Siemens E382 EH81E 061 01 03 02 Service Manual page 16

Description of functions
3.5 Drainage bottle
The DRAINAGE BOTTLE collects the water
that is extracted from the compressed air by
3.1 WATER SEPARATOR 1 and 3.3 WATER
SEPARATOR 2. It is a plastic container with
a screw cap into which the water hose from
the water separators is connected. There is
a ventilation hole in the cap.
3.6 Standby solenoid valve
Compressors with standby function are
equipped with a STANDBY SOLENOID
VALVE. This is an electrically controlled
three-port valve with the following function:
1.If the air pressure in the hospital central
gas supply, connected to the 4.5 COM-
PRESSED AIR INLET, is above approx.
300 kPa (3.0 bar), the standby solenoid
valve connects this inlet with the 4.1
COMPRESSED AIR RESERVOIR. The
compressor is not active.
2.If the air pressure in the hospital central
gas supply, connected to the 4.5 COM-
PRESSED AIR INLET, drops and stays
below approx. 300 kPa (3.0 bar) for a few
seconds, the standby solenoid valve
connects the 3.1 WATER SEPARATOR 2
with the 4.1 COMPRESSED AIR
RESERVOIR. The compressor starts to
supply compressed air to the reservoir.
The standby solenoid valve is controlled by
the 3.8 STANDBY PRESSURE SWITCH
via the 5.3 ELECTRICAL CONTROL
FUNCTIONS.
The standby function is further described in
section 5.7 STANDBY LAMP.
16
3.7 Low pressure switch
The LOW PRESSURE SWITCH is
connected to the 4.1 COMPRESSED AIR
RESERVOIR. This switch will activate the
pressure alarm if the air pressure in the
reservoir drops and stays below 280 kPa
(2.8 bar) for more than 10 seconds.
The pressure alarm is deactivated when the
compressor is switched off or when the
pressure in the reservoir rises above approx.
280 kPa (2.8 bar).
The pressure alarm function is further
described in section 5.8 PRESSURE
ALARM LAMP.
3.8 Standby pressure switch
Compressors with standby function are
equipped with a STANDBY PRESSURE
SWITCH. This switch will start the
compressor if the air pressure in the 4.1
COMPRESSED AIR RESERVOIR (supplied
by the hospital central gas supply via the 4.5
COMPRESSED AIR INLET) drops and stays
below 300 kPa (3.0 bar) for a few seconds.
The switch will also set the 3.6 STANDBY
SOLENOID VALVE to supply gas from the
1.6 COMPRESSOR.
The standby function is further described in
section 5.7 STANDBY LAMP.
Siemens-Elema AB
Compressor Compact
E382 EH81E 061 01 03 02