Gebwell GEMINI Installation, Operation And Maintenance Manual page 38

pressing the cooling operation button. The cooling operation is
not active, when the heating operation's bar is not visible.
Features of cooling operation:
•
Cooling operation according to time program
•
Temperature set point according to "Comf. Set
point, cooling" setting
•
Protection operations active
•
Cooling limit according to outdoor temperature
COMMISSIONING OF COOLING CIRCUITS
The commissioning of the cooling circuits must be carried out at
the Expert –level in Configuration –menu. Set the circuit to "4-
pipe system cooling" mode and install the output water sensor,
which will activate your selection.
Menu: Expert → Parameter list
Configuration → 2/43 → 5711 Cooling circuit 1
Configuration → 3/43 → 5716 Cooling circuit 2
Configuration → 4/43 → 5722 Cooling circuit 3
OPERATING MODE
Menu: Expert → Parameter list
Cooling circuit 1 → 1/11 → 901
Cooling circuit 2 → 1/11 → 1201
Factory setting: Automatic
The operating mode can be determined with the operating mode
button on the room unit, or via the control row mentioned above.
OFF:
The cooling function is off.
Automatic:
In automatic mode the room temperature is adjusted according
to time program between Comfort and Reduced set points.
SET POINTS
Set the set points in the Cooling circuit menu. When the cooling
operation is in use with Automatic mode, the control uses the
Comfort and Reduced set points.
Menu: Expert → Parameter list
Cooling circuit 1 → 1/11 → 902
Cooling circuit 1 → 1/11 → 1202
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Comfort operation set point
During cooling operation, the room temperature is adjusted in
accordance with the comfort operation set point specified here.
The comfort set point for cooling can also be changed using the
knob on the room unit.
Factory setting: 23°C
Reduced set point
The room temperature is controlled during cooling mode
according to the recuced setpoint defined here.
Factory setting: 25°C
COOLING NOMINAL CURVE
The controller utilises outdoor temperature value to define the
output water set point required for cooling curve. The cooling
curve is determined by specifying two fixed points (output set
point at the temperatures of 25°C and 35°C).
Output water set point in outdoor temperature +25°C:
Menu: Expert → Parameter list
Cooling circuit 1 → 2/11 → 908
Cooling circuit 2 → 2/11 → 1208
Output water set point in outdoor temperature +35°C:
Menu: Expert → Parameter list
Cooling circuit 1 → 3/11 → 909
Cooling circuit 2 → 3/11 → 1209
Output water set point/ET 25
This defines the output water temperature required for cooling at
a mixed outdoor temperature of 25°C without taking summer
compensation into account.
Factory setting: 21°C
Output water set point/ET 35
This defines the output water temperature required for cooling at
a mixed outdoor temperature of 35°C without taking summer
compensation into account.
Factory setting: 18°C
℃
℃
Gebwell GEMINI