Daikin EWYA004D2V3P Installer's Reference Manual page 174

11 | Configuration
Installer reference guide
174
X2M
YC Y1 Y2 Y3 Y4
# Code
9.C.3 [C-03]
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
OFF ON
SS1
X1M
Range: –25°C~25°C (step: 1°C)
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)
Description
Example
12 14
EWAA004~008D + EWYA004~008D
Packaged air-cooled water chillers
and packaged air to water heat pumps
4P688013-1B – 2022.09