Wilo-TOP-E / TOP-ED / TOP-EV - NRF

– The control systems which can be selected are:
– ∆p-c: The electronics keeps the differential pressure
produced by the pump constant at the differential
pressure set value H S up to the maximum
characteristic curve (Fig. 3).
– ∆p-v: The electronics increases the pump’s
differential pressure set value in a straight line
between H S and 1/2 H S. The differential pressure
set value H increases or decreases in accordance
with the transporting capacity (Fig. 4).
– ∆p-T: The electronics alters the pump’s differential
pressure set value in accordance with the
measured temperature of the medium. This
control system can only be programmed via the
IR monitor (Fig. 5). Only two settings are possible:
– Positive control: The differential pressure is
increased in a straight line between H Smin and
H Smax. as the temperature increases. (Set at the
IR monitor: H Smax. > H Smin).
Can be used, for example, in standard boilers
with a sliding flow temperature.
– Negative control: The differential pressure is
decreased in a straight line between H Smin and
H Smax. as the temperature increases (Set at the
IR monitor: H Smax. < H Smin).
Can be used, for example, in condensing boilers
for which certain minimum condenser
temperatures have to be respected in order to
obtain the optimum degree of heating from the
heating medium. In this case the pump must
be fitted in the return of the installation.
– Regulator mode: The speed of the pump is
kept at a constant level between n min and n max.
(Fig. 6). The regulator mode control system
deactivates the module control.
– With the “auto” control system, the pump is
capable of recognising the minimum requirement
for heat produced by the system by a spontaneous
drop in the temperature of the flow medium and
then of switching to light load mode (light load
curve). The control system is automatically changed
back again should more heating be required.
– The pumps are fitted with an electronic overload
protection system which switches the pump off
should it become overloaded.
– The modules are fitted with a memory to collect and
store data. What this means is that data is stored,
even during long periods of down time. Once power
has been restored, the pump runs again at the same
ENGLISH
values at which it was running prior to the power
cut.
– The module rating plate is to be found in the terminal
box. It contains all data necessary for the
scheduling the unit.
– Pump kick: Pumps switched off using the on/off
switch, the PLR (pump control processor), IR monitor,
or Ext. off start up once every 24 hours for a
short period of time in order to avoid blockages
resulting from long down times.
Should it be foreseen that the power supply will be
switched off for a long period of time, the pump kick
should be taken over by the heating control/boiler
system. In order to do this the pump must be
plugged in (Display → on).
– External Off: (only pumps with P 1max ≥ 500 W, see
rating plate)
The pump can be switched on/off via the external
potential-free contact. Units which are switched on
and off frequently (>20 times a day) can be switched
on and off via “Ext. Off”.
– 0…10 V-input: (only pumps with P 1max ≥ 500 W,
see rating plate)
When the unit is in regulator mode the speed can
be set via an external voltage signal (0…10 V). The
frequency and thus the speed follows the voltage in
accordance with Fig. 6, input resistance: R i ≥ 10 kΩ.
– +24 V output: (only pumps with P1 ≥ 500 W, see
rating plate)
constant-voltage for an external consumer/transmitter.
The +24 V may be loaded with max.
50 mA. The voltage is short circuit-proof.
4.2 Double pump mode
Both pumps are controlled by the master.
Pump fault: The other pump operates according to
the standard control of the master.
– IF(Interface) module: An IF module is necessary for
the communication between the master and slave
pumps, as well as the pump and the PLR (pump
control processor) or interface converter. This module
is fitted on a multiple plug positioned between the
two pumps in the terminal box (Fig. 2). It is available
as an accessory.
– Peak load mode: At partial load, the hydraulic
capacity is provided by one pump only. The second
pump is optimised in terms of efficiency when the
sum of the power requirements P 1 of both pumps
in the partial load range is lower than the power
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