Grundfos TPE 2 Series User Manual

English (GB)
28
14.5 Control mode
Possible control modes:
•AUTO
ADAPT
•FLOW
ADAPT
• Prop. pressure (proportional pressure)
• Const. pressure (constant pressure)
• Const. temp. (constant temperature)
• Con. diff. press. (constant differential pressure)
• Con. diff. temp. (constant differential temperature)
• Const. flow rate (constant flow rate)
• Const. level (constant level)
• Const. other val. (constant other value)
• Const. curve (constant curve).
You can change the setpoint for all control modes, except
AUTO
ADAPT
and FLOW
ADAPT
, in the "Setpoint" submenu under
"Settings" when you have selected the desired control mode.
Factory setting
See section 31. Factory settings.
14.5.1 AUTO
ADAPT
The AUTO
ADAPT
control mode continuously adapts the pump
performance according to the actual system characteristic.
Fig. 36 AUTO
ADAPT
When the AUTO
ADAPT
control mode has been enabled, the pump
will start with the factory setting, H
fac
= H
set1
, and then adjust its
performance to A
1
. See fig. 36.
When the pump registers a lower head on the maximum curve,
A
2
, the AUTO
ADAPT
function will automatically select a
correspondingly lower control curve, H
set2
. If the valves in the
system close, the pump will adjust its performance to A
3
.
The AUTO
ADAPT
control mode is a form of proportional-pressure
control where the control curves have a fixed origin, H
auto_min
.
The AUTO
ADAPT
control mode has been developed specifically
for heating systems and is not recommended for air-conditioning
and cooling systems.
14.5.2 FLOW
ADAPT
When FLOW
ADAPT
is selected, the pump will run AUTO
ADAPT
and
ensure that the flow never exceeds the entered FLOW
LIMIT
value.
The setting range for FLOW
LIMIT
is 25 to 90 %, of the maximum
flow rate of the pump.
The factory setting of the FLOW
LIMIT
is the flow rate where the
AUTO
ADAPT
factory setting meets the maximum curve. See fig.
37.
Fig. 37 FLOW
ADAPT
Note
The operating mode must be set to "Normal" before a
control mode can be enabled.
Pump variant AUTO
ADAPT
TPE3, TPE3 D 
TPE2,TPE2 D -
Note
Manual setting of the setpoint is not possible.
TM05 7910 1613
H
Q
H
auto_min
H
fac
A
1
A
3
A
2
H
set1
H
set2
A
1
: Original duty point.
A
2
: Lower registered head on the maximum curve.
A
3
: New duty point after AUTO
ADAPT
control.
H
set1
: Original setpoint setting.
H
set2
: New setpoint after AUTO
ADAPT
control.
H
fac.
: Factory setting.
H
auto_min
: A fixed value of 1.5 m.
Pump variant FLOW
ADAPT
TPE3, TPE3 D 
TPE2, TPE2 D -
Note
Do not set the FLOW
LIMIT
lower than the sized duty
point.
TM05 7912 1613
H
Q
Q
max
25 %
90 %
H
auto_min
H
fac
Q
fac
Setting range

Grundfos TPE 2 Series Specifications

General

Enclosure Class	IP55
Frequency	50/60 Hz
Protection Class	IP55
Pump Type	Centrifugal
Pressure Rating	10 bar
Material	Stainless Steel
Operating Pressure	10 bar
Control Mode	Variable Speed
Communication	Modbus
Impeller Type	Closed Impeller