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4.4.2 - Booster heater
Booster heater (electric heater inside the domestic hot
water tank) is activated if domestic hot water temperature
is below the setpoint and the schedule allows electric
heater activation.
This function is only available if domestic hot water is
managed by system control (code 133 = 1 or 2).
It is possible to force the activation of booster heater by
setting code 1.5 = 1.
The code is automatically reset when the desired setpoint
is reached.
If domestic hot water temperature sensor is in diagnostics,
booster heater is never activated.
4.4.3 - Disinfection (antilegionella)
This function is only available if domestic hot water is
managed by system control.
The disinfection function disinfects the domestic hot water
tank by periodically heating water to a specific
temperature for a defined time period.
The disinfection function settings must be configured
according to national and local regulations.
During disinfection function, booster heater is activated if
needed, regardless the schedule.
In case of boiler backup, priority lines are adjusted to
optimise energy efficiency.
Note: If domestic water sensor is in diagnostics or
disinfection function has not been completed within the
defined timeframe, domestic hot water production is
stopped, unless code 1.3 is set to 1.
The system will try to perform the disinfection cycle on
the next scheduled day.
Code 1.3 is self reset to 0 when domestic water sensor is
working and disinfection function is completed.
4.5 - Frost Protection
This function is active in all the operative modes, including
OFF.
It prevents water freezing in the circuit and in the
domestic water tank.
The activation temperature is determined by code 111.
4.6 - Home Antifreeze Protection
Activate this function through code 1.0.
Once it is enabled, this function is active in OFF mode and
in Domestic Hot Water mode.
It prevents the zone temperature to go below a specific
value, defined by code 2.
It works only if room temperature is measured by the
system (code 105.0=1 or 4).
4.7 - Water Pump Management
This function works only if room temperature is measured
by the system (code 105.0 = 1 or 4).
If code 1.6 = 0, water pump is always running during space
heating/cooling operations.
If code 1.6 = 1, water pump is turned OFF if room
temperature overshoots the setpoint value by code 4 ( °C),
and turned ON if room temperature is below (in heating,
above in cooling) room setpoint by code 4 ( °C).
4.8 - Pump Unblocking Procedure
This function is active in all operative modes, including
OFF.
If the water pump is OFF for 24 hrs, it is activated for
some time to avoid locking.
4.9 - Output Configuration
Multi-purpose output (see paragraph Terminal Block
Description) can be configured to perform different
functions (code 108).
4.9.1 - Fan coil
The output can be used to turn ON/OFF fan coil units.
The available options are shown in the variable table.
4.9.2 - Dehumidifier
The output is used to turn ON/OFF a dehumidifier.
Dehumidifier is turned on in Cool mode, when humidity is
higher than the value of code 110.
It works only if room control is done by user interface
(code 105.0 = 1 or 4).
4.9.3 - Alarms/Defrosting
The output is activated to signal some specific conditions.
See variable table for details.
4.10 - Pump Down
Setting code 147 = 10, it is possible to force the outdoor
unit in Cool mode (also in case of Heating only systems)
for 5 minutes, to allow the pump down of the refrigerant.
After 5 minutes of operation, the code is automatically
reset to 0.
After Pump Down, the unit will remain OFF until the
electrical power is reset.
4.11 - Silent Mode
It is possible to reduce the maximum compressor
frequency in defined time periods.
See user interface manual.
Frequency reduction is expressed as % of maximum
frequency and is set by code 3.
When Silent mode is activated, the outdoor unit will be
less noisy, but also less powerful, therefore backup and
booster heaters can be used more often.
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