| 18 | ACS 810 | Service phases
en
1 689 975 253
2021-01-26
|
Robert Bosch GmbH
8.6
Fresh oil filling
i
You can only fill new fresh oil into a vehicle A/C
system, if there is vacuum inside the A/C system.
So you have to start first the vacuum phase.
i
After evacuating the vehicle A/C system, recovered
oil has to be replaced with new oil. The oil
replenishing occurs by pressure difference.
1.
Open valve of service quick coupler T2.
2.
Open HP valve.
3.
Open solenoid valve EV8.
The pressure difference makes fresh oil in the
graduated bottle be sucked inside the vehicle A/C
system.
i
As buses often have huge quantities of oil (even
more than 1 kg), for the oil replenishing the
refrigerant pump (11) is also used that allows the
replenishing of the hole quantity needed.
4.
After filling fresh oil, close solenoid valve EV8 and
switch off the refrigerant pump (11).
Des. 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 scale
9
Used oil bottle
10
Heat exchanger
11
Refrigerant pump
T1
Low pressure hose
T2
High pressure hose
M1
Low pressure gage
M2
High pressure gage
M3
Internal refrigerant cylinder pressure gage
F1
Coarse filter
Des. Description
F2
Combi filter
VU1
Oil non-return valve
EV1
Vacuum solenoid valve
EV3
Flow solenoid valve
EV5
Recovery solenoid valve
EV6
Filling solenoid valve
EV7
Oil drain solenoid valve
EV8
Oil injection solenoid valve
EV10 Refrigerant pump by-pass solenoid valve
P1
Pressure sensor
P2
Pressure switch
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
M2
HIGH
LOW
P1
T1
T2
EV8
1
2
P
EV1
EV5
EV3
EV6
3
F1
C
P2
HP
5
6
F2
9
4
EV7
10
7
V1
8
V3
V2
V4
V6
V5
M1
M3
EV10
VU1
11
P
