AERMEC ANL 090 User Manual

36
COMMISSIONING  WARNINGS
COMMISSIONING  WARNINGS
Please note that, on request by the Aermec customer or the legitimate
owner of the machine, the units in this series can be started up by the
AERMEC After-Sales Service in your area (valid only on ITALIAN territory).
The start of operation must be scheduled in advance based on the time
frame for the completion of works for the system. Prior to the intervention,
all other works (electrical and hydraulic hook-ups, priming and bleeding of
air from the system) must have been completed.
STARTUP
OPERATIONS TO BE PERFORMED WITH NO VOLTAGE PRESENT
ATTENTION
the unit is not working:
Check:
- All safety conditions have been respected
- The unit is correctly xed to the support surface
- The minimum technical spaces have been respected
- That the main power supply cables have appropriate cross-section,
which can support the total consumption of the unit. (see electric data
sections) and that the unit has been duly connected to the ground.
- That all the electrical connections have been made correctly and all
the terminals adequately tightened.
OPERATIONS TO BE PERFORMED WITH THE UNIT LIVE
ATTENTION
the unit is still not working:
- Supply power to the unit by turning the master switch to the ON
position.
- Use a tester to verify that the value of the power supply voltage to the
phases is equal to 400V ± 10%; also verify that the unbalance between
phases is no greater than 3%.
- Check that the connections made by the installer are in compliance
with the documentation.
- Verify that the resistor of the compressor sump is working by
measuring the increase in temperature of the oil pan. The resistance/s
must function for at least 12 hours before start-up of the compressor
and in any event, the temperature of the oil pan must be 10-15°C
higher than room temperature.
HYDRAULIC CIRCUIT CONTROLS
- Check that all hydraulic connections are made correctly, that the plate
indications are complied with and that a mechanical lter has been
installed in each inlet heat exchanger. (Mandatory component for
warranty to be valid).
- Make sure that the circulation pump/s is operating and that the water
ow rate is sucient to close the contact of the ow switch, if installed.
- Check the water ow rate, measuring the pressure dierence between
inlet and outlet of the evaporator and calculate the ow rate using the
evaporator pressure drop tables present in this manual.
- Check the correct functioning of the ow meters if installed. Closing
the cut-o valve at the output of the heat exchanger; the unit control
panel must show the block. Finally re-open the valve and rearm the
block
COMMISSIONING
- Once all the aforementioned checks have been carried out, the unit
can be commissioned
- Close the door of the electrical panel.
- Set the unit main switch to ON, the unit will start after a few minutes
OPERATIONS TO BE PERFORMED WITH MACHINE ON
ATTENTION
the unit is working:
Check:
- That the compressor input current is lower than the maximum
indicated in the electrical data table.
- Before starting the unit, check that the compressor rotates in the
correct direction through a three-phase protection. The spiral
compressors compress in one direction of rotation only. Therefore, it
is essential for the phase of the three-phase spiral compressors to be
correctly connected (the correct direction of rotation can be controlled
when the pressure on the intake side decreases and that on the ow
side increases with the compressor in operation). If the connection is
incorrect, the direction of rotation is reversed: this causes a loud noise
and the reduction of current consumption. In this case, the protection
system inside the compressor activated turning o the unit. To solve
the problem, disconnect and swap the wires between two of the
phases, then connect the three-phases again.
- That the voltage value lies within the pre-xed limits and that
unbalance between the three phases (three-phase power supply) is
not above 3%.
- If having to take measurements and perform checks that require the
machine to run, you must:
- make sure that any remote control systems are disconnected; however,
keep in mind that the PLC on the machine controls its functions and
can enable and disable the components creating hazardous situations
(e.g. power and rotate the fans and their mechanical drive systems).
- Operate with the electrical board open the shortest time possible
- Close the electrical board as soon as the single measurement or
control is performed
ATTENTION
The anti-freeze set temperature can only be varied by an authorised
after-sales centre and only after having checked that there is a suitable
% of anti-freeze solution in the water circuit.
Whenever this alarm intervenes, call the nearest authorised after-sales
service immediately
 Control of the water ow rate alarm, the unit provides for the
management of a ow rate alarm controlled by a dierential pressure
switch or ow switch if provided. This type of safety device intervenes
after the rst 30 seconds of pump functioning, if the water ow rate is
not sucient. The intervention stops the compressor and the pump
itself.

AERMEC ANL 090 Specifications

General

Brand	AERMEC
Model	ANL 090
Category	Chiller
Language	English