Daikin Altherma 3 H HT F Installer's Reference Manual page 218

10 | Configuration
Installer reference guide
218
# Code
9.C.4 [C-04]
To determine the value of [C‑03], proceed as follows:
1 Determine the COP (= coefficient of performance) using the formula:
Formula
COP = (Electricity price / gas price)
boiler efficiency
(a)
Make sure to use the same units of measurement for the electricity price and gas price
(example: both c€/kWh).
2 Determine the value of [C‑03] using the graph. For an example, see the table
legend.
COP
6
5
4
3
2
1
0
-14 -12 -10 -8 -6
a [C‑03]=2.5 in case of COP=3 and LWT=35°C
b [C‑03]=10.5 in case of COP=3 and LWT=55°C
NOTICE
Make sure to set the value of [5‑01] at least 1°C higher than the value of [C‑03].
Electricity and gas prices
INFORMATION
To set electricity and gas price values, do NOT use overview settings. Set them in the
menu structure instead ([7.5.1], [7.5.2], [7.5.3], and [7.6]). For more information on
how to set the energy prices, see the operation manual and the user reference
guide.
INFORMATION
Solar panels. If solar panels are used, set the electricity price value very low to
promote the use of the heat pump.
# Code
[7.5.1] N/A
Range: 2°C~10°C (step: 1°C)
The higher the value of [C‑04], the higher the
accuracy of the switch-over between the heat
pump system and the auxiliary boiler.
(a)
× If:
▪ Electricity price: 20 c€/kWh
▪ Gas price: 6 c€/kWh
▪ Boiler efficiency: 0.9
Then: COP = (20/6)×0.9 = 3
-4 -2 0 2 4 6 8 10
2.5 (a)
10.5 (b)
User settings > Electricity price >
High
Description
Example
12 14
Description
EPRA14~18D + ETVH16SU18+23E
Daikin Altherma 3 H HT F
4P644738-1A – 2022.03