Copyright 2010 Biological Controls
8/19/2010
9
To access the UV lamps, open the filter access door and remove the pre-filter and HEPA as
described in the filter renewal process. The lamps are bi-pin type and twist in and out of the
connectors. Replace all lamps at the same time, dispose of properly.
Power the module momentarily to test the lamps.
Follow all of the Safety notices above.
If all
lamps are working remove power and reinsert the HEPA and pre-filter following the filter renewal
instructions above. Secure the swing down door, log the maintenance activity, and reactivate the
system.
6.
System Applications
6.1.
Creating A Negative Pressure Room
Negative pressure will be achieved when more air is exhausted from the room than is entering it
(CDC Guidelines state that room exhaust-flow should be either 10% or 50 cfm greater than the
supply to achieve negative pressure). The most recent guidelines call for pressure differential of
negative .010” H
2
O (W.C.) or minus 2.49 Pascal’s.
The room must be sealed well and leak-free (especially the ceiling) to create a negative
pressure environment.
This allows air to only enter the room from the opening under the door,
the corridor or a designated positive pressure area.
When exhausting directly to the outside, it is advisable to place the Blower Module as close to the
exit vent as possible. The longer the total length of the ducts and the more bends and turns in the
ducting, the higher the air flow-resistance and conversely the lower the exhaust air-volume (CFM).
To create negative pressure within a room (the room pressure is less inside the room than in the
surrounding areas) the MICOCON® EXC7 components are placed in any ceiling location that
makes it convenient for attachment to the nearest exhaust duct or outside wall. The length of all
duct-runs should not exceed 12 feet and the total duct-rise should not exceed 10 feet. Since the
exhaust-air has been filtered it is possible to exhaust directly into an air-return area above a sealed
ceiling.
