Commissioning & Operation; General; Wiring Check Power Cable & Sensors - VARISCO K Serie Instrucciones Para El Uso Y La Manutención

7. COMMISSIONING & OPERATION
7.1

GENERAL

After installing the control panel and pump, connect the power supply and carry out the following
procedure:
7.1.1 Check the input voltage with a Multi-Tester. Ensure it complies with the voltage of the
product (Fig. 4).
7.1.2 Check the insulation resistance with a Mega Tester to ensure it is over 10 Meg-Ohm.
(Refer to section 7.2 WIRING CHECK) (Fig. 5).
7.1.3 Ensure that all cables from the pump including sensor cables have been securely
connected to the appropriate terminals in the control box.
7.1.4 Check that the Pit or Sump is clean and free from rubbish.
7.1.5 Start the pump using the following sequence of events.
7.1.5.1 Open the gate valve.
7.1.5.2 Set the THR and Timer. (For Star-Delta starting, set the timer to 7 - 9 seconds and set
the THR to the rated current).
7.1.5.3 Turn on the main supply isolator in the control panel. Set the selector switch to manual
and jog the pump by momentarily starting it before fully starting.
7.1.5.4 Check that the direction of pump rotation is anti clockwise when viewed from above
the motor fan cover, (clockwise when viewed looking at the impeller). If rotation is in
the wrong direction correct as per section 7.5.
7.1.5.5 Start the pump and read the current variation while opening the discharge valve slowly.
Check if the current is within the rated current of the pump with the discharge valve
fully open.
7.1.5.6 If the current exceeds the rated current, record the voltage and current then stop the
pump. Check the system and provide the details listed below to VARISCO. (Refer
figure 6)
· The current and voltage during operation
· Nature and viscosity of the liquid
· Piping layout and configuration (H1,H2,H3,H4. Number and type of all bends valves
tees and fittings. Diameter and total length of the pipe
7.1.5.8 If the operating current is within the rated current, monitor the variation over 1 hr of
continuous operation. If it remains stable stop the pumps and set the level switch
positions to complete commissioning.
7.2. WIRING CHECK- POWER CABLE & SENSORS
This section describes how to check for correct wiring and how to identify the individual
cables if the original tags have been removed during installation.
7.2.1 To Check Power Cable Wiring
7.2.1.1 For both DOL and SD start ensure that the insulation resistance between each phase
and earth exceeds 10 Meg-Ohm
7.2.1.2 Direct On Line (D.O.L) Connect one of the three phase wires to the Earth Link of a
Mega Tester and measure the insulation resistance of the remaining two wires. The
insulation resistance should be less than 1 Meg-Ohm (see fig 7 below). If not, to
avoid motor damage do not operate the pump.
7.2.1.3 Star-Delta Starting Connect one of the six wires to the Earth Link of a Mega Tester
and measure the insulation resistances between the remaining five wires and attach
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K SERIES SUBMERSIBLE PUMPS