Wilo TOP-Z Instrucciones De Instalación Y Funcionamiento página 39

Motor protection tripping units
If Wilo tripping units SK602(N)/SK622(N) are present in existing systems, pumps
with full motor protection (WSK) can be connected to them. Connect the mains
supply and tripping unit (observe the rating plate information) as per the wiring
diagrams (Fig. 7a and Fig. 7b) Fig. 7a:
1~ 230 V: 295 W ≤ P
7.2.2 Frequency converter operation
The three-phase motors of series TOP-Z can be connected to a frequency con-
verter. When operating with frequency converters, output filters should be used
to reduce noise and to avoid damage due to overvoltages.
For noise reduction, it is recommended that sine filters (LC filters) are used
rather than du/dt filters (RC filters).
The following limit values should be complied with:
• Rate of voltage rise du/dt <500 V/µs
• Overvoltages û < 650 V
The following limit values at the connection terminals of the pump must not be
exceeded:
• U = 150 V
min
• f = 30 Hz
min
At low output frequencies from the frequency converter, the direction of rota-
tion signal lamp at the pump may go out.
8 Commissioning
WARNING! Risk of personal injury and material damage!
Commissioning the pump without the screw plug, including the flat gasket,
is not allowed, since escaping fluid can cause damage!
Prior to commissioning the pump, check that it has been installed and con-
nected correctly.
8.1 Priming and venting
Prime and vent the unit correctly. The pump rotor chamber is vented automat-
ically after a short operating period. Dry running for short periods will not harm
the pump.
WARNING! Risk of personal injury and material damage!
The motor head, the differential pressure screw (Fig. 3, item 3) or the flange
connection/threaded pipe union are not allowed to be undone for the pur-
pose of venting!
• There is a risk of scalding!
Escaping fluid can lead to injuries to persons and material damage.
When the venting screw is opened, hot fluid may escape or shoot out at high
pressure in liquid or vapour form.
Installation and operating instructions Wilo-TOP-Z
max ≤ 345 W, with thermal winding contact
1
English
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