Adjusting The Pump Output; Setting The Control Mode - salmson LRE Serie Instalacion Y Puesta En Servicio

9.3

Adjusting the pump output

9.4

Setting the control mode

H
H
max
H
1
s
s
H
2
s
H
min
H
H
H
max
H
1
s
H
2
s
H
min
Fig. 40: p-c/ p-v control
H
H
n
max
H
s
s
n
min
Fig. 41: Manual control mode
Installation and operating instructions LRE, JRE
• The system was designed for a certain duty point (full load point, cal-
culated maximum heating capacity load). During commissioning, the
pump output (delivery head) is to be set according to the duty point
of the system.
• The factory setting does not correspond to the output required for
the system. It is determined with the help of the pump curve diagram
for the selected pump type (e.g. from data sheet).
NOTE:
The flow value shown on the IR-Monitor/IR-Stick display or output to
the building management system must not be used to control the
pump. This value is merely an indicator of general trends.
A flow value is not output on every type of pump.
CAUTION! Risk of property damage!
An inadequate volume flow can lead to damage on the mechanical
shaft seal; the minimum volume flow depends on the rotation
speed of the pump.
• Make sure that the volume flow does not fall below the minimum
value Q
min
Calculation of Q
Q = 10% x Q
min
p-c/ p-v control:
Setting (Fig. 40)
1 Duty point on
maximum pump
curve
Q
2 Duty point
within the con-
trol range
Setting range
Q
Q
NOTE:
Alternatively, manual control mode (Fig. 41) or PID operating mode
can also be set.
Manual control mode:
"Manual control" mode deactivates all other control modes. The
speed of the pump is kept to a constant value and set using the rotary
knob.
The speed range is dependent on the motor and pump type.
PID control:
Q
Q
The PID controller in the pump is a standard PID controller, as
described in control technology literature. The controller compares a
measured process value to a predefined setpoint and attempts to
adjust the process value to match the setpoint as closely as possible.
.
:
min
Actual speed
x
max pump
max. speed
p-c
Starting at the duty
point, draw towards the
left. Read off setpoint
H and set the pump to
S
this value.
Starting at the duty
point, draw towards the
left. Read off setpoint
H and set the pump to
S
this value.
H , H
min max
See pump curves
(e.g. on data sheet)
English
p-v
Starting at the duty
point, draw towards the
left. Read off setpoint
H and set the pump to
S
this value.
Move to max. pump
curve along control
curve, then horizontally
to the left, read off set-
point H and set the
S
pump to this value.
H , H
min max
See pump curves
(e.g. on data sheet)
97