DAB JET 151 Installationsanweisung Und Wartung Seite 12

3.4 Checking motor shaft rotation
Before installing the pump you must check that the rotating parts turn freely. For this purpose remove the fan cover from its seat in the motor end
cover. Insert a screwdriver in the notch on the motor shaft from the ventilation side. If there is a blockage, turn the screwdriver, tapping it gently
with a hammer. FIG. A
4. INSTALLATION
The pumps may contain small quantities of residual water from testing.
We advise flushing them briefly with clean water before their final installation.
4.1 The electropump must be fitted in a well ventilated place, protected from unfavourable weather conditions and with an environment
temperature not exceeding 40°C. Fig.B
4.2 A firm anchoring of the pump to the bearing surface favours the absorption of any vibrations caused by pump operation. Fig. C
4.3 Ensure that the metal pipes do not exert undue strain on the apertures, thus preventing deformations or breakages. Fig. C
4.4 The lifting and carrying handle must always be present and well fixed to the support on all pumps produced in the portable version.
4.5 Pumps that are to be used in fountains for outdoor use, in garden ponds and similar places, must be fed by means of a circuit
equipped with a differential current device, the rated operating differential current of which is not higher than 30 mA.
5. ELECTRICAL CONNECTION
Caution! always follow the safety regulations.
Scrupulously follow the wiring diagrams inside the terminal board box.
5.1 In fixed installations, International Safety Standards require the use of isolating switches with a fuse-carrier base.
5.2 Single-phase motors are provided with built-in thermal overload protection and may be connected directly to the mains. Three-phase
motors must be protected with an automatic switch (e.g. overload protection) set at the values on the electropump data plate.
5.3 In the power mains there must be a device that ensures complete disconnection in overvoltage category III conditions.
6. STARTING UP
6.1
Do not start the pump unless it has been completely filled with fluid.
Before starting up, check that the pump is properly primed; fill it completely with clean water by means of the hole provided after having
removed the filler cap on the pump body (Fig. F). Dry operation causes irreparable damage to the mechanical seal. The filling cap
must then be screwed back on carefully.
6.2 Switch on the power and check, on the three-phase version, that the motor is turning in the correct direction; this should be in a clockwise
direction, looking at the motor from the impeller side. Fig. G If it is turning in the wrong direction, invert the connections of any two wires
on the terminal board, after having disconnected the pump from the power mains.
7. PRECAUTIONS
7.1 The electropump should not be started more than 20 times in one hour so as not to subject the motor to excessive thermal shock.
7.2 When starting after long periods of inactivity, the starting-up operations listed above must be repeated.
7.3 It is always good practice to place the pump as close as possible to the liquid to be pumped (Fig.I - Pag.74)
8. MAINTENANCE AND CLEANING
The electropump must not be dismantled unless by skilled personnel in possession of the qualifications required
by the regulations in force. In any case, all repairs and maintenance jobs must be carried out only after having
disconnected the pump from the power mains.
9. MODIFICATIONS AND SPARE PARTS
Any modification not authorized beforehand relieves the manufacturer of all responsibility.
In the event of damage to the power cable of this appliance, the repair must be carried out by skilled personnel,
in order to prevent all risks.
9.1 Removal and replacement of the supply cable
Before starting, ensure that the electropump is not connected to the power network.
For versions without a pressure switch:Remove the condenser cover, unscrewing the four screws on it. Unscrew the three terminals L - N -
and disconnect the brown lead, the blue lead and the yellow-green lead, coming from the supply cable, after having slackened the grommet.
Version with a TELEMECANIQUE / SQUARE D – TELEMECANIQUE / ITALTECNICA pressure switch:
 Section of cable with plug from the pressure switch: unscrew the screw from the cover of the pressure switch using a screwdriver and
remove the cover, releasing it from the base of the pressure switch. Slip out the yellow-green lead, unscrewing the earth screw on the left
side. Still on the same side, slip the blue lead and the brown lead off their terminals, slackening the screws on the terminals. Slacken the
cable clamping nut of the pressure switch on the left side and slip off the cable which is now disconnected.
 Section of cable from the pressure switch to the terminal board: unscrew the nut on the cover of the pressure switch using a screwdriver
and remove the cover, releasing it from the base of the pressure switch. Slip out the yellow-green lead, unscrewing the earth screw on the
right side. Still on the same side, slip the blue lead and the brown lead off their terminals, slackening the screws on the terminals. Slacken
the cable clamping nut of the pressure switch on the right side and slip off the cable which is now disconnected. Remove the terminal board
ENGLISH
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