A
PPLICATION
GUIDELINES
C
ONTENTS
F
EATURES
................................................................................................................................4
S
CROLL
COMPRESSION
PRINCIPLE
...................................................................................................5
The scroll compression process .................................................................................................................................. 5
C
OMPRESSOR
MODEL
DESIGNATION
................................................................................................6
Nomenclature ................................................................................................................................................................... 6
Label ..................................................................................................................................................................................... 6
Serial number .................................................................................................................................................................... 6
T
ECHNICAL
SPECIFICATIONS
..........................................................................................................7
T
ECHNICAL
SPECIFICATIONS
..........................................................................................................8
50 Hz ..................................................................................................................................................................................... 8
60 Hz ..................................................................................................................................................................................... 9
D
IMENSIONS
..........................................................................................................................10
MLZ/MLM015-019-021-026 .......................................................................................................................................10
MLZ/MLM030-038-045-048 .......................................................................................................................................11
MLZ/MLM058-066-076 ................................................................................................................................................12
Oil sight glass ..................................................................................................................................................................13
Schrader ............................................................................................................................................................................13
Suction and discharge connections .......................................................................................................................13
E
LECTRICAL
DATA
,
CONNECTIONS
AND
WIRING
................................................................................14
Motor voltage .................................................................................................................................................................14
Wiring connections .......................................................................................................................................................14
IP rating .............................................................................................................................................................................14
Three phase electrical characteristics.....................................................................................................................15
Single phase electrical characteristics ...................................................................................................................15
LRA (Locked Rotor Amp) .............................................................................................................................................15
MCC (Maximum Continuous Current) ....................................................................................................................15
Max Oper. A (Maximum Operating Amp) .............................................................................................................15
Winding resistance ........................................................................................................................................................16
Electrical connections ..................................................................................................................................................16
Nominal capacitor value and relays ........................................................................................................................17
Three phase .....................................................................................................................................................................17
Internal motor protection ...........................................................................................................................................18
Phase sequence and reverse rotation protection ..............................................................................................18
Voltage imbalance ........................................................................................................................................................18
A
PPROVALS
AND
CERTIFICATIONS
................................................................................................19
Approvals and certificates ..........................................................................................................................................19
Conformity to directives ..............................................................................................................................................19
Internal free volume .....................................................................................................................................................19
O
PERATING
CONDITIONS
...........................................................................................................20
Refrigerant and lubricants ..........................................................................................................................................20
Motor supply ...................................................................................................................................................................21
Compressor ambient temperature ..........................................................................................................................21
Application envelope ...................................................................................................................................................21
Maximum discharge gas temperature ...................................................................................................................23
O
PERATING
CONDITIONS
...........................................................................................................24
High and low pressure protection ...........................................................................................................................24
On/off cycling (cycle rate limit) .................................................................................................................................24
S
YSTEM
DESIGN
RECOMMENDATIONS
............................................................................................25
General ..............................................................................................................................................................................25
Essential piping design considerations .................................................................................................................25
Refrigerant charge limit ..............................................................................................................................................26
Off-cycle migration .......................................................................................................................................................26
Liquid flood back ...........................................................................................................................................................28
2
FRCC.PC.016.A1.22
