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It is advisable to repeat this operation after the unit has been operating for a few hours and
regularly check the system pressure. Top-ups must be carried out with the machine off
(pump OFF).
The system must be filled to a pressure range between 1 and 2 bar.
8.5.2 Draining of the water circuit
• Before starting to load, set the main switch of the system to "off".
• Open the rear inspection panel of the chiller.
• Verify that the drain cocks of the chiller and the system are closed.
• Open all the vent valves of the chiller, the system and the relative terminals.
• Before starting to load, set the main switch of the system to "off".
• Before starting to empty, set the main switch of the system to ''off''.
• Open the rear inspection panel of the chiller.
• Verify that the system water load/top-up valve is closed.
If the system is supplemented with antifreeze liquids, this should not be drained freely
because of pollution. It must be collected and possibly reused.
8.5.3 Exchanger cleaning
The material not trapped by the filters, the water hardness or the high concentration of low
freezing point solutions may dirty the water exchangers, reducing the efficiency of the heat
exchange.
By using a differential pressure gauge it is possible to check the pressure loss between exchanger
inlet and outlet.
If, from an inspection, it is found that the pressure values compromise regular operation or reduce
machine efficiency, cleaning the exchanger will be required.
The exchangers must be cleaned with the machine off and by personnel authorised and trained
for this type of operation.
The exchangers must be cleaned by using the specific pressure sockets and with specific
detergents. At the end of the cleaning operation the exchangers must be appropriately rinsed to
prevent detergent from circulating in the system.
At the end of the operation the water system must be reloaded and vented before restarting.
8.6 Refrigerant circuit
8.6.1 Cooling circuit repair
These operations should be carried out only by qualified personnel, using standard
techniques typical of cooling systems that use halogen fluids such as refrigerants.
8.6.2 Refrigerant top up
They should be carried out only after having identified and repaired the leaking points.
No more than two top ups are permitted. If an additional top-up is required, the cooling
circuit must be emptied completely and filled with virgin refrigerant.
8.7 Decommissioning and disposing
This product falls within the field of application of Directive 2012/19/EU on the management of
waste electric and electronic equipment (WEEE).
These types of products may contain substances that are potentially harmful to human
health and the environment and cannot be disposed of as household waste.
When the machine needs to be replaced or dismantled it must be disposed of according to local
regulations on sorted waste, otherwise you must contact your local dealer for information on free
pick-up.
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