MAINTENANCE AND OPERATING MANUAL
Operation and maintenance
HAS T 070÷140
93
ENGLISH
EN
The data in this manual are not binding and they can be modified by the manufacturer without notice. Reproduction of this manual is strictly prohibited.
8.2.2 Emptying of the evaporator
The emptying of the evaporator is necessary if the unit tops, if it is not equipped with antifreeze resistances and the ambient
temperature reaches water freezing point.
If it will be necessary to empty the water circuit it is possible to:
• discharge the water using the drainage cocks of the unit (see paragraph 4.3.3 “Hydraulic connections” ).
• if the unit has not these cocks it is possible to discharge the water by using the supply pipelines.
The water circuit emptying operation becomes indispensable when the unit is without antifreeze resistance and must
remain OFF for a long time in an ambient with temperatures which could reach the freezing values of water inside the
evaporator and inside the condenser (risk of breaking).
There is a cock at the rear of the evaporator to be used for draining it.
Plate evaporators: once the water has been drained from the bottom valve, use a compressed air jet inside the exchanger to
remove all water residue. Remove the lock nut from the bleed screw (A) and blow compressed air onto point (A).
Only the units equipped with the tank have a cock at the rare to be used to drain the hydraulic circuit.
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