English (GB)
27
14. Description of functions
14.1 Heat energy meter
The heat energy meter 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 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 optimisation purposes in order to prevent excessive
energy costs caused by system imbalances.
The heat energy meter requires an additional temperature sensor
installed in the flow pipe or return pipe depending on where the
pump is installed.
Fig. 34 Example: Pump installed in the flow pipe and
additional temperature sensor installed in the return
pipe
14.2 Setpoint
You can set the setpoint for all control modes, except AUTO
ADAPT
and FLOW
ADAPT
, in this submenu when you have selected the
desired control mode. See section 14.5 Control mode.
Factory setting
See section 31. Factory settings.
14.3 Operating mode
Possible operating modes:
•Normal
The pump runs according to the selected control mode.
•Stop
The pump stops.
•Min.
The minimum curve mode can be used 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 automatic night setback.
•Max.
The maximum curve mode can be used 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 14.4 Set manual
speed.
All operating modes are illustrated in the figure below.
Fig. 35 Operating modes
Factory setting
See section 31. Factory settings.
14.4 Set manual speed
This menu is only available in the advanced control panel. With
Grundfos GO, you set the speed via the "Setpoint" menu.
You can set the pump speed in % of the maximum speed. When
you have set the operating mode to "Manual", the pump will run
at the set speed.
Factory setting
See section 31. Factory settings.
Pump variant Heat energy meter
TPE3, TPE3 D
TPE2, TPE2 D -
TM06 1182 1814
t
F
: Flow-pipe temperature
t
R
: Return-pipe temperature
TM06 4024 1515
Max.
Min.
Normal
Normal
Manual
Stop
To Next Page
Loading...
Need help?
General
