53
MYDENS
COSMOGAS
7 - USE
7.11 - Timers for the various functions
To protect the life of the appliance, improve comfort, and
increase energy savings, timers have been introduced
during operation.
These time settings are as follows:
- Pump post-circulation: every time the room thermostat
determines the end of the central heating service, the pump
continues to operate for 3 minutes;
- Central heating delay: every time the domestic hot water
service finishes, before the central heating service is
reactivated, there is a standby period of 2 minutes;
- Pump and diverter valve anti-block function: every 24
hours, the central heating pump, the domestic hot water
pump (if present) and the diverter valve are forced;
- Anti-legionella: if the appliance is connected to a tank for
preparing DHW, every seven days the tank is forced to
a temperature of 60°C to disinfect it and protect against
legionella bacteria. This function is also activated two hours
after the apppliance has been powered electrically;
- Ignition delay: in all operating modes, excluding domestic
hot water mode, every time the burner switches off, it waits
3 minutes before it ignites again.
7.12 - Pump and diverter valve anti-
block function
During the summer, the pump switches on once every 24
hours for 15 seconds in order to prevent any deposits from
blocking it.
The diverter valve and thetank pump (if present) are
activated at the same time for the same reason.
7.13 - Frost protection
a
WARNING!!! For the frost protection to be
effective,it is necessary to leave the appliance
with the main electrical supply and the gas supply
present and the two services (domestic hot water
and central heating) in the
OFF
position.
a
WARNING!!! The frost protection service of
the appliance cannot guarantee frost protection of
the central heating system, the domestic hot water
system or the building itself, or a part of the same.
The central heating pump starts automatically when the
appliance temperature reaches 7°C.
If the temperature drops further to below 2°C, the burner
also ignites to protect the appliance from the effects of
freezing.
If the appliance is not used for a long period of time (over
a year), empty it following the procedures in sections 8.19
and 8.20.
7.14 - Automatic system filling (on
request)
The appliance is usually supplied with a manual valve for
filling the central heating system.
On request, the appliance can be manufactured with
automatic system fill.
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