Proportional-Pressure Setup; Flow Limit - Grundfos TPE2 D Manual Del Usuario

17.6.10 "Constant other value"
Pump variant
TPE3,TPE3 D
TPE2,TPE2 D
Any other value is kept constant.
Use this control mode if you want to control a value which is not
available in the Control mode menu. Connect a sensor measuring
the controlled value to one of the analog inputs of the pump. The
controlled value will be shown in percentage of sensor range.
17.6.11 "Constant curve"
Pump variant
TPE3,TPE3 D
TPE2,TPE2 D
You can set the pump to operate according to a constant curve,
like an uncontrolled pump. See fig. 51.
You can set the desired speed in % of maximum speed in the
range from 13 to 100 %.
H
Fig. 51 "Constant curve"
Depending on the system characteristic and the duty point, the
100 % setting may be slightly smaller than the actual maximum
curve of the pump even though the display shows 100 %. This is
due to the power limitations built into the pump. The deviation
varies according to pump type and pressure loss in the pipes.
H [%]
100 %
Fig. 52 Power limitations influencing the maximum curve
Controller settings
For recommended controller settings, see section
17.18 "Controller"("Controller settings").
"Constant other value"
●
●
"Constant curve"
●
●
Q
Limited max. curve
80 % Q

17.7 "Proportional-pressure setup"

Pump variant "Proportional-pressure setup"
TPE3, TPE3 D
TPE2, TPE2 D
"Control-curve function"
You can set the curve either to quadratic or linear.
"Zero-flow head"
You can set this value in % of the setpoint. With a setting of 100
%, the control mode is equal to constant differential pressure.
17.8 FLOW
LIMIT
Pump variant
TPE3, TPE3 D
TPE2, TPE2 D
FLOW
LIMIT
• Enable FLOW function.
LIMIT
• Set FLOW .
LIMIT
H 25 %
Setting range
Q
limit
Fig. 53 FLOW
LIMIT
You can combine the FLOW
LIMIT
control modes:
• Prop. press.
• Con. diff. press.
• Con. diff. temp.
• Const. temp.
• Const. curve.
A flow-limiting function ensures that the flow never exceeds the
entered FLOW value.
LIMIT
The setting range for FLOW
LIMIT
pump.
The factory setting of the FLOW
AUTO factory setting meets the maximum curve.
ADAPT
See fig. 36.
Factory setting
See section 35. Factory settings
●
-
FLOW
LIMIT
●
-
Q
90 %
max
Q
Q
max
function with the following
is 25 to 90 % of the Q of the
max
is the flow where the
LIMIT
37