5 Installation
Installation manual
7
FNA25~60A2VEB(9)
Split system air conditioners
4P456958-1D – 2018.11
7×
c
b
d
d
a
a
c
b
A
B
A
Removing the suction cover
B
Reattaching the suction cover
a
Suction cover
b
Protective grille
c
Air inlet
d
Air outlet
7
Remove one leg on the opposite side of the electronic
component box.
8
Reattach the removed suction cover to the bottom side.
9
Attach the protective grille to the front side.
10
Reattach the leg if necessary.
11
Attach the air filter (accessory) by pushing down the hooks (2
hooks for 25+35 type, 3 hooks for 50+60 type).
A
B
a
b
2
1
A
Front suction
B
Bottom suction
a
Main unit
b
Filter
▪
Install the unit temporarily.
12
Attach the hanger bracket to the suspension bolt.
13
Fix the unit securely.
14
Adjust the unit to fit between the walls.
▪
Level.
Make sure the unit is level at all four corners using a level
or a water-filled vinyl tube.
15
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.
▪
Fixing the unit.
Level the unit with the levelling screws
(accessory). If the floor is too uneven to level the unit, place the
unit on a flat and levelled base. If the unit is in danger of falling
over, fasten it to the wall using factory-made holes or to the floor
using floor fasteners (field supply).
2×
5.1.2
Guidelines when installing the ducting
WARNING
If one or more rooms are connected to the unit using a
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 the manufacturer
are used in the duct work;
▪ an air inlet or outlet is connected directly with a room by
ducting. Do NOT use spaces such as a false ceiling as
a duct for the air inlet or outlet.
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.
