Dry-Run Protection - Wilo -Rexa PRO V06DA-110/EAD1X2-T0015-540-O Einbau- Und Betriebsanleitung

Alternatively, a Storz fixed coupling can be fitted to the
pipe bend and a Storz hose coupling to the discharge
hose.
4 Lay the power supply cable so that it cannot be dam-
aged.
5 Position the product in the operating area. If necessary,
secure the load-carrying equipment to the carrying
handle, lift the product and set it down at the intended
operating position (pit, shaft).
6 Check that the product is upright and standing on a
firm base. Do not let it subside.
7 Have an electrician connect the product to the power
supply and check the direction of rotation in accor-
dance with the chapter entitled "Start-up".
8 Lay the discharge hose so that it cannot be damaged.
Secure at a suitable place as necessary (e.g. drain).
Danger due to discharge hose being pulled off.
Injuries may result from the discharge hose being
pulled or knocked off uncontrollably. The dis-
charge hose must be secured appropriately.
Avoid kinks in the discharge hose.
Beware of burns
The housing parts can heat up to well above
104 °F (40 °C). There is a danger of burns. After
switching off, let the product cool down to ambi-
ent temperature.

5.5 Dry-run protection

Make sure that no air enters the hydraulic housing. The
product must therefore always be submerged in the
pumped liquid up to the top edge of the pump hous-
ing. For optimum reliability, we recommend installing a
dry-run protection system.
Correct running is ensured by float switches or elec-
trodes. The float switch or electrode is fixed in the
shaft and switches off the machine when the water
level falls below the minimum coverage level. If dry-run
protection is only put into effect with one float or elec-
trode, the unit may turn on and off constantly if filling
levels fluctuate strongly! This can result in the maxi-
mum number of motor start-ups (switching cycles)
being exceeded.
5.5.1 Corrective measures for avoiding excessive switching
cycles
Manual reset - The motor is switched off when the
water level falls below the minimum coverage level and
switched back on when a sufficient water level is
reached.
Separate reactivation point - A second switching point
(additional float or electrode) is used to obtain a suffi-
cient difference between the activation and deactiva-
tion points. This prevents constant switching. This
function can be put into effect with a level control
relay.
Installation and operating instructions Wilo-Rexa PRO...
5.6 Electrical connection
Risk of fatal injury due to electrical current!
There is a risk of fatal electric shocks caused by
improper electrical connections. Electrical con-
nections may only be carried out by a qualified
electrician who is approved by the local power
supplier, in accordance with locally applicable
regulations.
• Mains current and voltage must correspond to the
details on the type plate.
• Connect the power supply cable in accordance with the
applicable standards and regulations and according to
the wire assignment.
• Any available monitoring equipment, e.g. for the motor
temperature, must be connected and tested to ensure
that it is working properly.
• For three-phase current motors, a clockwise rotating
field must be available.
• Ground the product properly.
Products that are permanently installed must be
grounded in compliance with nationally applicable
standards. If a separate grounding conductor is avail-
able, it must be connected to the marked hole or
grounding terminal ( ) using a suitable screw, nut,
toothed washer and flat washer. The cross section of
the cable for the grounding conductor connection
must correspond to the local regulations.
• A motor protection switch must be used for three-
phase motors. We recommend using an earth leakage
circuit breaker (RCD)
• Switching devices are to be purchased as accessories.
5.6.1 Network-side fuses
The pre-fusing must be rated according to the starting
currents. You will find the starting currents on the type
plate.
Only slow-blow fuses or K characteristic automatic
cut-outs may be used for pre-fusing.
5.6.2 AC motor
Fig. 4: Connection plan
L
Mains supply
N
20
Bimetal sensor
21
The AC version has a capacitor switching device (oper-
ating capacitor) and free cable ends.
The connection to the mains is made at the switch box
terminals.
Electrical connections may only be made by a
qualified electrician!
If the unit has a plug, it is connected to the electricity
supply by plugging it into the electricity socket.
English
Seal integrity monitor for
DK
motor chamber
Cr Operating capacitor
PE Ground
39