
Tab.58 Calculating the threshold coefficient of performance
If the coefficient of performance of the heat pump is higher than the threshold coefficient of performance, the heat pump takes
priority. Otherwise only the boiler back-up is enabled. The heat pump coefficient of performance depends on the outside
temperature and the heating water set point temperature.
HP061 parame
ter
Description
HP061 = 1
Optimisation of energy costs for the consumer (factory setting): the control system chooses the cheapest
generator according to the coefficient of performance of the heat pump and according to energy cost.
The switch between the heat pump and the boiler occurs at the value of the threshold coefficient of per
formance calculated according to energy cost optimisation mode with the energy cost parameters.
HP062: Peak rate cost of electricity
HP063: Off-peak rate cost of electricity
HP064: Cost of fossil energy (oil or gas) – price per m
3
or per litre – Can be set from 0.01 to 2.50 €/kWh
:
HP061 = 2
Optimisation of primary energy consumption: The control system chooses the generator that consumes the
least primary energy.
The switch between the heat pump and the boiler occurs at the HP054 threshold coefficient of performance
value according to the primary energy consumption optimisation mode.
HP061 = 3
Optimisation of CO
2
emissions: The control system chooses the generator that emits the least CO
2
.
The switch between the heat pump and the boiler occurs at the threshold coefficient of performance value
calculated according to the CO
2
emissions optimisation mode:
HP065: Electricity CO
2
emissions in heating mode
HP066: Electricity CO
2
emissions in domestic hot water production mode
HP067: Gas or oil CO
2
emissions
HP061 = 0
No optimisation: The heat pump always starts up first, regardless of the conditions. The boiler back-up
starts up afterwards, if necessary.
Influence of outdoor temperatures and bi-valency
C COP: Coefficient of performance
C
S
Threshold coefficient of performance
T Outdoor temperature
T
1
HP051 parameter: Minimum outdoor temperature for the heat
pump to stop
T
2
HP000 parameter: Bi-valency outdoor temperature
9.3.9
Configuring a convection fan or underfloor cooling
This function is only available when the type of circuit selected is
underfloor heating or a convection fan: CP020 parameter set to 2 or 5.
Important
The heating should be activated in order for cooling to function.
1. Go to the Installer menu.
2. Access the Installer menu by entering the code 0012 by pressing the
and keys.
3. Confirm access by pressing the
key.
4. Access the EHC–04 PCB parameters by pressing the or key.
Fig.103
+
T
1
T
2
T
C
C
S
+
T
1
T
2
T
C
C
S
T
1
T
2
T
C
C
S
MW-5000542-1
9 Settings
7706696 - v04 - 11102018
AWHP-2 PBS-i
81
Содержание PBS-i WH2 Series
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