York Geysir User Manual page 16

Temperature, input brine
pipe
Set value for
DEFR CURVE
[value OUTDOOR STOP]
Figure 12: Graph that shows how the value for DEFR CURVE 0 can be set .
The value for OUTDOOR STOP that is set means that outdoor unit is no longer used for hea-
ting or hot water production if the outdoor temperature is the same as or lower than the value.
Heating and hot water production then occurs with the help of the auxiliary heater.
The value for DEFR CURVE 0 is the temperature that the input brine return has when a
defrost must start at outdoor temperature 0°C.
In the corresponding way the value for DEFR CURVE [value OUTDOOR STOP] is the
temperature that the incoming brine return has when a defrost should start at the set outdoor
temperature for OUTDOOR STOP.
AT the outdoor temperature for
OUTDOOR STOP, the adjustable
range for
DEFR CURVE [value UTESTOPP]
is -1°C to -8°C lower than
OUTDOOR STOP
Figure 13: Graph that shows how the value for DEFR CURVE [OUTDOOR STOP] can be set .
These three settings together create the defrosting curve and all three values have an effect
on when the defrosting will start.
16
ENGLISH
Set value for OUTDOOR STOP
Temperature, input brine
pipe
Adjustable interval for incoming brine
temperature at 0°C outdoor tempera-
ture is -5°C to -15°C
Outdoor temperature
Set value for OUTDOOR STOP
Set value for
DEFR CURVE 0
Outdoor temperature