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required if the system is assembled correctly; however, the acidity of the oil should be checked
regularly to prevent damage to the motor and compressor. Therefore, the RFC recommends
that the oil be changed after the system has been operated for 2000 hours for the first time. If
the system needs to be cleaned, do the following:
1) Install an acid removal filter in the suction line;
2) Change oil and filter
3) Clean the circuit by purging the compressor system from the highest point on the
discharge side.
Oil can be discharged through the oil outlet on the side of the oil separator and charged
through the oil filling port on the oil separator. When refueling, the oil should be sucked into the
oil separator from the oil filling port by vacuuming.
Compressor bearings have a design life of 40,000 hours with good lubrication (clean oil
filter, oil pressure in the correct range) and stable load. Any changes to the conditions
described above or excessive changes in load will shorten the life of the compressor,
sometimes significantly. Bearing replacement must be carried out in a workshop by qualified
personnel.
9.2.2 The direction of rotation of the rotor
If the reverse rotation occurs for more than 3 seconds after the compressor is turned off,
the check valve located in front of the discharge shut-off valve may be damaged, so the check
valve must be replaced. In any case, the reverse rotation must not last more than 5 seconds to
prevent compressor damage and unreasonable alarms from the protection module.
time (hours)
50-100
Oil filter
lubricating oil
Suction filter
The
electromagnetic
valve
check valve
protection
module
Input voltage
motor contact
point
Electrical
insulation
Leakage at the
joint
vibration noise
1000
C/S
C/S
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
CIS
CIS
C
c
2500
5000
C/S
C/S
s
c
c
c
c
c
c
c
c
c
c
c
c
c
c
c
CIS
CIS
c
c
10000
15000
C/S
CIS
c
c
c
c
c
c
c
c
c
c
c
c
c
c
c
c
CIS
CIS
c
c
30000
40000
CIS
s
c
s
c
c
c
s
c
CIS
c
c
c
c
c
c
c
c
C/S
CIS
c
c
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