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The manufacturer declines all responsibility for any inaccuracies in this manual due to printing or typing errors.
The reserves the right to modify the products contents in this catalogue without previous notice.
CAUTION
As a result of extraordinary maintenance on the cooling circuit with component replacement, before restarting the machine, perform
the following steps:
- Pay attention to restore the refrigerant charge indicated on the name plate of the machine.
- Open all the ball valves in the refrigerant circuit.
- Correctly connect the power supply and grounding.
- Check the hydraulic connections.
- Check that the water pump is working properly.
- Clean water filters.
- Check that the finned coils are not dirty or clogged.
- Check the proper rotation of fans.
Axial fans
Visually inspect these parts to make sure that the fans are well fixed to the bearing grille and that this latter is fixed to the structure of
the unit. Check the fan bearings, and close the terminal box and cable glands. Bearings damaged and bad fixing are the source of
abnormal noise and vibrations,
• Inspection of the water heat exchangers
The exchangers must ensure the maximum heat transfer possible so keep them clean and free from dirt that may reduce efficiency;
make sure that the temperature difference between water outlet temperature and evaporation/condensation does not increase over
time, if the difference exceeds 8 -10 ° C it is necessary to proceed cleaning the water side of the exchanger, keeping in mind the
following: water circulation must be in the opposite direction than normal, the fluid velocity does not exceed 1.5 times the nominal
velocity and use just water or moderately acid products but only water for final washing.
• Inspection of the water filters
Make sure to clean the filter and remove any impurities that block the proper flow of water, contributing to increase pressure drop and
therefore energy consumption of the pumps. Refer to the section “Hydraulic Connections” too.
• Inspection of the water pumps
Check water leakages, the state of the bearings, the closing of the terminal box and integrity of the cable. Bearings damaged and bad
fixing are the source of abnormal noise and vibrations,
• Reading and adjustment of the operating parameters
This control can be done using the pressure gauges (if installed) of the refrigerant circuits and using the pressure and temperature
gauges (if installed) of the hydraulic circuits of the unit (evap heat recovery - if present)
NOTE:
FOR THE PLANT WATER FILL AND DRAIN REFER TO THE SECTION HYDRAULIC CONNECTIONS
SAFETY AND MAINTENANCE
SAFETY AND MAINTENANCE