o
peraTIon
G
uIdelInes
www.DaikinApplied.com 27
IM 777-8 • Skyline Air Handler
Fan Array
The Daikin Fan Array is available with optional, factory
mounted VFDs. See OM manuals OM 1190 and 1191 for
details on the Daikin supplied VFD.
Care should be taken when programing and synchronizing
the drives in the Daikin Fan Array such that all fans turn at the
same speed. Fans running at unequal speeds can produce
vibration and could stall a fan. Definition of fan numbering is
given in
Figure 43
.
The Daikin Fan Array is standard with a manual block off
plate. The unit will ship with one block off plate that will come
installed on fan 1A. This block off plate is to be removed before
unit operation and stored outside of the air tunnel. In the event
of a lost fan motor, the block off plate is installed on the non-
functional fan to prevent air re-circulation. This is designed to
be a temporary measure unit this fan and/or motor is replaced.
After fan and/or motor replacement the block off plate is to be
removed and stored outside of the air tunnel.
The Daikin Fan Array has an optional gravity actuated block off
damper. These dampers are equipped with counter weights.
The Daikin Fan Array has an optional actuated block
off damper. These dampers are designed to prevent air
recirculation in the event of a lost fan. Care should be taken
that the damper actuator only be given a close signal if the fan
is not operational (motor burnout for example).
The Daikin Fan Array can be equipped with a fan blank off plate.
See
Figure 44
with a block off plate mounted to fan 3C. If the
unit is ordered with the manual block off plate, it will be installed
to fan 1A. This plate has to be removed before start up.
WARNING
Closing the damper on an operational fan could send the fan
into surge that could produce fans stall, excessive vibration,
unit damage, or personnel injury.
Figure 43: Daikin Fan Array Configuration
Figure 44: Fan Array with Block Off Plate
6D
6C
6B
6A
Viewed from Fan Inlet End
5D
5C
5B
5A
4D
4C
4B
4A
3D
3C
3B
3A
2D
2C
2B
2A
1D
1C
1B
1A
