Danfoss PSH051 Application Manuallines Download Page 44

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Application guidelines

FRCC.PC.021.A5.22

Installation

Parallel mounting feet

Tandem kit code numbers

For parallel mounting, rubber grommets and
spacer must be installed below the rails.

These parts are included in the tandem of trio
accessory kit code number 7777xxx described
below.

Tandem piping design recommendations, applicable to all tandem configurations.

When different compressor models are installed
in parallel, in order to balance compressor sump
pressures, it is necessary to use a suction washer

in one of the compressor. This suction washer
is supplied within kits described below. It must
always be installed on compressor 1.

Oil equalisation

1”3/8

Suction

right 2”1/8

Discharge

right 1”3/8

1”5/8

Compressor 2

Compressor 1

1”1/8 (2x)

Suction left

Discharge

left 1”3/8



Grommet sleeve



Flat washer



Rubber washers



Tandem grommet





Rigid spacers



Tandem rail

Included in kit 7777xxx

Supplied with the compressor

Not supplied





HM10x100

tightening

torque

32.4lbf.ft









Tandem model

Compressor 1

Compressor 2

Suction washer (restrictor) kit

Outline drawing

Code nb for ordering

Reference

Diameter (in)

PSH104

PSH051

7777041

Not needed

8556121

PSH115

PSH051

PSH064

7777037

5311570P01

1.22

8556148

PSH130

PSH064

7777041

Not needed

8556122

PSH128

PSH051

PSH077

7777048

5311579P05

1.14

8556148

PSH141

PSH064

PSH077

7777037

5311579P01

1.22

8556148

PSH154

PSH077

7777041

Not needed

8556123

Summary of Contents for PSH051

Page 1: ...Danfoss scroll compressors PSH051 to 077 50 60 Hz R410A Application guidelines http danfoss us com ...

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Page 4: ...rical box knock out dimensions 17 IP rating 17 Electrical box temperature 17 Approval and certifications 18 Approvals and certificates 18 Pressure equipment directive 2014 68 EU 18 Low voltage directive 2014 35 EU 18 Machines directive 2006 42 EC 18 Electromagnetic compatibility directive 2014 30 EU 18 Operating conditions 19 Refrigerant and lubricants 19 Motor supply 19 Compressor ambient tempera...

Page 5: ...tarting sound level 41 Running sound level 41 Stopping sound level 41 Installation 42 Compressor handling and storage 42 Compressor mounting 42 Parallel mounting 43 Tandem rails configuration 43 Trio rails configuration 43 Compressor holding charge 45 System cleanliness 46 Tubing 46 Brazing and soldering 46 System pressure test 48 Leak detection 48 Vacuum evacuation and moisture removal 48 Filter ...

Page 6: ... heat pump applications Beside scroll elements pressure ratio optimization PSH includes 2 major new technologies liquid injection and Operating Control System OCS PSH scroll compressor is also equipped with several prewired devices such as discharge temperature sensor surface sump heater SSH and Liquid Injection Valve LIV Discharge Temperature Sensor Operating Control System OCS Motor protection L...

Page 7: ...3437 17 17 10 55 7 20 13 89 1398 227 238 PSH064 4 223485 152502 21 58 10 31 7 06 17 46 1759 227 336 PSH077 4 274072 187887 25 98 10 50 7 24 21 03 2119 227 354 60Hz PSH051 4 218625 148246 20 62 10 55 7 20 13 89 1688 227 238 PSH064 4 268406 183157 25 91 10 31 7 06 17 46 2122 227 336 PSH077 4 328034 225464 31 18 10 48 7 24 21 03 2557 227 354 Conditions Evaporating temperature 19 4 F Condensing temper...

Page 8: ...34 40 154 105 768 34 01 132 799 35 08 164 983 36 32 203 174 37 76 248 259 39 40 295 427 41 06 Tc F Heating Btu h Pe kW Heating Btu h Pe kW Heating Btu h Pe kW Heating Btu h Pe kW Heating Btu h Pe kW Heating Btu h Pe kW Heating Btu h Pe kW Heating Btu h Pe kW Heating Btu h Pe kW Te F 20 10 0 10 20 30 40 50 59 PSH051 4 70 99 863 9 01 121 502 9 52 147 372 10 15 177 986 10 91 213 925 11 82 255 666 12 ...

Page 9: ...9 154 126 894 40 82 159 352 42 09 197 986 43 58 243 823 45 31 297 918 47 28 354 505 49 27 Tc F Heating Btu h Pe kW Heating Btu h Pe kW Heating Btu h Pe kW Heating Btu h Pe kW Heating Btu h Pe kW Heating Btu h Pe kW Heating Btu h Pe kW Heating Btu h Pe kW Heating Btu h Pe kW Te F 20 10 0 10 20 20 30 30 40 40 50 50 59 59 PSH051 4 70 119 932 10 82 145 904 11 44 176 997 12 19 213 788 13 10 256 928 14 ...

Page 10: ... 69 24 29 8 19 8 08 11 85 5 66 13 60 17 09 9 29 7 05 10 16 13 90 60 8 60 7 20 7 68 6 73 10 11 6 63 3 22 12 14 60 4x holes Ø 0 76 2 993 62 Rigid spacer x 4 20 9 0 05 Ø 10 47 HM 8 bolt Lock washer Flat washer Rigid spacer Nut Nut 1 16 inch HM 8 bolt Lock washer Flat washer Steel mounting sleeve Rubber grommet Nut 1 10 inch Compressor base plate ...

Page 11: ...ck washer Flat washer Rigid spacer Nut Nut 1 16 inch HM 8 bolt Lock washer Flat washer Steel mounting sleeve Rubber grommet Nut 1 10 inch Compressor base plate Ø 13 12 Ø 12 52 27 28 24 96 8 19 7 96 11 85 3 13 60 11 6 64 8 03 7 68 7 20 60 10 8 60 17 17 9 37 10 16 14 06 7 05 3 21 12 14 60 4xhole Ø 0 76 3 62 Rigid spacer x4 5 63 19 37 0 05 ...

Page 12: ...k washer Flat washer Steel mounting sleeve Rubber grommet Nut 1 10 inch Compressor base plate Ø 13 12 20 64 0 05 Ø 12 52 4x holes Ø 0 76 28 56 26 23 8 19 7 96 11 85 5 63 3 62 3 Rigid spacer x4 13 60 11 7 68 8 03 17 17 9 37 7 05 10 16 14 06 3 21 12 14 60 6 64 7 20 60 60 8 10 HM 8 bolt Lock washer Flat washer Rigid spacer Nut Nut 1 16 inch ...

Page 13: ... 1 4 1 3 8 or 2 1 4 1 5 8 sleeve This connection must be used to mount the oil equalisation line when two or more compressors are mounted in parallel please refer to section Parallel mounting for details The oil drain connection allows oil to be removed from the sump for changing testing etc The fitting contains an extension tube into the oil sump to more effectively remove the oil The connection ...

Page 14: ...er can be applied to reduce starting current The MCC is the current at which the motor protection trips under maximum load and low voltage conditions This MCC value is the maximum at which the compressor can be operated in transient conditions and out of the application envelope Above this value the OCS will cut out the compressor to protect the motor The max operating current is the current when ...

Page 15: ...to the compressor terminals by Ø 3 16 4 8 mm screws The maximum tightening torque is 2 2 ft lb Use a 1 4 ring terminal on the power leads The compressor must be connected to earth with the 0 20 inch earth terminal screw The Operating Control System OCS can be supplied with 230V For 230V OCS earth connection must be done with a 1 4 faston terminal To avoid personal injury earth continuity must be c...

Page 16: ... OCS protection cover The compressor comes with prewired OCS connections for discharge gas temperature sensor DGT surface sump heater SSH motor protection phase monitoring liquid injection valve LIV Note that to avoid handling and transportation issues the discharge gas temperature cable is not connected to the discharge temperature sensor that is pre installed on the upper shell This cable has to...

Page 17: ...cle timer 3 min 180 s External overload protection F2 Pump down pressure switch LP High pressure safety switch HP Control device TH Liquid line solenoid valve LLSV Fused disconnect Q1 Compressor motor M Thermistor chain S Safety pressure switch LPS A1 A3 A2 LP LPS M S OCS Wiring diagram with pump down cycle M1 M2 A1 A3 A2 OCS S KS LPS Control circuit Wiring diagram without pump down cycle M1 M2 Th...

Page 18: ...n Directive All PSH models UL Underwriters Laboratories All 60 Hz PSH models Other approvals certificates Contact Danfoss Products PSH051 to 077 Manufacturer s declaration of incorporation Contact Danfoss Products PSH051 to 077 Declaration of conformity Contact Danfoss Products Internal free volume without oil inch3 PSH051 1891 PSH064 1989 PSH077 2093 Products PSH051 PSH064 PSH077 Refrigerating fl...

Page 19: ...as more compact and lighter systems Polyolester oil POE is miscible with HFC s while mineral oil is not but has to be evaluated regarding lubrication ability in compressors POE oil has better thermal stability than refrigerant mineral oil POE is more hygroscopic and also holds moisture tighter than mineral oil It also chemically reacts with water leading to acid and alcohol formation PSH scroll co...

Page 20: ...ponse temperature resistance 2 750 Ω a 5 minutes time delay is activated After this delay has elapsed the relay is once again pulled in i e contacts M1 M2 are closed The time delay may be cancelled by means of resetting the mains Compressor protection Overheating overloading protection LED1 red displays the board general status LED2 yellow displays the motor protection status LED1 displays the boa...

Page 21: ...The compressor will only operate properly in a single direction and the motor is wound so that if the connections are correct the rotation will also be correct OCS provides protection against phase reversal and phase loss at start up Apply the recommended wiring diagrams from the section Suggested wiring diagram logic The circuit should be thoroughly checked in order to determine the cause of the ...

Page 22: ...as 1 2 3 and 3 During start up or defrost the compressor may operate outside this envelope for short periods Transient conditions areas 2 1 2 2 2 3 3 are allowed and also monitored by the OCS see table below for details Transient conditions 20 0 20 40 60 80 100 120 140 160 40 30 20 10 0 10 20 30 40 50 60 70 80 90 100 110 120 130 Evaporating temperature F Condensing Temperature F 2 1 2 2 4 3 4 2 3 ...

Page 23: ...ART value back to normal range then automatic reset and manual reset after 4 repeated occurences in 24h 2100h WARNING W35 2100h low pressure difference Max duration exceeded Area 3 WARNING W50 Compressor back to starting area stop in 3 min 3 min ALARM A36 compressor outside envelope compressor stopped ACTION stop the compressor RESTART back to normal range then automatic reset and manual reset aft...

Page 24: ...e is closed when the compressors is idle Liquid injection valve accessory is available refer to accessories list for code numbers An additional solenoid valve has to be installed in case of power shortage to prevent from liquid to come back to the compressor Only one solenoid valve per unit is required This solenoid valve must be a normally closed NC valve and a direct operation valve If discharge...

Page 25: ...compressor Pressure transducers LP 1 on compressor OR via comm bus Voltage out of sensor operating pressure range 0 1 4 9 V OR broadcasting not available via CAN Bus ALARM A15 Low Pressure transmitter error Auto search for alternative sensor on the manifold else STOP the compressor RESTART sequence value back to normal range then automatic reset Pressure transducers HP 1 on compressor OR via comm ...

Page 26: ...compressor High pressure safety switch shall be tested on the unit and this test may be in conflict with OCS reliability protection in the case of HP switch setting is higher than Pdisch_limit 663 psi a During this test the alarm A36 and consecutively the opening of M1 M2 switch shall not be considered to validate the HP switch setting HP LP Relief valve Deep vacuum operations of a scroll compress...

Page 27: ...ees a minimum compressor running time of 2 minutes so as to provide for sufficient motor cooling after start up along with proper oil return Note that the oil return may vary since it depends upon system design There must be no more than 12 starts per hour a number higher than 12 reduces the service life of the motor compressor unit A three minute 180 sec time out is recommended Please contact Dan...

Page 28: ...follow First In First Out FIFO rules A total capacity of 3000 lines is available A definite storage file running as a counter will record the following data Each alarm Each event Surface sump heater on off Compressor on off Liquid injection valve closing The storage period is minimum 3 years for each data MMIGRS and MMIMYK are electronic user interfaces used to communicate with OCS MMIGRS is a rem...

Page 29: ...u allows to choose between different types of data transfer and to transfer data from OCS to a SD card MMIMYK recovers data Connect MMIMYK to the OCS via RJ11 cable Power off the OCS Power on it Data will be transferred to a file in SD card This file can be translated in csv file thanks to a specific application Please contact Danfoss Technical Support for any additional information MMIMYK can be ...

Page 30: ... to 4 are for compressor identifiant the 3 last dipswitches 5 to 7 are for circuit rack identification Below tables give examples The dipswitch address is read as NodeID at power up and changed if address is valid 1 to 125 Compressor NodeID must be changed to have individual address There are two ways to change the compressor address Dipswitches on OCS recommended NodeID from MMIMYK Dipswitches on...

Page 31: ...mitters on one of the OCS of the compressors rack This ensures a fast reactivity regarding compressors protection with a polling time of 1 second The other OCS of the compressors rack will receive pressure information via broadcasting through the CAN connection In this case the unit controller can access to the pressure information through Modbus Unit type is psi absolute scaled x10000 174000 equa...

Page 32: ...ture 0x3902 14594 Te_x10 Calculated evaporatinging temperature 0x3903 14595 Liq_Ctrl_ref_x10 Injection control temperature 0x3906 14598 Liq_Ctrl_error_x10 Injection control error 0x3907 14599 Liq_valve_OD_x10 Valve opening degree 0x3908 14600 Map_pos Possition on operating envelope area 0x3909 14601 MaxDischargeTemp_log Max discharge temperature time counter 0x390A 14602 MinSucPressure__log Min su...

Page 33: ...High compression ratio cpr stopped 0x321F 12831 Warning W32 W32 336h High compres ratio Max duration ex 0x3220 12832 Warning W33 W33 Low pressure difference stop in 3 min 0x3221 12833 Alarm A34 A34 Low pressure difference cpr stopped 0x3222 12834 Warning W35 W35 2100h Low pressure diff Max duration ex 0x3223 12835 Alarm A36 A36 Compressor outside envelop cpr stopped 0x3224 12836 Warning W38 W38 Cp...

Page 34: ...eate too high pressure drops or since in R410A systems the negative impact of high pressure drops on the system efficiency is stronger than in R22 R407C systems 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 whi...

Page 35: ...uch liquid refrigerant accumulates in the sump it will saturate the oil and lead to a flooded start when the compressor starts running again the refrigerant evaporates abruptly under the sudden decrease of the bottom shell pressure causing the oil to foam In extreme situations this might result in liquid slugging liquid entering the scroll elements which must be avoided as it causes irreversible d...

Page 36: ... down allows to store all the refrigerant in the high pressure side circuit On unitary or close coupled systems where the system refrigerant charge is expected to be both correct and definable the entire system charge may be stored in the condenser during pump down if all components have been properly sized Other application needs a liquid receiver to store the refrigerant Receiver dimensioning re...

Page 37: ...t all operating conditions described before The oil level of idle compressors may disappear in the oil sight glass The oil level must retrieve a visible level in all compressors after the unit is stopped Oil level top up might be necessary to retrieve a visible oil level in the sight glasses Always use a Danfoss oil from new can see section accessories On units working 100 load continuously a comp...

Page 38: ... In air cooled machines cycling the fans with a head pressure controller will ensure that the fans remain off until the condensing pressure has reached a satisfactory level Variable speed fans can also be used to control the condensing pressure In water cooled units the same can be performed using a water regulator valve that is also operated by head pressure thereby ensuring that the water valve ...

Page 39: ...uire specific precautions for ensuring a long compressor life and satisfactory operating characteristics Regardless of the refrigerant charge in the system specific tests for repetitive flood back are required to confirm whether or not a suction accumulator needs to be installed The following considerations cover the most important issues when dealing with common applications Each application desi...

Page 40: ...r Defrost and reverse cycle gas to collect and to reduce the pressure peak during the time it takes for the valve to change position At the same time it is important that the selection and sizing of the reversing or 4 way valve ensure that the valve switches quickly enough to prevent against too high discharge pressure and nuisance high pressure cutouts Check with the valve manufacturer for optima...

Page 41: ...ttle increased start up transient sound If a compressor is miswired the compressor will run in reverse Reverse compressor rotation is characterized by an objectionable sound To correct reverse rotation disconnect power and switch any two of the three power leads at the unit contactor Never switch leads at the compressor terminals Starting sound level Bottom insulation delivered together with the c...

Page 42: ...stallation never use the lift rings on the compressor to lift the installation The risk is run that the lugs could separate from the compressor or that the compressor could separate from the base frame with extensive damage and possible personal injury as a result Never apply force to the terminal box with the intention of moving the compressor as the force placed upon the terminal box can cause e...

Page 43: ...mended rails configuration Danfoss Commercial Compressors does not supply the rails described here 1 18 3 70 17 86 17 86 6 x M8 nuts 19 69 4 x Ø 0 98 Ø 0 39 11 11 11 8 69 57 80 57 75 8 69 3 70 1 18 17 86 17 86 38 13 11 8 69 11 Ø 0 39 x 4 Ø 0 98 x 3 4 x M8 nuts 1 18 3 15 0 20 2 x 1 02 R0 47 Material steel Unit Frame must include a sufficiently strong structure at these positions to support tandem r...

Page 44: ...ust always be installed on compressor 1 Oil equalisation 1 3 8 Suction right 2 1 8 Discharge right 1 3 8 1 5 8 Compressor 2 Compressor 1 1 1 8 2x Suction left Discharge left 1 3 8 Grommet sleeve Flat washer Rubber washers Tandem grommet Rigid spacers Tandem rail Included in kit 7777xxx Supplied with the compressor Not supplied HM10x100 tightening torque 32 4lbf ft Tandem model Compressor 1 Compres...

Page 45: ... For each tandem and trio configuration specific outline drawings are available as indicated on the previous pages These drawings must always be respected No changes shall be made to the indicated tubing diameter and fitting types Minimum straight length indicated on drawings must be respected The oil equalisation line shall be made of copper tube and assembled in such a way that it does not exten...

Page 46: ... pipe work where filings and particles can not be removed System cleanliness The refrigerant compression system regardless of the type of compressor used will only provide high efficiency and good reliability along with a long operating life if the system contains solely the refrigerant and oil it was designed for Any other substances within the system will not improve performance and in most case...

Page 47: ...eeves Use only clean refrigeration grade copper tubing and clean all connections Use brazing material with a minimum of 5 silver content Purge nitrogen or CO2 through the compressor in order to prevent against oxidation and flammable conditions The compressor should not be exposed to the open air for extended periods Use of a double tipped torch is recommended Apply heat evenly to area A until the...

Page 48: ...oth the high and low pressure sides Failure to do so may result in serious personal injury Pressure gauges must be used to ensure all pressures are at atmospheric level For more detailed information on the appropriate materials required for brazing or soldering please contact the product manufacturer or distributor For specific applications not covered herein please contact Danfoss for further inf...

Page 49: ... The best location is on the liquid line between the condenser outlet and the filter drier 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 while compressor is running The refrigerant charge quantity must be suitable for both summer and winter ...

Page 50: ... motor is tested at the factory with a high potential voltage hi pot that exceeds the UL requirement both in potential and in duration Leakage current is less than 5 mA It is not recommended to repeat high voltage test hi pot on motor If this test must be carried out anyway it is mandatory to disconnect the OCS to prevent any damages or destruction PSH scroll compressors are configured with the pu...

Page 51: ...the sight glass can be influenced by the presence of refrigerant in the oil Always use original Danfoss POE oil 160SZ from new cans Top up the oil while the compressor is idle Use the schrader connector or any other accessible connector on the compressor suction line and a suitable pump See News bulletin Lubricants filling in instructions for Danfoss Commercial Compressors Commissioning The system...

Page 52: ...k Compressor model Nb Length in Width in Height in Gross weight lb Static stacking pallets PSH051 6 45 3 38 30 2 1532 2 PSH064 4 45 3 38 30 2 1451 2 PSH077 4 45 3 38 31 5 1518 2 Compressor model Length in Width in Height in Gross weight lb PSH051 30 3 23 6 35 4 260 PSH064 30 3 23 6 35 4 361 PSH077 30 3 23 6 35 4 378 ...

Page 53: ... mounted rigid spacers dedicated to parallel mounting For use in single applications the rigid spacers must be replaced by flexible grommets which are available as accessory kit 8156138 see section Accessories Compressor model OCS supply voltage Code number Motor code 4 Motor code 9 PSH051 230 V AC 120H0864 120H0904 PSH064 120H0866 120H0906 PSH077 120H0868 120H0908 Compressor model OCS supply volt...

Page 54: ... Industry pack 50 G08 8156133 Gasket 2 1 4 Models with 2 1 4 rotolock connection Multipack 10 G08 7956004 Gasket 2 1 4 Industry pack 50 Type Code n Description Application Packaging Pack size 8153124 Rotolock nut 1 3 4 Models with 1 3 4 rotolock connection Multipack 10 8153126 Rotolock nut 2 1 4 Models with 2 1 4 rotolock connection Multipack 10 Type Code n Description Application Packaging Pack s...

Page 55: ...acer sleeve for oil connect PSH051 064 PSH064 077 Single pack 1 7777048 Suction washer rigid spacer sleeve for oil connect PSH051 077 Single pack 1 Type Code n Description Application Packaging Pack size 7777039 Suction washer rigid spacer sleeve for oil connect PSH trios right suction Single pack 1 7777040 Suction washer rigid spacer sleeve for oil connect PSH trios left suction Single pack 1 Typ...

Page 56: ... OCS version PSH051 064 077 Single pack 1 Type Code n Description Application Packaging Pack size 060G5707 HP sensor PSH051 064 077 Single pack 1 060G0090 060G0008 LP sensor Single pack 1 120Z0482 DGT sensor with cable Single pack 1 061L4223 Liquid Injection Valve coil with cable Single pack 1 120Z0487 Liquid Injection Valve Single pack 1 120Z0478 Can Bus cable with cable glands PSH tandem assembl...

Page 57: ...n Page 18 Pressure equipment directive 2014 68 EU Page 26 Pressure settings Page 48 Maximum compressor test pressure high side 696 psig Page 18 Updated Pressure equipment directive 2014 68 EU Page 26 Updated pressure settings Page 48 Maximum compressor test pressure high side 706 psig ...

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Page 60: ...ioned us as distinct variable speed technology specialists Today we operate from engineering and manufacturing facilities spread across three continents Danfoss Inverter Scrolls Danfoss Turbocor Compressors Danfoss Scrolls Danfoss Optyma Condensing Units Danfoss Maneurop Reciprocating Compressors FRCC PC 021 A5 22 Danfoss DCS CC 2017 09 Our products can be found in a variety of applications such a...

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