3
Commissioning
1. Fill the system with water via the quick fill filling loop to the system fill pressure, this filling loop must comply
with local water authority bylaws and contain double check valves. The filling loop must be
completely removed after the system has been filled.
The pressurisation unit must never be used to fill the system.
The maximum running time for pumps fitted to this product must not exceed 4 hours in any 24
hour period.
It is essential that all air is allowed to escape freely via air vents and radiator vents etc.
All air must be evacuated from the system for this product to operate correctly.
2. Turn on the water supply feeding the product break tank.
Water treatment crystals/chemicals must never be introduced to the system via the break tank.
3. Check that pumps have been fully evacuated of all air by removing the bleed screw of each pump where
fitted and allow water to escape until no air is present. Replace bleed screws.
4. Before the unit is opened up to the main system pressure check the pre-charge in the internal vessel. The
pre-charge should be set to approximately 0.35bar below the system fill pressure. Charge as necessary with
Nitrogen or dry air. Open system valve to Presfix Beta unit.
System set points
System set points are entered via the front panel interface.
To stop unauthorised adjustment of set points a lock switch is positioned on the back of the display PCB this
will need to be switched to the unlocked position to enable set points to be changed.
Switch the selector switch to the appropriate set point and the display will show the value of that
particular set point, if the value is blinking on/off the value is able to be modified, if the value is
not blinking it means that the lock is active and the value will not be able to be changed.
To increase or decrease the value press the up/down buttons. The longer you press the button
the quicker the change rate.
Once you have selected the correct value move the selector switch to next set point that you
wish to change,
the values in the previous set point will be automatically saved.
Once you have entered data into all relevant set point parameters the selector switch should be set to the
Auto position. If the data is to be locked then switch the lock switch on the rear of display PCB to the locked
position.
Set point description
Delay Start
This set point is adjustable between 0-10 seconds and is used to delay starting the pressurisation pump for
the set period. This can be useful especially on chilled water system where it can be very difficult to remove
all air.
Low pressure set point
This set point is typically set approximately 0.4 bar below the fill point.
High pressure set point
This set point is typically set approximately 0.2 bar above the final working pressure.
Duty pump cut in
This should be set to the static height of the building + 0.35 bar. The standby set points are automatically
set from the duty pump set points. The system set point must be set to the same pressure on both
system displays.
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