Grundfos TPE 1000 Serie Instrucciones De Instalación Y Funcionamiento página 19

11.4.4 Constant differential temperature
The pump maintains a constant differential temperature in the
system and the pump performance is controlled according to this.
See fig. 27.
H
Fig. 27 Constant differential temperature
This control mode requires either two external temperature
sensors or one external differential-temperature sensor as shown
in the examples below:
Examples
• Two external temperature sensors.
t
t
t
• One external differential-temperature sensor.
t
Fig. 28 Constant differential temperature
△t
Q
11.4.5 Constant flow rate
The pump maintains a constant flow in the system, independently
of the head. See fig. 29.
H
Fig. 29 Constant flow rate
This control mode requires an external flow sensor as shown in
the example below:
Example
• One external flow sensor.
Q
Fig. 30 Constant flow rate
11.4.6 Constant level
The pump maintains a constant level, independently of the flow
rate. See fig. 31.
H
Fig. 31 Constant level
This control mode requires an external level sensor.
The pump can control the level in a tank in two ways:
• as an emptying function where the pump draws the liquid from
the tank.
• as a filling function where the pump pumps the liquid into the
tank.
See fig. 32.
The type of level control function depends on the setting of the
built-in controller. See section 11.11
Q
Q
set
Q
Controller settings
.
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