COSMOGAS MYDENS, Installation, Use And Maintenance Manual

Page: 34 / 76

34
MYDENS
COSMOGAS
6.4 - Conversion of the appliance
from one type of gas to another
- Read these instructions carefully before
changing the gas:
- The gas appliance must be installed, calibrated or
modified by specialised staff in compliance with legal
terms;
- Check and be certain that the type of gas which
is powering the appliance is compatible with the
adjustment kit in your possession;
- Do not power the boiler with gases different from those
envisioned.
Follow the instructions given below to change the gas:
1 - disconnect the electric power supply upstream from the
appliance;
2 - open the boiler casing as reported in chapter 8.2;
3 - access the control and command board as reported in
chapter 8.2;
4 - move the microswitch “B” of switch “A” from left to right
to the “ON” position (see figure 6.5);
5 - apply electric power to the boiler;
6 - the parameter
3001
will appear on the boiler’s visual
display, followed by its value;
7 - using the and keys, access the
parameter
3002.
8. - press the RESET key to make the
3002
parameter
flash
9. - using the and keys, set the value of
parameter
3002
to the new corresponding value
according to the table in figure 6.7 (for 15 kW also modify
parameter
2002
taking it to 50 as indicated in the
INSTALLER MENU chapter).
10. - press the RESET key to confirm the modification.
11.- remove voltage from the boiler, re-position the microswitch
“B” of switch “A” from right to left in “OFF” position (see figure
6.5).
12. - close the gas supply;
13. - remove the air manifold making sure to turn it
externally and then slide it out of the fan inlet (see figure
6.2, detail “C”);
15. - remove the gas inlet pipe via the two fittings (see
figure 6.2, details “H” and “L”)
16. - remove the clamping spring “M” from the seat “N”
releasing the valve “P” (See figure 6.3, detail “M”)
17. - slide the gas valve “P” out upwards;
18. - replace the gas nozzle “R” (see figure 6.4) with an
appropriate one according to that stated in figure 6.7
under “Diameter of the gas nozzle”;
19. - remount the gas valve (see figure 6.3, detail “P”),
making sure to reposition the spring “M”.
20. - remove the gas supply pipe via the two fittings (see
figure 6.2, details “H” and “L”);
21. - re-mount the air manifold (see figure 6.2, detail “C”);
22. - open the gas cock;
23. - check for any gas leaks using the relevant means of
control.
L
E
H
F
A
G
C
D
B
020002.01.040
N
P
M
Q
O
020002.01.041
R
020002.01.042
Figure 6.4 - Replacing the gas nozzle
Figure 6.3 - Removing the gas valve
Figure 6.2 - Removing the air manifold
6 - OPERATING