Envirco Isoclean UV - Manual (Page 16)

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Operation Manual
Page 12
CAUTION: Appropriate decontamination procedures (see Section 4.15 must be
followed prior to removal of the access panels to replace the HEPA filter or
other parts. Contact your Safety Office to assure it conforms to your
facility’s protocol.
4.4. Removal of Front and Rear Panels
4.4.1. Remove the front access panel by taking off the screw covers and removing the
four (4) screws. The front panel may now be lifted off.
4.4.2. Remove the 18 screws securing the rear access panel. The rear pane l may now
be lifted off.
4.5. HEPA Filter Replacement
The CDC recommends that in any application, HEPA filters should be maintained
meticulously and should be carefully installed by adequately trained personnel wearing
an appropriate respirator. A regular maintenance program should include procedures for
installation, removal and disposal of filter elements and a program to monitor the HEPA
filter for possible leakage and for filter loading.
4.5.1. The expected HEPA filter life should range from 18 months to two (2) years
depending on the environment and prefilter maintenance schedule. The filter
indicator light will give a warning of filter loading by flickering on high speed.
When the light stays on at high speed, the HEPA filter should be changed.
4.5.2. Remove the prefilter as described in Section 4.3.
4.5.3. Remove the front access panel as described in Section 4.4. Lift the panel out
and set it aside.
4.5.4. Removal of the UV Light Assembly for the lsoClean UV
4.5.4.1. Remove the five (5) screws on the left hand UV containment baffle and
the five (5) screws on the right hand containment baffle and remove the
baffle assemblies.
4.5.4.2. Disconnect the three-pin connector located near the UV lamp
ballast and remove the wires from the wire routing clamp.
4.5.4.3. Remove the four (4) screws, washers and nuts holding the UV lamp
assembly in place (the mounting channel may be removed or left in
place). Access through the exhaust grille is necessary to remove the
mounting channel. Remove the exhaust grille by pushing down and
lifting out. Carefully remove the UV lamp assembly taking care not to
touch the glass tube.
NOTE: Clean the UV light tube as necessary, using a cloth dampened with an
10% alcohol (or ammonia) and water solution, to avoid lamp
degradation due to oil and dust residues. Gloves are
required when handling UV Light (see 4.16.4).