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7 Configuration
7.4.4
Central water loop freezing temperature
The temperature at which the central water loop fluid freezes
depends on the type and concentration of the anti-freeze added to it.
The following setting defines the freeze up prevention limit
temperature of the unit. To allow for temperature measurement
tolerances, the central water loop fluid MUST resist to a lower
temperature than the defined setting.
General rule: the freeze up prevention limit temperature of the unit
MUST be 10°C lower than the minimum temperature of the central
water loop fluid entering the unit.
Example: When the minimum temperature of the central water loop
fluid entering the unit in a certain application is –2°C, then the freeze
up prevention limit temperature of the unit MUST be set to –12°C or
lower. Result will be that the central water loop mixture may NOT
freeze above that temperature. To prevent freezing of the unit, check
the type and concentration of the central water loop fluid carefully.
#
Code
Water loop freezing temperature
[9.M]
[A‑04]
▪ 0: 2°C
▪ 1: –2°C
▪ 2: –4°C
▪ 3: –6°C
▪ 4: –9°C
▪ 5: –12°C
▪ 6: –15°C
▪ 7: –18°C
Installation manual
36
Description
NOTICE
The Water loop freezing temperature setting can be
modified and read out in [9.M].
After changing the setting in [9.M] or in the field settings
overview [9.I], wait 10 seconds before restarting the unit
via the user interface to ensure that the setting is correctly
saved in the memory.
This setting can ONLY be modified if the communication
between hydro module and compressor module is present.
The
communication
compressor module is NOT guaranteed and/or applicable
if:
▪ error "U4" appears on the user interface,
▪ the heat pump module is connected to preferential kWh
rate power supply where power supply is interrupted
and preferential kWh rate power supply is activated.
7.4.5
Central water loop valve opening
By default, the central water loop valve is closed if there is no
demand. To avoid water stagnation over longer periods, set the unit
to regularly open the valve during a short time.
#
Code
[9.R]
[3‑0A]
Water loop valve opening,
Frequency:
▪ 0: Off
▪ 1: Every day
▪ 2: Every Week
[3‑0B]
Water loop valve opening, Duration:
▪ 30~120 minutes, step 30 minutes
between
hydro
module
and
Description
EWSAH/X06UD
Daikin Altherma 3 WS
4P675760-1C – 2023.02
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