Thermo Scientific Corona Veo, Operating Manual

Page: 189 / 262

7 • Maintenance and Service
Charged Aerosol Detectors Corona Veo (RS) Operating Manual Page 189
5. With the new gas filter assembly, mind the correct orientation for
the gas flow for installation. Observe the flow direction signs on the
filters.
♦
The bottom or inner gas filter must be the charcoal gas filter
(thick black inner filter cylinder; no. 1
in Figure 39 ).
♦
The top or outer gas filter must be the HEPA gas filter (thin white
inner filter cylinder; no. 3 in
Figure 39 ).
6. Push the new gas filter assembly into the clamps observing the
orientation signs for the gas flow on the gas filters.
Figure 39: Correct installation of the gas filter assembly
No. Description No. Description
1 Charcoal gas filter 3 HEPA gas filter
2 Elbow fittings 4 Gas filter clamps
7. Connect the gas tubes and observe the In and Out labelling on the
gas tubes:
♦ On the bottom charcoal gas filter, push the inlet gas tubing into
the (push-in) elbow fitting.
♦ On the top HEPA gas filter, push the outlet gas tubing into the
(push-in) elbow fitting.
Check that the connections are secure: Slightly pull on the tubes in
the fittings. If a tubing slides out, repeat this step.