16
7- START-UP
!
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%
.
Example :
7.2 PRELIMINARY CHECKS
7.3 COOLING CIRCUIT
7.4 HYDRAULIC CIRCUIT
7.5 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.
1. Visually check the cooling circuit: any oil stains can be
symptom of leaks (caused by, for example, transport,
handling or other).
2. Check the cooling circuit is pressurised: use the machine
pressure gauges, if present, or service pressure gauges.
3. Check all service sockets are closed with relative plugs;
their absence may determine coolant leaks
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)
7.6 COMPRESSOR CARTER RESISTORS
Power the compressor oil heating resistors for at least 8 hours
before starting the compressor itself:
•
upon unit commissioning
•
after every prolonged stop period with unit not
powered
Power the resistors by closing the unit isolator.
Check electric absorption of the resistors to be sure they are
working.
Execute start only if the temperature of the compressor casing
on the lower side is at least 10°C higher than the outdoor
temperature.
Do not start the compressor with carter oil not in temperature.
!
!
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.
