BITZER 2nd generation 2-stage R22

Bitzer 2nd generation 2-stage S4T-5.2Y

2nd generation 2-stage S4T-5.2Y (R22)

BITZER is raising the bar in terms of technology and capacity for expanded low temperature applications with the 2nd generation of 2-stage compressors. This series is the result of extensive research on the basis of years of experience in the construction of highly efficient and solid reciprocating compressors. The gas flow control and working valves are specially adapted for low temperature applications.

  • Displacement at 1450 min-1 : 19,7 (LP) 12,6 (HP)
  • Number of cylinders : 4
  • Oilcharge : 3 dm3

With liquid subcooling 50Hz (R22)

Compressor type Cond.temp. Qo / Pe Evaporating temperature °C
[°C] -20 -25 -30 -35 -40 -45 -50
S4T-5.2Y 30 Qo 9810 8140 6660 5370 4250 3290 2470
Pe 3,85 3,64 3,40 3,15 2,88 2,58 2,27
35 Qo 9660 8010 6550 5280 4170 3220 2410
Pe 4,09 3,86 3,62 3,35 3,05 2,73 2,38
40 Qo 9510 7880 6440 5190 4100 3160 2360
Pe 4,34 4,10 3,84 3,55 3,23 2,88 2,50
45 Qo 9370 7770 6350 5110 4040 3110
Pe 4,61 4,35 4,07 3,75 3,41 3,04
50 Qo 9240 7670 6270 5050 3980
Pe 4,89 4,60 4,29 3,96 3,59
55 Qo 9120 7580 6200 4990
Pe 5,18 4,86 4,52 4,15

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
S4T-5.2Y 30 Qo 8850 6870 5510 4360 3390 2580 1910
Pe 3,84 3,56 3,27 2,97 2,67 2,35 2,03
35 Qo 8090 6570 5270 4160 3240 2460 1810
Pe 4,04 3,76 3,46 3,15 2,84 2,51 2,17
40 Qo 7740 6280 5040 3980 3090 2350 1730
Pe 4,28 3,98 3,67 3,35 3,01 2,66 2,30
45 Qo 7390 6000 4810 3810 2960 2240
Pe 4,56 4,24 3,91 3,56 3,20 2,83
50 Qo 7060 5740 4600 3640 2820
Pe 4,88 4,52 4,15 3,77 3,38
55 Qo 6740 5480 4400 3480
Pe 5,25 4,83 4,40 3,97

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
S4T-5.2(Y) 19,7 12,6 4 3 136 22 7/8 28 11/8 380 ..420YY/3/50
440 ..480 YY/3/60
14 6,9 39/68