Checking Calibration Of The Pump Control Pressure Switches - DAB 2 JET 102 M Instructions De Mise En Service Et D'entretien

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 respective magnetothermal switches that protect the pumps (only for three-
phase motors) are calibrated according to the following indications:
- Direct start: maximum current absorbed by the pump increased by 5-10%
For other data concerning the electric connection, feeding of the panel and starting of the set see the Panel
Instructions Manual – Paragraphs 9.4 / 9.5 / 9.6 / 9.7.
5.5.
Check that the pumps are turning in the correct direction (Only for three-phase motors)
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.
5.6.

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) Close the electric panel and switch the power on again, turning the main switch to "1".
d) 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.
e) 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..
f) Turn off the flow, checking that the pump stops at the required pressure (**).
g) 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.
h) 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.
i) Turn off the flow, checking that the pump stops at the required pressure (**).
l) 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.
m) 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.
n) Turn off the flow, checking that the pump stops at the required pressure (**).
o) 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) Close the electric panel and switch the power on again, turning the main switch to "1".
p)
Check that all the AUT-0-MAN selectors of the main pumps have been turned back to
"AUT".
q)
Completely reopen all the interception valves that may have been choked.
(*) When turned on only partly the pressure in the system will decrease slowly and gradually, allowing a more
precise reading of the pressure gauge at the time of closing the pressure switch.
(**) If the operating electropump puts the system back under pressure too quickly, partly turn off the interception
valve on the delivery of the pump. In this way the pressure will increase slowly and gradually, allowing a more
precise reading of the pressure gauge at the time of opening the pressure switch.
ENGLISH
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