Constant-Curve Duty; Max. Or Min. Curve Duty; Temperature Influence - Grundfos UPE Series 2000 Installation And Operating Instructions Manual

6.4 Constant-curve duty

Can be set via the R100, see section 7. Setting the
pump.
The pump can be set to operate according to a con-
stant curve, like an uncontrolled pump, see fig. 11.
MAGNA UPE/UPED 32-120 and 40-120:
Select one of 10 curves between the max. and min.
curves.
MAGNA UPE/UPED 50-60 and 65-60:
Select one of 5 curves between the max. and min.
curves.
Fig. 11
H
Min.

6.5 Max. or min. curve duty

Can be set by means of the control panel, via the
GENI module or via the R100, see section 7. Setting
the pump.
The pump can be set to operate according to the
max. or min. curve, like an uncontrolled pump, see
fig. 12.
This operating mode is available, irrespective of the
control mode.
Fig. 12
H
H
Min.
The max. curve mode can be selected if an uncon-
trolled pump is required.
The min. curve mode can be used in periods in
which a minimum flow is required. This operating
mode is for instance suitable for manual night-time
duty if automatic night-time duty is not desired.
10

6.6 Temperature influence

Can be set via the R100, see section 7. Setting the
pump.
When this function is activated in proportional or
constant control mode, the setpoint for head will be
reduced according to the liquid temperature. It is
possible to set temperature influence to function at
liquid temperatures below 80°C or below 50°C.
These temperature limits are called T
point is reduced in relation to the head set (= 100%)
according to the characteristics below.
Fig. 13
H
Max.
Q
In the above example, T
lected. The actual liquid temperature T
the setpoint for head to be reduced from 100% to
H
The temperature influence function requires:
• Proportional or constant-pressure control mode.
• The pump must be installed in the flow pipe.
• System with flow-pipe temperature control
Temperature influence is suitable in:
• systems with variable flows (e.g. two-pipe heating
Max.
• systems with almost constant flows (e.g. one-pipe
Q Q
Selection of T
In systems with a dimensioned flow-pipe tempera-
ture of:
• up to and including 55°C, select T
• above 55°C, select T
H H
100%
actual
30%
20 50 80
T °C
T
actual
= 80°C has been se-
max.
.
actual
(e.g. according to outdoor temperature).
systems), in which the activation of the tempera-
ture influence function will ensure a further reduc-
tion of the pump performance in periods with small
heating demands and consequently a reduced
flow-pipe temperature, and
heating systems and underfloor heating systems),
in which variable heating demands cannot be reg-
istered as changes in the head (as is the case
with two-pipe heating systems). In such systems,
the pump performance can only be adjusted by
activating the temperature influence function.
max.
= 80°C.
max.
. The set-
max.
Q
causes
actual
= 50°C,
max.