Comdronic AC7, Operating Instructions Manual, Page: 8 / 22

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Fig. 2
*
If the measured
Δp
reaches the design
Δp
for the selected valve, the flow status message will be FLOW OK .
However, if the design
Δp
is not met the flow status message will be LOW FLOW .
The Advanced Display can show more complex commissioning data and it may be preferred to the DP And
Flow Display if automatic balancing valves are being measured or if a system of proportional balancing is being
adopted. Fig. 3 shows an example of displayed data when a variable orifice valve has been selected and fig. 4
shows an example of displayed data when an externally adjustable automatic balancing valve has been
selected.
Fig. 3
**
These are iterative processes due to the unknown valve authority in the circuit and so 2-3 attempts may be
required to achieve the desired reading. Please also note that in conjunction with pressing the
◄
or
►
button
on the AC7 , the physical handwheel setting of the valve will also need to be changed to match the new value.
6
Current cartridge
setting.
Flow status
message.
*
Details of the
selected valve.
Derived Flow.
Measured
Δp
.
20.48
FlowCon Green Green.0 15-25mm
KPa
l / s
0.210
FLOW
OK
l / s
0.210
5.00
Design Flow for
this valve at this
setting.
Press the
▲
button to change
valve setting.
Current
handwheel setting.
Kvs of the selected
valve at the current
handwheel setting.
Derived Flow as a % of the
Target Flow. If no Target
Flow has been entered,
“ --- “ is displayed.
Derived Flow.
Measured
Δp
.
5.30
Crane Variable D930/DM930 15mm
KPa
l / s 0.256
DESIGN
4.00 Kvs
4.00
101%
103%
TARGET
3.82
3.95
Press the
▲
button to MANUALLY
change the handwheel setting that
the AC7 is using.
Derived Flow as a % of the
Design Flow. If no Design
Flow has been entered,
“ --- “ is displayed.
Predictive handwheel
setting to achieve the
Design Flow.
Use the
◄
button to
AUTOMATICALLY
change the ‘Current
Handwheel Setting’
being used by the AC7
to this value.
**
Predictive handwheel
setting to achieve the
Target Flow.
Use the
►
button to
AUTOMATICALLY
change the ‘Current
Handwheel Settin g’
being used by the AC7
to this value.
**