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4. If the boiler is only lightly calcified (scaled) use 1 x 200ml descaler liquid bottle, if the boiler is heavily calcified use 2
x 200ml descaler bottles, if you are unsure we recommend you use 2 x 200ml bottles.
5. Shake the bottle gently then carefully cut the top of the bottle nozzle open with a pair of scissors.
6. Carefully and slowly empty the contents of the descaler bottle into the boiler vent (A7), if access for the bottle
nozzle is difficult a plastic funnel can be used to help.
⚠
Take care during this step as steam is expected to exit the vent (A7) as the descale solution is added.
7. Take note of the time and wait for no longer than 30 minutes maximum for the descaler liquid to work. It is normal
for an odour to be present during this time.
8. Firmly reattach the flexible connector (B9) to the boiler vent (A7). Wear suitable gloves to ensure your safety.
9. Switch on the PROBOIL at the front control panel (see user guide for more details).
10. Dispense the entire contents of the boiler using the key fob, before immediately switching off the PROBOIL at the
front control panel (see
11. Drain the remaining water from the tank (see
12. Close the drain (A12).
13. Switch on the PROBOIL at the front control panel (see
14. Allow the PROBOIL to fully fill and heat to back to a maximum temperature of 80°C this process will take a minimum
of 20 minutes, again it is normal for an odour to be present during this time.
15. Repeat steps 10-12 draining the boiler entirely.
16. Disconnect and stow the drain pipe (A14) & connector (A13) securely replace the drain cover (A11) and screw (A10).
17. If required, adjust the temperature to your previous preference (see
Should any taste or odour persist in normal use after flushing the unit twice, repeat the flushing procedure as
described in steps 10 to 14 until it subsides.
In the event that the boiler is heavily scaled and following the above steps did not remove all the scale, repeat
the complete descaling procedure. If further descaling does not clear any descale warning on the PROBOIL, please
contact the service agent using the labelled contact details on top of the boiler.
If misplaced you can download a copy of the full user guide at
using the product
for more details).
draining section
of the user guide for more details).
using the product
in user guide for more details).
user guide
www.proboil.co.uk
for more details).
Proboil descaler guide v1-0a
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