Gebwell GEMINI 40, Installation, Operation And Maintenance Manual

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If the domestic hot water temperature is lower than the current
set point by the switching differential set here, the domestic hot
water charging will be activated.
The domestic hot water charging shall end, when the tempera-
ture reaches the set point.
Example: The domestic hot water’s charging is activated when
the domestic hot water’s measurement sensor BR is under the
nominal set point (1610) 55°C – switching differential (5024)
5°C.

By increasing the Switching differential set point, the
compressor runs for a longer time to prepare the do-
mestic hot water.

By reducing the set point, the compressor runs for a
shorter time
12.7 Domestic hot water circulation pump
A time program can be defined for DHW circulation pump or
the pump can follow the time program 4 set on domestic hot wa-
ter. If you want to use these functions, the circulation pump is to
be connected to the control automation.
RELEASING THE HOT WATER CIRCULATION
PUMP
With this setting you can define the function of hot water circu-
lation pump
Menu: Expert → Parameter list
Domestic hot water → 5/6 → 1660
Factory setting: DHW release
Domestic hot water release
The circulation pump runs when DHW heating is released.
Time program 4 / DHW
The circulation pump follows the time program 4. In this case,
the circulation pump is switched on (ON) when time program is
released and off (OFF) when the time program is not released.
12.8 Cooling circuit
Use of the cooling circuit requires the Control extension for
cooling circuit (JPLPO1A) extension module sold as an acces-
sory. The heat pump can control three cooling circuits.
The site-specific definition of cooling circuits is done in Expert-
level. A circuit-specific definition must be made for each circuit.
The cooling circuits coming into use must be switched on the
Configuration - menu of the controller. When the switch is com-
plete, the connection of the flow sensor to the controller will ac-
tivate the cooling circuit.
When the cooling operation is released, a bar will appear under
the symbol on the display. The cooling operation is selected by
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