6.7. CONNECTING THE PRESSURE SENSORS
6.7.1. DIRTY FILTERS
The equipment is equipped with 2 pressure taps on each side of the fi lters so that a pressure
switch can be installed to control dirt levels in the fi lters. Section 9.5 presents a table with the
values recommended for fi lter replacement.
6.7.2. FAN CONTROLS
• The unit has 3 pressure taps to maintain the fan at a constant airfl ow or constant pressure.
To be able to control the fans at constant airfl ow, factor K shown in the following table must
be entered:
UTBS-2
UTBS-3
UTBS-5
UTBS-8
K=69
K=84
K=84
K=104
It is important between the two pressure taps there is the
fi ltration step, because the airfl ow varies by fouling of fi lters.
41
Air
direction