Constant Temperature - Grundfos TPE 1000 Serie Instrucciones De Instalación Y Funcionamiento

11.4.2 Constant temperature

This control mode ensures a constant temperature.
Constant temperature is a comfort control mode that can be used
in domestic hot-water systems to control the flow to maintain a
constant temperature in the system. See fig. 23. When this
control mode is used, no balancing valves must be installed in the
system.
H
Fig. 23 Constant temperature
This control mode requires an external temperature sensor as
shown in the examples below:
Examples
• One external temperature sensor.
t
Fig. 24 Constant temperature
18
t
Q
t
11.4.3 Constant differential pressure
The pump maintains a constant differential pressure,
independently of the flow in the system. See fig. 25. This control
mode is primarily suitable for systems with relatively small
pressure losses.
H
Fig. 25 Constant differential pressure
This control mode requires either an external differential-pressure
sensor or two external pressure sensors as shown in the
examples below:
Examples
• One external differential-pressure sensor.
p
• Two external pressure sensors.
p
p p
Fig. 26 Constant differential pressure
Q
p
p
p
p