Precautions; Maintenance And Cleaning; Modifications And Spare Parts; Removal And Replacement Of The Supply Cable - DAB JET 75 Instructions Pour L'installation Et La Maintenance

10.

PRECAUTIONS

10.1 The pump should not be started more than 20 times in one hour so as not to subject the motor to
excessive thermal shock.
10.2
DANGER OF FROST: When the pump remains inactive for a long time at temperatures of less
than 32°F, the pump body must be completely emptied through the drain cap Fig. H, to prevent
possible cracking of the hydraulic components. This operation is advisable even in the event of
prolonged inactivity at normal temperature.
10.3 When starting after long periods of inactivity, the starting-up operations listed above must be
repeated.
11.

MAINTENANCE AND CLEANING

12.

MODIFICATIONS AND SPARE PARTS

12.1

Removal and replacement of the supply cable

Unscrew the screw from the cover of the pressure switch using a screwdriver and remove the cover. Remove
the yellow-green lead, slackening the earth screw, the blue lead and the brown lead from the respective
terminals at the side, slackening the screws on the terminals.
slackening the respective screws, and slip off the cable which is now disconnected.
When replacing the power cable, a cable of the same type must be used and with the same terminals,
proceeding as for disassembly in inverse order.
ATTENTION:
For power cables with a plug, fit a device for disconnecting the power network (e.g. a magnetothermal
switch) with separation contacts of at least 0,12". for each pole.
13.

INSTRUCTIONS FOR ADJUSTING THE PRESSURE SWITCH

1. Establish the minimun desired pressure value (leaving the pump).
2. Set the storage tank preloading pressure 2,9 psi less than the minimun pressure level.
3. Calibrate it following the indications given below inside the pressure box.
14.

TROUBLESHOOTING

FAULT
1. The motor does not
start and makes no
noise.
2. The motor does not
start but makes
noise.
In normal operation, the pump does not require any specific maintenance. However, it
may be necessary to clean the hydraulic parts when a decrease in performance is
observed. The pump 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.
Any modification not authorized beforehand relieves the manufacturer of all
responsibility. All the spare parts used in repairs must be original ones and the
accessories must be approved by the manufacturer so as to be able to guarantee
maximum safety of the machines and systems in which they may be fitted.
Before starting, ensure that the pump is not connected to the power network
CHECKS (possible cause)
A. Check the electric connections.
B. Check that the motor is live.
C. Check the protection fuses.
D. Check that the pressure switch is live.
E. Ensure that the tank preloading pressure is
not higher than the minimun value of the
pressure switch.
A. Ensure that the mains voltage is the same as
the value on the plate.
B. Ensure that the connections have been made
correctly.
C. Check that all the phases are present on the
terminal board. (3~)
D. Look for possible blockages in the pump or
motor.
E. Check the condition of the capacitor.
ENGLISH
Remove the cable blocking terminal,
C. If they are burnt-out, change them.
N.B. If the fault is repeated immediately this
means that the motor is short circuiting.
E. Set the preloading pressure 2,9 bar below
the minimun value of the pressure switch.
B. Correct any errors.
C. If not, restore the missing phase.
D. Remove the blockage.
E. Replace the capacitor.
5
REMEDY