 9 24 122200 9 38 147800 9 55 174000 9 73 130 68500 11 52 84700 11 59 103800 11 67 125900 11 79 148700 11 92 140 76100 13 09 93400 13 15 113700 13 23 134700 13 32 145 82200 14 87 100600 14 91 119700 14 98 6000 100 70 110500 10 59 137300 11 06 169600 11 62 207800 12 27 252400 13 03 90 98700 12...

Страница 11: ... 99900 7 40 122700 7 55 149200 7 73 179800 7 95 211200 8 18 110 56500 8 94 71500 9 02 89000 9 12 109700 9 24 133700 9 38 161400 9 55 190000 9 73 130 77200 11 52 95400 11 59 116600 11 67 141200 11 79 166600 11 92 140 87700 13 09 107400 13 15 130500 13 23 154400 13 32 145 98500 14 87 120100 14 91 142600 14 98 6000 100 70 118100 10 59 146600 11 06 180900 11 62 221400 12 27 268800 13 03 90 106700 12 7...

Страница 12: ... 7 15 93300 7 27 114700 7 42 139600 7 60 168500 7 81 198000 8 04 110 51800 8 78 65600 8 86 81800 8 96 100900 9 07 123100 9 21 148900 9 38 175300 9 56 130 69000 11 31 85400 11 38 104500 11 47 126800 11 58 149900 11 71 140 76700 12 86 94100 12 91 114600 12 99 135800 13 09 145 82900 14 61 101300 14 65 120600 14 71 6000 rpm 100 70 111300 10 40 138400 10 87 170900 11 41 209300 12 05 254300 12 80 90 994...

Страница 13: ...15 100600 7 27 123600 7 42 150300 7 60 181200 7 81 212800 8 04 110 57000 8 78 72000 8 86 89700 8 96 110500 9 07 134700 9 21 162700 9 38 191400 9 56 130 77800 11 31 96100 11 38 117400 11 47 142300 11 58 167900 11 71 140 88400 12 86 108300 12 91 131500 12 99 155500 13 09 145 99300 14 61 121000 14 65 143700 14 71 6000 rpm 100 70 119000 10 40 147700 10 87 182300 11 41 223100 12 05 270800 12 80 90 1075...

Страница 14: ...68000 84600 104400 127800 155000 90 43500 46900 59700 75100 93300 114700 139600 168500 198000 110 51800 65600 81800 100900 123100 148900 175300 130 69000 85400 104500 126800 149900 140 76700 94100 114600 135800 145 82900 101300 120600 6000 rpm 100 70 111300 138400 170900 209300 254300 90 99400 124700 154700 190100 231300 278900 327700 110 87400 110000 136800 168200 204900 247300 290800 130 115900 ...

Страница 15: ...200 165100 90 47100 50700 64600 81100 100600 123600 150300 181200 212800 110 57000 72000 89700 110500 134700 162700 191400 130 77800 96100 117400 142300 167900 140 88400 108300 131500 155500 145 99300 121000 143700 6000 rpm 100 70 119000 147700 182300 223100 270800 90 107500 134600 166900 204800 249000 300000 352200 110 96100 120800 150000 184300 224100 270200 317400 130 130700 160500 195300 23580...

Страница 16: ...400 7 71 59300 7 76 74900 7 68 93300 7 51 114800 7 32 139900 7 15 168600 7 06 198000 7 10 110 65500 9 84 82100 9 76 101300 9 58 123600 9 36 149200 9 16 175300 9 04 130 85600 12 45 104900 12 27 127200 12 05 149900 11 85 140 94300 14 00 114800 13 80 135700 13 59 145 88500 14 94 108100 14 76 128200 14 55 6000 100 70 109700 10 48 135900 10 43 167400 10 37 204600 10 41 248300 10 67 90 99300 13 64 12420...

Страница 17: ... 7 71 64200 7 76 80900 7 68 100600 7 51 123800 7 32 150600 7 15 181400 7 06 212800 7 10 110 72000 9 84 90000 9 76 111000 9 58 135200 9 36 163000 9 16 191400 9 04 130 96400 12 45 117900 12 27 142700 12 05 167900 11 85 140 108400 14 00 131700 13 80 155500 13 59 145 103600 14 94 126200 14 76 149300 14 55 6000 rpm 100 70 117300 10 48 145100 10 43 178500 10 37 218100 10 41 264500 10 67 90 107300 13 64 ...

Страница 18: ...52 46700 7 57 59800 7 62 75400 7 54 94000 7 38 115700 7 19 140900 7 02 169900 6 94 199500 6 97 110 66000 9 67 82700 9 59 102100 9 41 124500 9 20 150300 9 00 176700 8 88 130 86300 12 23 105700 12 05 128100 11 83 151100 11 64 140 95000 13 76 115600 13 56 136700 13 35 145 89200 14 68 108900 14 50 129100 14 30 6000 rpm 70 110500 10 29 136900 10 25 168600 10 18 206200 10 22 250200 10 48 90 100000 13 40...

Страница 19: ...108000 7 32 129800 7 15 154600 7 01 182800 6 94 214400 6 97 110 64500 9 66 79400 9 65 96700 9 54 116400 9 37 138800 9 18 164300 9 00 192800 8 88 130 83600 12 29 101200 12 20 121100 12 03 143700 11 83 169200 11 64 140 92700 13 86 111400 13 74 132700 13 56 156700 13 35 145 106500 14 66 127100 14 50 150400 14 30 6000 rpm 100 70 108400 10 28 131500 10 28 159000 10 22 191200 10 18 228600 10 25 271500 1...

Страница 20: ...50100 53700 67600 84500 104800 128600 156400 90 43300 46700 59800 75400 94000 115700 140900 169900 199500 110 66000 82700 102100 124500 150300 176700 130 86300 105700 128100 151100 140 95000 115600 136700 145 89200 108900 129100 6000 rpm 100 70 110500 136900 168600 206200 250200 90 100000 125100 155000 190100 231000 278400 326800 110 110000 136800 168300 205000 247500 291200 130 140600 172000 2085...

Страница 21: ...8400 119000 142600 169700 90 46800 58700 72700 89100 108000 129800 154600 182800 214400 110 64500 79400 96700 116400 138800 164300 192800 130 83600 101200 121100 143700 169200 140 92700 111400 132700 156700 145 106500 127100 150400 6000 rpm 100 70 108400 131500 159000 191200 228600 271500 90 98600 121000 147300 177900 213100 253500 299400 351300 110 108000 131900 159800 191800 228600 270500 317900...

Страница 22: ... 3 inch hole Grommet All dimensions in inch Electrical box Ø8 82 Ø8 69 Ø9 57 18 49 max 3 66 5 83 3 1 7 08 9 05 9 05 7 5 7 5 7 11 6 06 6 22 4 holes Ø0 75 30 30 60 0 59 with compression 8 64 17 17 Discharge 7 8 Suction 1 1 8 Ø8 82 Ø8 69 Ø243 8 64 17 17 4 holes Ø0 75 oil equalisation Ø32 1 75 12UN 2A 9 05 30 30 60 9 05 7 5 7 11 6 06 6 22 7 5 3 66 2 35 3 1 Discharge 7 8 Suction 1 1 8 5 83 0 59 with co...

Страница 23: ...Grommet All dimensions in inch Electrical box VZH088 J single version Ø8 82 Ø9 57 4 holes Ø0 75 7 16 0 59 with compression 9 05 7 89 6 06 7 91 7 5 30 6 22 7 5 9 05 30 60 3 1 Discharge 7 8 Suction 1 1 8 8 64 17 17 8 69 6 18 3 62 18 49 max Ø8 82 Ø8 69 Discharge 7 8 Suction 1 1 8 Ø9 57 4 holes Ø0 75 oil equalisation Ø32 1 75 12UN 2A 18 49 max 6 18 2 35 9 05 9 05 6 06 7 11 6 22 30 30 60 7 5 7 5 3 1 8 ...

Страница 24: ...hole Grommet All dimensions in inch Electrical box 3 66 7 68 20 75 max Ø8 69 4 holes Ø 0 75 19 43 10 33 3 37 7 08 9 05 9 05 7 11 6 06 6 81 30 30 60 7 5 7 5 0 57 with compression Ø9 57 Suction 1 3 8 Ø8 82 Discharge 7 8 Ø8 82 Ø8 69 Ø9 57 4 hole Ø 0 75 Ø32 oil equalisation 1 75 12 UN 2A 19 43 10 33 3 37 2 27 3 66 7 68 7 16 9 05 9 05 7 5 5 62 7 11 6 06 6 81 30 30 60 7 5 0 57 with compression 20 75 max...

Страница 25: ...kout Power supply Grommet All dimensions in inch Electrical box 4 hole Ø 0 75 0 57 with compression 9 05 30 30 60 9 05 7 5 7 5 7 91 Ø8 82 Ø8 69 Ø9 57 20 75 max 6 18 5 47 3 37 7 16 6 06 7 89 Discharge 7 8 Suction 1 3 8 19 43 10 33 Ø8 82 Ø8 69 Ø9 57 oil equalisation Ø32 1 75 12 UN 2A 4 hole Ø 0 75 6 18 5 47 2 27 3 37 10 33 19 43 Discharge 7 8 Suction 1 3 8 7 16 0 57 with compression 9 05 7 89 6 06 6...

Страница 26: ... 60 14 61 12 11 5 96 20 9 3 64 25 94 max Suction 1 5 8 Ø10 47 Ø10 12 Ø 12 52 Ø38 oil equalisation 2 25 12 UN 2A 4 holes Ø0 75 7 8 8 27 11 87 3 01 20 9 24 29 3 64 Discharge 1 1 8 5 96 3 21 13 58 14 61 30 60 2x 60 11 12 7 56 17 64 10 12 13 9 8 62 Suction 1 5 8 25 94 max Cover holding screw x2 Torque 2 2 Nm Faston 1 4 tabs Terminal box Power supply Sump heater Ø 1 59inch hole Ø 1 98inch knockout HM 8...

Страница 27: ... holes Ø 0 75 Ø12 52 10 9 6 77 11 87 3 01 13 58 11 12 14 61 30 60 60 2x 8 62 7 56 18 94 10 9 12 16 13 9 3 21 5 96 20 9 24 29 3 64 25 94 max Suction 1 5 8 4 holes Ø 0 75 oil equalisation Ø38 2 25 12 UN 2A 13 58 11 7 56 18 94 10 9 60 8 62 12 14 61 13 9 30 60 2x Ø10 47 Ø10 12 Ø12 52 3 01 11 87 3 21 5 96 20 9 24 29 6 77 10 9 25 94 max Suction 1 5 5 3 64 Discharge 1 1 8 HM 8 bolt Lock washer Flat washe...

Страница 28: ...lock adaptors are available refer to section Accessories Frequency converter dimensions depend on supply voltage IP rating and power The below table gives an overview of the overall dimensions and different drive enclosures B1 C3 Details for each drive enclosure are on the following pages Sight glass oil level switch Oil equalization VZH088 Rotolock 1 3 4 VZH117 Rotolock 1 3 4 VZH170 Rotolock 2 1 ...

Страница 29: ...480 Volts 15 kW IP55 housing scale 1 2 9 0 35 9 0 35 242 9 53 480 18 9 Min 100 3 94 Air space inlet Min 100 3 94 Air space outlet 9 0 35 19 0 75 9 0 35 12 0 47 scale 1 2 Mounting base Dimensions in mm inch 454 17 87 210 8 27 260 10 24 Air outlet Air inlet 180 7 09 40 1 57 37 1 46 43 1 7 41 1 61 84 3 31 11 0 43 34 1 34 ...

Страница 30: ...0 volts 18 22 kW IP55 housing Scale 1 2 9 0 35 9 0 35 9 0 35 9 0 35 12 0 47 Ø19 0 75 Scale 1 2 624 24 57 210 8 27 Mounting base Dimensions in mm inch 260 10 24 Air outlet Air inlet 180 7 09 34 1 34 37 1 46 43 1 7 30 1 18 84 3 31 11 0 43 40 1 57 242 9 53 650 25 59 Min 200 7 87 Air space inlet Min 200 7 87 Air space outlet ...

Страница 31: ...ency converter enclosure B3 380 480 volts 15 kW IP20 housing Scale 1 2 6 8 0 27 6 8 0 27 7 9 0 31 8 0 31 Ø12 0 47 Scale 1 2 165 65 140 5 51 399 15 71 380 14 96 Mounting base 249 9 80 420 16 53 Air outlet Air inlet Dimensions in mm inch Min 100 3 94 Air inlet Min 100 3 94 Air space outlet ...

Страница 32: ... 22 kW IP20 housing 200 240 volts 15 kW IP20 housing 525 600 volts 18 30 kW IP20 housing Scale 1 1 8 5 0 33 8 0 31 8 5 0 33 15 0 59 Scale 1 1 230 9 05 200 7 87 495 19 49 520 20 47 Mounting base Dimensions in mm inch 595 23 43 460 18 11 242 9 53 35 1 38 Air inlet Air outlet Min 200 7 87 air space inlet Min 200 7 87 air space outlet ...

Страница 33: ...uency converter enclosure C1 200 240 volts 15 18 22 kW IP55 housing 9 10 scale 1 2 Dimensions in mm inch 308 310 648 272 9 9 8 12 scale 1 2 680 Min 200 Air space outlet Min 200 Air space inlet Air inlet Mounting base Air outlet 0 35 0 38 0 47 0 74 12 12 26 77 12 20 10 70 25 51 0 39 0 35 ...

Страница 34: ...requency converter enclosure C3 200 240 volts 18 22 kW IP20 housing Min 200 7 87 Air space outlet Min 200 7 87 Air space intlet Air intlet Dimensions in mm inch 630 24 80 488 19 21 521 20 51 550 21 65 333 13 11 308 12 13 270 10 63 8 5 0 33 8 5 0 33 12 0 47 17 0 67 36 1 42 Air outlet ...

Страница 35: ...frequency converter supply for code G When having a supply of 230V 380V or 460V the following coefficients must be applied I460 0 87 I400 I380 1 05 I400 I230 0 90 I208 There is no modification for cooling capacity and power input Since data published for code H is based on 575V frequency converter supply thus there will be no coefficients modification applied for H code Supply voltage Voltage code...

Страница 36: ...IP20 IP55 Size Type Type RK1 Type J Type T Type RK1 Type RK1 Type RK1 Moeller type 200 240 V CDS 15kW 125 A gG KTN R125 JKS 150 JJN 125 2028220 125 KLN R125 A2K 125R NZMB1 A100 NZMB2 A200 CDS 18 5 kW 125 A gG KTN R125 JKS 150 JJN 125 2028220 125 KLN R125 A2K 125R NZMB2 A200 NZMB2 A200 CDS 22 kW 160 A gG FWX 150 2028220 150 L25S 150 A25X 150 NZMB2 A200 NZMB2 A200 380 480 V CDS 15 kW 63 A gG KTS R50...

Страница 37: ...trical contact between the mounting plate and the metal chassis of the converter Use star washers and galvanically conductive installation plates to secure good electrical connections Refer to instructions MG34M302 for tightening torques and screw sizes Note that the CDS303 must be mounted on a plain wall to ensure a good air flow through its heat exchanger From network to frequency converter From...

Страница 38: ...ing rail Cable insulation stripped All cable entries in one side of panel Motor cable Motor 3 phases and protective ground Reinforced protective ground L1 L2 L3 PE Mains supply Control cables PLC Min 0 025 in 16 mm Equalizing cable Min 7 9 in 200 mm between control cables motor cable and mains cable EMC qualification reports are available upon request to Danfoss technical support ...

Страница 39: ...N RS 485 69 COM RS 485 61 0V 5V S801 0 4 20 mA RS 485 RS 485 03 10Vdc 10Vdc 10Vdc 10Vdc 0 4 20 mA 10Vdc 240Vac 2A 24Vdc 02 01 05 04 06 240Vac 2A 24V NPN 0V PNP 0V PNP 24V NPN 19 D IN 24V NPN 0V PNP 27 24V 0V D IN OUT 0V PNP 24V NPN D IN OUT 0V 24V 29 24V NPN 0V PNP 0V PNP 24V NPN 33 D IN 32 D IN 1 2 ON S201 ON 2 1 S202 ON I 0 20mA OFF U 0 10V 95 400Vac 2A P 5 00 2 1 ON S801 R 82 R 81 3 Phase power...

Страница 40: ...P LP switch X X 12 External On Off NO X X 13 Factory bridged to 37 X X 13 Sensor X 18 External On Off NO X X 19 Digital input 27 HP LP switch NC safety devices X X 29 Digital input output 32 33 Digital input 20 Digital input Common 37 Factory bridged to 13 X X 98 To compressor terminal T3 X X 97 To compressor terminal T2 X X 96 To compressor terminal T1 X X 99 To compressor earth connection X X 02...

Страница 41: ...mpressor terminal box IP rating according to CEI529 is IP54 when correctly sized IP54 rated cable glands are used Motor protection is provided by the frequency converter All parameters are factory preset in order to guaranty locked rotor or overload current protection When a warning situation is reached in the current control the CDS303 frequency converter will automatically reduce the compressor ...

Страница 42: ...0038 European Directive VZH code G code J UL Underwriters Laboratories All VZH models EMC 2014 30 EU All VZH models Products Internal free volume at LP side without oil lb VZH088 28 VZH117 33 VZH170 66 Products VZH088 VZH117 VZH170 Fluids Group 2 Category PED II Evaluation module D1 TS service temperature LP 31 F TS 131 F 31 F TS 123 8 F PS service pressure LP 483 psi g 483 psi g 438 psi g Product...

Страница 43: ...w PR 25 100 rps condensing temperature from 60C to 56C 30 90 rps condensing temperature from 63C to 62C The operating envelopes for VZH scroll compressors are given in the figures below where the condensing and evaporating temperatures represent the range for steady state operation Under transient conditions such as start up and defrost the compressor may operate outside this envelope for short pe...

Страница 44: ...x 1 and where it is not Ex 2 Discharge gas temperature protection function A discharge temperature monitor function can be enabled in the frequency converter All settings are available in parameter list 28 2x they are factory preset as follow 28 20 0 none temperature source sensor input 28 21 60 C temperature unit 28 24 130 warning level 28 25 1 decrease cooling warning action 28 26 145 emergency ...

Страница 45: ...ection device must be installed on all heat pumps In reversible air to air and air to water heat pumps the discharge temperature must be monitored during development test by the equipment manufacturer The compressor must not be allowed to cycle on the discharge gas thermostat Continuous operations beyond the compressor s operating range will cause serious damage to the compressor A DGT accessory i...

Страница 46: ...ith great care Customer could also use thermostatic expansion valve TXV if they have qualified their systems and get Danfoss approval Ramp up of the EXV must be shorter than the ramp up of the compressor to avoid any low pressure operation on suction side of the compressor The EXV can also be opened up to a certain degree before the start up of the compressor Ramp down of the EXV must be longer th...

Страница 47: ...m draining back to the compressor when stopped For inverter applications with long lines it is recommended to use an oil separator even if it is only the condenser which is far away from the unit Piping design must also be made with care in order to make sure the remaining oil not trapped Piping should be designed with adequate three dimensional flexibility It should not be in contact with the sur...

Страница 48: ...ide the compressor It is the responsibility of the systems OEM to ensure the proper oil return to the compressors including the qualification of all possible operating modes equipment configurations and accessory options multiple evaporators reheat coils for example that could impact oil return to the compressors Especially for split systems using variable speed compressors in which every installa...

Страница 49: ...me L 7 2 8 3 10 5 Inlet size in 7 8 7 8 1 1 8 outlet size in 7 8 7 8 1 1 8 Footprint LxW mm x mm 190 5x102 H1 Height mm 297 355 469 H2 Height mm 457 515 635 H Height mm 469 527 645 Capillary tube Inner diameter mm Φ1 6 Φ1 8 Φ1 8 length mm 1400 1530 1380 Strainer Mesh size 100 100 100 Solenoiid valve Model Danfoss Orifice Φ2 0 CE Orifice mm Φ2 0 code number 032F1201 connection in 1 4 solenoil coil ...

Страница 50: ...C systems Furthermore for good operation of the expansion device and to maintain good efficiency in the evaporator it is important to have an adequate liquid sub cooling Without adequate sub cooling flash gas will be formed at the expansion device resulting in a high degree of vapor at the evaporator inlet leading to low efficiency Heat exchangers Model Refrigerant charge limit lb VZH088 13 VZH117...

Страница 51: ... low side in order to prevent off cycle migration The recommended low pressure pump down switch setting is 21 psig below the nominal evaporating pressure It shall not be set lower than 33 psi Liquid receiver Refrigerant charge optimization varies with compressor speed To avoid flash gas at low speed a receiver may be necessary Receiver dimensioning requires special attention The receiver shall be ...

Страница 52: ...ing pressure control is also strongly recommended to improve any system efficiency The most accurate value is to control the condensing temperature at 12 K above the ambient temperature for air cooled condensers For further information please contact Danfoss Technical support A crankcase heating will minimize refrigerant migration caused by the large temperature gradient between the compressor and...

Страница 53: ...ter into a vacuum condition It is therefore important that the expansion device be sized correctly and that a sufficient pressure differential across the expansion device be available to ensure adequate refrigerant feed into the evaporator This aspect is of special concern when operating the unit under low ambient and load conditions For further information on these conditions please refer to the ...

Страница 54: ...pressor speed to 25 30 rps before the 4 way valve is moved from a position to another Refer also to high and low pressure protection After the 4 way valve is moved to defrost position and in order to shorten the defrost period the compressor speed can be maintained at 70 rps during the defrost period When the compressor is started again after defrost it will run at 25 30 rps for a 10 seconds perio...

Страница 55: ... frequently defrost the outdoor coil in an air source heat pump In such cases a suction accumulator becomes mandatory Apart from residual moisture in the system after commissioning water could also enter the refrigeration circuit during operation Water in the system shall always be avoided Not only because it can shortly lead to electrical failure sludge in sump and corrosion but in particular bec...

Страница 56: ...the compressor s to the unit Once the supplied rubber grommets have been properly mounted vibrations transmitted from the compressor base plate to the unit are held to a strict minimum In addition it is extremely important that the frame supporting the mounted compressor be of sufficient mass and stiffness to help dampen any residual vibration potentially transmitted to the frame For further infor...

Страница 57: ...gs can be done in parameters 4 6x Speed by pass Gas pulsation The VZH scroll compressor has been designed and tested to ensure that gas pulsation has been optimized for the most commonly encountered air conditioning pressure ratios On heat pump installations and other installations where the pressure ratio lies beyond the typical range testing should be conducted under all expected conditions and ...

Страница 58: ...e use of lifting hooks closed with a clasp certified to lift the weight of the compressor is also highly recommended Always respect the appropriate rules concerning lifting objects of the type and weight of these compressors Maintain the compressor in an upright position during all handling operations Never use only one lifting lug to lift the compressor The compressor is too heavy for the single ...

Страница 59: ...ver solder and anti oxidant flux is necessary When brazing the compressor fittings do not overheat the compressor shell which could severely damage certain internal components due to excessive heating Use of a heat shield and or a heat absorbent compound is highly recommended Due to the relatively sizable tubing and fitting diameters a double tipped torch using acetylene is recommended for brazing...

Страница 60: ...Move the torch to area C only long enough to draw the brazing material into the joint but not into the compressor Remove all remaining flux once the joint has been soldered with a wire brush or a wet cloth Remaining flux would cause corrosion of the tubing Ensure that no flux is allowed to enter into the tubing or compressor Flux is acidic and can cause substantial damage to the internal parts of ...

Страница 61: ...s of the entire installation frequency converter and compressor electrical motor compressor test can be conducted together When conducting a high voltage test make sure the system is not under vacuum this may cause electrical motor compressor failure L1 L2 L3 91 92 93 U V W PE 96 97 98 99 NET MOTOR R R 81 82 01 02 03 24V DC DC 35 36 88 89 MOTOR NET 95 94 2 20 200 2000MOhm 20 ohm M ohm Gossen ISOWI...

Страница 62: ...Then during commissioning when needed a complement of charge can be done in liquid phase slowly throttling liquid in on the low pressure side as far away as possible from the compressor suction connection The refrigerant charge quantity must be suitable for both summer and winter operations Refer to news bulletin FRCC EN 050 Danfoss Commercial Compressors recommended refrigerant system charging pr...

Страница 63: ...m which needs to be adjusted in regards to the system design Oil return management function forces the compressor to rotate at 4200rpm 70 Hz for an adjustable given period of time in order to build a good refrigerant gas velocity in the system to allow the oil recovery to the compressor sump This oil management function is factory preset with the following parameters 28 10 Oil return management en...

Страница 64: ...DS303 compatibility Replace relevant part Check motor current Settings Control Comp Working load map Mains Shut off reset yes no 12 13 Commercial Compressors March 2014 2 14 Earth Fault Output side Check motor cable Correct the fault Check VZH Motor resistance and isolation Reset start Check alarm Continue 16 Short circuit Output side 30 31 32 Motor phase missing 38 Internal fault Setting Error s ...

Страница 65: ...Over temp Safe stop activated Check 24V On 12 13 terminals 24V supply to terminal 37 Turn off power Reset start Check external controls Check connections Reset start 29 Check alarm Continue 65 68 direct wire Commercial Compressors March 2014 4 DC OV Check main power supply voltage DC UV Main Failure Check power supply voltage Turn off power Reset start Reset start 7 Check alarm Continue 8 36 Too h...

Страница 66: ... U V W Start failed Minimum speed not reached after 2 sec Compressor stopped similar reason as A49 Automatic restart after 30s 10 restarts before blockage 20 possible 49 Check alarm Continue 18 Compressor stopped Compressor bearing wear 10 restarts before blockage 20 possible More information on CDS303 inverter trouble shooting checklist is described in document FRCC PC 036 ...

Страница 67: ... 0 17 2 31 7 15 9 101 0 T4 Code G 15 13 7 19 7 13 0 28 7 13 6 31 9 12 6 53 0 18 22 13 6 31 9 12 6 53 0 13 6 31 9 12 6 62 0 T6 Code G 18 5 30 13 6 31 9 12 6 53 0 Depth Height Width CD303 packaging Compressor industrial pack Compressor model Nbr Length in Width in Height in Gross Weight kg Static stacking pallets VZH088 8 45 3 37 4 26 8 1089 2 VZH117 8 45 3 37 4 29 5 1199 2 VZH170 4 1150 40 0 30 2 1...

Страница 68: ... VZH088AXBNA 120G0090 120G0092 VZH088BXBNA 120G0091 120G0093 VZH117 VZH117AXANA 120G0082 120G0084 VZH117BXANA 120G0083 120G0085 VZH117AXBNA 120G0094 120G0096 VZH117BXBNA 120G0095 120G0097 VZH170 VZH170AXANB 120G0086 120G0088 VZH170BXANB 120G0087 120G0089 VZH170AXBNB 120G0098 120G0100 VZH170BXBNB 120G0099 120G0101 Compressors industrial pack Coils Coil model Code no 208V 240V coil adaptor 120Z0521 ...

Страница 69: ...4013 VZH117 G CDS303 18 5kW IP20 H3 No 134G3579 Yes 134G3580 H2 No 134F9368 Yes 134G3581 IP55 H3 No 134G4015 Yes 134G4016 H2 No 134G4018 Yes 134G4019 VZH170 G CDS303 22 0kW IP20 H3 No 134G3582 Yes 134G3583 H2 No 134F9371 Yes 134G3584 IP55 H3 No 134G4020 Yes 134G4021 H2 No 134G4022 Yes 134G4023 LCP user interface 120Z0326 accessory VZH voltage code G 525 480 Volt Compressor model Frequency converte...

Страница 70: ...requency converter Model power IP class RFI class Code n for ordering VZH088 J CDS303 15 0kW IP20 H3 134G3474 H2 134F9361 IP55 H3 134G4001 H2 134G4002 VZH117 J CDS303 18 5kW IP20 H3 134G3585 H2 134F9363 IP55 H3 134G4003 H2 134G4004 VZH170 J CDS303 22 0kW IP20 H3 134G3586 H2 134F9365 IP55 H3 134G4005 H2 134G4006 LCP user interface 120Z0326 accessory ...

Страница 71: ...olding Single pack 1 120Z0513 VZH117 G acoustic hood VZH117 G H Single pack 1 120Z0514 VZH117 J acoustic hood VZH117 J Single pack 1 120Z0515 VZH117 G manifolding acoustic hood VZH117 G H manifolding Single pack 1 120Z0516 VZH117 J manifolding acoustic hood VZH117 J manifolding Single pack 1 120Z0517 VZH170 G acoustic hood VZH170 G H Single pack 1 120Z0519 VZH170 J acoustic hood VZH170 J Single pa...

Страница 72: ...0148 Electrical box VZH088 117 J Single pack 1 120Z0538 Electrical box VZH170 G H Single pack 1 120Z0149 Electrical box cover VZH088 G H VZH117 G H Single pack 1 120Z0150 Electrical box cover VZH170 J Single pack 1 120Z0537 Electrical box cover VZH170 G H Single pack 1 120Z0151 Electrical box cover VZH088 117 J Single pack 1 Valve Body Type Code n Description Application Packaging Pack size 120Z01...

Страница 73: ... Packaging Pack size 130B1109 Control card Frequency converter all models Single pack 1 Control card Type Code n Description Application Packaging Pack size 130B1300 Accessorry bag IP20 VZH088 J VZH117 G VZH170 G Single pack 1 130B0980 Accessorry bag IP20 VZH088 G Single pack 1 Accessory bags Type Code n Description Application Packaging Pack size 120Z0350 Relays card Frequency converter Single pa...

Страница 74: ...ions 81 Cycle rate limit of SH compressors 82 Defrost cycle logic 82 Installation and service 83 Handling 83 Compressor mounting 83 Tightening torques 83 Rubber connection 83 Tandem piping design 84 Wiring and rotation direction 84 Failure analysis 84 Oil equalisation connection 84 Refrigerant charge limit 84 Ordering information 85 VZH088 87 Compressor mounting 88 Oil equalization connection 88 S...

Страница 75: ...le speed compressor in air conditioning and heat pump applications To ensure proper parallel installation and running conditions the following recommendations must be followed It is essential to respect all instructions given in these guidelines the instruction leaflet delivered with each compressor and the Application Guidelines for single compressors For additional system components related to s...

Страница 76: ...nnovative way which is robust with any kind of upstream piping The patented 2 pieces of organ pipes are connected with standard oil equalization line The ends of them are inserted into both compressors via oil equalization port The patented organ pipe design allows for better separation of oil and gas in the oil equalization line and facilitate the balance of oil level and low side pressure betwee...

Страница 77: ... an oil management action refer to oil management specification for hybrid manifolding system for details to ensure the normal oil level or protection of system An TEKLAB LC XN optical electrical level sensor is fixed on the Variable speed compressor The oil level sensor monitors the compressor oil level and sends oil level signal to an external relay provided by OEM If OEM main controller receive...

Страница 78: ...luation into consideration when defining optimized capillary size according to different air condition systems Detailed information hereafter Please note an oil separator is not 100 efficient A good system design and efficient oil management remain essential It is the responsibility of system OEM to ensure proper oil return to the compressors including the qualification of all possible operating m...

Страница 79: ...print LxW mm x mm 237 5x128 H1 Height mm 420 H2 Height mm 589 H Height mm 612 Capillary tube VZH088 SH120 mm mm VZH ID Ø1 6 1400 SH ID Ø1 4 1400 VZH117 SH140 mm mm VZH ID Ø1 8 1500 SH ID Ø1 4 1200 VZH117 SH184 mm mm VZH ID Ø1 8 1500 SH ID Ø1 6 1600 VZH170 SH180 mm mm VZH ID Ø1 8 1380 SH ID Ø1 6 1600 VZH170 SH295 mm mm VZH ID Ø1 8 1380 SH ID Ø1 8 1600 Strainer Model Danfoss Orifice Φ2 0 CE Mesh siz...

Страница 80: ...esign If the piping is customized by the customer additional test to check oil balancing must be performed Please contact your Danfoss Application Specialist for support Model Description FS 50Hz VS 100Hz FS 60Hz VS 100Hz kW TR kW TR VZH178 VZH088 SH90 68 9 19 6 73 9 21 0 VZH208 VZH088 SH120 77 7 22 1 83 7 23 8 VZH257 VZH117 SH140 97 8 27 8 105 2 29 9 VZH278 VZH117 SH161 101 6 28 9 110 1 31 3 VZH3...

Страница 81: ...The high pressure safety pressure switch shall stop all compressors Please refer to the chapter on VZH single compressors and the Danfoss SH single compressors application guidelines reference FRCC PC 007 for recommended settings Proper piping practices should be employed to ensure adequate oil return even under minimum load conditions with special consideration given to the size and slope of the ...

Страница 82: ... the compressors during off cycle The upper loop also helps avoid liquid refrigerant from draining back to the compressor when stopped Piping should be designed with adequate three dimensional flexibility It should not be in contact with the surrounding structure unless a proper tubing mount has been installed This protection proves necessary to avoid excess vibration which can ultimately result i...

Страница 83: ...s For VZH tandem systems Danfoss supply both rigid and rubber connections but only rubber connection is recommended by Danfoss For customers who prefer to configure compressor lay out on their own they could also get rigid mounting components Regarding rubber connection compressors are mounted on the base with enough stiff by grommets To have enough stiffness compressors could be mounted on the ra...

Страница 84: ...alisation line VZH088 117 1 3 4 rotolock connection allowing use of 1 3 4 1 1 8 Organ pipe and 1 1 8 oil equalisation line VZH170 2 1 4 rotolock connection allowing the use of 2 1 4 1 3 8 Organ pipe and 1 3 8 oil equalisation line Tandem piping design Wiring and rotation direction For each tandem configuration specific outline drawings are available as indicated on the following pages These drawin...

Страница 85: ...ng kit 8156138 Danfoss VZH and SH scroll compressors can be ordered in either industrial packs or in single packs Please refer to single compressor application guideline for ordering The tandem kits can be ordered with code numbers from below table Note rubber mounting kit for manifolding is the same as single compressor mounting kit Hybrid VZH088 117 VZH170 No Code number 120Z0066 8156138 14 grom...

Страница 86: ...H117 SH140 VZH117 SH161 VZH117 SH184 VZH170 SH180 VZH170 SH240 VZH170 SH295 1 Oil level monitor Electrical part 1 1 1 1 1 1 1 1 2 Organ pipe Nelico 2 2 2 2 2 3 Sleeve 1 1 8 2 2 2 2 2 4 Sleeve 1 3 8 2 2 2 5 Teflon gasket 1 1 8 2 2 2 2 2 6 Teflon gasket 1 3 8 2 2 2 7 Restrictor VZH088 SH090 1 8 Restrictor VZH088 SH120 1 9 Restrictor VZH117 SH140 VZH117 SH161 1 1 10 Restrictor VZH117 SH184 1 11 Restr...

Страница 87: ... VZH088 tandem Tandem model Composition Variable speed Fixed speed VZH088 SH090 VZH088 SH090 VZH088 SH120 VZH088 SH120 VZH SH Oil equalization 1 1 8 VZH088 SH090 Suction left 1 5 8 Discharge left 1 3 8 1 1 8 1 1 8 7 8 See detail A VZH SH 1 5 8 1 3 8 1 3 8 See detail A 7 8 Oil equalization 1 1 8 1 1 8 VZH088 SH120 ...

Страница 88: ...8 feet only for composition of VZH088 SH120 see below drawing The level of oil is naturally balanced by a 1 1 8 oil equalization line The kit 120Zxxxx includes a 1 3 4 to 1 1 8 adaptor sleeve 4 a teflon seal 5 to connect the oil line to the compressor 1 3 4 oil connector 8 The oil line is brazed to the sleeve which is inserted depth D 1 97 in into the compressor and fitted using rotolock system Th...

Страница 89: ...rs VZH088 Suction washer Due to the difference of capacities of the compressors it is essential to equalise the pressure of the sump But this oil equalisation is also function of the configuration of the suction pipe Suction washer is on fixed speed compressors or ...

Страница 90: ...essors an additionnal 0 28 inch rigid spacer must be added under the VZH117 feet only for the composition of VZH117 SH184 see below drawing Detail A 152 Mini 240 Mini Composition of VZH117 tandem Tandem model Composition Variable speed Fixed speed VZH117 SH140 VZH117 SH140 VZH117 SH161 VZH117 SH161 VZH117 SH184 VZH117 SH184 7 8 7 8 1 3 8 Discharge left 1 3 8 Suction left 1 5 8 See detail A Oil equ...

Страница 91: ... is brazed to the sleeve which is inserted depth D 1 97in into the compressor and fitted using rotolock system The organ pipe needs to be installed in the direction indicated by the label attached which will ensure best oil balance Suction washer Due to the difference of capacities of the compressors it is essential to equalise the pressure of the sump But this oil equalisation is also function of...

Страница 92: ...essor mounting Tandem model Composition Variable speed Fixed speed VZH170 SH180 VZH170 SH180 VZH170 SH240 VZH170 SH240 VZH170 SH295 VZH170 SH295 Detail A 211 Mini 319 Mini Composition of VZH170 tandem 1 1 8 2x See detail A 1 5 8 Oil equalisation 1 3 8 Suction right 2 1 8 Discharge right 1 5 8 SH180 240 295 VZH170 VZH170 0 59 inch HM 8 bolt Lock washer Flat washer Steel mounting sleeve Rubber gromm...

Страница 93: ...ction washer is on fixed speed compressors or 11 12 The level of oil is naturally balanced by a 1 3 8 oil equalization line The plastic organ pipe 1 connected to the fitting 2 is preinstalled in the compressor Oil line 3 is brazed to the sleeve 4 Then sleeve and teflon seal provided in kit 120ZXXXX are fixed on the fitting by the rotolock nut 5 Note Both the plastic organ pipe 1 and the fitting 2 ...

Страница 94: ...et supplied to Frequency converter dimensions table Page 42 Added Low voltage directive 2014 35 EU to Approvals and certificates Page 46 Updated 28 3 Crankcase heating table with Power consumption Heating DC current Page 67 68 Added Industrial pack to Packaging Ordering Information Page 71 73 Updated Solder sleeve adapter sets Lubricant Fans Control card Accessory bags in Accessories Page 78 79 Ad...

Страница 95: ......

Страница 96: ...oned us as distinct variable speed technology specialists Today we operate from engineering and manufacturing facilities spanning across three continents Danfoss Inverter Scrolls Danfoss Turbocor Compressors Danfoss Scrolls Danfoss Optyma Condensing Units Danfoss Maneurop Reciprocating Compressors FRCC PC 023 A7 22 Danfoss DCS CC 2016 04 Our products can be found in a variety of applications such ...

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