Labconco PURICARE Procedure Station Models 34812xx - Manual (Page 160)

Page 160 of 197
Canopy Exhaust Volume Measurement
8. Remove the tape holding the exhaust relief valve(s) open and close them.
Reattach the filter access panel.
9. Turn on the external blower.
10. Using a thermal anemometer, measure the inflow velocities along the horizontal
centerline of the canopy intake slot, at points 1 inch from either end, and in the
center of the slot.
11. Adjust the exhaust damper control lever, or the remote blower speed until the
average inflow velocity through the canopy equals the specified value in the
table below. Mark the position of the damper handle.
12. Now slowly close the damper until the average intake velocity through the slot
equals the alarm setpoint noted in the table below.
13. If the LCD Display says “CANOPY ALARM”:
Turn the pressure switch adjustment thumbscrew counterclockwise (facing the
screw) until message changes to “OK”.
14. If the LCD Display says “OK”:
Slowly turn the pressure switch adjustment thumbscrew clockwise (facing the
screw) until the “CANOPY ALARM” message is displayed.
15. Replace the plug in hole of pressure switch housing.
16. Reset the damper to its correct position. The unit is now calibrated.
Cabinet Set-up for
Canopy Connection
3 ft.
8 in. sash
opening
3 ft.
10 in. sash
opening
4 ft.
8 in. sash
opening
4 ft.
10 in. sash
opening
5 ft.
8 in. sash
opening
5 ft.
10 in. sash
opening
6 ft.
8 in. sash
opening
6 ft.
10 in. sash
opening
Labconco Canopy P/N 3898000 3898000 3898001 3898001 3898002 3898002 3898003 3898003
Canopy Slot Area (F 2 ) 0.135 0.135 0.186 0.186 0.236 0.236 0.304 0.304
Nominal Canopy Slot Velocity
(FPM) 10
550 550 400 400 315 315 330 330
Nominal Canopy Slot Volume
(CFM)
75 75 75 75 75 75 100 100
Canopy Slot Velocity
Alarm Setpoint (FPM) 10
150 150 100 100 100 100 100 100
Total Exhaust Volume (CFM) 278-298 328-353 344-371 412-446 411-445 495-537 503-543 603-653
Canopy Vacuum (In. H
2
O) .15-.25 .15-.25 .15-.25 .15-.25 .15-.25 .15-.25 .15-.25 .15-.25