Wilo Drain MTC 32, Installation And Operating Instructions Manual

Page: 39 / 348

Installation and operating instructions Wilo-Drain MTC 32 39
INSTALLATION English
3. Secure the product to the load-carrying equip -
ment, lift and lower it slowly on to the guide pipes
in the operating area. Hold the electric power ca-
bles slightly taut when lowering. When the prod-
uct is connected to the suspension device, make
sure that the electric power cables are secured
adequately against falling off and damage.
4. The correct operating position is reached auto-
matically and the discharge port is sealed by its
own weight.
5. For new installation: Flood the operating area and
bleed the discharge pipe.
6. Start the product in accordance with the section
entitled “Start-up”.
5.4.2. Portable wet installation
Fig. 3.: Portable installation
1
Load-carrying equip -
ment
5 Storz hose coupling
2 Pump pedestal 6 Discharge hose
3 Pipe bend 7a
Minimum water level for
S1 operation
4 Storz fixed coupling 7b
Minimum water level for
S2 and S3 operation
With this installation type, the product must
be equipped with a pedestal (available as an
optional extra). It is fitted to the intake port and
ensures the minimum floor clearance and a secure
position on a firm foundation. This installation
type makes optional positioning in the operating
area possible. For use on a soft foundation, a hard
base must be used to prevent the machine from
subsiding. A discharge hose is connected on the
discharge side.
The unit must be anchored to the floor for longer
operating times with this type of installation. This
prevents vibrations as well as guaranteeing quiet
and low-wearing running.
1. Mount the pedestal at the intake port.
2. Attach the pipe bend to the discharge port.
3. Screw the fixed Storz coupling onto the pipe
elbow and fasten it.
4. Lay the power supply cable so that it cannot be
damaged.
5. Position the product in the operating area. If nec -
essary, 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
mains power supply and check the direction
of rotation in accordance with the “Start-up”
section.
8. Lay the discharge hose so that it cannot be dam-
aged. Secure at a suitable place as necessary (e.g.
drain).
BEWARE of the discharge hose being pulled
off!
Injuries may result from the discharge hose
being pulled or knocked off accidentally. The
discharge hose must be secured appropriately.
Avoid kinks in the discharge hose.
BEWARE of burns!
The housing components can heat up to well
above 40 °C. There is a danger of burns! After
switching off, let the product cool down to
ambient temperature.
5.4.3. Level controller
Fill levels can be determined using the level con-
trol system, meaning the unit is switched on and
off automatically. The fill level can be recorded
using float switches, pressure and ultrasound
measurements or electrodes.
Note the following information:
• When using float switches, ensure that they can
move freely in the operating area.
• The water level must not fall below the minimum.
•
The maximum starts per hour may not be exceed -
ed.
• If the fill levels fluctuate strongly, then a level
control should be made on two test points as
standard. This means larger differential gaps are
reached.
Installation
For correct installation, please see the installation
and operation manual for the level control device.
Observe the information on the maximum starts
per hour and the minimum water level.
5.5. Dry-running protection
To guarantee the necessary cooling, the unit must
be submerged in the pumped fluid, depending on
the operating mode. Also 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
hydraulic housing or the motor housing. For
optimum reliability, we recommend installing a
dry-run protection system.
Correct running is ensured by float switches or
electrodes. 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 the dry-run protection only consists of
one float or electrode, the unit may turn on and
off constantly if filling levels fluctuate strongly.
This can result in the maximum 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.