The M series compressors may be delivered together with a certain number of capacity control steps according to the following logic. The available capacity control steps are identified by the following letters: A, B, C, X; “A” = 1 capacity control step, “B” = 2, “C” 3, “X” = without capacity control. The capacity control logic is of an “unloader” type: the part load operation requires the energising of the solenoid valves coils. Capacit
On request the following accessories are available: suction shut-off valve, anti-vibration dampers kit, capacity control, special motors, liquid injection kit.
The standard and/or optional electrical accessories are suitable for 230V-1-50/60 Hz. However special voltages are also available upon request
The parallel compounding of more compressors is possible.
The parallel compounding of two compressors of the same size can be made using separate equalising pipes for gas and oil. When connecting more than two compressors (same or different sizes) the use of oil regulating level devices is suggested (please consult RefComp in any case). RefComp recommends to use a by-pass start-unloading device when a star/delta motor type is used. Such a device consists in by-passing the gas between discharge and suction side via an external pipe during the first seconds of operation, resulting in a reduced resisting torque during the starting phase (contact RefComp for further information).
Low evaporating/high condensing temperatures may require the use of a liquid injection system for compressor additional cooling; the application limits of each refrigerant have to be considered.