COSMOGAS MYDENS, Installation, Use And Maintenance Manual

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41 MYDENS
7.3 - Generalities
During operation the display shows the boiler operating
state as well as other information as indicated in chapter
7.19 (Diagnostics).
Other parameters can be consulted through the
“User menu” (see chapter 7.17), which are useful for
understanding operation of the appliance and to control the
latest blocks or errors occurring.
After 5 minutes of normal operation, the display switches off
completely to save energy. Just press any key to switch it
back on.
In the case of any anomaly, the display switches back on
automatically. This function can be modified by following
chapter 7.16 (Energy saving).
7.4 - Ignition procedure
1.- open the gas cock;
2.- power the boiler electrically;
3.- adjust the domestic hot water temperature and of the
central heating respectively as per chapters 7.8 and 7.9.
The command and control equipment will switch the burner on.
If ignition does not take place within 20 seconds, the boiler
automatically re-attempts ignition 3 times, after which if it still
does not ignite, it blocks and the display will indicate
Loc 1
.
Press the RESET key to restore the normal operating
conditions.
The boiler will automatically attempt a new ignition.
ATTENTION !!! If shutdown due to blocking is
repeated frequently, contact a qualified technician to reset
the normal operating conditions.
Once the boiler has been ignited correctly, it will continue to
operate for the service requested.
7.5 - “User menu”
Entry into the “User menu” is highlighted by the visual display
“M”, in figure 7.1, which indicates parameters that can assume
values from
1001
to
1999
. To enter the “User menu”:
1.- hold the RESET key down for 2 seconds until the visual
display “M” shows
1001
;
2.- press the and keys to scroll the parameters
situated inside the user menu;
3.- hold down the RESET key for more than 2 seconds to
exit the “User menu”;
If no key is pressed for more than 60 seconds, the menu
is exited automatically.
The parameters in chapter 7.17 can be queried in this
menu.
7.6 - Summer operating mode
Whenever the central heating function is to be interrupted
for a long period of time, leaving only the domestic hot water
function operating, adjust the central heating temperature to
minimum using the
or keys until
the word
0FF
appears.
7.7 - Winter operating mode
In winter operating mode, using the pump, the boiler sends
the water to the plant at the temperature set using the
or keys.
When the temperature inside the boiler approaches the
temperature set, the burner starts to modulate the flame until
the power is reduced to the effective requirement of the plant.
If the temperature tends to rise further, the burner stops.
At the same time, the pump that sends water to the plant
is switched on and off by the room thermostat. This can be
noted because the
indicator flashes when the pump is
on, while it remains on with a fixed light when the pump is off.
The pump may initially make a noise. This is due to the
presence of residual air in the hydraulic plant, which will
disappear quickly, without any intervention.
For rational use of the boiler, it is recommended to keep the
central heating temperature, adjusted using the
or
keys, at the lowest value possible, compatibility with
the temperature requested in the rooms. If the winter season
is particularly cold, meaning the room temperature can no
longer be maintained, raise the central heating temperature
to higher values.
Figure 7.2 - Plant fill cock
B A C
02002.01.044
Key for figure 7.2
A = Plant fill knob
B = Closing direction
C = Opening direction
COSMOGAS
7 - USE