Indoor Unit Installation; Installing The Duct - Daikin FBQ50D2VEB Installation Manual

When installing an air inlet duct, select fixing screws
NOTE
that shall stick out maximum 5 mm at the inside of the
flange to protect the air filter from damage during
maintenance of the filter.
1 Air inlet duct
2 Inside of the flange
3 Fixing screw
Mounting the air inlet panel with a canvas connection (See
figure 7a)
Mounting the air inlet panel directly (See
1 Ceiling surface
2 Ceiling opening
3 Air inlet panel (Optional accessory)
4 Indoor unit (Back side)
5 Canvas connection for air inlet panel (Optional accessory)
Model
35+50
60+71
100~140
Bottom suction (See figure
The unit can be used with bottom suction by replacing
NOTE
the interchangeable plate by the air filter holding plate.
1 Air filter holding plate with air filter(s)
2 Interchangeable plate
For other installation than standard installation, contact
NOTE
your Daikin dealer for details.
2. The fan speed for this indoor unit is preset to provide standard
external static pressure.
If higher or lower external static pressure is required, reset the
external static pressure by changing the initial setting from the
remote controller.
Refer to "External static pressure setting" on page
3. Install the suspension bolts.
(Use M10 size bolt for the suspension bolt.) Use anchors for
existing ceilings, and a sunken insert, sunken anchors or other
field supplied parts for new ceilings to reinforce the ceiling in
order to bear the weight of the unit.
Installation example
(See figure 3)
1 Anchor
2 Ceiling slab
3 Long nut or turn-buckle
4 Suspension bolt
5 Indoor unit
All the above parts are field supplied.
NOTE 
For other installation than standard installation,

contact your dealer for details.
3
1
3
figure 7b)
A (mm)
760
1060
1460
7c)
8.

Indoor unit installation

When installing optional accessories (except for the air inlet panel),
read also the installation manual of the optional accessories.
Depending on the field conditions, it may be easier to install optional
accessories before the indoor unit is installed.
2
1. Install the indoor unit temporarily.
• Attach the hanger bracket to the suspension bolt. Be sure to
fix it securely by using a nut and washer from the upper and
lower sides of the hanger bracket.
≤5 mm
1 Nut (field supply)
2 Washer for hanger bracket (supplied with the unit)
3 Tighten (double nut)
2. Check if the unit is horizontally levelled.
• Do not install the unit tilted. The indoor unit is equipped with a
built-in drain pump and float switch.
(If the unit is tilted against condensate flow, the float switch
may malfunction and cause water to drip.)
• Check if the unit is levelled at all four corners with a water
level or a water-filled vinyl tube as shown in
1 Water level
2 Vinyl tube
3. Tighten the upper nut.

Installing the duct

Connect the duct supplied in the field.
Air inlet side
- Attach the duct and intake-side flange (field supply).
- Connect the flange to the main unit with accessory screws
(7).
- Wrap the intake-side flange and duct connection area with
aluminum tape or something similar to prevent air escaping.
When attaching a duct to the intake side, be sure to attach
an air filter inside the air passage on the intake side. (Use
an air filter whose dust collecting efficiency is at least 50%
in a gravimetric technique.)
The included filter is not used when the intake duct is
attached.
Flange
(Field supply)
Connection screw (7)
(accessory)
Aluminum tape
(Field supply)
Air outlet side
- Connect the duct according to the air inside of the outlet-side
flange.
- Wrap the outlet-side flange and the duct connection area with
aluminum tape or something similar to prevent air escaping.
- Be sure to insulate the duct to prevent condensation
from forming. (Material: glass wool or polyethylene
foam, 25 mm thick)
- Use electric insulation between the duct and the wall
when using metal ducts to pass metal laths of the net or
fence shape or metal plating into wooden buildings.
- Be sure to explain about the way of maintaining and
cleaning local procurements (air filter, grille (both air
outlet and suction grille), etc.) to your customer.
(See figure 4)
Flange
Main unit
Aluminum tape
(Field supply)
Air inlet side
Air outlet side
figure 9.
Insulation
material
(Field supply)