69
© STULZ S.p.A. – all rights reserved EN/06.2016/i09
WSA ExplOrEr OriginAl inStructiOnS
7. commissioning
WArning
• The unit must be installed and connected in accordance with the chapter "6 Installation" at
page 57, before initial commissioning.
• Only authorized personnel must commission the unit
7.1 preparation
WArning
• Power supply of the customer must be switched off
• Check that the unit main-switch is in OFF position
inspect for visible damages
which can affect proper operation of the chiller, and in particular:
• check for transport/handling/installation damages
• check that all components are installed in a proper way and are correctly fixed
• check if the insulations are correctly installed and without damages
• corrosions
• verify that all documents are available (manual part I°, part II° and electronic controller manual)
check the refrigerant circuit
: connect your own gauges and check the tightness of the refrig-
erant circuits according to the outside temperature of the refrigerant pressure. In case off leak-
age please contact the manufacture
check compressor oil level
see “8.3.9 Compressor” at page 71
check correct power connection cabling.
Be sure that all the connections are correctly
installed and fixed (see “6.8 Electrical connection” at page 60 ). Verify the earth connections
(see “6.10 Position of the electrical connections” at page 61 ).
check water system.
Verify the flow direction is according the IN/OUT connections on the
refrigerator (see “5.5 Dimensional drawings” at page 45 ).
• check the hydraulic connection
• check if the water system is filled up with water/glycol and the glycol concentration according
to the “6.4 External water circuit” at page 56
• ensure that all valves are open
• check if there is a water filter in the inlet of the unit, its size and cleanness.
7.2 First Startup
• Open the electrical compartment door of the unit using the key provided.
• Check whether all power switches and control-circuit fuses in the electrical section of the unit
are switched OFF.
• Re-tighten all screw connections in the electric cabinet.
• Verify the smooth function of the contactors.
