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Configuration
Installer reference guide
153
E EHFH03S18D
Daikin Altherma 3 R F
4P596806-1C – 2022.09
▪
If bivalent is disabled: Space heating is only done by the indoor unit within the
operation range. The permission signal for the auxiliary boiler is always inactive.
INFORMATION
The permission signal for the auxiliary boiler is located on the EKRP1HBAA (digital I/O
PCB). When it is activated, the contact X1, X2 is closed and open when it is
deactivated. See illustration below for the schematic location of this contact.
YC Y1 Y2 Y3 Y4
X1
X2
X3
X4
OFF ON
X2M
SS1
X1M
Boiler efficiency
Depending on the used boiler, this should be chosen as follows:
#
Code
Description
N/A
[7‑05]
Boiler efficiency
▪
0:
Very high
▪
1:
High
▪
2:
Medium
▪
3:
Low
▪
4:
Very low
You can set the following values based on the outdoor temperature:
#
Code
Description
N/A
[C-03]
Bivalent activation temperature: defines the
outdoor temperature below which the
permission signal for the auxiliary boiler is active
(X1 and X2 on EKRP1HBAA is closed) and space
heating by indoor unit is stopped.
–25°C~25°C
N/A
[C-04]
Bivalent hysteresis temperature: defines the
temperature difference between the ON
temperature and the OFF temperature.
2°C~10°C
Permission signal X1–X2
T
A
[C-03]
[C-04]
a
b
T
A
Outdoor temperature
[C-03]
Bivalent ON temperature (fixed)
a
Auxiliary boiler active
b
Auxiliary boiler inactive
