Wet Labs ECO VSF, User Manual

Page: 20 / 32

14 ECO VSF User’s Guide (VSF) Revision AN 14 Sept. 2011
4.3 Checking Vent Plug, Changing O-Rings:
If there is fouling on the vent plug, it should be cleaned and the two 010 O-rings replaced.
Otherwise, this mechanism should be maintenance-free.
WARNING!
The pressure housing is made of plastic material that scratches easily. Do
not let the screwdriver slip and scratch the can when removing or replacing
the vent plug. Use a toothpick (something softer than the plastic) to remove
the O-rings from the vent plug.
1. Pull vent plug out about half way; hold plug while unscrewing the truss screw. When
screw is removed, pull vent plug from end flange.
2. “Pinch” bottom O-ring around vent plug to form a small gap you can work a toothpick
into. Use the toothpick to help roll the bottom O-ring off the plug.
3. Perform the same procedure with the top O-ring.
4. Clean the vent plug and vent plug hole using a dry lint-free tissue or cotton swab.
5. Lightly coat two undamaged or new O-rings with silicon grease. Install the top O-ring
(nearest to large end of plug) first, then the bottom one.
6. Insert vent plug into its hole in the end flange and hold it while inserting the truss screw.
Rotate the vent plug to begin tightening the screw. Finish tightening using a screwdriver,
being careful not to overtighten truss screw.
Note
A portion of the truss screw head has been removed to allow for venting in case of pressure
buildup.