Labconco XPert Filtered Balance Stations 3962622 User Manual
Page 45
Chapter 6: Maintaining Your Filtered Enclosure
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External Alarm allows an external signal to sound the alarm, such as a sash
open switch, or a “fail” signal from the building airflow system.
Alarm Disable allows an external signal to prevent a “low” airflow alarm from
occurring.
Night Setback allows an external signal to prevent a “low” airflow alarm from
occurring (not any different from Alarm Disable above other than the
terminology.)
Contact Labconco for ordering information on this special PCB.
Calibration
1. Ensure the flow switch and alarm circuit board are installed and
operational.
2. Allow the enclosure to operate for at least two minutes.
3. If factory installed, the monitor will alarm at 60±10 fpm with the inflow
velocity set at 90±10 fpm.
4. To change the factory setting, set the inflow velocity required by your
Safety Officer to the desired alarm condition using the speed control
adjustment procedure outlined in Chapter 6.
5. Once the alarm condition is set, use a small screwdriver to turn the
adjustment screw on the airflow switch counterclockwise (facing the
screw) until the “low” airflow red LED lights and the audible flow alarm
sounds.
6. Adjust the inflow velocity to the nominal operating point required by your
Safety Officer.
7. Over time the HEPA filter will load and eventually slow the inflow
velocity. Once the alarm condition is met, simply increase the speed
control outlined in Chapter 6 or replace the HEPA filter if the speed control
is maximized.
8. The table below lists typical alarm conditions based on normal operating
conditions. Typical alarm conditions are set at face velocities of 10 to 30
feet per minute below the normal operating conditions due to supply air
and exhaust air fluctuations, as well as room air cross drafts. Consult your
Safety Officer for proper operating speeds.
Enclosure Operating In-Flow
Speed
Alarm Condition Set Point
Speed
100 ± 10 fpm
70-90 fpm
90 ± 10 fpm
60-80 fpm
80 ± 10 fpm
50-70 fpm
70 ± 10 fpm
50-60 fpm
60 ± 10 fpm
50 fpm
- XPert Filtered Balance Stations 3962621 XPert Filtered Balance Stations 3962620 XPert Filtered Balance Stations 3962602 XPert Filtered Balance Stations 3962600 XPert Filtered Balance Stations 3962522 XPert Filtered Balance Stations 3962521 XPert Filtered Balance Stations 3962520 XPert Filtered Balance Stations 3962502 XPert Filtered Balance Stations 3962501 XPert Filtered Balance Stations 3962500 XPert Filtered Balance Stations 3940422 XPert Filtered Balance Stations 3940421 XPert Filtered Balance Stations 3940420 XPert Filtered Balance Stations 3940402 XPert Filtered Balance Stations 3940401 XPert Filtered Balance Stations 3940400 XPert Filtered Balance Stations 3940321 XPert Filtered Balance Stations 3940320 XPert Filtered Balance Stations 3940302 XPert Filtered Balance Stations 3940301 XPert Filtered Balance Stations 3940300 XPert Filtered Balance Stations 3940222 XPert Filtered Balance Stations 3940221 XPert Filtered Balance Stations 3940220 XPert Filtered Balance Stations 3940202 XPert Filtered Balance Stations 3940201 XPert Filtered Balance Stations 3940200 XPert Filtered Balance Systems 3971402 XPert Filtered Balance Systems 3971401 XPert Filtered Balance Systems 3971400 XPert Filtered Balance Systems 3971302 XPert Filtered Balance Systems 3971301 XPert Filtered Balance Systems 3971300 XPert Filtered Balance Systems 3971202 XPert Filtered Balance Systems 3971201 XPert Filtered Balance Systems 3971200 XPert Filtered Balance Systems 3961622 XPert Filtered Balance Systems 3961621 XPert Filtered Balance Systems 3961620 XPert Filtered Balance Systems 3961602 XPert Filtered Balance Systems 3961601 XPert Filtered Balance Systems 3961600 XPert Filtered Balance Systems 3961522 XPert Filtered Balance Systems 3961521 XPert Filtered Balance Systems 3961520 XPert Filtered Balance Systems 3961502 XPert Filtered Balance Systems 3961501 XPert Filtered Balance Systems 3961500 XPert Filtered Balance Systems 3950422 XPert Filtered Balance Systems 3950421 XPert Filtered Balance Systems 3950420 XPert Filtered Balance Systems 3950402 XPert Filtered Balance Systems 3950401 XPert Filtered Balance Systems 3950400 XPert Filtered Balance Systems 3950322 XPert Filtered Balance Systems 3950321 XPert Filtered Balance Systems 3950320 XPert Filtered Balance Systems 3950302 XPert Filtered Balance Systems 3950301 XPert Filtered Balance Systems 3950300 XPert Filtered Balance Systems 3950222 XPert Filtered Balance Systems 3950221 XPert Filtered Balance Systems 3950220 XPert Filtered Balance Systems 3950202 XPert Filtered Balance Systems 3950201 XPert Filtered Balance Systems 3950200