Dual Pump Function/Y-Pipe Application - salmson IXENS Manuel D'installation Et Mise En Service

H
H
n
max
H
s
s
n
min
Fig. 17: Manual control mode
6.3 Dual pump function/Y-pipe
application
Fig. 18: Example, differential pressure sen-
sor connection
InterFace-Module (IF-Module)
Installation and operating instructions Ixens, Ixens-D, Ixens Bloc
Manual control mode:
The speed of the pump can be kept to a constant speed between n
and n (Fig. 17). "Manual control" mode deactivates all other con-
max
trol modes.
PID control:
If the aforementioned standard control modes cannot be used – e.g.
Q
Q if other sensors are to be used or the distance between the sensors
and the pump is very large – then the PID control (Proportional-
Integral-Differential control) is available.
By selecting a good combination of individual control portions, the
operator can ensure fast reacting, constant control without lasting
setpoint deviations.
The output signal of the selected sensor can take any intermediate
value. The respective actual value reached (sensor signal) will be
shown as a percent (100 % = maximum measurement range of the
sensor) on the status page of the menu.
NOTE:
The displayed percent value only corresponds indirectly to the current
delivery head of the pump(s). It is possible, for example, that the maxi-
mum delivery head has already been reached at a sensor signal < 100%.
For further information about setting the control mode and the asso-
ciated parameters, see chapter 8 "Operation" on page 94 and chapter
9.4 "Setting the control mode" on page 110.
NOTE:
The properties described below are only available if the internal MP
interface (MP = Multi Pump) is used.
• Both pumps are controlled by the master pump.
If one of the pumps malfunctions, the other will run according to the
master's control settings. In case of a total failure of the master, the
slave pump operates at emergency operation speed.
The emergency operation speed can be set in menu <5.6.2.0>
(see chapter 6.3.3 on page 82).
• The master's display will show the status of the double pump. On the
slave display, 'SL' will appear.
• In the example in Fig. 18, the master pump is the left-hand pump in
the direction of flow. Connect the differential pressure sensor to this
pump.
• The measuring points of the differential pressure sensor of the master
pump must be on the suction and pressure side of the double-pump
system in the corresponding collector pipe (Fig. 18).
For communication between pumps and the building management
system, one IF-Module (accessories) is required. This is plugged into
the terminal space (Fig. 1).
• The master-slave communication uses an internal interface (terminal:
MP, Fig. 30).
• Normally for double pumps, only the master pump must be equipped
with an IF-Module.
• For pumps in Y-pipe applications in which the electronic modules are
connected to each other through the internal interface, only the mas-
ter pumps require an IF-Module.
English
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