Siemens Servo Ventilator 300, Service Manual

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62 Siemens-Elema AB E382 E380E 061 01 03 01
Description of functions Servo Ventilator 300/300A
2
Patient unit – Pneumatic
section
The Pneumatic section consists of the main
blocks 8 – 19 which are described below.
A ”mother” board, PC1607
PNEUMATIC
INTERCONNECTION
, provides signal connections
via connectors (but no electronic functions).
8 Inspiratory valve unit – Air
The inspiratory valve units for AIR and
O
2
are factory calibrated.
The adjustment potentiometer which is
situated at the top of each inspiratory
valve unit
must not be adjusted
Each inspiratory valve unit must not be
disassembled further than described in
the Operating Manual, chapter 3000
hours overhaul.
1. Bacteria filter
2. Inspiratory valve temperature sensor
3. Supply pressure transducer
4. Flow transducer (Delta pressure transducer and net)
5. Nozzle unit with valve diaphragm
6. Inspiratory solenoid with position sensor
8.1 Air inlet
The air inlet nipple is a quick-coupling where
compressed air is connected to the
ventilator. The design of the air inlet nipple
and the colour marking ring varies according
to the standard chosen.
A non-return valve for the air inlet is located
in the inlet filter cover, see 8.2
BACTERIA
FILTER
.
8.2 Bacteria filter
The
BACTERIA FILTER
protects the ventilator
from bacteria and particles in the gas
delivered to the air inlet. Service interval
3000 h of operation for exchange of the
inspiratory valve unit
BACTERIA FILTER
.
The filter housing and the filter cover is
provided with matching guide pins. These
guide pins will make it impossible to mount
the filter cover (with inlet nipple) on wrong
inspiratory valve unit.
A non-return valve for the gas inlet is located
in the inlet filter cover. This valve will
suppress short pressure drops in the gas
supply.
The non-return valve is also designed to
slowly evacuate compressed gas from the
inspiratory valve unit if the gas supply to the
ventilator is disconnected.
3
4
5
6
2
1
300-A20X