![background image](http://html1.mh-extra.com/html/daikin/fdxm35f3v1b/fdxm35f3v1b_installers-reference-manual_4700197011.webp)
6 Installation
Installer reference guide
11
FDXM25~60F3V1B(9)
Split system air conditioners
4P550955-1 – 2018.07
c
a
b
4
Reattach the removed suction cover.
c
b
a
a
Air inlet
b
Air outlet
c
Suction cover
5
Attach the air filter (accessory) by pushing down the hooks (2
hooks for 25+35 type, 3 hooks for 50+60 type).
rear suction
bottom suction
2
1
2
1
▪
Install the unit temporarily.
6
Attach the hanger bracket to the suspension bolt.
7
Fix the unit securely.
▪
Level
. Make sure the unit is level at all four corners using a level
or a water-filled vinyl tube.
b
a
a
Level
b
Vinyl tube
8
Tighten the upper nut.
NOTICE
Do NOT install the unit tilted.
Possible consequence:
If
the unit is tilted against the direction of the condensate flow
(the drain piping side is raised), the float switch might
malfunction and cause water to drip.
6.2.3
Guidelines when installing the ducting
WARNING
If the one or more rooms are connected with the unit via
duct system make sure:
▪ there are no operating ignition sources (example: open
flames, an operating gas appliance or an operating
electric heater) in case the floor area is less than A
min
specified in the General safety precautions;
▪ no auxiliary devices, which may be a potential ignition
source, are installed in the duct work (example: hot
surfaces with a temperature exceeding 700°C and
electric switching device);
▪ only auxiliary devices approved by manufacturer are
used in the duct work.
WARNING
Do NOT install operating ignition sources (example: open
flames, an operating gas appliance or an operating electric
heater) in the duct work.
The ducting is to be field supplied.
▪
Air inlet side.
Attach the duct and intake-side flange (field
supply). For connecting the flange, use 7 accessory screws.
a b
b a
e
e
d
d
c
a
Connection screw (accessory)
b
Flange (field supply)
c
Main unit
d
Insulation (field supply)
e
Aluminium tape (field supply)
▪
Filter.
Be sure to attach an air filter inside the air passage on the
intake side. Use an air filter with dust collecting efficiency ≥50%
(gravimetric method). The included filter is not used when the
intake duct is attached.
▪
Air outlet side.
Connect the duct according to the inside
dimension of the outlet-side flange.
▪
Air leaks.
Wind aluminium tape around the intake side flange and
duct connection. Make sure there are no air leaks at any other
connection.
▪
Insulation.
Insulate the duct to prevent condensation from
forming. Use glass wool or polyethylene foam 25 mm thick.
6.2.4
Guidelines when installing the drain
piping
General guidelines
▪
Drain pump.
For this "high lift type", the drainage sounds will be
reduced when the drain pump is installed in a higher location.
Recommended height is 300 mm.
▪
Pipe length.
Keep drain piping as short as possible.
▪
Pipe size.
Keep the pipe size equal to or greater than that of the
connecting pipe (vinyl pipe of 20 mm nominal diameter and
26 mm outer diameter).
▪
Slope.
Make sure the drain piping slopes down (at least 1/100) to
prevent air from being trapped in the piping. Use hanging bars as
shown.