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RANGE MODE
HOT
50%
45%
LOT
40%
21
C
22
C
23
C
o
o
o
OUTSIDE TEMPERATURE
OutTempLW
Graph 9 Pump speed vs outside temperature (cooling demand at
0%) (according to parameters on Screen G and Screen
H). The higher the OT, the higher the pump speed for
the same cooling demand.
RANGE MODE
HOT
82%
77%
LOT
72%
21
C
22
C
23
C
o
o
o
OUTSIDE TEMPERATURE
OutTempLW
Graph 10 Pump speed vs outside temperature (cooling demand
at 100%) (according to parameters on Screen G and
Screen H). The higher the OT, the higher the pump
speed for the same cooling demand.
MODE SET TO PROP: According to Graph 8 and Graph 9,
if the cooling demand is 0%, the pump speed will be from
40 to 50%. If the outside temperature is 22
pump speed will be 40% (LOT). If the outside temp is 27
or above, the pump speed will be 50% (HOT). If the outside
temperature is anywhere between 22
speed will be proportional within the corresponding 40-50%
range.
As another example, according to Graph 8 and Graph 10, if
the cooling demand is 100%, the pump speed will be from 72
to 82%. If outside temperature is 22
speed will be 72% (LOT). If the outside temperature is 27
or above, the pump speed will be 82% (HOT). If the outside
temperature is within the 22
will be proportional within the corresponding 72-82% range.
10
PROP MODE
24
C
25
C
26
C
27
C
o
o
o
o
OutTempLW + OutTempLW band
PROP MODE
24
C
25
C
26
C
27
C
o
o
o
o
OutTempLW + OutTempLW band
C or below, the
o
C and 27
C, the pump
o
o
C or below, the pump
o
C-27
C range, the pump speed
o
o
MODE SET TO RANGE: According to Graph 8 and Graph 9,
if the cooling demand is 0%, the pump speed will be either
40 or 50%. If the outside temperature is 22
pump speed will be 40% (LOT). If the outside temperature
is 27
C or above, the pump speed will be 50% (HOT). If OT
o
rises and passes 22
o
If OT drops and passes 27
50%.
According to Graph 8 and Graph 10, if the cooling demand
is 100%, the pump speed will be either 72 or 82%. If the
outside temperature is 22
be 72% (LOT). If the outside temperature is 27
the pump speed will be 82% (HOT). If OT rises and passes
22
C, the pump speed remains at 72%. If OT drops and
o
passes 27
C, the pump speed remains at 82%.
o
ACCELERATION ON START:
Except when pipes are drained, the pump will always start
at its minimum speed. It will then gradually increase to the
speed defined by the cooling demand. The acceleration
ramp can be set using this parameter. Only for Modulating
Pump (MP).
If the pipes are drained, the pump starts at full speed to fill the
pipes. Then, pump speed drops to minimum and gradually
increases to the speed defined by the cooling demand.
C
o
C
o
C or below, the
o
C, the pump speed remains at 40%.
C, the pump speed remains at
o
C or below, the pump speed will
o
o
C or above,
R
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