5
© STULZ S.p.A. – all rights reserved EN/06.2016/i01
WPA ExPlOrEr OrIGINAl INSTrUCTIONS
Subjet to change without notice
6.2 Weight on the supports .................................................................................................................54
6.3 Refrigerant circuit ..............................................................................................................................56
6.4 External water circuit ......................................................................................................................56
6.5 Outside temperature sensor ......................................................................................................58
6.6 Chilled water connection ..............................................................................................................59
6.7 Filling and bleeding air ...................................................................................................................59
6.8 Electrical connection.......................................................................................................................60
6.9 Opening the electric cabinet .....................................................................................................61
6.10 Position of the electrical connections ..............................................................................61
6.11 Pump control .....................................................................................................................................62
7.2.1 Oil preheating ...............................................................................................................................................................64
7.2.2 Commissioning of the chilled water circuit ...............................................................................................64
7.2.3 Commissioning of the refrigerant circuit ....................................................................................................65
8.2 Maintenance intervals .....................................................................................................................67
8.3 Refrigerant Circuit .............................................................................................................................68
8.3.1 Refrigerant charge ....................................................................................................................................................68
8.3.2 Quantity ............................................................................................................................................................................69
8.3.3 Tightness of refrigerant circuit ..........................................................................................................................69
8.3.4 Purity ..................................................................................................................................................................................69
8.3.5 Exchange of filter drier ...........................................................................................................................................70
8.3.6 HP switch .........................................................................................................................................................................70
8.3.7 LP switch...........................................................................................................................................................................70
8.3.8 Expansion valve ...........................................................................................................................................................71
8.3.9 Compressor ....................................................................................................................................................................71
8.5.1 Tightness ..........................................................................................................................................................................72
8.5.2 Evaporator .......................................................................................................................................................................73
8.5.3 Differential pressure switch .................................................................................................................................73
10. Dismantling and disposal .....................................................................76
11. CE declaration of Conformity ...............................................................77