Air Purge - Bosch ACS 553 Service Manual

ACS 553, ACS 563 Service Manual
Manifold
Service
Port
Recover Check
(T4)
Valve
(VU3)
Manifold
Flush Port
Check Valve
(VU5)
High Side
Low Side
Flush
Flush
AIR PURGE PROCESS
The air purge solenoid is activated to release excess pressure from the internal storage vessel (ISV). The tank liquid
solenoid opens to check LS transducer pressure value (see application chart). The air purge will occur when the
machine is on and idle for 5 minutes.
ON/OFF (I/0) button must be pressed and held to continue purging incondensable gas from tank. The unit will only
allow user to purge 45 seconds at a time.
Robert Bosch GmbH
Accum
Press
(P2)
Transducer
System Oil
Separator
Oil Drain
Solenoid
Filter / Drier
valve
(F2)
(S8)
Oil Drain
Bottle
Vacuum Pump
(PUMP)
Recover
Solenoid
Valve
(S11) Oil Inject
Solenoid
valve
(S14)
Oil Inject
Check Valve
(VU4)
Oil Inject
Bottle
Figure 4-12. Air Purge
Plumbing and Mechanical
Tank
Check
(VU1)
Valve
(P3)
High
Pressure
Switch
Oil
Return
Solenoid
Valve
(S13)
Compressor
(COMP)
Low Side
Press
Transducer
(P1)
Vacuum
Solenoid
Valve
(S9)
HS Inlet 2
Solenoid
valve
(S5-2)
HS Inlet 1
Solenoid
Valve
(S5-1)
High Low
Side Side
Gauge Gauge
(M2) (M1)
Low Side
High Side
Service Hose
Service Hose
(T1)
(T2)
87
Pressure

Air Purge

Relief
Solenoid
(V2)
Valve
Air
Diffuser
(S6)
Temp. Sensor
Internal
Tank
Tank Liquid
Solenoid
valve
(S7)
Tank Liquid Check
Valve
(VU2)
LS Inlet 2
Solenoid
valve
(S4-2)
LS Inlet 1
Solenoid
Valve
(S4-1)
Contamination
Port
(T3)
1 689 975 295 2021-04-13