Dutypoint VT Booster Set, Руководство по эксплуатации и обслуживанию, Страница: 7 / 123

Hand Control Mode
In the 'HAND' position the pump(s) controlled by the switch will normally run at full speed and
completely independently of any control devices, and can result in pump(s) running against a
closed valve head if there is no draw.
This can cause the system to be maintained at the maximum pressure produced by the pump plus
any incoming pressure and additional pressure caused by water surge and can potentially damage
the pump and other parts of the system.
The 'HAND' option should only be used with a competent operator in attendance, or when
there is a continued demand sufficient to provide constant flow through the pumps to
maintain the running pressure of the system to an acceptable level.
Pump Servicing
• Familiarise yourself with the relevant contents of this manual
• Installation, maintenance and repair work must only be carried out by trained, skilled and
suitably qualified personnel.
• Disconnect or lock-out the power source to ensure that the pump(s) will remain
inoperative.
Locking out the equipment by switching off the release mechanism or
set value WILL NOT prevent accidental starting of the motor.
• Allow the pump(s) to cool if over-heated.
•
CLOSE
the isolating valves on the suction and discharge connections of the affected
pump(s).
•
VENT
the pump(s) slowly and cautiously – Refer to the relevant section of this manual.
•
DRAIN
the pump(s).
High Voltages
Especially applicable when Variable Speed Controllers (Inverters) are fitted.
Page 7
VT Booster Set