74 Aermec code 6755530_03 9.2011
ANK 025-085H
5. Avoid direct contact with non-insulated copper
piping and with the compressor.
6. Iden f y the clamps for the electric connec-
on and always refer exclusively to the wiring
diagram supplied with the unit.
7. For the opera onal connec on of the unit, take
the power supply cable to the electric control
board inside the unit and connect it to the
U-N and PE clamps, respec ng (U) phase, (N)
neutral, (PE) earth in the event of single-phase
power supply (230V/50Hz),
8. U-V-W as phases N as neutral and PE as ear th
in the event of three-phase power supply
(400V/3N/50Hz).
9. Re-posi on the inspec on panels.
10. Ensure that all protec ons removed for the
electric connec on have been restored before
powering the unit electrically.
11. Posi on the system master switch (outside the
appliance) at “ON”.
25.2. AUXILIARY CONNECTIONS UNDER
THE RESPONSIBILITY OF THE USER/
INSTALLER
All clamps to which reference is made in the
following explana ons are part of the 13 POLE
removable terminal board situated inside the
electric control board and connected to the
MODUCONTROL.
25.2.1. SUMMER/WINTER REMOTE
CONTROL C/F
To prepare a remote summer/winter switch-over
device, connect the device contact to clamps 3
and 5 of the 13 POLE terminal board.
25.2.2. ON/O FF CONTROL IA
To prepare a remote ON/OFF switch-over device,
connect the device contact to clamps 4 and 5 of
the 13 POLE terminal board.
25.2.3. REMOTE ALARM AE
If it should be necessary to display the machine block in a remote point due to opera ng
anomaly, clamps 6 and 7 of the 13 POLE terminal
board can be used to connect a visual or acous c
alarm signal.
25.2.4. REMOTE PANEL TRA
To prepare a remote summer/winter switch-over
device, connect the device contact to clamps 8
and 9 of the 13 POLE terminal board.
25.2.5. CONTACT FOR THERMOSTATING DOMES
TIC HOT WATER DHW TWS
To prepare a stand-alone thermosta ng device,
connect to clamps 10 and 11 of the 13 POLE
terminal board.
25.2.6. CONTACT FOR BOILER CONTROL
To prepare a boiler control, connect to clamps 12
and 13 of the 13 POLE terminal board.
25.2.7. PR3 CONNECTION ACCESSORY
If you should have the PR3 accessory, always
connect it to the 13 POLE terminal board as
shown in the wiring diagram. Remember that
the maximum distance accepted is 150 mt.
REMEMBER THAT THE PR3 AS WELL AS BEING
CONNECTED MUST BE ENABLED (see subsequent pages).
26. CONTROL AND
COMMISSIONING
26.1. PREPARATION FOR COMMISSIONING
Please note that, on request by the Aermec customer
or the legi mate owner of the machine, the units in
this series can be started up by the Aermec A er-Sales
Service in your area (valid only on ITALIAN territory).
The start of opera on must be scheduled in advance
agreed on the basis of the me frame regarding the
realisa on of the system. Prior to the interven on,
all other works (electrical and hydraulic connec ons,
priming and bleeding of air from the system) must
have been completed.
26.2. COMMISSIONING
26.2.1. PRELIMINARY OPERATIONS TO BE PER
FORMED WITH NO VOLTAGE PRESENT
Control:
1. All safety condi ons have been respected.
2. The unit is correctly fi xed to the suppor t surface.
3. The minimum technical spaces have been
respected.
4. That the main power supply cables have ap-
propriate cross-sec on, which can support the
total absorp on of the unit. (see electric data
sec ons) and that the unit has been duly con-
nected to ear th.
5. That all the electrical connec ons have been
made correctly and all the clamps adequately
ghtened.
26.2.2. THE FOLLOWING OPERATIONS ARE TO BE
CARRIED OUT WHEN THE UNIT IS LIVE.
1. Supply power to the unit by turning the master
switch to the ON position. The display will switch
on a few seconds after voltage has been supplied; check that the operating status is on OFF.
(OFF BY KEY B on lower side of the display).
2. Use a tester to verify that the value of the power
supply voltage to the U.V.W. phases is equal
to 400V ±10%; also verify that the unbalance
between phases is no greater than 3%.
3. Check that the connections made by the installer
are in compliance with the documentation.
4. Verify that the compressor sump resistance/s is/
are operating 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
1. Check that all hydraulic connections are made
correctly, that the plate indications are complied
with and that a mechanical filter has been
installed at the evaporator inlet. (Mandatory
component for warranty to be valid).
2. Make sure that the circulation pump/s is/are operating and that the water flow rate is sufficient
to close the flow switch contact.
3. Check the water flow rate, measuring the
pressure difference between evaporator inlet
and outlet and calculate the flow rate using the
evaporator pressure drop diagram present in this
documentation.
4. Check correct operation of the flow switches,
if installed; on closing the cut-off valve at the
heat exchanger outlet, the unit must display
the block. Finally, open the valve and rearm the
block.
26.3. MACHINE COMMISSIONING
The unit can be used after all of the above-mentioned
controls have been performed.
1. Close the electric control board hatch.
2. Position the appliance master switch at ON.
3. Press the ON key for 3 sec to switch the
machine on.
By pressing the ON key , the display will show
the temperature of the water and the type
of machine operation. Check the operating
parameters set (set-point) and reset any alarms
present. The unit will begin operating after a few
minutes.
26.3.1. WITH THE MACHINE ON, CHECK
COOLING CIRCUIT
CHECK:
- That the compressor input current is lower than the
maximum indicated in the technical data table.
- That in models with three-phase power supply, the
compressor noise level is not abnormal, symptom of
inverse rotation. If this is the case, invert a phase.
- That the voltage value lies within the pre-fixed
limits and that unbalance between the three phases
(three-phase power supply) is not above 3%.
- The presence of any refrigerant GAS leaks, par-
cularly in correspondence with the manometers
pressure transducers and pressure switches pressure points. (vibra ons during transporta on could
loosen the fi ngs).
- Overheating
Comparing the temperature read using a contact
thermostat positioned on the compressor intake
with the temperature shown on the low pressure
manometer (saturation temperature corresponding
to the evaporation pressure). The difference between these two temperatures gives the overheating value. Optimal values are between 4 and 8°C.
- Pressing line temperature. If the subcooling and
overheating values are regular, the temperature
measured in the pressing line pipe at the outlet of
the compressor must be 30/40°C above the condensation temperature.