THREE PHASE MOTORS
Three phase motors do not have overload protection included in the standard configuration and must be
supplied by the end user. They are also available from the factory as a pre-installed option. If these protective
circuits are not ordered from the factory, use equipment as specified by the National Electric Code or other
applicable authority.
On the three phase models, the motor can operate in either direction. However,
airflow, the blower motor should be turning in a
Centrifugal
direction when viewed
from the top of the unit. To verify the correct rotation, open the blower access
panel and bump start motor (turn on briefly then turn off). Look at the top of motor,
using an inspection mirror if necessary, and make sure the motor is turning
clockwise as illustrated in Figure 4, or corresponds to the arrow on the blower
housing.
If the direction of rotation is not as specified, reverse any two wires of the
incoming power and motor will reverse direction (3 PHASE ONLY). Figure 5
for proper suction and
Figure 4.
shows details on changing the wiring configurations. The main power
leads, L1, L2, and L3 are not differentiated by color. If motor rotation
must be changed, then reversing any two of the leads will produce this
result (e.g. reverse L1 and L2 or L2 and L3). Figure 5 shows the
electrical hook-ups on the three phase motor.
Figure 5.
CAUTION
OTHER OPTIONS - ELECTRICAL
The standard Light Kit will require an additional 4.0 A at 115V AC minimum, be sure to add this into the
power requirements when allocating circuits for the MULTI-FLEX unit.
The standard light will come on only
when the unit is operating
as the unit ON/OFF switch also controls the light circuit. Optional remote switching
of motor and light is available.
MAINTENANCE
1.
Wash or change the main & Final filters when the suction drops below an acceptable level.
2.
Replace HEPA filters when Pressure drop exceeds 4” of SP
3.
Change the carbon when lab testing indicates or when Off-Gasing commences (strong smell even when the unit
is off)… We recommend keep spare carbon in stock! And change the carbon in a VERY well ventilated area…
Carbon is dusty and spent carbon can release high levels of adsorbed contaminants.
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ALWAYS DISCONNECT THE UNIT FROM THE POWER SOURCE BEFORE WORKING ON OR
NEAR THE MOTOR OR WIRING ASSEMBLIES. LOCK OUT DISCONNECTS TO PREVENT
UNEXPECTED APPLICATION OF POWER.
IN LARGE PLANTS, WHEN ROLLING UNIT FROM ONE BUILDING TO ANOTHER, YOU MAY BE
ON A DIFFERENT SUBSTATION TRANSFORMER. THE BLOWER MOTOR MAY RUN
BACKWARDS. CHECK ROTATION IN EACH LOCATION WHERE THE UNIT WILL BE USED TO
ENSURE THAT BLOWER MOTOR ROTATES IN PROPER DIRECTION.
