2
9
WARNING
4.
Operation
1)
INITIAL START-UP:
With electrical power off, verify that the fan propeller
turns freely and that all fasteners are secure. Turn on electrical power and
confirm
that the fan operates smoothly.
2)
ADJUSTMENTS
: Set the fan control to the temperature shown on your
Munters
ventilation system drawing, or to a value which will provide the
desired environmental conditions.
WARNING
!
Moving parts, disconnect power
before servicing.
Operation
5
.
!
Some models of our fans allow to adjust the number of revolutions through inverter ( also
called VFD). In case of adjustment made by VFD the installer has to pay particular attention
to the following aspects:
•
it is necessary that the resistance of the ground line to which the equipment are
connected has a very low values (about 15-20 ohm) in order to avoid high currents
that can flow through the motor bearings and damage them.
•
It is necessary to install the proper line filters, to avoid interference and allow proper
operation of the equipment.
•
T
he minimum frequency of operation of the engines in the case of absence of a
forced
external ventilation is 30 Hz. In the case of an operating frequency below 30
Hz is
necessary to provide an external forced ventilation to the engine.
It is absolutely normal for the damper door not to open completely. The air flow is calculated in the
configuration with the two doors not completely open but with an angle of 20° between them.
- 15°C / + 40 °C
Ambient temperature during operation
Ambient humidity during operation
< 90%