20
!
7.1 Preliminary information
The indicated operations must be carried out by qualified
technicians and specifically trained on the product.
Upon request, the after-sales assistance centres execute start-
up.
The electric, hydraulic connections and the other work of the
system are the responsibility of the installer.
Agree the start-up date with the after-sales assistance centre
with sufficient advance
Check the unit is connected to the earth system.
Check fastening of the conductors: the vibrations caused by
handling and transport may cause loosening.
Power the unit by closing the isolation device but leave in
OFF.
Check the network frequency and voltage values, that are
within the limits:
400/3/50 +/- 10%
Check the unbalancing of the phases:
must be below 2%
.
7.2 Preliminary checks
7.3 Hydraulic circuit
7.4 Electric circuit
Before starting any check, verify that
:
the unit is perfectly installed and in compliance with that
reported in this manual
the electric power supply line of the unit is isolated at start-
up
the isolation device of the line is open, blocked and
equipped with relative signal.
7 - START-UP
Glycol in weight (%)
10
20
30
40
Freezing temperature (°C)
-3.9
-8.9
-15.6
-23.4
Safety temperature (°C)
-1
-4
-10
-19
Operation outside the limits can entail irreversible damages
.
L1
L2
L3
388V
379V
377V
388 + 379 + 377
3
=
381 (A)
MAX - A = 388
– 381 = 7
S =
7
A
x 100 =
1,83 OK
1)
2)
3)
!
Only with hot water coil - humidifier options
1. Find out if, before connecting the unit, the hydraulic
system has been washed and the washing water drained.
2. Check the hydraulic circuit has been loaded and
pressurised.
3. Check the shut-off valves on the circuit are in "OPEN"
position.
4. Check there is no air inside the circuit, eventually bleed it
through the vent valves in the high points of the system.
5. In case of using solutions to be cooled, check the
percentage is suitable for the type of use.
Example :
PRECAUTIONS DURING SET UP
The doors must only be opened when the unit is off. Turn
off the fan before working on the unit.
The retractable handles are not in any case suitable for
opening under depression, that is, when fan is in motion.
When the fan is operating the inspection door must be
closed, so as to avoid overloading the motor and activating
the thermal overload device.
CHECKS BEFORE AND DURING SET UP
ELECTRICAL PANEL (SUPPLIED BY OTHERS):
Check the calibration of the thermal overload devices.
AIR DISTRIBUTION NETWORK (SUPPLIED BY OTHERS)
Check the position of any dampers; these must be in the
position envisaged for normal operation. Otherwise there may
be pressure drops in the system that do not correspond to the
design specifications, compromising the operation of the air
handling unit.
