Description Of Functions; Heat Energy Monitor; Setpoint; Operating Mode - Grundfos TPE2 D Manual Del Usuario

17. Description of functions

17.1 "Heat energy monitor"

Pump variant
TPE3, TPE3 D
TPE2, TPE2 D
The heat energy monitor is a monitoring function that calculates
the heat energy consumption within a system. The built-in flow
estimation needed for the calculation has an inaccuracy of ± 10 %
of the maximum flow in the area down to 10 % flow and down to
12.5 % of the maximum head. The calculations are based on
water at a temperature of 68 °F (20 °C). Also, the temperature
measurements needed for the calculation have some inaccuracy
depending on the sensor type. Therefore, you cannot use the
heat energy value for billing purposes. However, the value is
perfect for optimization purposes in order to prevent excessive
energy costs caused by system imbalances.
The heat energy monitor requires an additional temperature
sensor installed in the flow pipe or return pipe depending on
where the pump is installed.
Use the analog inputs and/or Pt100/1000 inputs for
measuring the temperatures used for calculation by
the heat energy monitor.
The used inputs must not be set to Not active and
one of the measuring parameters must be set to
Temperature 2.
t : Flow-pipe temperature
F
t : Return-pipe temperature
R
Fig. 33 Example: pump installed in the flow pipe and
additional temperature sensor installed in the return
pipe

17.2 Setpoint

Pump variant
TPE3, TPE3 D
TPE2, TPE2 D
You can set the setpoint for all control modes, except AUTO
and FLOW , in this submenu when you have selected the
ADAPT
desired control mode. See section
Factory setting
See section 35. Factory settings.
"Heat energy monitor"
●
-
kWh
t
F
t
R

Setpoint

●
●
ADAPT
17.6 Control mode.

17.3 Operating mode

Pump variant
TPE3, TPE3 D
TPE2, TPE2 D
Possible operating modes:
• Normal
The pump runs according to the selected control mode.
• Stop
The pump stops.
• Min.
Use the minimum-curve mode in periods in which a minimum
flow is required.
This operating mode is for instance suitable for manual night
setback if you do not want to use the automatic night setback..
• Max.
Use the maximum-curve mode in periods in which a maximum
flow is required.
This operating mode is for instance suitable for systems with
hot-water priority.
• Manual
The pump is operating at a manually set speed. In Manual the
setpoint via bus is overruled. See section
user-defined speed".
• "User-defined speed"
The motor is operating at a speed set by the user. See section
17.5 "Set user-defined speed".
All operating modes are illustrated in the figure below.
H H
Normal
Normal
Min.
Stop
Fig. 34 Operating modes
Factory setting
See section 35. Factory settings.

Operating mode

●
●
17.5 "Set
Max.
Manual
Q Q
31