Technical data

14
Installation of FDEN Ceiling Suspended Unit
Application
The unit is designed for most commercial applications, i.e.
shops, offices, gyms, meeting rooms, bars, restaurants, etc.
It should not be installed in an area contaminated by oil,
chemicals, or an area with steam or excessive humidity, or
hazardous substances, i.e. flammable gases, vapours, resins,
thinners, petroleum, acids.
Do not install adjacent to equipment generating magnetic
waves or high frequency signals, as the generated noise
may cause equipment malfunction.
Unit location
Select a suitable location within the room to allow optimum
air distribution to all parts of the conditioned space. The
rear of the unit can be installed adjacent to a wall (5mm
clearance), allowing pipework and electrical connections
to be concealed.
The unit should be located so as not to cause draft
disturbance to a person located directly in the path of the
air discharge. Please note: Unit sizes 408 and 508 have high
air volume, and are normally suited to retail sites, or large
open plan areas. Consideration must be given to the
discharge air velocity if applying the larger size units to an
office environment.
Installation space
Unit location avoiding obstructions (dim. mm)
Preparation for installation
Drill a hole for the pipework – recommended size 70-86mm
dia. Use pipe sleeve (accessory) if required. Use Template
Sheet to locate positions of suspension bolts. Bolt size M8
or M10. The refrigeration pipework can be routed right,
left, top, or rear.
NOTE: the suspension brackets can be positioned facing
inwards or outwards. Most of the bracket is concealed
if facing inwards. See drawings on page 14 for positions
of bolt fixings. Ensure suspension bolts are securely
fixed into building structure, with a
minimum resistive force of 50kg.
Fix suspension bolts (4 no. M8 or M10 – supplied by installer)
into the building construction, in the required positions.
With the hanging brackets secured to the suspension bolts,
the unit (with side panels removed) can be lifted into
position, onto the hooks of the brackets.
The fixing nuts secure the unit to the brackets. The side
panels are replaced.
Attention must be paid to the level of the unit. There must
be an incline of at least 3mm, to allow drainage of
condensate from the drain tray.
For semi-recessed
installation, a suitable size
opening must be made in
the ceiling. For a solid
ceiling, e.g. plasterboard,
it is necessary to make the
opening wide enough to
allow secure fixing. The
space can be filled after
installation is complete.
Condensate drain
The termination of the drain is a ‘push-on’ fitting, 20mm
o.d. The condensate can be connected either at the right
or left. Ensure there is adequate fall (min 1:50) of the
condensate gravity drain. Use rigid drain piping. Please
refer to CONDENSATE DRAINS INSTALLATION, page 23.
The condensate drain must be insulated, to prevent external
condensation.
Condensate pumps
A small kit pump can be fitted into the casing of the air
conditioner if required. The sump/sensor unit should be
carefully installed, ensuring it is lower than the exit
connection of the condensate tray. Where the pump includes
a ‘fail safe’ switch, the connection to stop the air conditioner
can be made through the CnT port of the indoor PCB –
terminals 1 & 6. The ‘fail safe’ switch must be voltage free.
A connection adaptor, ref: F6001 is available free, from 3D,
allowing easy connection to the CnT port. See p 21 for
instructions.
Electrical installation Please refer to page 21.
0 ~ 3 mm
0 ~ 3 mm
Model 208 258 308 408 / 508
Air throw (metres) 7.5 8.0 9.0 9.5
airflow speed at above distance = 0.5m/s
Safety Warning: Refer to safety data on back cover of this manual