Grundfos TPE3 - Page 29

29
English (US)
15.4.7 Constant differential temperature
The pump maintains a constant differential temperature in the
system and the pump performance is controlled according to this.
See fig. 45.
Fig. 45 Constant differential temperature
This control mode requires either two temperature sensors or one
external differential-temperature sensor as shown in the
examples below:
Fig. 46 Constant differential temperature
15.4.8 Constant flow rate
The pump maintains a constant flow in the system, independently
of the head. See fig. 47.
Fig. 47 Constant flow rate
This control mode requires an external flow sensor as shown
below:
Fig. 48 Constant flow rate
Pump variant Constant differential temperature
TPE3 (D) ●
TPE2 (D) ●
TM05 7954 1713
Examples
• Factory-fitted temperature sensor and an external
temperature sensor (only TPE3 (D)).
• Two external temperature sensors.
• One external differential-temperature sensor.
H
Q
△t
t
t
t
t
t
t
t
Pump variant Constant flow rate
TPE3 (D) -
TPE2 (D) ●
TM05 7955 1713
Example
• One external flow sensor.
H
Q
Q
set
Q