Dry-Run Protection; Technical Details - Wilo Drain S 50 Serie Einbau- Und Betriebanleitung

Beware of damaging threads!
Threads can be damaged by excessive screwing
and different flanges.
Therefore, please note:
Only use M16 thread bolts with a maximum
length of 12...16 mm.
The maximum torque is 15 Nm (TP 50) / 25 Nm
(TP 65).
Only use flanges confirming to DIN 2576 form B
(without sealing strip).
This requirement is fulfilled by the use of Wilo
accessories.

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.
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.
Installation and operating instructions Wilo-Drain TS 50, TS 65, TP 50, TP 65
All manuals and user guides at all-guides.com
• 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 Technical details

Unit
Activation type
Network-side fuses
Connection for WSK
Cable cross section 1~230 V 6G1
Cable cross section 3~400 V 6G1
Only slow-blow fuses or K characteristic automatic
cut-outs may be used for pre-fusing.
5.6.2 AC motor
The AC version is delivered ready to plug in. To connect
it to the electricity supply, plug it into the power
socket.
Connection according to DIN EN / IEC 61000-3-11
• The pump, with an output of 1.5 kW, is intended for
operation with an electricity supply with a system
impedance Zmax at the house service connection of
max. 0.125 (0.086) ohms with a maximum of 6 (20)
switches.
• The pump, with an output of 1.1 kW, is intended for
operation with an electricity supply with a system
impedance Zmax at the house service connection of
max. 0.142 (0.116) ohms with a maximum of 6 (20)
switches.
If the impedance and the number of switches per hour
is greater than the above values, the pump can cause
temporary voltage drops and voltage fluctuations
("flickers") due to the unfavorable electricity supply.
Certain measures may therefore be necessary before
the pump can be operated properly using this connec-
tion.
Your local power supply company or the pump's manu-
facturer can give you the information required.
5.6.3 Three-phase current motor
The three-phase version can be delivered with a CEE
plug or free cable ends:
• The version with a CEE plug is connected to the elec-
tricity supply by plugging it into the electricity socket.
TS 50... TP 50...
TS 65... TP 65...
direct direct
16 A 16 A
5 V DC, 2 mA;
max.: 30 V DC, 30 mA
4G1
6G1
English
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