Operating Range - Grundfos TPE 1000 Series Installation And Operating Instructions Manual

"Differential-temperature
control"
t
L2
t
t
t
L2
L2: distance in metres between heat exchanger and
sensor.
"Flow control"
Q
"Constant pressure
control"
p
p
"Level control"
L
L
48
K T
p i
-0.5 10 + 5L2
K T
p i
0.5 0.5
K T
p i
0.5 0.5
0.1 0.5
K T
p i
-2.5 100
2.5 100
Rules of thumb
If the controller is too slow-reacting, increase the
gain.
If the controller is hunting or unstable, dampen the
system by reducing the gain or increasing the integral
time.
Factory setting
See section Factory settings.
Related information
30. Factory settings

13.15 Operating range

Pump variant
TPE, TPED, NBE, NBGE,
NKE, NKGE
TPE, TPED, NBE, NKE
Series 2000
Set the operating range as follows:
• Set the minimum speed within the range from
fixed minimum speed to user-set maximum
speed.
• Set the maximum speed within the range from
user-set minimum speed to fixed maximum
speed.
The range between the user-set minimum and
maximum speeds is the operating range.
Speeds below 25 % may result in noise from the shaft
seal.
100%
67%
24%
13%
0%
Example of minimum and maximum settings
Operating range
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1
2
3
4
5