DP Pumps Hydro-Unit Utility Line F, Installation & Operating Manual

Page: 36 / 96

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ü The original operating manual of the pump set is on hand.
ü
The pipe unions between the pump set and the piping have been re-tightened.
ü
Flange connections have been firmly tightened.
ü
The cooling air inlet openings and cooling air outlet openings at the motor are
unobstructed.
ü All shut-off valves are open.
ü The pre-charge pressure of the accumulator has been checked.
[
ð
Section 8.3, Page 50]
ü
The minimum flow rate has been observed. [
ð
Section 6.2.5, Page 39]
1. Set the master switch to 0; unlock all motor protection switches (if applicable).
2. Provide connection to power supply.
3. Open the vent plugs at the pump set in accordance with the supplied original operating
manual of the pump set.
4. Slowly open the inlet-side shut-off valve and prime the pressure booster system until the
fluid to be handled escapes through the vent holes.
5. Close and slightly tighten the pump vent plugs.
6. Switch on all motor protection switches.
7. If fitted, set the manual-0-automatic selector switches to “automatic”.
8. Switch on the master switch.
9. Open the discharge-side valve.
10.When all pump sets have been run once, loosen the vent plugs again to let any
remaining air escape while the pump is switched off.
11.Close the vent plug.
12.Check that the pump sets are running smoothly.
13.Close the discharge-side valve in order to verify whether the pump sets reach the
maximum shut-off head.
14.Open the discharge-side valve.
15.Set the dry running protection device.
6.1.3 Dry running protection
Pressure booster systems are fitted with a pressure transmitter as dry running protection
device.
A float switch whose volt-free contact closes the circuit in upper float position can be
connected to the control system as dry running protection. Follow the float switch
manufacturer's instructions on how to set the float switch levels.
6.1.4 Start-up
NOTE
The pressure booster system is factory-set to the data indicated on the name
plate.
ü The pressure booster system has been primed and vented. [ ð Section 6.1.2, Page 35]
1. Switch on the master switch.
ð The indicator lamp lights up, indicating the system’s readiness for operation.