Settings
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> Operation alternative heat carrier pump G2
B Select if heat carrier pump G2 should run
continuously or start automatically when the
compressor starts.
In systems without bypass or without a buffer tank,
G2 must be in continuous operation.
The setting applies to G2 of all heat pumps. In
automatic operation, G2 starts for heat pump 2 when
compressor 2 starts.
> Operation alternative collector circuit pump G3
B Select if collector circuit pump G3 should run
simultaneously with the compressor or continuously.
Continuous operation is suitable if external cooling
control exists.
The setting applies to G3 of all heat pumps. In
automatic operation, G3 starts for heat pump 2 when
compressor 2 starts.
G3 stops in the event of low pressure in the collector
circuit. This function requires the installation of a
pressure switch to the collector circuit and its
connection to the external input ( Chapter 16.5).
16.6.9 Screed drying
The screed drying function is used to expel humidity
from the floor tiles in newly-built houses. The drying
program has the highest priority, i.e., all other functions
than security functions and additional heat only are
disabled. All circuits contribute to the drying.
Screed drying takes place in three phases:
• Heating phase
• Phase with maximum temperature
• Cooling phase
Heating and cooling are performed stepwise; each step
continues for at least a day. The phase with maximum
temperature is considered to be one step. There are 9
steps with the factory values: Heating phase in 4 steps
(25 °C, 30 °C, 35 °C, 40 °C), maximum temperature
(45 °C for four days), cooling phase in 4 steps (40 °C,
35 °C, 30 °C, 25 °C).
It is possible to cancel a running program. On
completion of the program, the heat pump returns to
normal operation.
> Activate
B Select Yes if drying should be performed.
Current program step and Remaining time for current
step are displayed. It is possible to change the program
step.
Factory setting Automatic
Alternative Continuous/Automatic
Tab. 143 G2
Factory setting Automatic
Alternative Continuous/Automatic
Tab. 144 G3
The heat pump alone can not produce
enough heating for screed drying. We
recommend using building drying
equipment.
Screed drying requires the installation of
underfloor heating coils under the floor
tiles.
Screed drying requires an electrical
installation without EVU.
EVU means a special electrical connection
used primarily in countries like Germany and
Austria.
Factory setting No
Alternative Yes/No
Tab. 145 Activate screed drying
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