User Guide

English
26 WILO SE 06/2011
• The electrical connection must be established via a fixed power cable
which has a plug attachment or an all-pole switch with a contact
opening width of at least
1
/
8
” (3 mm). Use 140/167 °F (60/75 °C) cop-
per conductors only. The power cable is to be fed through the
NPT
3
/
4
“ threaded cable connection (Fig. 25, Item 1).
Cross-section of power cable to be maintained:
min. AWG16 (4 x 1.5 mm
2
)
max. AWG12 (4 x 4.0 mm
2
)
NOTE:
For the right screw tightening torque of the terminals see “Tab. 2
Screw tightening torques” on page 55. Be sure to use a calibrated
torque wrench.
• In order to comply with electromagnetic compatibility standards, the
following cables must always be shielded:
• DDG (if installed on-site)
•IN2 (setpoint)
• DP communication (for cable lengths > 3.3 ft/1 m); (terminal “MP”)
Comply with polarity:
MA = L => SL = L
MA = H => SL = H
•Ext. Off
•AUX
• Communication cable IF-Module
The shield must be applied to both sides: on the EMC cable clips in the
module and on the other end. The lines for SBM and SSM do not have
to be shielded.
• In order to ensure drip protection and strain relief on the threaded
cable connection, cables with a sufficient outer diameter must be
used and must be screwed sufficiently tightly. Also, the cables near
the threaded cable connection are to be bent to form a drainage loop,
to drain any accumulated drips. Position the threaded cable connec-
tion or lay the cables accordingly to ensure that no drips can run into
the module. Non-assigned threaded cable connections must remain
sealed with the plugs provided by the manufacturer.
• The supply cable is to be placed in such a way that under no circum-
stances can it come into contact with the pipe and/or the pump and
motor housing.
• When pumps are used in systems with water temperatures above
90°C / 194°F, a suitably heat-resistant connection line must be used.
• This pump is equipped with a frequency converter and may not be
protected by a residual-current-operated protection switch. Fre-
quency converters can impair the function of residual-current-oper-
ated protection circuits.
Exception: residual-current-operated protection switches which have
a selective type B universal-current-sensitive design are allowed.
•Labeling: RCD
• Trigger current: > 30 mA
• Check the current type and voltage of the mains connection.
• Observe the name plate information for the pump. The current type
and voltage of the mains connection must correspond to the specifi-
cations on the name plate.
• Suitable for use on a circuit capable of delivering not more than 5000
rms symmetrical Amperes, 480 V maximum when protected by CC, J
or RK5 Class Fuses, rated 20 A.
Fig. 25: NPT
3
/
4
” threaded cable connection
1