EN - 5
NLC_A COD: 1606.4037360_00
2.
SELECTION AND PLACE OF INSTALLATION
Before installing the unit, decide with the customer where it will be placed,
while paying attention to the following points:
•
the support surface must be able to withstand the weight of the unit;
•
the safety distance between the units and other equipment or
structures must be strictly respected so that the air in fans inlet and
outlet circulates freely.
•
The unit must be installed by an authorised technician in compliance
with the national laws in the country of destination, respecting the
minimum technical spaces to allow maintenance.
3.
POSITIONING
Before handling the unit, check the lifting capacity of the machines used,
respecting the instructions on the packaging.
To handle the machine on horizontal surfaces, use a fork-lift or the like in
the most appropriate way, paying attention to the distribution of the weight
of the unit.
Position the unit in the place indicated by the customer, placing, between
the base and the support, a rubber mattress (minimum 10 mm. thick) or
anti-vibration dampers (ACCESSORIES).
For more information, see the tables regarding dimensions
Fasten the unit by checking carefully that its on the same level; check that
easy access to the hydraulic and electric part is allowed.
4.
MINIMUM TECHNICAL CLEARANCES
500 mm
19,69 in
800 mm
31,50 in
800 mm
31,50 in
1000 mm
39,37 in
5.
OPERATION OF THE NLC UNIT
The chillers and the heat pumps of the NLC range are air-cooled machines
suitable for installing indoors. For this reason the air that crosses the coil
needs to be expelled from the utility room using suitable piping connected
to the machine itself.
The presence of the piping involves pressure drops that will need to be
overcome by the fan; the size of these losses depends on various factors like
the length of the pipe, the dimensions, complexity of the pipes, etc.
The units of the NLC series are equipped with radial fans with inverter
EC motor as standard, to immediately modulate the number of motor
revs, thus adapting the static pressure supplied from the fan to the
instantaneous drop of pressure in the tube.
When the machine is started for the first time, the installer should
set (from the control panel) the number of revs of the fan capable of
providing head equal to the total pressure drops of the piping.
The number of fan revs is generally less than the maximum number of revs
the fan is capable of.
The number of revs is set indirectly through a parame-
ter expressed in volts, which can vary from 0 to 10V:
Volt
MIN. FAN
SPEED
MAX. FAN
SPEED
0
10
All the units are factory set for 0 Pa ,
to change the static useful
pressure of the fans, follow the procedure set out in THE
MANUAL USE - INSTALLER MENU
B
B
A
A
Condensate discharge pipe
Electrical cables inlet
The condensate discharge
tubes are supplied with the
unit, and must be screwed to
the two fittings mounted on
the tray.
