Standard equipment
oil pump
oil sight glass
Rotalock valves
thermal protections
Optional equipment
additional header cooling
oil pressure switch
crankcase heater
unload starting
capacity control
Application
high, medium and low temperatures
(R22 from 12,5 ºC to -50 ºC)
(R404A/R507 from 7 ºC to -50 ºC)
(R134a from 12,5 ºC to -20 ºC)
(R407A from 7 ºC to -45 ºC)
The 4S, 6S & 8S compressors have an internal capacity control,
they work on the principle of blocking the suction
gas passage to two or more cylinders. They require the use of a
special cylinder head and a control valve with
solenoid coil. These items may be ordered installed at the factory
or in a kit form for later installation.
The suction port of the valve plate will be closed by a control
piston (blocked suction). To prevent transport damage
the solenoid valve is supplied loose and the cylinder head is
fitted with a shipping plate, therefore the shipping plate
with gasket must be removed and the solenoid valve with new gasket
mounted. Do not put the compressor into
operation with the shipping plate this could result in erratic
operation of the control piston and inadequate cooling
capacity.