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Application guidelines
Installer reference guide
52
ERLA11~W1 + EBSH/X(B)11+16P30+50DF
Daikin Altherma 3 R ECH₂O
4P663482-1A – 2021.11
▪
Make sure the return water to the storage tank does NOT exceed 95°C. To do so:
-
Set the desired water temperature via the auxiliary boiler controller to
maximum 95°C.
-
Install an aquastat valve in the return water flow of the heat pump. Set the
aquastat valve to close above 95°C and to open below 95°C.
▪
The external heat source is controlled by the ON/OFF signal on the indoor unit
(X12M/3 and X12M/4). See
"9.3.10 To connect the changeover to external heat
143].
Configuration
Via the user interface (configuration wizard):
▪
Set the use of an indirect bivalent system as external heat source, either for
domestic hot water heating only, or also for space heating.
▪
Set the tank boiler hysteresis.
237] for more information on configuration.
NOTICE
▪
Make sure the tank boiler hysteresis has enough differential to prevent frequent
changeover between indoor unit and auxiliary boiler.
▪
Because the outdoor temperature is measured by the outdoor unit air
thermistor, install the outdoor unit in the shadow so that it is NOT influenced or
turned ON/OFF by direct sunlight.
▪
Frequent changeover may cause corrosion of the auxiliary boiler.
6.3.3 Setting up a solar system via drainback connection
A pressureless solar system can be directly connected to the storage tank via
drainback connection.
Setup
1
Integrate the solar system as follows:
d
a
b
c
a
Drainback solar flow connection (optional solar drainback kit)
b
Flow sensor (optional solar drainback kit)
c
Flow rate limiter (optional)
d
Drainback connection
CAUTION
The solar panels MUST be installed higher than the indoor unit. A downward slope
with minimum gradient of the solar piping MUST be guaranteed. This is to allow the
solar system to completely drain and thereby to avoid frost damages.
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