11 | Configuration
Installer reference guide
166
EWAA011~016DA + EWYA009~016DA
Packaged air-cooled water chillers
and packaged air to water heat pumps
4P620242-1 – 2020.06
▪ When Emergency is set to auto SH reduced/DHW off (or auto SH
reduced/DHW on)
(1)
and a heat pump failure occurs, space heating is reduced.
Similarly as in Manual mode, the unit can take the full load with the backup
heater if the user activates this via the Malfunctioning main menu screen.
To keep energy consumption low, we recommend to set Emergency to auto SH
reduced/DHW off if the house is unattended for longer periods.
# Code Description
[9.5.1] [4-06] ▪ 0: Manual
▪ 1: Automatic
▪ 2: auto SH reduced/DHW on
Do NOT use.
(a)
▪ 3: auto SH reduced/DHW off
▪ 4: auto SH normal/DHW off
Do NOT use.
(a)
(a)
These settings are not needed because there is no domestic hot water.
INFORMATION
The auto emergency setting can be set in the menu structure of the user interface
only.
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.
HP forced off
HP forced off mode can be activated to allow the backup heater to provide
space heating. When this mode is activated:
▪ Heat pump operation is NOT possible
▪ Cooling is NOT possible
# Code Description
[9.5.2] [7-06] Activation of the HP forced off mode:
▪ 0: disabled
▪ 1: enabled
Glycol filled system
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.
(1)
auto SH reduced/DHW on has the same effect as auto SH reduced/DHW off, but should NOT be used because
there is no domestic hot water.
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