Bitzer CSH compact screw compressor

Bitzer CSH compact screw compressors are designed for water chillers, air conditioning, process cooling and heat pumps. The motor and the oil separator share the same housing: the unit is more compact and the oil circuit comes down to a few connections. The range has 50 models, from CSH65 to CSH96, from 137 to 1,120 m³/h displacement at 50 Hz and 75.1 to 651 kW with R134a.

The 50 CSH models

Bitzer cooling capacities at 50 Hz (2,900 rpm), according to EN 12900: evaporating 5 °C and condensing 50 °C at dew point, 10 K suction gas superheat, no liquid subcooling. With R1234yf, capacity is about 94% of the R134a value; with R513A, about 101%. Maximum current and power at 400 V: use them to select contactors, cables and fuses. Horsepower (HP) is calculated from the maximum power consumption given by Bitzer (1 HP = 0.736 kW).

CSH.5, CSH.6, motor 1 or motor 2

CSH.5 models (CSH65, CSH75, CSH85 and CSH95) have the widest application range. With motor 1, the most powerful, they cover air-cooled water chillers in all climate zones, heat pumps with high condensing temperatures and process cooling, with R134a, R513A, R450A, R1234yf, R1234ze(E), R515B, R407C, R407A, R407F or R22. They accept the economiser at full and part load, liquid injection and an oil cooler. Motor 2 is intended for low pressure refrigerants such as R134a: it has no R407C rating.

CSH.6 models (CSH76, CSH86 and CSH96) are optimised for low pressure refrigerants, including A2L: R134a, R513A, R450A, R1234yf, R1234ze(E) and R515B. Bitzer intends them for high efficiency water chillers in temperate and cold climates, and for data centre cooling.

The final “Y” stands for the polyolester (POE) oil charge for HFC and HFO refrigerants. Motor 1 models also exist without “Y”, with B320SH oil for R22.

Key benefits

• Dual capacity control by slider: 4 steps (100, 75, 50 and 25%) or stepless from 100 to 25%, as you choose, without modifying the compressor. Automatic start unloading.
• External frequency inverter possible, from 25 to 60 Hz.
• All integrated: oil separator, discharge check valve, economiser port; suction and discharge connections can be rotated in 90° steps.
• Motor 400 V / 3 / 50 Hz (460 V at 60 Hz): part winding start for CSH65 to CSH86, star-delta for CSH95 and CSH96.
• Other versions on request: CSHP for propane R290, CSH.EX for ATEX zones, CSW for water-cooled chillers and CSVH with integrated inverter.

Applications

Screw water chillers from 300 to 1000 kW, air conditioning of hotels, hospitals and offices, process cooling in food and plastics industries, heat pumps. For lower capacities, see our Danfoss Performer SZ scroll compressors.

See also the Bitzer HSK (air conditioning, medium temperature) and HSN (low temperature) screw compressors.

Afric Froid and Bitzer screw compressors

Afric Froid supplies Bitzer screw compressors and builds them into its screw compressor racks, housed screw condensing units and screw water chillers. We provide installation, commissioning and after-sales service in Tunisia, Algeria, Senegal and Ivory Coast. Frigo Indus is ISO 9001:2015 certified by DQS for the design, manufacture, sale, installation and after-sales service of refrigeration machines. Tell us the refrigerant, the cooling capacity and the evaporating and condensing temperatures: we select the compressor with BITZER Software and send you a quote.