
2
7
All wiring should be installed in accordance with
all n
ational
and l
ocal electrical
codes
. Fans used to ventilate
livestock buildings or other rooms where continuous air movement is essential should be connected to individual
electrical circuits, with a minimum of two circuits per room. For electrical connection requirements, refer to
diagram on motor nameplate and to information enclosed with the Munters environmental control to be used.
Three Phase Fans
: motor overload protection should be provided for each fan. A three-pole
s
safety switch
or slow
blow motor fuses must be used.
See Figure 25
.
If a frequency drive (inverter) is used, confirm that motors are rated for inverter duty at the voltage used. The
installation of line
filters
is recommended to reduce voltage spikes and harmonic distortion. Supplemental
motor overload protection is also recommended.
NOTE
: A safety cut-off switch should be located adjacent to each fan.
KEY:
L1=Line 1
L2=Line 2
L3=Line 3
G=Ground
Three Phase
Power Supply for
Fan
L1
L2
G
T1
T2
G
Three Phase
Power Out
to Fan Motor
L3
T3
Figure 25
Three Phase - Motor Overload Protection with Disconnect
Saftey cut-off
switch
Electrical Wiring
4
.