5 Operation
Operation manual
10
EWAA011~016DA + EWYA009~016DA
Packaged air-cooled water chillers
and packaged air to water heat pumps
4P620244-1C – 2023.11
5.4 Turning operation ON or OFF
5.4.1 Visual indication
Certain functionalities of the unit can be enabled or disabled
separately. If a functionality is disabled, the corresponding
temperature icon in the home screen will be greyed out.
Space heating/cooling operation
a Space heating/cooling operation ON
b Space heating/cooling operation OFF
5.4.2 To turn ON or OFF
Space heating/cooling operation
NOTICE
Room frost protection. Even if you turn OFF space
heating/cooling operation ([C.2]: Operation > Space
heating/cooling), room frost protection operation –if
enabled– can still activate. However, for leaving water
temperature control and external room thermostat control,
the protection is NOT guaranteed.
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.
1 Go to [C.2]: Operation > Space heating/cooling.
Operation
Space heating/cooling
On
C.2
2 Set operation to On or Off.
5.5 Reading out information
To read out information
1 Go to [8]: Information.
Possible read-out information
In menu… You can read out…
[8.1] Energy data Produced energy, consumed
electricity, and consumed gas
[8.2] Malfunction history Malfunction history
[8.3] Dealer information Contact/helpdesk number
[8.4] Sensors Room temperature, outside
temperature, leaving water
temperature,…
[8.5] Actuators Status/mode of each actuator
Example: Unit pump ON/OFF
In menu… You can read out…
[8.6] Operation modes Current operation mode
Example: Defrost/oil return
mode
[8.7] About Version information about the
system
[8.8] Connection status Information about the connection
status of the unit, the room
thermostat and WLAN.
[8.9] Running hours Running hours of specific system
components
5.6 Space heating/cooling control
5.6.1 Setting the space operation mode
About space operation modes
Your unit can be a cooling or a heating/cooling model:
▪ If your unit is a cooling model, it can cool down a space.
▪ If your unit is a heating/cooling model, it can both heat up and cool
down a space. You have to tell the system which operation mode
to use.
To tell the system which space operation to use, you can:
You can… Location
Check which space operation mode is
currently used.
Home screen
Set the space operation mode permanently. Main menu
Restrict automatic changeover according to
a monthly schedule.
About space operation modes
Your unit can be a cooling or a heating/cooling model:
▪ If your unit is a cooling model, it can cool down a space.
▪ If your unit is a heating/cooling model, it can both heat up and cool
down a space. You have to tell the system which operation mode
to use.
To tell the system which space operation to use, you can:
You can… Location
Check which space operation mode is
currently used.
Home screen
Set the space operation mode permanently. Main menu
Restrict automatic changeover according to
a monthly schedule.
To set the space operation mode
1 Go to [4.1]: Space heating/cooling > Operation
mode
2 Select one of the following options:
▪ Heating: Only heating mode
▪ Cooling: Only cooling mode
▪ Automatic: The operation mode changes
automatically between heating and cooling based
on the outdoor temperature. Restricted per month
according to the Operation mode schedule
[4.2].
To restrict automatic changeover according to a schedule
Conditions: You set the space operation mode to Automatic.
1 Go to [4.2]: Space heating/cooling > Operation
mode schedule.
2 Select a month.
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