FOUNDATION
For proper operation of your ffi fan, the unit is to be
mounted on a level pad. The fan should not be
anchored to the pad but should be allowed to “float” on
the pad. The fan pad should be at the same elevation
as the floor of the bin or building.
FAN INSTALLATION
1. See dimension illustration for the physical size of the
fan. Use the dimensions shown to determine the posi-
tion of the fan when installed.
2. Rotate the fan wheel to be sure it revolves freely and
does not contact the housing.
3. Check all fasteners on the fan to make sure they are
tight (fasteners may loosen during shipping). If any
loose fasteners are found, check for proper clearance
and retighten.
4. Check all electrical connections that may have loosened
during shipping.
5. Make certain that all joints and seams around the lower
part of the bin are well sealed to prevent air leakage
from the air space under the perforated drying floor.
The connecting air duct must be reasonably airtight.
Air leakage wastes fan efficiency.
6. The connecting air duct or “transition duct” and con-
nector should be all metal construction, with a gradual
angle to the rectangular opening through the bin wall.
7. Avoid abrupt angles or any type of connecting air duct
that would restrict airflow. The cross-sectional area of
the connecting duct should gradually increase to about
1.5 times the fan area where it enters the air chamber
through the bin wall.
8. Keep the air entrance as clear as possible from
obstruction by floor supports.
9. Adequate exhaust air openings in the roof are
required to prevent any additional back pressure (2
to 3 times fan outlet cross-sectional area).
ELECTRICAL INSTALLATION
1. The electrical installation must be performed by a certi-
fied electrician, in accordance with the appropriate
national and local electrical codes. Any violation of
electrical wiring codes could jeopardize the ffi warran-
ty.
2. ffi Corporation recommends contacting your local
power company to advise them of the additional load to
be placed on their line. Only the power company rep-
resentative can ensure that their system is sized prop-
erly to provide adequate service to your facility and
new equipment.
3. Each fan motor must be supplied with an independent
power circuit, equipped with a fused disconnect switch.
Locate this switch near the unit, as the power should be
shut off before opening the control box cover, or per-
forming any service on the unit. NOTE: The fused dis-
connect is provided by the owner and MUST BE COR-
RECTLY SIZED AND CONNECTED TO ALLOW
PROPER MOTOR OPERATION.
UNITS WITHOUT CONTROLS - It is the customer's
responsibility to provide a fused disconnect and motor
overload protection. The disconnect and overload
device must be sized and connected correctly to allow
proper motor operation. Failure to provide these com-
ponents could cause severe motor damage and void
the manufactures warranty.
4. Be sure that the disconnect and the fan are well
grounded.
5. The following wires must be supplied to each fan.
Units without control transformers require a separate
neutral and earth ground connection.
1PH 230V . . . . . . . . . . . . . . . .L1, L2, N, G
3PH 230V . . . . . . . . . . . . . . . .L1, L2, L3, N, G
3PH 230V with optional
transformer kit . . . . . . . . . .L1, L2, L3, G
3PH 460V . . . . . . . . . . . . . . .L1, L2, L3, G
6. Use electrical conductors of adequate size.
Undersized wire can lead to voltage drop and cause
motor overheating and shortened life. Therefore, it is
necessary to know the distance from the unit to avail-
able transformer and the horsepower of your fan unit.
These two factors will determine the size of wire need-
ed for efficient operation. The full load current is listed
in Tables 1 and 2. The full load current is also stamped
on the motor nameplate.
7. The starter controls require 115VAC power to operate.
On 230V 3PH units, this power is supplied by L1 to
neutral.
WARNING! The voltage between L1 and N
must be 115VAC. Any other voltage may
cause severe damage to equipment.
Check this voltage before starting unit. If voltage is not
within 105-125VAC, check for proper voltage on L2 or
L3 and move to appropriate leg. If voltage is not
acceptable, install a 0.25 KVA step-down transformer
kit (part no. TRANS-230). (Note: Grounded B and
some open delta power supplies will require this trans-
former kit.)
INSTALLATION CHECK
When the fan is completely installed, the unit will need
to be checked for proper rotation. Provide power to the
fan controls and start the fan momentarily. Make sure
that the fan wheel rotation is in the direction that the
decal on the fan housing illustrates. If the decal is
missing, note that the wheel should operate clockwise
when viewed through the inlet guard. If the wheel is
rotating the wrong direction, have your electrician cor-
rect the wiring.
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I N S T A L L A T I O N