Table Of Contents - Danfoss MLZ Evolution A Application Manuallines

Application Guidelines Content
Features ..................................................... 4
Scroll compression principle ................... 5
The scroll compression process....................................... 5
Compressor model designation .............. 6
Nomenclature ........................................................................ 6
Technical specifications ........................... 7
50Hz .......................................................................................... 7
60Hz .......................................................................................... 9
Dimensions ............................................. 11
MLZ015-019-021-026 ........................................................11
MLZ030-038-042-045-048 ...............................................12
MLZ058-066-076 .................................................................13
Oil sight glass .......................................................................14
Schrader .................................................................................14
Suction and discharge connections ............................14
Electrical data, connections and wiring 15
Motor voltage ......................................................................15
Wiring connections ............................................................15
IP rating ..................................................................................15
Three phase electrical characteristics .........................16
Single phase electrical characteristics ........................16
LRA (Locked Rotor Amp) ..................................................17
MCC (Maximum Continuous Current) .........................17
Max Oper. A (Maximum Operating Amp) ..................17
Winding resistance.............................................................17
Electrical connections .......................................................17
Nominal capacitor value and relays .............................18
Three phase ..........................................................................19
Internal motor protection ...............................................19
Phase sequence and reverse rotation protection ...19
Voltage imbalance ............................................................19
Approvals and certifications .................. 20
Conformity to directives ..................................................20
Internal free volume ..........................................................20
Operating conditions ............................. 21
Refrigerant and lubricants...............................................21
Motor supply ........................................................................23
Compressor ambient temperature ..............................23
Application envelope ........................................................23
Maximum discharge gas temperature .......................28
High and low pressure protection................................29
On/off cycling (cycle rate limit) .....................................29
System design recommendations ......... 30
General ...................................................................................30
Essential piping design considerations ......................30
Refrigerant charge limit ..................................................31
Off-cycle migration ............................................................31
Liquid flood back ................................................................33
Specific application recommendations 34
Low ambient application .................................................34
Scroll and reciprocating ...................................................34
Low load operations ..........................................................35
Brazed plate heat exchangers ........................................35
Water utilising systems .....................................................35
Sound and vibration management ....... 36
Starting sound level...........................................................36
Running sound level .........................................................36
Stopping sound level ........................................................36
Sound generation in a refrigeration system .............36
Compressor sound radiation ..........................................36
Mechanical vibrations .......................................................37
Gas pulsation .......................................................................37
Installation .............................................. 38
System cleanliness .............................................................38
Compressor handling and storage...............................38
Compressor mounting .....................................................38
Compressor holding charge ...........................................38
Tube brazing procedure ...................................................38
Brazing material ..................................................................38
Vacuum evacuation and moisture removal ..............40
Liquid line filter driers .......................................................40
Refrigerant charging .........................................................40
Insulation resistance and dielectric strength ...........40
Ordering information and packaging ... 41
Packaging ..............................................................................41
Packaging details ................................................................41
Spare parts & accessories ....................... 45
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