Grundfos TPE2 Installation And Operating Instructions Manual page 34

16.6.1 "AUTO "
ADAPT
Pump variant
TPE3, TPE3 D
TPE2, TPE2 D
The AUTO control mode continuously adapts
ADAPT
the pump performance according to the actual
system characteristic.
Manual setting of the setpoint is not possible.
H
H
fac
A
1
H
auto_min
A
Fig. 37 AUTO
ADAPT
When the AUTO control mode has been
ADAPT
enabled, the pump will start with the factory setting,
H is equal to H , and then adjust its
fac set1
performance to A . See fig. 37.
1
When the pump registers a lower head on the
maximum curve, A , the AUTO
2
automatically selects a correspondingly lower control
curve, H . If the valves in the system close, the
set2
pump will adjust its performance to A
A : Original duty point.
1
Lower registered head on the maximum
A :
2
curve.
New duty point after AUTO
A :
3
control.
H : Original setpoint setting.
set1
H : New setpoint after AUTO
set2
H : Factory setting.
fac.
H : A fixed value of 1.5 m.
auto_min
The AUTO control mode is a form of
ADAPT
proportional-pressure control where the control
curves have a fixed origin, H
The AUTO control mode is developed
ADAPT
specifically for heating systems and we do not
recommend that you use it for air-conditioning and
cooling systems.
34
"AUTO "
ADAPT
●
-
H
set1
H
set2
3 A
2
Q
function
ADAPT
.
3
ADAPT
control.
ADAPT
.
auto_min
16.6.2 "FLOW "
ADAPT
Pump variant
TPE3, TPE3 D
TPE2, TPE2 D
When you select FLOW
ADAPT
AUTO and ensures that the flow never
ADAPT
exceeds the entered FLOW
The setting range for FLOW
maximum flow rate of the pump.
The factory setting of the FLOW
where the AUTO factory setting meets the
ADAPT
maximum curve. See fig. 38.
Do not set the FLOW
LIMIT
point.
H 25 %
Setting range
H
fac
H
auto_min
Fig. 38 FLOW
ADAPT
"FLOW "
ADAPT
●
-
, the pump runs
value.
LIMIT
is 25 to 90 %, of the
LIMIT
is the flow rate
LIMIT
lower than the sized duty
90 % Q
max
Q
Q
fac