Repairing the Anesthetic Gas Module 9 Anesthetic Gas Module
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Lifting the IR Measurement Mounting Bracket
Several of the field replaceable subassemblies are mounted on the IR measurement mounting bracket,
which is a subassembly of the Anesthetic Gas Module, as shown in Figure 58.
The IR assembly mounting bracket must first be lifted and stood on end before any of the following
units can be removed or replaced:
• IR measurement assembly and sample cell.
• Solenoid valve #1.
Removal
To lift the IR Measurement mounting bracket (refer to Figure 58 and Figure 59):
1 Ensure that the module is switched off and isolated from the mains power supply. Remove the top
cover of the module.
2 Remove the cables from the cable clip.
3 Remove the connection from the gas exhaust (1).
4 Using a cross-tipped screwdriver, remove the four screws and lock washers (2) securing the IR
Measurement mounting bracket to the module.
5 Lift the IR Measurement mounting bracket and stand it carefully on its end, so that the ribbon
cables are at the bottom. The securing screws on the underside are now accessible, as shown in
Figure 59.
Replacement
To replace the IR Measurement mounting bracket (refer to Figure 58 and Figure 59):
1 Ensure that the module is switched off and isolated from the mains power supply.
2 Lay the IR Measurement mounting bracket carefully onto its 4 spacers so that the locating holes
are aligned with the threaded bores.
3 Make sure that the dampener (3), cable clamp (4) and bracket with flow restrictor (5) are in place.
Using a cross-tipped screwdriver, fit the four screws and lock washers (2) securing the IR
Measurement mounting bracket to the module.
4 Reconnect the pneumatic tubing to the gas exhaust (1).
5 Replace the power connection to the pump (where applicable) and secure the cables with the clip.
6 Replace the top cover of the module.
NOTE After replacing the IR Measurement mounting bracket, check that all flat-cable connectors are firmly
seated and show no signs of damage.
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