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Cont ...
7 OPERATION
7.11 Normal operation:
The ‘Home’ screen will display the status of the tank water level, system
pressure and if any pump is running. Pressing the return key (D) will get back
to this screen.
A green ‘Power on’ light will be displayed on the front of the unit.
More detailed information is available by scrolling up or down to display:-
System pressure
System errors i.e. pump fail, low or high pressure or none.
System fill status on or off
Pump activity log
Last pump run
Alarm reset
Settings menu (access to more functions)
Advanced setting menu (access to more functions)
Test menu (access to more functions)
During normal operation the unit will monitor the system pressure and re-
pressurise the system if the system pressure drops below the system pressure
– differential pressure. See Fig. 20.
Example: System pressure 2 bar, differential pressure 0.5 bar, pump will start
to re-pressurise system at 1.5 bar system pressure and stop at a system
pressure of 2 bar.
During the normal filling operation of the pressurisation unit the pressure
displayed on the screen may be shown slightly higher than the set pressure
whilst the pump is running. As soon as the pump stops this displayed reading
will settle back to the actual system pressure.
During the normal operation of the pressurised system, the system pressure
will fluctuate due to expansion and contraction of the water as the system
temperature changes.
FULL
ON
2.10 bar
OFF
21
Fig. 24
Tank full
Pump 1
running
Pump 2 is not
running
System pressure is
2.10 bar
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