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Start-up - initial settings and functions
7.4 dT1_AHS_ON (standard: 5 - settable: 2/20)
Defines the range between the water supply temperature (T1) and the setpoint (T1S) beyond which the boiler
is switched on. When T1S - T1 ≥ dT1S_AHS_O, the boiler is switched on.
7.5 t_AHS_DELAY (standard: 30 - settable: 5/120)
Defines the minimum minutes between compressor start-up and boiler start-up.
7.6 T4_AHS_ON (standard: -5 - settable: -15/30)
Defines the outdoor temperature below which the boiler can be used. If the outdoor temperature is higher
than T4_AHS_ON, the heater cannot be used.
7.7 IBH_LOCATE (standard: 0 - settable: 0/1)
Reserved for factory settings.
7.8 P_IBH1 (standard: 0 - settable: 0/20)
Defines the electric power of the heater, if present: the value set here is used to calculate the heat output
and eciency of the unit.
IBH1 must be set to the power of the first stage. The parameters do not count the power of external elements
because the power port is dierent.
7.9 P_IBH2 (standard: 0 - settable: 0/20)
Reserved for factory settings.
7.10 P_TBH (standard: 2 - settable: 0/20)
Defines the electric power of the DHW tank heater, if present: the value set here is used to calculate the heat
output and eciency of the unit.
7.11 EnSWITCHPDC (standard: YES - settable: YES/NO)
Enables/disables the intelligent function for hybrid € switch heat pumps.
The € switch function analyses the operating conditions of the unit and uses an algorithm to calculate the
minimum eciency that the heat pump must have in order to continue to operate more economically than
the boiler. Should the heat pump operate below this eciency, the unit switches o the heat pump and only
uses the boiler.
The € switch function uses the cost of fuel gas (€/Smc from a bill, to be entered in parameter GAS_COST)
and the cost of electricity (€/kWh from a bill, to be entered in parameter ELE_COST).
L
NOTE
The logics that activate the boiler to supplement the capacity of the heat pump remain unchanged even
with the € switch function on.
7.12 GAS_COST (standard: 0.85 - settable: 0/5)
Defines the cost of fuel gas used to power the boiler (in €/Smc, from a bill).
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NOTE
In the absence of this value, it can be estimated with data retrieved from the last bills using the simplified
formula: Energy cost = (Total amount of bills [€])/(Total amount of energy consumed [Smc]). In reality, the method
is simplified because there are a number of fixed costs in the bill that are independent of actual fuel con-
sumption. The precise calculation is beyond the scope of this manual.
7.13 ELE_COST (standard: 0.20 - settable: 0/5)
Defines the cost of electricity used to power the unit (in €/kWh, from a bill).
L
NOTE
In the absence of this value, it can be estimated with data retrieved from the last bills using the simplified
formula: Energy cost = (Total amount of bills [€])/(Total amount of energy consumed [Smc]). In reality, the method
is simplified because there are a number of fixed costs in the bill that are independent of actual fuel con-
sumption. The precise calculation is beyond the scope of this manual.
The unit manages the AHS setpoint dynamically with a 0-10V signal, through the maximum and minimum
setpoint parameters set in the boiler.
7.14 MAX_SETHEATER (standard: 75 - settable: 0/75)
Defines the maximum setpoint value that can be reached by the boiler, which is used to control the 0-10V
signal.
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