55
MYDENS 60
COSMOGAS
8 - MAINTENANCE
Figure 8.3 - positioning the electrodes on the
burner
8.5 - Correct positioning of the
ignition and ionising electrodes
For good working order of the appliance, it is indispensable
that the electrodes are positioned correctly (refer to figure
8.3):
- the distance between the ignition electrodes “A” and “B”,
must be between 2.0 and 2.5 mm;
- the distance between the ignition electrodes from the burner
surface must be between 5 and 5.5 mm;
- the distance of the ionisation electrode from the surface of
the burner must be between 5.5 and 6.5 mm.
8.6 - Removing the flow meter
The flow meter is used to measure the water flow rate
inside the boiler. If it has to be replaced, proceed as follows
(refer to figure 8.4):
1.- empty the appliance water, following the procedure in
chapter 8.12;
2.- access the internal components of the appliance
following chapter 8.2;
3.- remove the burner unit following chapter 8.3;
4.- loosen the fittings “B” and “C”;
5.- extract the flow meter “A”
paying attention to the
direction of the flow, as per arrow printed on the flow
meter
;
6.- replace the flow meter;
7.- during mounting, make sure the flow meter is positioned
correctly (step highlighted in point 4).
8.7 - Removing the safety valve
The safety valve (detail “A” in figure 8.5) protects the boiler
from over pressures. If it has to be replaced, proceed as
follows (refer to figure 8.5):
1.- empty the appliance, following the procedure in chapter
8.12;
2.- access the internal components of the appliance
following chapter 8.2;
3.- remove the burner unit following chapter 8.3;
4.- disconnect the drain pipe from the safety valve,
loosening the sealing spring;
5.- unscrew the fixing fitting of the safety valve to the pipe;
6.- extract the safety valve “A” upwards and replace it by
restoring the drain pipe of the same as it was previously
mounted.
Figure 8.4 - Removing the flow meter
Figure 8.5 - Removing the safety valve
A
020005.01.009
B
C
A
020005.01.010
