The 95% and 99% filters
self-cleans by gravity-draining
to the sump pan. It will be necessary to occasionally
clean the filters if both grit and a mist are being collected.
Dry particulate can be removed from any of the pre-filter
assemblies by shaking or vacuum.
Tacky or embedded matter should be washed off in the
appropriate solvent.
Figure 6.
The Adsorption Module (AD) option is comprised of (2) refillable, finely perforated containers to hold
the
adsorption material in the air stream. As with the HEPA, it is located above the 95% filter.
The final filter configuration option available is the External Module. This external module can house either
a HEPA filter or an adsorption bank or a “DOUBLE BY-PASS” carbon fitler module. Filter access is from the top
cover of the module. The HEPA is secured with a clamping system
FILTER SERVICE
Filter service is required when a reduction of airflow (suction) is noticed, or on models so equipped,
when
the optional pressure gauge indicates a restriction.
The optional pressure gauge is calibrated as follows:
With clean filters, turn unit on and mark the pressure reading on the gauge, (see diagram included with gauge for
hook up). Make a second mark at 2.0" higher than initial reading (i.e. if initial reading is 1.0" the second mark
should be at 3.0").
Whether using a gauge or when airflow reduction is noticed, the following procedure should be followed.
1. Clean/replace pre-filter, turn unit back on, check performance. Normally, performance returns at or close to
original setting for the first several cleanings of the pre-filter.
2. If no performance improvement is evident after cleaning the pre-filter, replace or clean main filter.
3. If no performance improvement is evident after step 1 & 2, clean or replace after filter (on models so equipped.)
Page:
9/15 .
Be sure when installing filters to observe the airflow direction as noted by an arrow on the side of the filter.
The unit will not be damaged if incorrectly installed, however performance will be degraded.
