Beretta 20161618, Руководство по установке

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MAINTENANCE
67
— One to two leak checks per year performed with a certified
leak detector and a qualified person
— To reduce waste, the refrigerant and the oil must be in com-
pliance with current legislation, using methods that limit the
losses of refrigerant and the pressure drops and with the ma-
terials suitable for the products.
Detected faults and leaks must be repaired immediately.
The compressor oil that is recovered during maintenance contains
refrigerant and must be treated accordingly.
The coolant under pressure must not be drained in the open air.
If a refrigerant circuit is opened, plug all openings, if the operation
takes up to a day; for longer periods, load the circuit with nitrogen.
NOTA: Any deviation or non-compliance with the maintenance cri-
teria will void the warranty conditions of the unit and the manufac-
turer can no longer be held responsible.
4.2 Tightening torque for main electrical connections
Component Unit designation Value (N.m)
Main switch (option 70) L1 /L2 /L3/N/PE 2,00
Terminal X1 L1 /L2 /L3/N/PE 1,5 - 1,8
Terminal X3 0,6 - 0,8
Contactor (power and control) 1,50
Thermal relay 2,50
Transformer 1,70
Connections on the compressor
Screw on phases (only for 21kW) 2,50
Compressor speed variator
6 nuts M10 L1 /L2 /L3/N 1,20
2 nuts M10 or M8 PE 1,20
9 nuts M8 (with fuses and bars) 01/02/03 1,20
4.3 Tightening torque for main screws and nuts
Screw type Use Value (N.m)
Wood screw H M8 Assembly of the frame on the pallet 13,00
Nut H M8 Fixing the compressor on the base and fixing the plate exchanger and receiver 15,00
Self-tapping screw D=4,2mm Sheet metal parts, plastic grid and electrical components 4,20
Self-tapping screw D=3mm Mounting the deflector on the front panel 2,00
Self-tapping screw M6 Fan sub-assembly and assembly of the frame on the feet 7,00
Screw M8 Water pump unit on the partition panel 15,00
Gas nutD D1” e D1”1/4” Inlet and outlet group of heat pump pipes 70,00
Gas nut D1/2” Water filling system and nut assembly on the suction pipe of the water pump 20,00
Nut H M6 Fan propeller assembly on the fan motor 7,00
4.4 Air side heat exchanger
It is advisable to regularly inspect the finned coils to verify their
degree of soiling. It depends on the environment in which the unit
is installed, and will be worse in urban and industrial installations
and near deciduous trees.
For cleaning the finned coil, there are two maintenance levels:
— If the air heat exchangers are clogged, gently clean them ver-
tically with a brush.
— Work on the air heat exchangers with the fan off.
— For this type of operation, turn off the unit if, having made all
the appropriate service considerations, it is considered ap-
propriate.
— Clean the air heat exchangers to ensure optimal unit opera-
tion. This cleaning is necessary when the air heat exchang-
ers start to get dirty. The frequency of cleaning depends on
the season and the location of the unit (area exposed to the
wind, forest, dusty, etc.).
— Clean the finned coil with suitable products.
9
Never use pressurized water without a large diffuser. Do not
use high pressure cleaners for Cu / Cu and Cu / Al coils.
Concentrated or rotating water jets are strictly prohibited. Never
use liquid with a temperature higher than 45 ° C to clean the air
heat exchangers.
Proper and frequent cleaning (approximately every three months)
will avoid 2/3 of the corrosion problems.
4.5 Plates heat exchanger maintenance
Check that:
— The insulating foam is intact and firmly in place.
— the BPHE and the electric pipe heaters are in operation, and
correctly positioned securely.
— the connections on the water side are clean and do not show
signs of leaks.
4.6 Maintenance
9
Before any intervention on the unit, make sure that the circuit
is isolated and that there is no voltage. Note that it may take 5
minutes for the circuit capacitors to fully discharge after isolat-
ing the circuit. Only qualified personnel are authorized to work
on the VFD.
In case of alarm or persistent problem related to the VFD, contact