Grundfos TPE2 Notice D'installation Et De Fonctionnement page 36

17.6.8 "Constant flow rate"
Pump variant
TPE3,TPE3 D
TPE2,TPE2 D
The pump maintains a constant flow in the system, independently
of the head. See fig. 47.
H
Fig. 47 "Constant flow rate"
This control mode requires an external flow sensor. See the
example below.
Example
• One external flow sensor.
Q
Fig. 48 "Constant flow rate"
Controller settings
For recommended controller settings, see section
17.18 "Controller"("Controller settings").
17.6.9 "Constant level"
Pump variant
TPE3,TPE3 D
TPE2,TPE2 D
The pump maintains a constant level, independently of the flow
rate. See fig. 49.
H
Fig. 49 "Constant level"
36
"Constant flow rate"
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●
Q
Q
set
"Constant level"
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●
Q
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. 50.
The type of level control function depends on the setting of the
built-in controller. See section 17.18 "Controller"("Controller
settings").
Examples
• One external level sensor.
– emptying function.
L
• One external level sensor.
– filling function.
L
Fig. 50 "Constant level"
Controller settings
For recommended controller settings, see section
17.18 "Controller"("Controller settings").