Checking Calibration Of The Pump Control Pressure Switches - DAB PUMPS 1-2-3 K 55/200 T Manual Del Usuario

5.3.
Perform the following operation without switching on the power to the panel.
Fit the aquaboxes on the special sleeves of the delivery manifold.
It is possible to increase the storage capacity by connecting other tanks to "T" couplings, fitted beforehand between the
aquabox connecting sleeve and the aquabox.
5.4. Open the electric panel and check that the thermal relays that the protect the pumps are calibrated according to the
following indications:
Direct start:
Star-delta start:
5.5. Insert in all the key selectors on the electric panel the respective keys to be found inside it; then close the electric panel and
check that all the selectors on the panel are turned to position "0".
5.6. Switch on the power to the panel by turning the main motive power switch and the main switch of the auxiliary circuit
(where present) to position "1". When the green warning light comes on it indicates that the panel is live.
5.7.
Check that the pumps are turning in the correct direction.
Start each pump for a few moments, turning the respective AUT-0-MAN control selector to MAN, and check, looking from
the fan side, whether the motor is turning in a clockwise direction. (fig. 7)
If it is turning in the wrong direction, invert on the panel terminal board any two leads of the power cable.
Put the system under pressure as follows: turn all the AUT-0-MAN control selectors of each pump to AUT. The pumps will
5.8.
operated until the highest of the calibration pressures of the control pressure switches is reached in the system.
5.9.

CHECKING CALIBRATION OF THE PUMP CONTROL PRESSURE SWITCHES:

Proceed as follows:
a) Switch off the electric power supply, turning the main switch to "0" and open the panel.
b) In sets with two (or three) pumps, remove the automatic inverter SE2 (or SE3) and connect together the input and
output connectors XC1 and XC2 of the inverting device.
c) If present, regulate the timers TP1 TP2 TP3 for forced running of each pump at 0 sec. electric
d) Close the electric panel and switch the power on again, turning the main switch to "1".
e) Turn the AUT-0-MAN selector of the compensating pump, if present, to 0.
f) Turn the AUT-0-MAN selector of pump No.1 to AUT and, in sets with two or three pumps, turn the selectors of pumps
No.2 and No.3 to 0.
g) Partly turn on the flow at delivery (*) and wait for pressure switch No. 1 to give the command to start pump No. 1. On
the pressure gauge, check that that the pump starting pressure is as required.
h) Turn off the flow, checking that the pump stops at the required pressure (**).
i) In sets with two (or three) pumps, turn the AUT-0-MAN selector of pump No. 2 to AUT and the selector of pump No.
1 (and No. 3) to 0.
l) Partly turn on the flow at delivery (*) and wait for pressure switch No. 2 to give the command to start pump No. 2. On
the pressure gauge, check that that the pump starting pressure is as required.
m) Turn off the flow, checking that the pump stops at the required pressure (**).
n) In sets with three pumps turn the AUT-0-MAN selector of pump No. 3 to AUT and the selectors of pumps No. 1 and
No. 2 to 0.
o) Partly turn on the flow at delivery (*) and wait for pressure switch No. 3 to give the command to start pump No. 3. On
the pressure gauge, check that that the pump starting pressure is as required.
p) Turn off the flow, checking that the pump stops at the required pressure (**).
q) If you want to check the starting and stopping pressure of the compensating pump, if fitted, turn the AUT-0-MAN
selector of the compensating pump to AUT and the selectors of the main pumps No. 1 (No. 2 and No. 3 for sets with
two and three pumps) to 0.
r) Partly turn on the flow at delivery (*) and wait for the respective control pressure switch to start the compensating
pump. On the pressure gauge, check that that the pump starting pressure is as required.
s) Turn off the flow, checking that the pump stops at the required pressure (**).
t) Switch off the electric power supply, turning the main switch to "0", open the electric panel
and:
1) In sets with two (or three) pumps open the connection between XC1 and XC2,
reconnecting them to the automatic inverter SE2 (or SE3).
2) Return all the timers TP1 TP2 TP3 for forced running of each pump, previously zeroed,
to the desired calibration.
3) Close the electric panel and switch the power on again, turning the main switch to "1".
maximum current absorbed by the pump increased by 5-10%
maximum current absorbed by the pump, divided by the coefficient 1.73 and increased by 5-10%.
ENGLISH
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