Max. Or Min. Curve Duty; Constant Curve Duty; Temperature Influence - Grundfos UPE 2000 Series Montage- Und Betriebsanleitung

Read the tables as follows:
• If the maximum head of the existing pump is 6 me-
tres and the pump is running at maximum speed
under normal operating conditions, it is recom-
mended to set the UPE pump to 3 metres and to
select proportional pressure.
• If, however, the existing pump is running at a re-
duced speed, it is recommended to set the pump
to 2 metres and to select constant pressure.

6.3 Max. or min. curve duty

Can be set by means of the control panel or the
R100.
The pump can be set to operate according to the
max. or min. curve, like an uncontrolled pump, see
fig. 7.
Fig. 7
H
Max.
Min.
The max. curve mode can be selected if an uncon-
trolled pump is required. In this operating mode, the
pump will operate independently of an external con-
troller, if installed.
The min. curve mode can be used in periods in
which a minimum flow is required. This operating
mode is suitable for night-time duty.
Two different min. curves can be set by means of the
R100.

6.4 Constant curve duty

Can be set by means of the R100.
The pump can be set to operate according to a con-
stant curve, like an uncontrolled pump. Select one of
19 curves between the max. and min. curves, see
fig. 8.
Fig. 8
H
Min.
10

6.5 Temperature influence

Can be set by means of the R100.
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. 9
100%
H
actual
In the above example, T
lected. The actual liquid temperature T
the setpoint for head to be reduced from 100% to
H
actual
Q
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 (e.g.
according to outdoor temperature).
Temperature influence is suitable in:
• systems with variable flows (e.g. two-pipe heating
systems), in which the activation of the temperature
influence function will ensure a further reduction of
the pump performance in periods with small heating
demands and consequently a reduced flow-pipe
temperature, and
• systems with almost constant flows (e.g. one-pipe
heating systems and underfloor heating systems), in
which variable heating demands cannot be regis-
tered 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 activat-
ing the temperature influence function.
Selection of T
In systems with a dimensioned flow-pipe tempera-
ture of:
Max.
• up to and including 55°C, select T
• above 55°C, select T
Q
H H
30%
20 50 80
T °C
T
actual
= 80°C has been se-
max.
.
max.
= 80°C.
max.
. The set-
max.
Q
causes
actual
= 50°C,
max.