Tube Axial Upblast Fans
7
®
Additional Steps for Initial Start-Up
FASTENERS
-
Check all fasteners and set screws for
tightness. This is especially important for bearings
and propellers. Rotate the propeller by hand to assure
it turns freely and does not rub on the fan tube. Also,
lift the butterfly dampers to check if they open and
close without binding.
PROPELLER ROTATION
-
Direction of propeller
rotation should be checked by turning the unit on
momentarily. Rotation should be in the same direction
shown on the rotation
decal affixed to the
unit. To reverse
rotation on three
phase installations,
simply interchange
two of the three
electrical leads.
For single phase
installations, follow
the wiring diagram
located on the motor
nameplate.
FAN RPM
-
For belt drive units, the adjustable
motor pulley is preset at the factory to the customer
specified RPM. Fan speed can be increased or
decreased by the adjusting the pitch diameter of the
motor pulley. Multi-groove variable pitch pulleys must
be adjusted an equal number of turns open. Always
check the motor amperage reading and compare it to
the amperage rating shown on the motor nameplate
when changing fan RPM.
Unit Start-Up
WARNING
Disconnect and secure to the
OFF
position all
electrical power to the fan prior to inspection
or servicing. Failure to comply with this safety
precaution could result in serious injury or death.
DANGER
Pour écarter les risques de blessure grave ou
de mort, débrancher et verrouiller l’alimentation
électrique en position « Arrêt » avant tout contrôle
ou entretien.
Visual Inspection of Equipment
The equipment type and arrangement should be
verified as ordered at once when it arrives at the
jobsite. When a discrepancy is found, the local
representative must be notified immediately so
that corrective action may be investigated. Verify
electrical conformance to specifications. Unauthorized
alterations and unauthorized backcharges will not be
recognized by manufacturer.
After the fan has been installed and all utilities have
been hooked up, the unit is ready for operation.
Check
Before starting the fan, check the following:
1. Confirm that building supply voltage matches the
voltage for which the unit is wired.
2. Check all piping and wiring penetrations made by
contractors for water tightness. All penetrations
must be made watertight to prevent water
damage to the unit and building.
3. Rotate the fan propeller manually to be sure that
it is free to operate. Remove any dirt or debris
that may have accumulated during installation.
4. Check the fan bearing setscrews for tightness.
5. Check alignment of sheaves and V-belts. See
Belt Drive Maintenance section.
6. Inspect all fasteners to ensure that none have
loosened during shipment.
7. Check flex coupling for proper alignment and
connect between motor shaft and fan shaft
(direct drive).
8. Check all guarding to ensure that it is securely
attached and not interfering with rotating parts.
9. Check all electrical connections for proper
attachment.
10. Check housing and ductwork, if accessible,
for obstructions and foreign material that may
damage the fan propeller.
Rotation
Actual direction of rotation
will vary by model
Electrical Connections
Before electrical connections are made, the supply
voltage, phase and ampere capacity must be checked
for compatibility with the fan motor. In addition, the
supply wiring must be properly fused and conform
to local and national electrical codes. If the unit is
supplied with a safety disconnect switch, ensure
proper wiring to the fan motor. Be sure the disconnect
is switched to the “OFF” position before connecting
supply wires. If no disconnect is supplied, ensure the
supply wire is not live before connection. Supply wires
are then connected to the optional safety disconnect
switch (if supplied) or motor.
