DAB 1 S4 Installations- Und Wartungsanleitungen Seite 22

Danfoss pressure switch type KP
Slacken the 2 screws and remove the cover.
Unscrew the locking screw above the regulating screws.
Set the upper pressure limit on the START-STOP regulating scale
(marked RANGE), turning the cross-headed screw.
Then set the lower pressure limit using the differential scale (marked
DIFF), turning the hexagonal head screw.
Re-tighten the locking screw.
Replace the cover and tighten the 2 screws.
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.
6. COMPENSATING ELECTROPUMP
6.1. The pump sets may be provided with a compensating pump 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.
6.2. Keep the pressure switch that controls the compensating pump always calibrated with starting and 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 electropump.
7. 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.
9.2. Below is a table with some suggestions on regulating the set in the event of irregularities in operation.
FAULTS
A PUMP IN THE SET DOES NOT
START.
THE STOP BUTTON DOES
NOT STOP THE PUMP
ENGLISH
POSSIBLE CAUSES
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. Electric circuit interrupted.
1. Important water leaks in the system, so the
pressure is not re-established above the
opening pressure of the pressure switch
(about 1.5 bar above the closing pressure of
the pressure switch, that is the starting
pressure of the electropump) .
2. A jumper has been fitted on the terminals for
connecting the float for the priming tank (to be
installed in the event of suction above head)
Start/Stop
(RANGE)
1.
switches of the
2.
3.
1.
2.
20
Differential
REMEDIES
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.
Use a tester to find the point of interruption
and repair it.
Check the joins, couplings and pipes.
Remove the jumper in the event of suction
below head.
Insert the float for the priming tank in the
event of suction above head.
(DIFF)