LT-S-(L) Technical manual
2
）
Stepless type capacity modulation graph
Figure 3-8.Stepless Type Capacity Modulation
3
）
Stepless type control logic description
In stepless type capacity modulation system, the oil keeps going to the left side
of the piston. The oil bypass in the left side of the piston is controlled by SV3 (50%).
The oil inlet in the right side of the piston is controlled by SV1 (unload) and oil
bypass in the right side of the piston is controlled by SV5 (100%). These three
solenoid valves are controlled by temperature controller or PLC.
Through the three solenoid valves, the cooling capacity can be controlled at any
position from 50%~100%, so through periodical adjustment of SV1
、
SV3
、
SV5, the
energy output can controlled stably.
★
Note: SV2(10%) can only be used for machine start and stop. Don't run the
machine at 10% load for long time once the machine is started. It shall be switched to
load model directly.
The stepless type capacity modulation system shall be connected to the micro
controller(optional), eg. PLC etc. in order to control the system at the target working
condition.
