en
62
Installation
Indications,
functions and options
Messages
Commissioning
Operation and function
Heat quantity measurement with fixed flow rate value
The heat quantity balancing (estimation) uses the difference between the flow and
return temperatures and the entered flow rate (at 100 % pump speed).
Î
Read the flow rate (l/min) and adjust it in the FMAX channel.
Î
Adjust the antifreeze type and concentration of the heat transfer fluid in the
channels MEDT and MED%.
Note
Heat quantity measurement with a fixed flow rate value is not possible in
systems with 2 solar pumps.
FMAX
Flow rate in l/min
Adjustment range: 0.5 … 100.0
Factory setting: 6.0
Note
The FMAX channel will be available only if the SEN channel has been set
to OFF or if no VFD Grundfos Direct Sensor™ is activated.
Heat quantity measurement with a VFD Grundfos Direct Sensor™
Heat quantity measurement with a VFD Grundfos Direct Sensor™ is possible in
all system layouts.
In order to use a VFD Grundfos Direct Sensor™ for heat quantity measurement,
proceed as follows:
Î
Register the VFD Grundfos Direct Sensor™ in the GFD channel.
Î
Adjust the position of the VFD Grundfos Direct Sensor™ in the SEN channel.
Î
Adjust the antifreeze type and concentration of the heat transfer fluid in the
channels MEDT and MED%.
Heat quantity measurement with a PWM feedback signal
Heat quantity measurement with a PWM feedback signal is possible in all system
layouts. In systems 2, 6, 7, 8 and 9, and additional VFD Grundfos Direct Sensor™ is
required for measuring the temperature.
Î
Register the PWM feedback signal of a bidirectional HE pump on the channels
PFB1 / PFB2.
Î
Adjust the antifreeze type and concentration of the heat transfer fluid in the
channels MEDT and MED%.
The VFD Grundfos Direct Sensor™ can optionnaly be used for measuring the tem-
perature:
Î
Register the VFD Grundfos Direct Sensor™ in the GFD channel.
Î
Adjust the position of the VFD Grundfos Direct Sensor™ in the SEN channel.
Note
if a VFD Grundfos Direct Sensor™ is optionally activated, it will not be
used for measuring the flow rate but for measuring the flow and return
temperature respectively.
Note
In systems 6 and 7, both flow rate values of the PWM feedback signals will
be added together for heat quantity measurement.
Note
If the PWM feedback signal sends an error message, heat quantity meas-
urement will not be carried out.
SEN
Digital flow rate sensor (only if GDF = 12, 40 or 40 F)
Selection: OFF, 1, 2
Factory setting: 2
Flow rate detection type:
OFF : PWM feedback signal or fixed flow rate value (flowmeter)
1 : PWM feedback signal or Grundfos Direct Sensor™ in the flow pipe
2 : PWM feedback signal or Grundfos Direct Sensor™ in the return pipe