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BITZER 2nd generation 2-stage tandem R22

Bitzer Semi hermetic 2-stage tandem S66G-50.2(Y)

Semi hermetic 2-stage tandem R22 - S66G-50.2(Y)

Tandem compressors are the simplest way of connecting two compressors in parallel. Turning on and shutting off one compressor allows for a particularly effective graduation of output. Particularly for applications with load fluctuations, this allows for cost-effective and energy-efficient operation under full- and part-load with all conventional refrigerants.

  • Displacement at 1450 min-1 : 2 x 84,5 (LP) 2 x 42,3 (HP)
  • Number of cylinders : 2x6
  • Oilcharge : 9,5 dm3

With liquid subcooling 50Hz (R22)

Compressor type Cond.temp. Qo / Pe Evaporating temperature °C
[°C] -20 -25 -30 -35 -40 -45 -50
S66G-50.2(Y) 30 Qo 81600 68100 56300 45850 36650 28450 21100
Pe 35,49 32,62 29,72 26,82 23,91 21,02 18,15
35 Qo 80700 67500 55700 45400 36200 27900 20400
Pe 37,96 34,83 31,67 28,52 25,37 22,24 19,15
40 Qo 79800 66800 55200 44900 35700 27400 19720
Pe 40,43 37,02 33,61 30,20 26,79 23,39 20,00
45 Qo 79000 66100 54700 44500 35300 26900
Pe 42,89 39,19 35,52 31,85 28,15 24,40
50 Qo 78200 65500 54200 44100 34950
Pe 45,33 41,34 37,40 33,44 29,40
55 Qo 77400 64900 53800 43800
Pe 47,74 43,45 39,23 34,96

Qo - Cooling capacity [Watt], Pe - Power consumption [kW]

Without liquid subcooling 50Hz (R22)

Compressor type Cond.temp. Qo / Pe Evaporating temperature °C
[°C] -20 -25 -30 -35 -40 -45 -50
S66G-50.2(Y) 30 Qo 74300 60600 48850 38800 30200 22800 16420
Pe 29,10 27,46 25,60 23,49 21,11 18,41 15,37
35 Qo 71300 58200 46900 37200 28900 21700 15410
Pe 31,61 29,66 27,48 25,05 22,34 19,33 15,98
40 Qo 68300 55800 44950 35650 27600 20600 14420
Pe 34,10 31,90 29,43 26,67 23,59 20,18 16,41
45 Qo 65300 53300 43000 34100 26350 19550
Pe 36,56 34,17 31,43 28,33 24,83 20,90
50 Qo 62300 50900 41100 32600 25150
Pe 39,17 36,42 33,46 30,02 26,02
55 Qo 59300 48550 39250 31100
Pe 41,30 38,63 35,49 31,72

Qo - Cooling capacity [Watt], Pe - Power consumption [kW]

Compressor type Displacement at 1450 min-1 Number of cylinders Oil charge Weight Pipe connections Motor Max. operating current Max. power consumption Starting current(lockedrotor)
LP HP DL SL
dm3 Kg mm pouce mm pouce Amp kW Amp. Y/YY
S66G-50.2(Y) 2 x 84,5 2 x 42,3 2 x 6 9,5 459 2 x 35 13/8 2 x 42
2 x 54		 15/8
21/8		 380 ..420YY/3/50
440 ..480 YY/3/60		 2 x 45 2 x 24,9 2 x 116/193