Accessories; Assembly / Installation; Electrical Connection - Wilo -Sub TWU series Einbau- Und Betriebsanleitung

4.3. Motor
– NEMA 4", 6" and 8" flange
– watertight, sealed stator (plastic impregnated), re-windable
motor available on request.
Motor size
4"
50
Hz 6"
8"
4"
60 6"
Hz
8"
* Required flow rate of pumping medium to cool motor lagging.

4.4. Accessories

Accessories must be ordered separately.
· Switching/controlling equipment (motor protection + pump
control) · pressure switch assembly · sensor assembly · Druck-
minderer · float-/diaphragm valve · non-return valve · shut-off
valves · manometer · safety valve · dry-runn protection device ·
dipped electrodes · float switch · motor cable as assembly (incl.
plug) or piece goods (without plug) · heat-shrink cable con-
nections · steel cable (stainless steel) · diaphragm pressure
vessel · cooling-tube (stainless steel/PVC) · plug sets for cable
connection · etc.
see also catalogue/data sheet

5 Assembly / Installation

The pump can be operated either vertically or horizontally (only
with special accessory: cooling-tube). However, in the case of
horizontal installation the number of stages is limited, depen-
ding on size of pump:
– TWU 6"s-55... max. 7 stages
– All 8" pumps max. 7 stages
– All 10" pumps max. 4 stages
5.1 Assembly
– The bore-holes or pump stations must be created/arranged
in accordance with the generally applicable technical rules.
– Please ensure that the flow of water in the bore-hole or well
is sufficient for the capacity of the pump.
– The pump is carefully lowered using a double-purchase pul-
ley on the suspension rope and tripod/crane, heavy pumps
using a rope winch.
– Ensure that the pump never runs dry and make sure that even
in dry periods the water level never falls below the pump's
non-return valve (uppermost position).
In the case of installation in a deep well (well
ATTENTION!
shaft diameter greater than a bore-hole), a re-
servoir, horizontal installation or in a deep well,
a cooling-tube (accessory) must be fitted to the
unit to ensure the motor is properly cooled (fig.
2).
– It must be ensured that the well shaft in the bore-hole has a
constant internal diameter to allow the pump to be lowered
freely for the entire depth of the shaft.
– Never raise or lower the pump by the electric cable.
– Bearings lubricated with environmentally friendly products
– Rustproof materialis (or protected by antirust coating)
System of protection:
Max. number of start-ups: 20 / h
Isulations- Speed
class [min-
B 2860
2870
F 2910
B 3430
3440
F 3490
– The electrical connection and extension of the motor cable
– The final installation position must be guaranteed such that
– The rating plate must be affixed in the immediate vicinity of
– Before lowering (and whilst lowering in deep bore-holes) the
5.2
– Connections to steel threaded pipes: 2" (50-60) or 3" (80-
– It is recommended that a non-return valve be fitted on the
– A manometer, pressure switch/gauge and a shut-off valve are
5.3
– Check available mains power supply.
– Cables to be used must comply with locally applicable regu-
IP 58
Motordaten
Current type
1
]
3 ~
380 V
400 V
415 V
3 ~
440 V
460 V
(on request:
380 ~ 10 V)
must take place before the pump is lowered and be te-
sted/measured to ensure they are working.
the pump sits at least 0.30 m above the bottom of the bore-
hole or well (fig. 1).
the well head to allow access at all times to the unit's tech-
nical data.
insulation resistance of the motor and cable must be mea-
sured several times (min. 2 MΩ).
Hydraulic connections (see fig. 1)
90), 4" (102-114), 5" (127-140), 6" (152-165) depending on
size of pump.
If flexible pipework is used, the pump must be held by a
chain/steel cable. The two steel loops on the pump head are
to be used for this.
In the case of larger types, the pump is only connected di-
rectly to the pipework.
pressure side of the pump (between the ascending pipe in
the bore-hole and the above-ground pipe installation) at the
well head.
to be installed at the head of the bore-hole/well.

Electrical connection

Electrical work must be carried out by a qualified and
licensed electrician in strict compliance with local re-
gulations.
lations.
The maximum cable length depends on the nominal
motor current and the permissible drop in voltage
over the entire cable length.
ENGLISH
Cooling flow
rate
[cm/s] *
8
16
8
16
9