© Munters Corporation, February 2019
6
QM1061r1
Electrical Wiring
3.
KEY:
L1
=
Line 1
L2
=
Line 2
L3
=
Line 3
H
=
Hot
N
=
Neutral
G
=
Ground
Figure 8A
Single Phase - Motor Overload Protection with Disconnect
(SY2000 or Equivalent)
120 or 240 VAC Power
Supply for Fan
L1 (H)
L2 (N)
G
T1 (H)
T2 (N)
G
120 or 240 VAC
Power Out to Fan
L1 (H)
L2 (N)
T1 (H)
T2 (N)
Three Phase Power
Supply for Fan
L1
L2
G
T1
T2
G
Three Phase
Power Out
to Fan Motor
L1
L2
T1
T2
L3
T3
L3
Figure 8B
Three Phase - Motor Overload Protection with Disconnect
T3
Motor Starter
Safety Cut-off Switch
I
nformation in parenthesis refers to 120 VAC control.
Note:
:
All wiring should be installed in accordance with National, State, and Local 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 environmental control to be used.
Single Phase Fans
:
motor overload protection should be provided for each fan. A Circuit Breaker Switch or
slow blow motor type fuses must be used
See Figure 8A
.
See QM1400 for proper size.
Three Phase Fans:
motor overload protection should be provided for each fan. A three pole motor starter or
slow blow motor fuses must be used.
See Figure 8B
.
If a frequency drive (inverter) is used, confirm that motors are rated for inverter duty at the voltage used. The
installation of line reactors 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.
