Labconco PuriCare Vertical Flow Stations 3830020 - Manual (Page 34)

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Product Service 1-800-522-7658
Chapter 6: Maintaining Your PuriCare
The service operations listed in the
rest of this chapter should only be
performed by a qualified certifier.
Downflow Velocities
The average downflow velocity for all Vertical Flow
Stations should be set at 50-55 FPM.
Downflow Velocity Grid
Patterns
The downflow velocity test grid for all Vertical Flow
Stations is as follows:
The perimeter of the down test grid is 6.00 inches from
the side walls and 6.00 from the rear of the work area.
The grid consists of three rows, 5.95 inches apart, from
the back to the front, with eight test points on each row,
spaced 5.21 inches apart. All points are read at the
bottom edge of the sash.
Inflow Volume Calculation -
Primary Method
The Inflow Volume can be measured directly, using a
Direct Inflow Measurement (DIM) meter, using the
following method:
1. Turn the station off and raise the sash.
2. Remove the work surface and the lower prefilters as
described earlier.
3. Using rigid cardboard, or fiberboard, cut two
patterns as shown in Figure 6-3.
4. Place the solid pattern over the prefilter hole
directly above the blower. Seal the pattern to the
prefilter shelf with duct tape if necessary.
!