VESDA VLP - Page 25

VESDA VESDA Maintenance Guide
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Legend
A Filter switch connector socket
B Aspirator loom connector
C Aspirator locking fingers
D Move both locking fingers
outwards
E Aspirator (lift upwards)
Figure 8-3: Removing the HPC and Disconnecting the aspirator cable loom
8. Locate the two plastic fingers securing the aspirator to the chassis (D) in Figure 8-3 above.
9. Push fingers outwards (E) and lift the aspirator out.
10. Remove the exhaust pipe elbow and filter card assembly (A) from the aspirator (B) as shown in Figure 8-4.
Legend
A Exhaust pipe elbow with filter
card switch
B Aspirator
Figure 8-4: Removing the Exhaust Pipe Elbow and Aspirator
11. Reattach the exhaust pipe elbow and filter card assembly (A) to the aspirator (B) exhaust outlet as shown
in Figure 8-4 above.
12. Wipe the manifold outlet flange surface if dirty.
13. Slide the aspirator between the fingers until fingers lock over aspirator. Check that the aspirator does not
come off when lifted.
14. Reconnect the aspirator cable loom to the cable socket on the HPC.
15. Secure the HPC to the chassis, ensuring that the card locks under the plastic fingers.
16. Place the insulating sheet over the HPC and secure it with the screw.
17. Re-attach the air filter cartridge.
18. Re-connect the cable loom to the module on the front panel.
19. Check that all wires are secured to the connectors or terminals.
20. Power up the detector and check the aspirator is running.
21. Close the detector. Refer to Figure 8-5