Temperature Influence; Indicator Lights - Grundfos UPED 50-12 Montage- Und Betriebsanleitung

6.6 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.
H
100%
H
actual
30%
20 50 80
T
actual
Fig. 11
In the above example, T
max.
selected. The actual liquid temperature T
causes the setpoint for head to be reduced from
100% to H .
actual
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 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
• systems with almost constant flows (e.g. one-pipe
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.
Selection of T
max.
In systems with a dimensioned flow-pipe tempera-
ture of:
• up to and including 55°C, select T
• above 55°C, select T
max.
. The set-
max.
H
T °C Q
= 80°C has been
actual
= 50°C,
max.
= 80°C.

6.7 Indicator lights

The two indicator lights are used for fault and operat-
ing indication.
For position on pump, see fig. 13, section 7.2 Control
panel.
Master pump indicator lights:
The functions of the master pump indicator lights
apply to both the master pump and the slave pump.
A fault in the slave pump will thus be indicated on the
master pump.
Slave pump indicator lights:
The green indicator light on the slave pump will flash
on and off 20 times per minute to indicate correct
communication with the master pump.
The indicator lights of the slave pump can be acti-
vated briefly by pressing a button on the slave pump
control panel. Fault indication will then only apply to
the slave pump.
Note: When the R100 remote control communicates
with the master pump, the red indicator light will flash
rapidly.
Functions of indicator lights:
Indicator lights
Fault Opera- Description
tion
(red) (green)
The electricity supply has
Off Off
been switched off.
Perma-
Off The pump is operating.
nently on
The pump has been set to
Off Flashing
stop.
The pump has stopped be-
cause of a fault. Restarting
Perma- will be attempted. (It may
Off
nently on be necessary to restart the
pump manually by resetting
the fault indication.)
The pump is operating, but
it has been stopped be-
cause of a fault.
Note: If there is no differ-
Perma- Perma-
ential pressure or tempera-
nently on nently on
ture sensor signal, the
pump will continue operat-
ing according to the max.
curve.
The pump has been set to
Perma-
Flashing stop, but it has been
nently on
stopped because of a fault.
See also section 8. Fault finding chart.
133