VESDA VLF-500-UL 7Ed Product Guide VESDA
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9.4 Aspirator Replacement
Note: Prior to replacing the aspirator advise the monitoring authority that power will be removed and the
system disabled.
Precaution: Electrostatic discharge precautions need to be taken prior to removing the front cover from the
detector.
Aspirator removal (assumes normal mounting, refer to Figure 9-3):
1. Disconnect power to the detector.
2. Push in the security tab and lift up the field service access door.
3. Unscrew the two front cover retaining screws, lift and swing down the front cover.
4. Only disconnect the fan wiring loom from the connection point (E) at the aspirator.
5. Undo the retaining screw on the aspirator (A).
6. Swing out the aspirator, then lift and remove it from the detector.
Notes:
l Any time the aspirator is removed ensure the area surrounding the aspirator is clear of dirt and debris
prior to replacement.
l Care must be taken during aspirator replacement. The aspirator must be correctly seated; this is
essential so that gaskets are not damaged or dislodged from the underside of the aspirator.
9.4.1 Aspirator Replacement Steps
1. Clip the aspirator (VSP-715) into the retaining clip (D) and swing it back into the detector.
2. Tighten the retaining screw (A) (do not over tighten).
3. Reconnect the fan loom to the aspirator (E).
4. Replace the front cover and screw it into place.
5. Close the field service access door.
6. Reconnect power to the detector.
Legend
A Aspirator securing screw
B Swing aspirator out to remove
C Aspirator
D Retaining clip points
E Fan loom connector must be
disconnected here
Figure 9-3: Aspirator replacement
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