Grundfos TPE2 - Limit-Exceeded Function

Selecting the maximum temperature
In systems with a dimensioned flow-pipe temperature
of:
• up to and including 55 °C, select T
max.
equal to 50
°C
• above 55 °C, select T
max.
equal to 80 °C.
You cannot use the temperature influence function in
air-conditioning and cooling systems.
Factory setting
See section Factory settings.
Related information
35. Factory settings
17.22 Limit-exceeded function
Pump variant Limit-exceeded function
TPE3, TPE3 D ●
TPE2, TPE2 D ●
This function can monitor a measured parameter or
one of the internal values such as speed, motor load
or motor current. If a set limit is reached, a selected
action can take place. You can set two limit-exceeded
functions meaning that you can monitor two
parameters or two limits of the same parameter
simultaneously.
The function requires setting of the following:
Measured
Here you set the measured parameter to be
monitored.
Limit
Here you set the limit which activates the function.
Hysteresis band
Here you set the hysteresis band.
Limit exceeded when
Here you can set if you want the function to be
activated when the selected parameter exceeds or
drops below the set limit.
• Above limit
The function is activated if the measured
parameter exceeds the set limit.
• Below limit
The function is activated if the measured
parameter drops below the set limit.
Action
If the value exceeds a limit, you can define an action.
You can select the following actions:
• No action
The pump remains in its current state. Use this
setting if you only want to have a relay output
when the limit is reached. See section Signal
relays 1 and 2 (Relay outputs).
• Warning/alarm
There is a warning.
• Stop
The pump stops.
• Min.
The pump reduces speed to minimum.
• Max.
The pump increases speed to maximum.
• User-defined speed
The pumps run at a speed set by the user.
Detection delay
You can set a detection delay which ensures that the
monitored parameter stays above or below a set limit
in a set time before the function is activated.
Resetting delay
The resetting delay is the time from which the
measured parameter differs from the set limit
including the set hysteresis band and until the
function is reset.
67
English (GB)