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/0915/WLA Compact
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7.4.
Commissioning preliminary operations
The operations to be performed before commissioning must be carried out by the installers according to their field of
expertise. The commissioning preliminary operations must be performed maximum two days before commissioning.
Check correct installation
Make sure that the unit has been installed as described in chapter “7. Installation”.
•
Make sure that the hydraulic connections are correct and comply with the indications of the circuit inlet and
outlet positioned near the chiller connectors.
•
Make sure that the refrigerant does not leak.
•
With the main disconnection switch open (position 0), access the electrical panel by opening the covering
panels.
•
Make sure that the power supply and earthing cables are connected firmly to the respective terminals.
•
Make sure that the power supply voltage falls within the values allowed for the unit and stated in paragraph 5.1.
•
Close the protection panels of the electrical panel and take the main disconnection switch of the unit to I.
Low temperature operation
As indicated in paragraph 5.1, for chiller water supply temperatures lower than 10°C and external air temperatures
lower than 2.5°C, it is necessary to add an antifreeze liquid (ethylene glycol) to the water to be cooled.
The percentage of antifreeze liquid must be established according to the project values for the unit outlet water
minimum temperature and for the external air minimum temperature, in compliance with the provisions supplied by
the manufacturer of the antifreeze liquid.
In any case, the water supply and external temperature and minimum values must be complied with,
as well as the maximum percentage of glycol. These values are stated in paragraph 5.1.
The corrective coefficients of the technical data according to the percentage of glycol used are indicated in page 31.
