624074/07 1-25
Figure 1-11. Rear of ventilation unit
1 Fan filter
2 Serial number label
3 Power switch
4 High-pressure air inlet, DISS or NIST fitting
5 High-pressure oxygen inlet DISS or NIST fitting (for heliox
option, see section 2.13)
6 High-pressure gas water trap with filter
7 Reservoir pressure relief valve exhaust
8 Communications interface connectors (COM1, COM2)
9 Power cord with retaining clip
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