Resulting Requirements - Bitzer BSE32 Informations Techniques

Strong hygroscopicity
Polyolester oils are strongly hygroscopic and, due to
the chlorine content, require a very high degree of de-
hydration (< 50 ppm) when used with (H)CFC; this can
only be achieved in practice with a considerable effort.
Excessive moisture content leads to hydrolysis and
thereby to acid formation and copper plating resulting in
damage to the compressor.
High solubility of dirt deposits
Polyolester oils have an especially good solubility be-
haviour with regard to dirt deposits in the system. This
will increase the danger of damage to the compressor
due to detached dirt particles.

7.2 Resulting requirements

Operation with refrigerant injection (CIC)
Operation in air conditioning range (H range) and with
refrigerant injection (CIC) using single-stage com-
pressors: Use polyolester oils with increased basic vis-
cosity (BSE55 instead of BSE32).
While mounting:
• Only use pipelines and components which are clean
and dry inside (free from slag, swarf, rust, and phos-
phate coatings) and which are delivered with an air
tight seal.
• Install a generously sized drier.
• Install suction side cleaning filter.
• Handle the oil carefully: Keep oil dry. Use oil from
originally sealed containers only!
While commissioning:
• Evacuate to a high-grade vacuum.
During operation:
• Operation within controlled temperature limits only.
• Use a high capacity oil heater.
• Change the drier after approx. 100 operating hours.
Ensure with system control:
• Sufficient suction gas superheat.
• Avoid short operating periods.
• Protect against liquid slugging.
• Provide a pump down system, if necessary.
8 KT-510-6