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13. REPAIR - REPLACEMENT COMPONENTS
For the intervention on the components listed
below and / or a replacement is required for their
replacement technical competence, for which it is
recommended to always contact a Technical
Assistance Center authorized. For safety and
quality purposes it is recommended to use for
replacements original components and spare
parts.
Always operate in conditions of maximum safety,
in compliance with the relevant regulations in
force. Before of any intervention on the appliance,
remove the power supply by acting on the switch
general. For any emptying operations
charged with refrigerant gas, use is
recommended of specific equipment for the
recovery of refrigerant, for the purpose of
environmental protection.
13.1 REFRIGERANT CIRCUIT
For whatever reason it was necessary
repair of the refrigerant circuit, with consequent
contamination, as in the case of burning of the
electric windings of the compressor or failure of
the
circuit with complete emptying, it is always
necessary
do the following:
- circuit cleaning;
- drying and high vacuum;
- test of tightness and restoration of the charge.
13.2 DRYING AND VACUUM OF THE PLANT
Drying and high vacuum are necessary for
evacuate air, moisture, and any gases that could
be in solution with the compressor oil.
If there is liquid water in the system,
it is necessary to slightly heat the parts in which
one is filed, in order to favour the evaporation.
The capacity of the high vacuum pump must be
adequate to the system in which one must
operate; is recommends using a pump with a flow
rate of at least 90 liters / minute.
The degree of vacuum must be verified with a
special one vacuum gauge for medium vacuum, if
possible electronic, with micron resolution of the
scale.
- Carrying out a heavy vacuum:
- connect the pump to the system using pipes,
swivel 1/4 SAE female connections,
at the pressure ports shown on
inlet and outlet connections in
compressor;
- connect a vacuum gauge
- make the vacuum up to the value of at least
350, 500 microns for a minimum time of
at least 30 minutes.
WARNING! Starting the appliance, in
conditions of non-compliance with the provisions
of this manual and / or the standards in force in
safety and plant engineering matter, involves
forfeiture of warranty conditions.
12.2 START-UP
Starting the appliance and selecting the mode
operation can be performed by acting
directly into the microprocessor keyboard with
the "SUN" button.
Hold for at least 2/3 seconds, at
release the LED with the sun indication will start
to flash (compressor count).
After a few minutes the LED will become solid,
and the machine will start operating, heating the
water indoor unit technique up to the temperature
of SET POINT. At this point the machine enters a
regime and will carry out all the ignition cycles e
switching off automatically and independently.
After starting the appliance, check the correct one
operation of the plant, in particular
attention to the following:
- the water pump must not
emit abnormal noise, because
this situation indicates that the air is not
been properly purged or that water flow is not
sufficient (possible obstructions, blockages or
disbursements adjustment of the devices on the
system);
- the voltage measured in the terminals of
power supply between the three phases and the
neutral must be in the 210-240 Volt range.
The same principle applies to the single-phase
versions Lower values indicate a fall of
power line voltage too high,
with consequent possible damage to the
compressor, which may also occur
even for higher voltages than those above
indicated;
- the measured temperature difference between
input and
output of the appliance must be between 3 ° C
and 8 ° C; values less than 3
° C indicate an excessive water flow,
while the flow rate will be too low with values
greater than 8 ° C;
- if the above conditions do not come
realized, turn off the machine
made corrective actions to allow
regular operation of the system.
