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Installation and operating instructions Wilo-Drain STS 65
15
7.1.2 Transportable wet well installation (Fig. 3
In the case of a portable wet well installation,
secure the pump in the pit to prevent accidents
and wandering (e.g. secure the chain with slight
pre-tension).
NOTE: When used in a sump without a firm base,
the pump must be put on a sufficiently large plate
or hung from a rope or a chain in a suitable posi-
tion.
7.1.3 Stationary dry well installation, for pump with
cooling jacket only (Fig 4)
• The fixed pipe connections on the pressure side
must be provided on site.
• The weight of pipes and fittings must not be car-
ried by the pump and compensators and must be
intercepted through the use of suitable fixings.
• A resonance-free pump installation must be
ensured on site. The pipes must be supported at
suitable intervals to prevent inadmissible vibra-
tions. The use of suitable compensators is recom-
mended for decoupling the pump.
7.2 Electrical connection
DANGER! Risk of fatal injury!
If the electrical connection is not made properly,
there is a risk of fatal injury from an electric
shock.
• Only allow the electrical connection to be made
by an electrician approved by the local electric-
ity supplier and in accordance with the local reg-
ulations in force.
• Follow the installation and operating instruc-
tions for the pump, level control device and
other accessories
.
Preparation of the electrical connection
• Make sure that the type of current and voltage of
the mains connection corresponds to the details
on the name plate.
• Protect the connection on the mains side: 16 A,
slow or automatic fuse with C characteristic.
• Earth the system according to regulations.
• Use a
30 mA residual current circuit-breaker.
• Use an isolating device with a min. 3 mm contact
opening to isolate from the mains.
• Connect the pump.
7.2.1 Pump with single-phase motor (1~230 V)
• The motor is already wired with the condenser box
at the works. The mains connection is made at
terminals L1, N, PE of the terminal box.
• According to DIN EN / IEC 61000-3-11, the pump
is designed with a power of 1.5 kW for operating
on a power supply mains with a system impedance
Zmax on the house connection of maximum 0.118
(0.086) Ohm with a maximum number of 10 (20)
connections.
• Number of connections, see 5.2 of the Technical
data.
NOTE: If the mains impedance and the number of
connections per hour is greater than the values
specified, because of the unfavourable mains
connections, the pump may lead to temporary
voltage drops and also to disturbing voltage fluc-
tuations, or flickering.
Therefore, measures may be necessary before the
pump can be operated correctly on this connec-
tion.
The necessary information must be obtained from
the electricity supply company and the manufac-
turer.
7.2.2 Pump with three-phase motor (3~400 V):
• The use of a residual current circuit-breaker is
recommended.
• The switchbox for the pump(s) is available as an
accessory.
CAUTION! Danger of property damage!
Risk of damage through incorrect electrical con-
nection.
If the switchbox is provided by the customer on
site, the following requirements of the electric-
ity supply companies must be met
.
• P
2
4 kW: direct starting:
• Set the motor protection switch to the nominal
current of the motor according to the name
plate.
• For the thermal monitoring of the motor, a
standard evaluation device can be used to con-
nect the thermal winding contact. Connect with
230 V AC, max. 1 A, recommended: 24V DC
Pos. Description of the
component
Pos. Description of the
component
4
Bend
12
Hose connection
6
Chain
13
Fixed coupling
(instead of item 12)
9
Floor supporting foot
14
Hose coupling
(instead of item 12)
11
Counter-flange
15
Pressure hose
Pos. Description of the
component
Pos. Description of the
component
2
Non-return valve
17
Installation set
3
Gate valve
18
Compensator
