DAB JET Series Instructies Voor Installatie En Onderhoud pagina 29
Beschikbare talen
Beschikbare talen
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5.6
CHECKING CALIBRATION OF THE PUMP CONTROL PRESSURE SWITCHES (only for sets with three pumps*):
Proceed as follows:
a) Switch off the electric power supply, turning the main switch to "0" and open the panel.
b) Remove the automatic inverter SZ3 and connect the connectors XC1 and XC2 together.
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 1 to AUT and the selectors of pumps 2 and 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) Turn the AUT-0-MAN selector of pump 2 to AUT and the selectors of pumps 1 and 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) Turn the AUT-0-MAN selector of pump 3 to AUT and the selectors of pumps 1 and 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)
p)
q)
CHECKING CALIBRATION OF PUMP CONTROL PRESSURE SWITCHES (only for sets with one pump*)
Partly open the supply on delivery and wait for the pressure switch to start the pump. Check the pressure gauge to ensure that the starting
pressure is as requested.
CHECKING PRESSURE CALIBRATION FOR SETS WITH TWO PUMPS
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. To change from 0
to AUT, press the buttons P1 and P2.
(*)
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.
6. INSTRUCTIONS FOR RUNNING THE SET
6.1
6.2
- Switch off the electric power supply, turning the main switch to "0", open the electric panel, disconnect
the connectors XC1 and XC2 and reconnect them to the automatic inverter SZ3.
- Close the electric panel and switch the power on again, turning the main switch to 1 (ON).
Check that all the AUT-0-MAN selectors of the pumps have been turned back to "AUT".
Completely reopen all the interception valves that may have been choked.
Each pump in the set should not be started more than 20 times in one hour to avoid subjecting the motor to
excessive thermal stress.
If the set should remain inactive for long periods, periodically perform manual starting of the set to check its state
of efficiency.
ENGLISH
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