9
DYNAMIC FORCE-OFF
To make the most of the machine's operational limits, an algorithm called dynamic ForceOff was introduced from software version 4.0. This function limits the water outlet
temperature according to the outside air temperature, going up to the operating limits and replacing the compressor with the resistance (if present) if the set is not reached.
Parameter(N22)=
Parameter(N20)=
EXAMPLE: You want to produce domestic hot water with a setpoint at 55° and the air temperature is -12.5°. According to the parameters entered in the figure, the ForceOff
trips at 50.5°. The compressor will work until the outlet temperature of 50.5° is reached. At this point it is switched off (respecting the minimum ON time) and the resistance
(if present) with set=55° is used.
— When the operating limits are exceeded, the resistance is activated in replacement mode even if the machine is working in the integration area.
— When Dynamic Force Off is tripped in Integrative mode, the replacement resistance is used and the resistance set becomes that of the compressor.
— This function can be used regardless of the presence of the electrical resistance, to protect the compressor;
— When the compressor is in Force off, the compressor icon flashes on the display;
— With the boiler accessory enabled, tripping of the dynamic ForceOff does not activate the switching on of the replacement boiler as the pump would switch off and con-
sequently the heat pump would lose control over the temperature.
10 MULTI-FUNCTION INPUT
It is possible to use input B1 as a multi-function input.
Enable the multi-function input via the Installer menu parameter(N11).
To configure the multi-function input, you must select which type of input you want to use, set the min and max limits that the input can have, and set the min and max limits
of the function you want to use accordingly. See parameters N11, N36, N37, N38, N39, N40, N41, N42, N43, N44, N45, N46, N47.
A
Power requested
B
Multi-function input
TUA (°C)
RES
A
Parameter(N19)
A
Max
100%
Min
0%
Min
0V
RES
CP
CP
B
Parameter(N21)
Max
0V
TAE (°C)
B
25