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With longer pipes the flow resistance increases and suction is impaired. Danger
of cavitation is also increased. Make sure that the suction line is not leaky,
otherwise the pump will prime insufficiently or not at all.
The transparent lid must be screwed on tightly and the suction line should be
as short as possible. This will reduce priming time, which is dependent on the
air volume in the suction line. If the suction line is very long this may take up to
12 minutes. If possible the suction line to the pump should be installed below
the liquid level. Whenever the pump is installed above the liquid level it is re-
commended to install a foot valve in the suction line. Thus the suction line can-
not drain itself when the pump has been turned off. This keeps priming times
short e.g. after having cleaned the strainer basket (143).
5.4
Electrical: All electrical connections should be performed by a qualified
expert only!
Disconnect the unit from the power supply before doing any maintenance work
or electricians work.
Please make sure that the electrical installation has a disconnecting device,
which allows disconnecting from the power supply with a minimum of 3 mm
contact gap at each pole. This pump is built according to Protection Class 1.
The ambient temperature must not exceed max. 40°C. Pumps with three-phase
motors require the installation of a correctly adjusted motor overload switch.
Observe the data on the rating plate. Non-compliance will void any warranty in
case of motor failure.
Pumps with A.C. motors are equipped with a built-in thermal cut-out or a motor
overload switch as standard.
The motors are built according to thermal class F, the ribs may achieve tempe-
ratures up to 70°C.
Caution: The use of pumps for swimming pools and the restricted area
around them is only permitted if pumps are installed in accordance with
DIN/VDE 0100 part 702. Please consult your licensed electrician!
The supply circuit has to be protected with a fault current contactor with a
nominal fault current of I
Δ
N
≤ 30 mA.
According to the standard, electrical wiring H05RN – F, H07RN – F respectively
must be used. In addition to that the permissible minimum cross section must
be adapted to the motor power and to the cable length.
6.
Initial Start-up
6.1
Loosen the ring nut (160.2) above the strainer basket (143) by turning anti-
clockwise. One can use the opening device (577) which is included in the
scope of delivery. See drawing page 24, above.
CAUTION
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