DAB 2 JET SET, Instruction For Installation And Maintenance

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ENGLISH
26
Klockner Moeller pressure switch type MCS (fig.10)
Slacken the 4 screws and remove the transparent cover.
Slacken and remove the locking screw “B” positioned in one of the 12 holes in the regulating knob “A”. (fig. 10/I)
When the regulating knob “A” is turned clockwise, the pump starting and stopping pressures are increased at the same
time.
When it is turned counter-clockwise they are decreased.
When the regulating knob “A” is pressed to the bottom and turned counter-clockwise, checking that the screw “C” does
not turn, the differential between the starting and the stopping pressure of the pump is increased (the starting pressure
decreases while the stopping pressure remains fixed). (fig. 10/II)
When the regulating knob “A” is pressed and turned clockwise, the differential is decreased.
Replace and tighten the locking screw “B” in the hole in the regulating knob “A” that is most aligned with one of the
two threads under the knob.
Replace the transparent cover and tighten the 4 screws.
Once the pressure switches have been recalibrated, to check the new starting and stopping pressures of the pumps in the
booster set, perform the procedure “ Checking calibration of the pressure switches” described on page 24.
In sets with 3 pumps, it is advisable to set pressure switch No.1 with starting and stopping pressures higher than
pressure switch No.2, and pressure switch No.2 with starting and stopping pressures higher than pressure switch
No.3.
Sets with two pumps work by means of a pressure transmitter connected to the E-BOX panel.
To calibrate the pump starting and stopping pressures, see the enclosed instructions booklet for the E-BOX
electric panel.
8. MAINTENANCE
8.1. All our sets are subjected to strict testing of both the electrical and the hydraulic part.
It is unusual for malfunctions to occur, unless due to external or completely accidental causes.
8.2. Below is a table with some suggestions on regulating the set in the event of irregularities in operation.
FAULTS POSSIBLE CAUSES REMEDIES
THE SET DOES NOT PRIME. 1.
2.
3.
4.
5.
6. Suction pipe with insufficient diameter;
excessive us of couplings which cause
sudden variations in direction of the
suction pipe; siphon effect.
Suction pipe clogged.
Air infiltrations in the suction pipe of the
set.
Foot valve clogged or blocked.
Water recycling between the pumps in
the set.
Interception valves on suction of each
pump partly closed. 1.
2.
3.
4.
5.
6. Check that the suction pipe is correctly
made, as indicated in the paragraph on
"Installation".
Clean it or change it.
Testing under pressure, check the perfect
seal in the couplings, the joins and the
pipes.
Clean it or change it.
Check correct operation of the non return
valves on suction of each pipe.
Open them completely.
THE SET DOES NOT START.
1.
2.
3.
4.
5. Main motive power switch and/or main
auxiliary circuit switch off (in position
“0”).
No voltage at the auxiliaries.
Automatic inverter SZ3 faulty (only for
sets with three pumps).
Electric power supply is not reaching the
pump remote control switches.
Electric circuit interrupted. 1.
2.
3.
4.
5.
Switch them on, turning them to position
“1” and check that the green light comes
on indicating that the panel is live.
Check the transformer and the fuses.
Connect together the input and output
connectors XC1 and XC2 of the inverting
device and immediately order a new
automatic inverter.
Check correct operation of the following
controls placed in series: remote control;
minimum pressure switch; minimum level
float.
Use a tester to find the point of
interruption and repair it.
THE SET DOES NOT STOP. 1.
2.
Important water leaks in the system.
Pressure switches or pressure transmitter
faulty or clogged. 1.
2.
Check the joins, couplings and pipes.
Clean them or change them.