7
0
60T - 280T
COSMOGAS
17 - MAINTENANCE
17.4.1 - Thermal insulations
Thermal insulations must be checked every year and replaced
if they are cracked or damaged. See Figures below where the
thermal insulations (items “C” and “E”) are showned already
disassembled from heat exchanger and burner.
For replacement information see the spare parts section.
Figure 17-7 - Positioning electrodes on the burner
A - LH ignition electrode
B - RH ignition electrode
C - Detection electrode
R
H
N
C
A
E
Q
B
F
S
L
G
M
D
020022.01.009
Figure 17-6 - Thermal insulations
17.5 - Positioning the ignition and
ionisation electrodes properly
For the appliance to work well, it is essential for the
electrodes to be positioned properly (refer to figure 17-7):
- the distance between ignition electrodes “A” and “B” must
be between 2,0 and 2,5 mm;
- the distance of the ignition electrodes from the burner surface
must be between 5 and 5,5 mm;
- the distance of the ionisation electrode from the burner
surface must be between 5,5 and 6,5 mm.
To accurately position the electrodes, it is a good idea to
use a vernier caliper to respect the tolerances shown in
figure 17-7.
A = Fixing screw
B = Washer
C = Thermal Insulation
D = Stainless steel tube
E = Thermal Insulation
F = White thermal insulation
G = Burner
H = Gasket
L = Ignition electrodes
M = Screws
N = Detection Electrode
Q = White thermal insulation
R = Gasket
S = Gasket