8 | Configuration
Installer reference guide
175
ERGA04~08DAV3(A) + EHBH/X04+08DA*V7
Daikin Altherma 3 R W
4P618958-1 – 2020.03
INFORMATION
▪ The combination of setting [4‑03]=0/2 with bivalent operation at low outdoor
temperature can result in domestic hot water shortage.
▪ The bivalent operation function has no impact on the domestic water heating
mode. The domestic hot water is still and only heated by the indoor unit.
▪ 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
[9.C.2] [7‑05] ▪ 0: Very high
▪ 1: High
▪ 2: Medium
▪ 3: Low
▪ 4: Very low
Possibility 1: Based on the outdoor temperature
Set all electricity prices ([7.5.1]~[7.5.3]) to "0" in the menu structure. Also set the
following values:
NOTICE
Do NOT use overview settings!
# Code Description
[9.C.3] [C-03] Bivalent ON 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.
[9.C.4] [C-04] Hysteresis: Defines the temperature
difference between the ON temperature and the
OFF temperature.
Permission signal X1–X2
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