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Chapter 6: Maintaining the Protector Filtered Hood
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Original instructions
Partial Filter Replacement Procedure
This procedure will be needed to perform a partial replacement. When replacing
the saturated primary filters, rotate the secondary down as the new primary and
place the new filters on top of the fans at the secondary level.
We recommend the following:

We recommend that you follow all your existing lab safety protocols as they
apply to this procedure.

That you have another person to assist you if possible.

Refer to the GFH tool list to be sure to have any needed tools on hand.

Please read through it thoroughly before you attempt it.
Items Needed:

6ft ladder

Marker & or white out

Any OEM partner tools to remove front panels

Administrator card
Overview of Procedure
1. Remove front panels to expose the filters.
2. Identify your Model, either a M1 (3'), M2 (4'), M3 (5'), M4 (6') or M5 (8').
3.
Mark your Primary filters “used” and secondary filters “primary.”
4. Turn off the hood.
5.
Select “filters” under Admin menu of control module.
6.
Select “partial replacement” in the filters menu.
7. Take off secondary filters and unplug fans.
8. Remove the fans.
9.
Remove your old primary filters that you marked “used.”
10.
Scan out old primary filters marked “used.”
11. Scan in your new filters.
12.
Install your filters that you marked “primary” earlier as your primary filters.
13. Place fans back on top of the primary filters.
14. Connect the fan wires and tubing.
15. Recheck all your connections.
16. Enter your filter lifetime as stated in your LP report or you can enter the two year
max which is 730 days.
17. Turn on and test hood.
18. Install your new filters on top of your fans at your secondary level.