Separating And Returning Compressor Oil - Bosch ACS 652 Repair Instruction

8.9 Separating and returning compressor
oil
i
During the recovery phase and preparation of the
refrigerant, small quantities of compressor oil get
into the internal circuit.
M2
EVHP1 EVHP2
T2
M1
T1
EVLP1 EVLP2
R2
R1
HOSE FLUSH MANIFOLD
F2
6
C
Name Description
1 Fresh oil tank
2 Vacuum pump
3 Expansion valve
4 Evaporator/oil separator
5 Compressor oil separator
6 Compressor
7 Internal refrigerant cylinder
8 Refrigerant cylinder scales
9 Used oil bottle
10 Heat exchanger
11 UV dye bottle
12 Fresh oil scales
13 Used oil scales
EV1 Vacuum solenoid valve
EV3 Flow solenoid valve
EV5 Recovery solenoid valve
EV6 Filling solenoid valve
Robert Bosch GmbH
EV10
P1
VU3
11
P2
HP
VU2
5
4
EV7
9
13
Name Description
EV7 Oil drain solenoid valve
EV8 Oil injection solenoid valve
EV9 Contrast medium injection sole-
noid valve
EV10 Solenoid valve for separating
high and low pressure
EVHP1 High pressure solenoid valve
EVHP2 High pressure solenoid valve
EVLP1 Low pressure solenoid valve
EVLP2 Low pressure solenoid valve
F1 Coarse filter
F2 Combi filter
HP High pressure
LP LOw pressure
M1 Low pressure gage
M2 High pressure gage
M3 Internal refrigerant cylinder pres-
sure gage
Service phases | ACS 652 | 21
i
This oil is separated from the refrigerant in the com-
pressor oil separator (5) and is then fed back to the
compressor (6).
EV9 EV8 EV1
VU1
1
12
3 F1
SERVICE PORT
V1
10
EV3
EV5
2
P
V5 V6
V3 V4 V2
7
8
Name Description
P1 Pressure sensor
P2 Pressure switch
R1 Low pressure flushing connection
R2 High pressure flushing connection
T1 Low pressure hose
T2 High pressure hose
V1 Tank vapour side hose valve
V2 Tank liquid side hose valve
V3 Tank vapour side valve
V4 Tank liquid side valve
V5 Safety valve
V6 Non condensable drain valve
VU1 Oil non-return valve
VU2 One-way valve
VU3 UV contrast medium non-return
valve
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1 689 975 257
en
EV6
M3
2019-05-15