Troubleshooting
Q Water is constantly running or dripping in the tundish
and water is overflowing
1
This indicates that the water pressure is too high; above the
5 bar (75psi) stipulated maximum. In normal operation the
pressure relief valve will allow water to drip in the tundish
for approximately 20 minutes after the tank is switched on.
Thereafter it will drip periodically, after water is drawn off
and as the tank comes back up to temperature. Check the
water pressure at a low demand period (mid morning or mid
afternoon). If it exceeds 5 bar (75psi) it will be necessary to
install a 3-4 bar pressure limiting valve. A suitable pressure
reducing valve can be purchased at www.frankefilterflow.
co.uk or from a plumber’s merchant. If you want to stop the
flow of water in the meantime, first switch off the electrical
to the tank then turn off the water supply to the tank at the
green handled stop valve underneath your sink.
2
The distance between the bottom of the tundish and the waste
inlet connection is less than the stipulated 500mm minimum.
Q The flow of boiling water splutters more than
shown in the video
1
Check for kinks in the flexible hoses supplying water to the system.
2
Check that the stop valve in the pressure relief valve is fully
open – the smaller of the two knobs positioned on the left side
of the valve – by rotating it clockwise.
3
Check the water pressure. As previously stated, it must be no
lower than 1.5 bar or higher than 5bar. Check the pressure with
a proper gauge; a visual estimate looking at the flow from the
outlet is not a reliable measure. The flow through your hot water
tap may be less than you are used to due to the complex nature
of the internal waterways. Water pressure between 3 and 4 bar
is recommended for optimum performance.
4
Remove the filter cartridge and try running the system without
the cartridge installed to determine whether the cartridge is
blocked and restricting the flow.
Q The cold water flow from the tap is slow
Check that the filter is installed correctly. It should be filtering
the cold water to the boiler only, not both the cold water
supply to the tap and to the boiler.
If the filter unit is correctly installed it may be that the filter
cartridge is clogged and needs replacing.
Q The boiling water function is dispensing cold water
instead of boiling water
Check that the electrical supply is correctly connected and
there is power to the tank.
Check if the thermal cut-off has tripped out. Refer to Resetting
the thermal cut-out in the installation guide and follow the
procedure to reset the tank. If this doesn’t work, or if the
same thing happens repeatedly, contact our service provider.
Q Poor hot water flow (not the boiling water)
Check the hot water pressure. Please be aware that most
Gravity fed hot water systems will not provide sufficient
pressure to the hot side without a suitable pump installed.
Q Despite having a filter installed, froth (and/or)
scum is forming
The function of the filter is to protect the boiling water tank and
remove chlorine to improve taste. It will not remove the calcium
and magnesium in hard water areas that causes the frothy
appearance. Calcium and Magnesium are harmless and are
considered beneficial minerals.
Q The heating element causes a short circuit
Refer the matter to your service provider.
Q The tap is spluttering and spitting
The tap dispenses boiling water at the outlet of the spout
and, as a consequence, there will be some splutter, steam
and noise. This can be quite off-putting at first, but any
concerns are quickly dispensed with once the simple
technique for operating the boiling water is understood.
Please visit the link below
www.franke.co.uk/minerva
then click ‘How it works’ to see how the tap should dispense
boiling water.
You will see the operator rotate the tap handle carefully to run
off the lag of non-boiling water until the water starts to steam;
they then stop, put the receptacle completely over the end of
the taps spout and continues to dispense the boiling water,
at the same time gradually lowering the receptacle. Adopting
this method ensures all of the boiling water is contained and
prevents any splashing your hands.
