Daikin EWYA004D2V3P Installer's Reference Manual page 165

Glycol filled system
Water pipe freeze prevention
EWAA004~008D + EWYA004~008D
Packaged air-cooled water chillers
and packaged air to water heat pumps
4P688013-1B – 2022.09
INFORMATION
If a heat pump failure occurs and Emergency is set to Manual, the room frost
protection function, the underfloor heating screed dryout function, and the water
pipe antifreeze function will remain active even if the user does NOT confirm
emergency operation.
Compressor forced off
Compressor forced off mode can be activated to only allow the backup
heater to provide space heating. When this mode is activated:
▪ Heat pump operation is NOT possible
▪ Cooling is NOT possible
# Code
[9.5.2] [7-06]
Glycol Filled system
This setting gives the installer the possibility to indicate whether the system is filled
with glycol or water. This is important in case glycol is used to protect the water
circuit against freezing. If NOT set correctly, the liquid in the piping can freeze.
# Code
N/A [E-0D]
NOTICE
If you add glycol to the water, you also need to install a flow switch (EKFLSW2).
Only relevant for installations with water piping outdoors. This function tries to
protect outdoor water piping from freezing.
NOTICE
If the system does NOT contain a backup heater, then:
▪
Make sure that the room antifrost control is activated ([2-06]=1).
▪
Do NOT change the default room antifrost temperature [2-05].
▪
Make sure that the water pipe freeze prevention is activated ([4-04]≠2).
NOTICE
Water pipe freeze prevention. Even if you turn OFF space heating/cooling operation
([C.2]: Operation > Space heating/cooling), water pipe freeze prevention –if
enabled– will remain active.
Description
Activation of the Compressor forced off
mode:
▪ 0: disabled
▪ 1: enabled
Description
Glycol Filled system: Is the system filled
with glycol?
▪ 0: No
▪ 1: Yes
11 Configuration
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Installer reference guide
165