Grundfos TPE 2 Series User Manual

English (GB)
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14.5.3 Proportional pressure
The head of the pump is reduced at decreasing water demand
and increased at rising water demand. See fig. 38.
This control mode is especially suitable in systems with relatively
large pressure losses in the distribution pipes. The head of the
pump will increase proportionally to the flow in the system to
compensate for the large pressure losses in the distribution
pipes.
The setpoint can be set with an accuracy of 0.1 metre. The head
against a closed valve is half the setpoint.
Fig. 38 Proportional pressure
Fig. 39 Proportional pressure
Controller settings
For recommended controller settings, see section
14.15 Controller (Controller settings).
14.5.4 Constant pressure
We recommend this control mode if the pump is to deliver a
constant pressure, independently of the flow in the system. See
fig. 40.
Fig. 40 Constant pressure
This control mode requires an external differential-pressure
sensor as shown in the examples below. You can set the pressure
sensor in the "Assist" menu. See section 14.44 Assisted pump
setup.
Fig. 41 Constant pressure
Controller settings
For recommended controller settings, see section
14.15 Controller (Controller settings).
Pump variant Proportional pressure
TPE3, TPE3 D 
TPE2, TPE2 D -
TM05 7909 1613
Example
• Factory-fitted differential-pressure sensor.
H
Q
Hset
Hset
2
p
Pump variant Constant pressure
TPE3, TPE3 D -
TPE2, TPE2 D 
TM05 7901 1613
Examples
• One external differential-pressure sensor.
H
Q
p
p

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