Filling Refrigerant - Bosch ACS 652 Repair Instruction

en 20 | ACS 652 | Service phases
8.8

Filling refrigerant

i
The refrigerant in the internal refrigerant cylinder is
used for filling the vehicle air conditioning system.
i
Refrigerant can only be added to a vehicle air condi-
tioning system under a vacuum. The vacuum phase
must therefore be performed before filling.
M2
EVHP1
T2
M1
T1
EVLP1
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
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1 689 975 257 2019-05-15
EVHP2
EV10
P1
EVLP2
VU3
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
i
Open EVHP1, EVHP2, EV 3 and EV 6.
Refrigerant flows from the internal refrigerant cylin-
der through valves V 4 and V 2, through the solenoid
valves EVHP1, EVHP2, EV3 and EV6
i
The filling quantity is checked by the scales (8),
which end the filling process after the quantity previ-
ously entered in the service process.
EV9 EV8 EV1
VU1
11 1
12
3 F1
SERVICE PORT
V1
10
8
EV3
EV5
EV6
2
P
V5 V6
V3 V4 V2
7
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
Robert Bosch GmbH
M3