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43
MYDENS 60
COSMOGAS
7 - USE
7.11.4 - Climatic adjustment: adaptation to
different climatic areas
The previously recommended values are for homes with
average insulation and for climatic areas where the external
temperature used for calculating heat requirement is
-5°C (with this data and a high temperature plant, there is
correspondence with the graphics in Figure 7.2). If the climatic
area is different, adjust parameter
2021
“Design external
temperature (winter)” in a way to obtain a flow temperature
of 67°C (40°C in the case of “Low temperature” plants), when
the external temperature is that of the calculation base of the
heat requirement.
7.11.5 - Climatic adjustment: switching the
central heating service on and off
The climatic adjustment service is completely automatic, also
regarding switch-off at the end of the season and successive
switch-on at the start of the next season via the parameter
2020
. When the external temperature rises above the value
set in this parameter, the heating switches off automatically.
When the external temperature drops back below the value
set in this parameter, the central heating service switches
back on automatically.
7.11.6 - Climatic adjustment with room
compensation
Using the “Installer menu” (see chapter 7.18) adjust the
parameter
2003
to
02
. Everything operates exactly as in
the previous chapters relative to the “Climatic adjustment”,
with the difference that now the boiler pump is always on.
The opening of the room thermostat contact translates into a
parallel downward movement of the line regarding the value
set on the parameter,
2027
as in figure 7.2 present in
the “Installer menu” (see chapter 7.18). Parameter
2027
can assume values between 0°C and 50°C. The values
recommended for this parameter are:
- 10°C for high temperature plants (radiators);
- 3°C for low temperature plants (floor).
Values of this parameter that are too high can translate into
instability of the room temperature. Values that are too low
can make the room thermostat ineffective.
The climatic adjustment with room compensation can be used
in all cases envisioned in chapter 7.11.1, with the advantage
that continuous operation of the pump manages to stabilise
and make the room temperatures uniform; especially in
the case in which several heat plant loops have the flow
resistances that are much higher than others.
7.12 - Timers of the various functions
To safeguard the lifespan of the appliance, improve the comfort
generated and increase energy saving, timings have been
introduced during operation. These timings are:
- Pump post-circulation: every time that the room thermostat
determines the end of the central heating service, the pump
continues to operate for 3 minutes;
- Central heating delay: every time that the domestic hot water
service finishes, before reactivation of the central heating
service there is a stand-by period of 2 minutes;
- Pumps anti-block and diverter valve: every 24 hours, the
central heating pump, the domestic hot water pump (if
present) and the diverter valve are forced;
- Anti-legionella; if the boiler is connected to a Indirect Water
Heater for preparation of the DHW., every seven days the
latter is forced to a temperature of 60°C to disinfect against
the legionella bacteria. This function activates also due
hours after the boiler has been powered electrically.
- Ignition delay: In all operating modes, excluding domestic
hot water mode, wait 3 minutes to ignite the burner again
when it switches off.
7.13 - Pump anti-block
The pump switches on once every 24 hours for 15 seconds
during the summer period in order to prevent any deposits
that may block it. The diverter valve and the Indirect Water
Heater pump (if present) are activated at the same time for
the same reason.
7.14 - Anti-freeze protection
ATTENTION !!!
For the anti-freeze protection
to be effective, the appliance must be left with electric
power supply and gas supply present and the two
services (domestic hot water and central heating) in the
OFF
position.
ATTENTION !!!
The anti-freeze protection
service offered by the boiler cannot guarantee the
anti-freeze protection of the central heating plant, the
domestic hot water plant or the building served or part
of the same.
The central heating pump starts automatically when the boiler
temperature reaches 10°C.
If the temperature drops further below 5°C, the burner also
ignites in a way to protect the boiler from the effects deriving
from freezing.
If the boiler is not used for a long period of time (over a year),
it is recommended to empty it following the procedure in
chapter 8.12.
7.15 - Automatic plant loading
(not recommended)
It strongly not recommended to use an automatic plant loading
device for the reasons given in chapter 5.6.
7.16 - Energy Saving
To reduce the consumption of display energy, it will switch
off automatically after 5 minutes from the last operation
performed. This function can be deactivated or the time
modified via parameter
2100
in the “Installer menu”. If the
parameter is set at
OFF
, the display will remain on constantly.
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