17
HEPA H14 / ULPA filters
Pre-requisites
• The operative responsible for replacing the filter is kept up-to-date with the exhaustive list of products handled in
the workstation by the user so that the correct EPI can be used.
• The laboratory is empty when the operation is carried out.
• The laboratory is ventilated by mechanical or natural means while the operation is carried out.
Minimum protective equipment
•
One-piece o ove bouffant cap
•
Laboratory gloves (latex or nitrile)
•
Protective glasses
•
Breathing mask with particle filter (P3)
Notice: additional equipment could be required.
This procedure is applicable to HEPA/ULPA filters located at the bottom of the filtration columns and designed to trap
powders handled inside the device enclosure.
Following steps must be taken chronologicaly:
1.
Switch on the device fan.
2.
Carefully spray the bottom surface of the HEPA/ULPA filter (paint with NON FLAMMABLE propellent), to be done
inside the enclosure.
3.
Allow at least 5 minutes with the fan running for the spray to dry.
4.
Shut down and unplug the device and disconnect the fan module power supply cable and the sampling tubes from
the sampling area (if installed).
5.
Carefully remove the molecular filter(s) (if present) and the fan module.
6.
Carefully unwrap the new HEPA/ULPA filter.
Keep the plastic film and cardboard box so that you can use it later to pack up the used filter.
Lay out the film on a flat surface in the immediate vicinity of the operation so that it is at the ready.
7.
Carefully remove the used HEPA/ULPA filter and immediately place it contaminated-side down onto the plastic film .
8.
Clean the filter housing and the enclosure (using water + surfactant)..
9.
Pack the used contaminated equipment up
Seal the plastic film tightly
10.
Place the sealed package in the box the new filter came in, then seal it using adhesive tape, clearly write
«usedfilter» on the packaging.
Filter must be disposed according to applicable regulations.
11.
Install the filter(s) according to your configuration (1P or 1P1C, cf. assembly instructions).
12.
Reconnect the device’s various cables and hoses, switch the device back on and check the air speed using the
anemometer calibration procedure via the adminstrator interface.