Maintenance and Calibration
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3.6.7 Inspecting/replacing the Decoupling, Bellow and Expiratory Valves
1. To replace the Patient modules rear side valves’ membrane, undo the coupling nut.
2. After removing the valve assembly, undo the black nut securing the valve.
3. Inspect and /or replace the valve, ensuring no hole or deformity that would cause a leak.
4. Assemble in reverse order
CAUTION: During transportation of the patient module, transportation protection should be
applied at the rear to protect the valves.
3.6.8 Disassembling the Room Air, Inspiration and expiration valves
1. To dismantle the valves, the coupling ring must be unscrewed from the valve body. The valve
cover can now be removed.
2. The O-ring and the metal baskets in the expiration or inspiration valve can now be removed. The
valve plate can be removed. Assemble in reverse order.
3. The membrane of the room air valve can be carefully removed from the valve body after removing
the coupling ring and the valve cover. Assemble in reverse order.
4. The O-rings of the valve bodies have only to be exchanged if the valves were pulled out of the
Patient Module’s top.
3.6.9 Removing the Gas Block Module
1. Disconnect all sources of pressurized gas.
2. Remove the screws holding the rear access panel.
3. Remove the internal access panel containing the Gas Block.
4. Remove the screws and nuts holding the gas block to the enclosure.
5. Disconnect the gas lines running to the various connections.
6. Remove the Gas Block as a single module.
7. Reinstall the Gas Block in reverse order. Apply gas pressure and test prior to final button-up.
WARNING: An error in the tubing can lead to a serious health damage or death of the
patient. Reinsure the correct connection of the gas lines before the unit is put
back to use.
3.6.10 Removing the flow tubes
1. Remove the Gas Block Module
2. Remove the spring-loaded flow tubes by pushing it up and removing from the bottom.
3. Reinstall in reverse order.
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