31
Exhaust System Requirements
The exhaust system must be capable of moving the following volumes of exhaust air at
the negative pressures listed. The
Airflow Volumes
are the values recorded via direct
measurement using a flow hood at the front opening of the cabinet. The
Concurrent
Balance Values
are measured in the exhaust duct via traverse methodology, and will
always be higher due to differences in volume measurement methodologies.
For Type A2 models with Ventus Canopy Connections, see Table 7-1.
For Cell Logic+ Type A2 models with Ventus Canopy Connections, see Table 7-2
For Type B2 models, see Table 7-3.
For Type C1 models operating in B-mode, see Table 7-4.
Type A2 Models
1:
Unlike Type B biosafety cabinets, the recommended vacuum will remain constant
throughout the life of the exhaust HEPA filter. Duct vacuums below 0.05 inches H
2
O
(12 Pa) or above 0.5 inches H
2
O (125 Pa) may result in erratic operation and throw an
alarm condition from the product.
2:
WC = Inches of Water Column, typically expressed in units of
inches H
2
O
.
Logic+ Type A2 Model
Airflow Volume
Concurrent
Balance Value
Recommended
Duct Vacuum
1
ft
3
/min
m
3
/hr
ft
3
/min
m
3
/hr
WC
2
Pa
3-foot, 8" Sash
263
447
289
491
0.15
38
3-foot, 10" Sash
316
537
348
591
0.15
38
4-foot, 8" Sash
333
566
366
622
0.15
38
4-foot, 10" Sash
404
687
444
754
0.15
38
4-foot, 12" Sash
474
805
521
885
0.15
38
5-foot, 8" Sash
403
685
443
753
0.15
38
5-foot, 10" Sash
491
834
540
917
0.15
38
5-foot, 12" Sash
580
985
638
1084
0.15
38
6-foot, 8" Sash
473
804
520
883
0.15
38
6-foot, 10" Sash
579
984
637
1082
0.15
38
6-foot, 12" Sash
686
1166
755
1283
0.15
38
Table 7-1
Summary of Contents for Logic+ A2
Page 149: ...149 208 240V...
Page 151: ...151 Blower only will not start...
Page 152: ...152 Lights only will not illuminate...
Page 153: ...153 UV Light will not illuminate...
Page 154: ...154 Airflow Alert activating...
Page 155: ...155 Filter Life Gauge not at 100 when new...
Page 156: ...156 Contamination in the work area...
Page 200: ...200 Figure 23 4 1 2 4 3 5 7 6 8 8...
Page 201: ...201 END OF 3849920 Figure 23 5 9 10 11 12 13...