Electrical Connection - Wilo Star Serie Instrucciones De Instalación Y Funcionamiento

Pump must be installed with the shaft in the horizontal position in such a way that it is not
x
stressed by the pipework. (Installation positions in Fig. 2)
An arrow on the pump housing indicates the direction of water flow (Fig. 3, pos. 1).
x
In order to obtain the correct terminal box position the motor housing can be turned after
x
removing the two allen screws (Fig. 4).
Permitted terminal box positions see Fig. 2
x
CAUTION!
Do not damage the flat gasket between pump head and pump housing. Check the
correct position. If necessary use a new gasket: Ø 86 x Ø 76 x 2.0 mm EP.
Replace the pump head onto the pump housing and thighten the allen screws evenly.
x
After replacing, check that the rotor shaft still rotates freely. Remove the plug (located in the
x
middle of the nameplate), insert a flat head screwdriver into the slot end of the shaft and turn
to ensure free rotation.
Between the stator housing and pump volute, there are four drain holes to allow condensed
x
water to escape (Fig. 3, pos. 2).
CAUTION!
The motor and condensate holes must remain free.
For units which are to be insulated, only the pump volute may be insulated.

7.2 Electrical connection

WARNING!
Dangers caused by electrical energy must be excluded.
Electrical work by a qualified electrician only!
x
National Electrical Codes, local codes and regulations must be strictly followed.
x
All electrical connections must be performed after the electrical supply has been
x
switched off and secured against unauthorized switching.
For safe installation and operation a proper grounding of the pump to the power
x
supply's grounding terminals is required.
The operating voltage and frequency are marked on the nameplate.
x
The pump must be connected to the power supply by a solid cable equipped with a grounded
x
plug-connection or a main power switch.
The motor is impedance protected so motor overload protection is not required.
x
A minimum cable size of 14 AWG should be used (refer to the local codes).
x
When using the pump in systems with water temperature exceeding 194°F (90 °C), a
NOTE!
connecting cable with corresponding heat resistance must be used.
The supply cable must be laid so that it never touches the pipework and/or the pump and mo-
x
tor casing.
The connecting cable can be fed through the cable entry either above or below the terminal
x
box. The cabel entry which is not used must be closed by a blind plug.
Connect power as shown in fig. 5 and fig. 6
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Loosen the terminal box screw and remove the screw and cover.
x
The terminal box is equipped with Quick-action snap-lock terminal connection. Instructions:
x
Fig. 5 A: Push down the snap-lock lever towards the horizontal position until the resistance
becomes greater (with very little force)
Fig. 5 B: Take the cable to be connected, push down the snap-lock lever to a fully horizontal
position and insert the cable. To fix the cable end release the lever.
Fig. 5 C: Turn back the lever to its original vertical position.
Feed the appropriate size cable to the hole in the side of the terminal box.
x
Connect the leads of the cable according to the L and N cable entry respectively and the
x
ground lead to the
Replace the terminal box cover.
x
Possible damage of the pump
Possible damage of the pump!
Electrical shock hazard
cable entry.
ENGLISH
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