EN/
0915/WLA Compact
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Filling the hydraulic circuit
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With machine powered, but in OFF mode, fill the circuit completely with the filling cap. You can use the point
indicated with RI in the chiller hydraulic diagram as filling point (see “4.6. Hydraulic diagrams” on page 26).
For the symbols, refer to “1.2. Symbols used in the manual” on page 5.
Before starting the chiller, check the complete priming of the pump. To access the pump, remove the
chiller right panel
Do not run the pump without water to prevent damage.
The requirements of the liquid to be cooled are described in paragraph 5.1
Do not contaminate the filling liquid with liquids or additives other than those indicated. Do not mix
products and/or additives of different brands.
To fill the pump correctly:
•
Bleed the air from the pump body (where provided). With the unit off, open the specific cap on the top of the
pump body and bleed the air.
•
Before starting the pump, make sure that the impeller rotates freely. If not, use a screwdriver on the slot placed
on the pump shaft on the fan side to rotate the impeller in both directions until it is released.
•
The pump must never run dry to prevent the mechanical and hydraulic seal from permanent damage.
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The pump must not run with the supply inlet closed to prevent the pumped liquid and motor from the risk of
overheating.
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To prime the pump correctly during start-up, fill the pump body, the tank intake pipe, and the supply pipe with
water. Otherwise, performance will be poor and damage may occur on the hydraulic part.
Once the circuit is filled, the antifreeze function is essential. Therefore, make sure that the circulation
pump is powered with disconnection switch in position ON. Moreover, make sure that the consent
signal from the chiller is correctly connected to the pump. Also make sure that the pump valve is open.
