en
46
Installation
Indications,
functions and options
Messages
Commissioning
Operation and function
19
OHQM 19
PUSH
FMAX
Flow rate in l/min
Adjustment range: 0.5 … 100.0
in steps of 0.1
Factory setting: 6.0
MEDT
Heat transfer fluid
Adjustment range: 0 … 3
Factory setting: 3
SFHQM
Flow sensor
Adjustment range: 1, 3, 4
Factory setting: 1 / 3
MED%
Antifreeze concentration in vol. %
(MED% will not be displayed
when MEDT 0 or 3 is used)
Adjustment range: 20 … 70 %
in steps of in 1 %
Factory setting: 45 %
SRHQM
Return sensor
Adjustment range: 2, 3, 4
Factory setting: 2 / 4
FTYPE
Flow rate detection type:
Selection: 1, 2
Factory setting: 1
OHQM
Heat quantity measurement option
Adjustment range: OFF / ON
Factory setting: OFF
19 Heat quantity measurement
The heat quantity measurement can be carried out in 2 different ways: without V40
flowmeter or with V40 flowmeter
Note
The most precise heat quantity measurement is achieved by using sensors
in the flow and return pipes as well as a flowmeter.
In 2-collector systems, heat quantity measurement can only be carried out
with sensors installed in the common flow and return pipes.
Flow
sensor
V40 /
flowmeter
Return sensor
Example of flow and return sensor positions for heat quantity measurement.
Î
Enable the heat quantity measurement option in the channel OHQM.
Î
Select the type of flow rate detection in the channel FTYPE.
Flow rate detection type:
1 : Fixed flow rate value (flowmeter)
2 : V40
Note
If the flow rate detection type V40 has been adjusted,the impulse rate of
the sensor must be adjusted in the SENS menu (see page 47).
Note
If a V40 is used as the flow rate sensor (flow rate detection type 2) and is
then deactivated in the SENS menu, the flow rate detection type will be
set to 1 (flowmeter) and heat quantity measurement will be deactivated.
OFF
ON
19
BACK
PUSH
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