Mitsubishi Electric PLA-A12BA4 Installation Manual page 14

9. Installing the grille
14
Main unit
Corner drain pipe area
Screw with washer (for temporary use)
Grille
Screw with washer
Socket
Bell shaped hole
Fig. 9-6
Ceiling
Main unit
Grille
Make sure that there are no gaps
Adjust the nut of the main unit
using a wrench, etc.
Fig. 9-7
Clamp of the main unit
Electrical box
Indoor controler board
Catch for bell mouth
Lead wire of grille
Fig. 9-8
Button
Vane motor
Up/down vanes
Connector
Fig. 9-9
9.4.2. Temporary installation of the grille (Fig. 9-6)
• Temporarily secure the grille using the bell shaped holes by putting the socket of
the grille marked on the corner drain pipe area of the main unit.
* Make sure that the lead wiring of the grille does not get pinched between the
grille and the main unit.
9.4.3. Securing the grille (Fig. 9-7)
• Secure the grille to the main unit by tightening the previously installed two screws
(with captive washer) as well as the two remaining screws (with captive washer).
* Make sure that there are no gaps between the main unit and the grille or the
grille and the ceiling.
Fixing gaps between the grille and the ceiling
With the grille attached, adjust the height of the main unit to close the gap.
9.4.4. Wire connection (Fig. 9-8)
• Remove the 2 screws fixing the cover of electrical branch box of the unit and
open the cover.
• Be sure to connect the connector(white, 20-pole) for vane motor of the grille to
CNV connector of contoller board of the unit.
• As for PLP-42BALM, the connector of wireless sensor cable is also connected to
connecor CN90 on indoor controller board.
The lead wire of grille is passed through the catch of bell mouth of the unit perfectly.
The remaining lead wire is tied with clamp of the unit and put the cover of the unit
again with 2 screws.
Note:
Do not put the remaining lead wire in electrical branch box of the unit.
9.5. Locking the up/down airfl ow direction (Fig. 9-9)
The vanes of the unit can be set and locked in up or down orientations depending
upon the environment of use.
• Set according to the preference of the customer.
The operation of the fi xed up/down vanes and all automatic controls cannot be
performed using the wired remote controller. In addition, the actual position of the
vanes may differ from the position indicated on the wired remote controller.
Turn off the main power switch.
Injuries or an electrical shock may occur while the fan of the unit is rotating.
Disconnect the connector for the vane motor of the vent that you want to lock.
(While pressing the button, remove the connector in the direction indicated by
the arrow as shown in the diagram.) After removing the connector, insulate it
with tape.
It also can be set by wired remote controller. Refer to operation manual.
9.6. Check
• Make sure that there is no gap between the unit and the grille, or between the
grille and the surface of the ceiling. If there is any gap between the unit and the
grille, or between the grille and the surface of the ceiling, it may cause dew to
collect.
• Make sure that the wires have been securely connected.