DAB 1 NKV EN Instrucciones Para La Instalación Y El Mantenimiento página 31

Klockner Moeller pressure switch type MCS
Undo the 4 screws and remove the cover.
Slacken and remove the locking screw "B" positioned in one
of the 12 holes in the regulating knob "A". (figure 1)
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. (figure
2)
When the regulating knob "A" is pressed and turned counter-
clockwise, the differential between the starting and the
stopping pressure of the pump is increased (the starting
pressure decreases while the stopping pressure remains fixed).
When the regulating knob "A" is pressed and turned
clockwise, the differential is decreased. (figure 3)
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. (figure 4)
Replace the cover and tighten the 4 screws.
8. COMPENSATING ELECTROPUMP
8.1. The pump sets may be provided with a self-priming compensating pump, JET models, connected to the delivery
manifold by means of a check valve and an interception ball valve.
Instead the suction, as in any pump of a set according to standards EN 12845 – UNI 10779, is kept independent.
Keep the pressure switch that controls the compensating pump always calibrated with starting and
8.2.
stopping pressures higher than the others. This is indispensable in order to allow this pump to perform
its task of compensating small falls in pressure in the system before starting the main electropumps and
motor pump.
9. MAINTENANCE
9.1. 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.
Below is a table with some suggestions on regulating the set in the event of irregularities in operation.
9.2.
FAULTS
A PUMP IN THE SET
DOES NOT PRIME.
A PUMP IN THE SET DOES
NOT START.
ENGLISH
POSSIBLE CAUSES
1. Suction pipe with insufficient diameter;
excessive use of couplings which cause
sudden variations in direction of the suction
pipe; siphon effect.
2. Suction pipe clogged.
3. Air infiltrations in the suction pipe of the
pump.
4. Foot valve clogged or blocked.
5. Interception valve on suction partly closed.
1. Main motive power switch and/or main
auxiliary circuit switch off (in position "0").
2. Protection overload
transformer and/or of the auxiliary circuit
faulty or tripped.
3. The Diesel motor pump starting batteries are
not efficient.
4. Electric circuit interrupted.
1.
2.
3.
4.
5.
1.
switches of the 2.
3.
4.
27
REMEDIES
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.
Open it completely.
Switch them on, turning them to position
"1" and check that the two green lights
come on indicating that the panel is live.
If faulty, change them.
If tripped, reset them.
Check the efficiency of the battery chargers
in the motor pump panel (check absorption
of the motor pump panel with ammeters)
If the batteries are inefficient, change them.
Use a tester to find the point of interruption
and repair it.