Variation Of The Fan Speed - AERMEC NRC Serie Manual Instalación

5. 1 VARIATION OF THE FAN
SPEED
To set the ventilation static pressure to the
installation needs, it is necessary to change
the fan speed as follows:
1) remove the front panel;
2) loosen the belt by adjusting the regulation
(B) with a proper tool;
3) remove the belt
A
4) loosen the lock (A) by means of a wrench
and turn the movable part of the pulley to
obtain the required diameter;
B
5) tighten the lock (A);
6) replace the belt, adjust its tension by
using the relevant regulation (B)
7) replace the panel
The units are normally shipped with pulley
set to obtain the nominal flow rate with no
static pressure, if not otherwise requested.
To perform an accurate setting check the
fan shaft speed with a proper instrument.
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