3 | COMMISSIONING AND MAINTENANCE
21
Refrigerant label
In base alla Normativa CE n. 517/2014 su determinati gas florurati ad
effetto serra, è obbligatorio indicare la quantità totale di refrigerante
presente sistema installato. Tale informazione è presente nella targhetta
tecnica presente nell'unità esterna.
A
Standard charge
B
Additional charge
C
Total charge
D
Equivalent total weight of CO2
To write the tag:
- note the quantity onto the label with indelible ink
- place the refrigerant gas label on the outdoor unit
This unit contains fluorinated greenhouse gases covered by the
Kyoto protocol. Maintenance and disposal activities must be carried
out exclusively by skilled personnel.
Global warming potential of the R32 refrigerant gas: GWP=675
If necessary, the refrigerant must be recovered and not dispersed
into the environment.
It is forbidden to disperse the refrigerant into the environment.
3.3
Ordinary maintenance
Routine maintenance is fundamental for keeping the equipment efficient,
safe and reliable. It can be performed periodically by the Technical
Support Service, whose staff is technically qualified and can use genuine
spare parts, if necessary.
For units installed in a seaside environment, the maintenance
intervals shall be halved.
Original conditions must be restored after performing the required
maintenance operations.
All described operations MUST be carried out under the following
conditions:
- cold device
- device NOT supplied with electric power
- suitable personal protection equipment
Do not open the access covers and carry out technical or cleaning
activities before disconnecting the unit from the power grid by
positioning the system's main switch in the "OFF" position.
- position the system's main switch in the "OFF" position.
Wait 10 minutes before touching the device electric components.
Check with a tester that the voltage between the power supply
connectors of the main electronic board is lower than 10 Vdc.
Yearly operations
The annual maintenance plan includes the following checks:
- power supply voltage
- electric connection tightening
- status of cooling and hydraulic joint
- finned coil cleaning
- electric absorption
- fan grille cleaning
Cleaning the heat exchanger fins
The thermal exchange bank must be cleaned with compressed air.
Cleaning must be carried out at least once a year, according to the
location of the unit, as dirt accumulating between the fins narrows the
passage section and reduces the exchange capability.
- check the alignment of the bank's aluminium fins and, if
necessary, straighten them with the appropriate comb
- check that the condensate discharge pipe is clean
Do not use any means to accelerate the defrosting.
Do not use systems different from the ones indicated in this manual.
Emptying of the evaporator
This operation may be necessary to perform reparations on the low
pressure side (evaporator), the device reallocation or the replacement of
the indoor unit without losing the whole refrigerant charge.
Proceed as follows:
- remove the covering plug from the shut-off valve
- check that the three-way shut-off valve is fully open
- let the device operate in cooling mode for 10 - 15 minutes
- stop the device for about 3 minutes
- connect the charging tube of the pressure gauge unit to the
three-way valve service connection on gas side
- vent the air from the charging tube
- close the two-way shut-off valve on liquid side
- operate the equipment in cooling mode until pressure gauge
reads a suction pressure of approx. -1 MPa
- close the three-way shut-off valve on gas side
- stop the unit
- disconnect the pressure gauge unit
- refit the valve covering plug
Carefully check for absence of leakages from the closing point of the
plug.
3.4
Segnalazione di funzionamento e allarmi
Signals are displayed by means of LEDs on the unit main electronic
board.
Proceed as follows to access the filters:
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