8
IMER INTERNATIONAL S.p.A.
ROLLBETA
(cod. 1105490) to raise it approx. 50 cm above ground level, thus
permitting pouring of concrete into a wheelbarrow. Note that the
concrete mixer cannot be transported around the building site
when installed on the trestle.
The trestle is supplied disassembled in a box. Rotate the inner
part of the trestle in relation to the external part (ref. 1) until the two
openings are aligned, then insert the pin (ref. 2). Fit the support
(ref. 3) on the pin, above the trestles
Insert the wheel axes of the ROLLBETA in the two slots (ref. 5),
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To unload the concrete mixer, lift by means of the handle. When
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and prevent it from returning to the start position.
11. ELECTRICAL CONNECTION
- Check that the power supply voltage and frequency
are as stated on the electric motor data plate, with full load.
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(a thermal-magnetic circuit-breaker) and indirect contact protection
(a residual current type circuit-breaker, for example).
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current and cable length into account, in order to avoid risk of
voltage drops (ref. table 3)
Do not use extension cables looped around the drum.
The power lead must be the type suitable for frequent movement,
with abrasion-resistant sheathing (for example HO7RN-F).
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1). Tighten the ring nut to secure the current supply plug and
provide IP67 protection.
- The concrete mixer is now ready for operation.
12. STARTING UP.
Before connecting the concrete mixer to the power supply, check
that all the safety devices are in place and working properly, that
the power supply cable is in good condition and that the plugs and
sockets (of the waterproof type) are not wet.
Connect the power supply cable to the electric panel plug. Turn
on the concrete mixer using the switch located on the electric
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one switches on the machine, while the red one switches it off.
The switch has minimum voltage protection: after a power failure
or accidental power loss, push the green start button to start the
machine up again.
In case of an emergency, stop the machine by pressing the red
stop button (extended), then disconnect the plug from the power
supply socket.
THERMAL PROTECTION:
The electric motor is protected from overloads by a
thermal sensor: if overheating occurs, the motor stops. Let
the motor cool down before attempting to start it up again.
13. USE
- Do not introduce parts of body and/or tools inside the
mixer drum while it is running.
Insert materials while the drum is turning.
Before beginning to load the materials inside the drum, it is best
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the various materials to be mixed alternately, in the amounts
required for the type of mix to be obtained, so as to reduce the
mixing time to a minimum.
Keep the drum running until a smooth mix having the desired
consistency is obtained.
Unload the concrete while the drum is rotating; tilt the mouth of the
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- Keep a firm grip on the two tilting handles when
emptying the drum.
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mixing (mouth of the drum up) and a discharge position (mouth
of the drum down).
All drum movement operations are controlled by the two tipping
levers.
- Do not start the machine fully loaded.
14. MAINTENANCE
- All maintenance operations must be done by experien-
ced personnel, after having shut down the motor, discon-
nected power supply and emptied the mixing drum.
Every two working months, check the following:
- tightening of the screws securing the drum onto the gear unit;
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rims.
- Clean the ventilation slots of the electric motor to remove dirt
and rubbish,
Check on a weekly basis that the contacts of the plug and socket
connector on the electrical panel are clean, dry and free of rust.
14.1 CLEANING
After each daily work session or before long periods of inactivity,
the mixing drum must be cleaned thoroughly both inside and
outside.
- Do not start the mixer while carrying out cleaning
operations.
- If the protection guards are removed for cleaning,
always replace them correctly at the end of the cleaning
operation.
When using a hose for cleaning, do not direct the spray into the
plug-switch unit.
14.2 CLEANING INSTRUCTIONS
Clean the outside of the mixer with a brush and water. Scrape off
any cement or concrete deposits.
There should not be any deposits of cement or concrete inside the
drum. The inside of the drum can be cleaned better if, at the end
of the work session or before a prolonged period of inactivity, the
drum is rotated with a few shovel-fulls of gravel and water. This
will prevent any residue of cement or concrete from hardening.
The mixing drum must not be struck with hard objects such as
hammers or shovels, etc. A dented drum will reduce the mixing
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14.3 REPAIRS
- Do not start up the mixer while repairs are being car-
ried out.
Repairs to electrical systems must be carried out exclusively by
specialist staff.
Original IMER spare parts only must be used and must not
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- If the protection guards are removed during repair
operations, they must be correctly replaced when repairs
are completed.
Due to its particular construction features, the ROLLBETA does
not require frequent maintenance. However, it is advisable to
change the oil in the reduction gear with ISO VG 460 oil at 40°C
after 2000 hours of work.
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be treated as such.
- Always ensure that any writing or signs on the machine
are legible.
15. TROUBLESHOOTING
Fault
Cause
Remedy
Motor does not
start when switch is
turned
Defective power cable
Check power cables *
Plug not inserted in
socket correctly
Ensure correct
connection
Power cable from
plug to control panel
detached
Remake the
connection *
Loose wire inside
motor circuit board
Remake the
connection *
A wire has become
disconnected inside
the panel
Remake the
connection *
Faulty main switch
Replace switch
The overload safety
device has been
activated
Wait for a few minutes
and then try restarting
the machine
* Operation to be carried out by an electrician
