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ESO 2 ICU Ventilator 48 User Manual
Pneumatic System
Refer to the pneumatic system diagram on the previous page.
A) Gas inlet manifold block
The Ventilator is designed to operate on a drive gas supply
of 280 to 600 kPa (41 to 87 psi) - oxygen or air, to customer
requirements.
1. Drive Gas Inlet Connector
The gas source is connected to the DRIVE GAS SUPPLY
fitting on the rear of the ventilator control unit.
The gas supply should be capable of a flow rate of 60 L/
min (average) and a peak flow rate of up to 200 L/min
for a three second period, while maintaining a minimum
pressure in excess of 310 kPa (45 psi).
2. Filter
The drive gas is filtered with a 40-micron Input Gas Filter
which protects the pneumatic components from incoming
particulate matter.
3. The Low Supply Pressure Detector
The pressure switch is set at a predetermined level
to detect a loss or reduction of the input gas source
pressure.
When the pressure falls below 235 kPa (35 psi ± 1 psi), the
LOW SUPPLY PRESSURE indicator will be displayed and
the high priority audible alarm will activate.
4. Input Pressure Regulator
Regulates the input drive gas to 260 kPa ± 21 kPa (38 psi
± 3 psi).
5. Cut-off Valve
The valve isolates the gas supply :
a) When the ventilator is switched off
b) When a fault condition occurs.
6. Airway Pressure Sensor
Connected to expiratory limb of breathing circuit.
B) Pneumatic Control Manifold Block
7. Drive Gas Proportional Valve
8. Drive Gas Flow Sensor
9. Drive Gas Pressure Sensor
10. Low Pressure Regulator
11. Patient Proportional Valve
12. PEEP pressure sensor
13. Restrictor
The restrictor allows a bleed flow of up to 2 L/min
C) Exhaust Manifold Block
14. Check Valve
15. Diaphragm Valve
16. Pressure Relief valve - set to 100 cmH2O
17. Exhaust Port The discharged gas may contaminate the
environment. Connect to an AGSS system if available.
18. Bellows drive gas outlet (to bellows assembly)
Appendix