COMMISSIONING
25.
PREPARATION FOR
25.1.
COMMISSIONING
ATTENTION
Before carrying out the controls
indicated below
, make sure that the
unit is disconnected from the power
mains by acting on the relevant
instruments
Electrical controls on the unit
25.1.1.
without voltage
-
Check that all the electrical
connections have been made
correctly and all the terminals
adequately tightened.
COMMISSIONING
25.2.
Restore the domestic mains power
−
supply.
Apply voltage to the unit by placing
−
the master switch at the ON
position.
ATTENTION:
ON COMMISSIONING A SEQUENCE
OF SCREENS WILL APPEAR THAT
ARE DEDICATED TO THE SETTINGS
OF THE PLANT TO WHICH THE UNIT
IS CONNECTED;
THIS DISPLAY IS THE EXCLUSIVE
COMPETENCE OF THE TECHNICAL
STAFF AUTHORISED FOR
INSTALLATION AND THAT MUST SET
THE FUNCTIONING PARAMETERS
NECESSARY TO THE UNIT FOR
CORRECT FUNCTIONING.
ONCE THE GUIDED SEQUENCE HAS
BEEN COMPLETED IT CAN NO LONG-
ER BE VIEWED.
Check the set functioning
−
parameters (set-point)
Electric controls of the live
25.2.1.
unit
Use a tester to verify that the value
−
of the power supply voltage is
equal to 230V/400V ±10%. IN
AGREEMENT WITH UNIT POWER
SUPPLY
Check that the connections made by
−
the installer are in compliance with
wiring diagrams on the machine.
Hydraulic circuit
25.2.2.
Check that the plant has been
−
washed and this water has been
drained before the unit was
connected to the plant
Check that all the hydraulic
−
connections have been made
correctly,
Check that the hydraulic system is
−
filled and under pressure and also
make sure that no air is present;
bleed if necessary.
Verify that any shut-off valves
−
present in the system are correctly
opened
Cooling circuit controls
25.2.3.
−
Check for any leaks of refrigerant
gas, particularly in correspondence
with the manometer pressure points,
pressure transducers, and pressure
switches (vibrations during transport
may have loosened the fittings).
Once the heat pump has been started
check:
−
THE HIGH PRESSURE PRESSURE
SWITCH stops the compressor,
generating the relative alarm,
when the flow pressure exceeds
the calibration value. Its correct
functioning can be checked by
closing the condenser water and
checking that the intervention
takes place in correspondence with
the calibration value read by the
high pressure transducer.
ATTENTION
If there is no intervention at the
calibration value, stop the compressor
immediately and check the causes.
ALARM reset is manual by control and
can only take place when the pressure
drops below the differential value.
ATTENTION
THE HIGH PRESSURE PRESSURE
SWITCH CAN ALSO BE MANUALLY
RE-ARMED THEREFORE PROCEED AS
FOLLOWS IN THE PHOTO
−
THE LOW PRESSURE TRANSDUCER
Sends the signal to the control to
stop the compressor, when the
intake pressure falls below the set
value.
ATTENTION
If there is no intervention at the cali-
bration value, stop the compressor
immediately and check the causes.
ALARM reset is manual by control and
can only take place when the pressure
rises above the differential value.
Over-heating
25.2.4.
Can be read on the display
Subcooling
25.2.5.
Can be read on the display
Pressing line temperature
25.2.6.
If the subcooling and overheating
values are regular, the temperature
measured in the pressing line pipe
at the compressor outlet must be
30/40°C above the condensation
temperature.
DRAINING THE PLANT
25.3.
It is recommended only to empty the
plant when maintenance that requires
draining must be performed.
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