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BITZER 2nd generation 2-stage tandem

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

Semi hermetic 2-stage tandem 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 (R404A/R507A)

Compressor type Cond.temp. Qo / Pe Evaporating temperature °C
[°C] -25 -30 -35 -40 -45 -50 -55 -60 -65 -70
S66G-50.2(Y) 30 Qo 72400 62600 53200 44500 36450 29250 22950 17650 13270 9740
Pe 37,68 34,54 31,41 28,32 25,30 22,38 19,59 16,98 14,57 12,40
35 Qo 71200 61500 52200 43550 35600 28600 22500 17320 13020 9510
Pe 40,05 36,63 33,28 30,00 26,81 23,75 20,81 18,03 15,43 13,02
40 Qo 69800 60200 51000 42550 34850 28000 22100 17000 12700
Pe 42,54 38,81 35,19 31,69 28,33 25,09 22,00 19,05 16,25
45 Qo 68300 58800 49850 41600 34100 27500 21700 16620
Pe 45,03 41,00 37,13 33,40 29,83 26,41 23,13 19,99
50 Qo 66900 57500 48700 40700 33450 27000 21250
Pe 47,41 43,16 38,70 35,12 31,33 27,69 24,20
55 Qo 65800 56300 47650 39850 32800 26450
Pe 49,56 45,22 40,98 36,84 32,83 28,94

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

Without liquid subcooling 50Hz (R404A/R507A)

Compressor type Cond.temp. Qo / Pe Evaporating temperature °C
[°C] -25 -30 -35 -40 -45 -50 -55 -60 -65 -70
S66G-50.2(Y) 30 Qo 63600 53000 43550 35150 27800 21550 16370 12170 8860 6300
Pe 35,83 31,76 28,05 24,69 21,68 18,98 16,59 14,50 12,68 11,13
35 Qo 60200 50000 40950 32950 26050 20200 15350 11430 8310 5880
Pe 37,02 32,98 29,25 25,82 22,69 19,86 17,32 15,07 13,12 11,45
40 Qo 56500 46850 38300 30750 24300 18860 14360 10690 7720
Pe 38,23 34,28 30,54 27,04 23,79 20,80 18,08 15,66 13,54
45 Qo 52600 43550 35550 28600 22600 17560 13360 9890
Pe 39,49 35,63 31,89 28,32 24,93 21,77 18,86 16,24
50 Qo 48550 40150 32800 26400 20900 16230 12310
Pe 40,81 37,01 33,27 29,62 6,10 22,76 19,65
55 Qo 44150 36600 29950 24100 19130 14840
Pe 42,21 38,42 34,64 30,90 27,26 23,75

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