Chapter 6: Maintaining the Ductless Enclosure
Product Service 1-800-522-7658
42
Install Carbon Filters and/or HEPA Filters
Refer to the instructions in
Chapter 3
on filter installation during startup.
Set Filter Life and Filter Check Timers
Refer to the instructions in
Chapter 3
on setting the Filter Life and Filter
Check Life Timers. Refer to the Filter Setup menus in
Chapter 5
.
HEPA Filter Leak Test
Purpose
After installing the new HEPA filter, the HEPA filter can be leak checked.
This test is performed to determine the integrity of the HEPA filter, the filter
housing, and the filter mounting frames. Leak testing is to be done by a
qualified technician with calibrated equipment. Leak check testing is
performed as a downstream average above the perforated exhaust cover
above the motorized impeller. The filter passes the leak test at .01% or
better. Reference Leak Testing and Photometer scanning from the Institute
of Environmental Services (IES-RP-CC001.3)
Apparatus
1.
An aerosol photometer ATI model 2D, 2E, 2G or equivalent
. Air
Techniques Hamilton Associates inc. 11403 Cron Ridge Dr. Owings
Mills, MD 21117
2.
One aerosol generator of the Laskin nozzle(s) type
. An aerosol of
mineral oil or suitable liquid shall be created by flowing air through it.
The compressed air supplied to the generator should be adjusted to a
pressure of 10± 1 psig. during operation. Air Techniques Inc. Model
TDA-4A or equal. One nozzle at 10 psig is (67.5 cfm x 100ug/l)/(Vol. of
air), For the 2' at 80 fpm or 115 cfm, one nozzle @10 psig is 6,750/115
cfm = 59 ug/l. For the 3' at 80 fpm or 230 cfm, one nozzle @ 10 psig is
29 ug/l. For the 4' at 80 fpm or 305 cfm, one nozzle at 10 psig is 22 ug/l.
For the 5' at 80 fpm or 295 cfm, one nozzle at 10 psig is 23 ug/l. For the
6' at 80 fpm or 230 cfm (two impellers draw 465 cfm), one nozzle at 10
psig is 29 ug/l.
3.
Mineral oil
(Catalog #1491400).
4.
Sampling Nozzle, Rectangular
1/2" x 3
-
1/4", Air Techniques, Inc.
