Xylem O&M Mini V Series Variable Speed - Manual (Page 3)

Discharge pipe work
fitted to the end not used. A flexible connector fitted between the booster discharge manifold and the system
connection pipe will help prevent the transmission of noise/vibration. An isolation valve should be provided
between the booster discharge line and the system to aid maintenance. The discharge pipe work should be
sized to achieve a maximum velocity of approximately 2.5m/s.
Pressure vessels
Variable speed booster sets can operate with relatively small pressure vessels; each set is supplied with 1 x 8
or 24lt vessel for each pump depending on pump type which is more than adequate for the set to function
correctly. Larger vessel can be added if required. If stand alone vessels are added they should have an
isolation valve and drain cock fitted to allow the vessel to be isolated from the system and drained to check
the pre-charge pressure.
The vessel pre-charge should be set to approximately 0.2 bar below the pump stating pressure.
Teknospeed basic setting details
The Teknospeed has only one adjustable parameter which is the system set point, to adjust see item 14
below under commissioning.
Commissioning
With the main power isolated check:
1. The break tank feeding the set is filled with water and the ball valve is set to the correct height.
2. The set/system vessels have been charged with Nitrogen to the correct pressure (set point -0.2 bar).
3. Open suction line isolation valve.
4. Open suction and discharge pump isolation valves.
5. Close main discharge isolation valve.
6. Open the pump vents at the top of each pump.
7. Allow all air to escape until water flows freely.
8. Close pump vent valves.
9. Open discharge valve.
10. Ensure all vessel valves are open.
11. Switch the main power supply on.
12. allow water to flow and clear air through the system
13. close discharge valve and check pressure reading on pressure gauge
14. To raise or lower the system set point use the screwdriver provided and turn the adjusting screw in the
inverter housing clockwise to increase pressure, anti-clockwise to decrease pressure. When
decreasing pressure it may be necessary to open a discharge outlet to release pressure after adjusting,
close discharge and pump should stop after approximately 60 seconds. Do not set the system set point
higher than the pump can produce as the pump will not stop. See Fig. 1 below for adjusting screw
position.
See Teknospeed O&M for more in depth pump details.
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mini V booster set o and m instructions:Layout 1 11/05/2012 15:20 Page 3