Automatic System Against Boiler Emptying; Boiler Maintenance - Krüger Technology KGV8000 Manual De Instrucciones

8. AUTOMATIC SYSTEM AGAINST BOILER EMPTYING

In order to prevent the boiler to empty, the machine controls water pump functioning by varying
intensity and frequency. Under conditions of normal use and efficiency, the pump is controlled by
the electronic board with a frequency depending on the amount of water in the boiler and on the
steam used, in order to maintain an optimal ratio. However, it may happen that the fill has obstacles
/ barriers (air bubbles, dirt from the tank, limestone, various cracks ...). In these cases, the frequency
of pump use is automatically increased for several minutes in order to overcome the obstacle, if
successful, the operation does not affect machine performance and the user can continue working
without interruption (during this process the pump vibration may increase significantly.
If the problem persists and is not solved automatically, to avoid emptying the boiler, power to heating
element is removed, while the pump continues to be driven at high frequencies. In this situation, the
pressure drops dramatically and it sets to zero in a few minutes. In this case, you should switch off
and then on the machine (turn the main switch to 0 and then to 1 after a few seconds). The machine
will control the main functions and will look further to solve the problem controlling the water pump
continuously. If the problem is resolved, the machine will return to READY STEAM status ensuring full
functionality, but if the problem persists contact the service centre / seller for a service call. The main
causes of failures in the system of filling water in the boiler are: limestone, dirt in the water tanks, air
bubbles in the tank pipes, breakage of the pump / deaeration valve due to the use of products other
than those recommended by the manufacturer.
9. BOILER'S MAINTENANCE
The machine must be vertically positioned on a flat
surface. (Before performing any maintenance operation,
unplug the appliance from the electrical outlet).
In order to minimize the negative effects of limestone, the
boiler should be fully drained every 2/3 months. Act as
follows:
1 – make sure that the appliance has cooled down
2 – using the enclosed box spanner (35, Fig. 13), unscrew
the draining nut (Fig. 10)
3 – carefully shake the appliance and allow the water and
the limescale in the boiler to run out
4 – screw the draining nut and the plastic cap back on
This procedure contributes significantly to avoid
problems arising from limestone. Kruger steam
production, expected that in the boiler, there is always
a quantity of water, so that the limestone remains in
solution and does not solidify. This allows first to severely
restrict the incidence of damage caused by limestone
and then to be able to easily remove it from the boiler
through the operation of draining.
Caution: Burn danger! Drainage operation must
be carried out following the above described
instructions. Fig. 12
Fig. 12
10
25
Fig. 10