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SCU224
4.1.7 Heat quantity balancing
OHQM:Heat quantity measu-
rement
Adjustment range: OFF ... ON
Factory setting: OFF
A heat quantity balancing is possible for the basic systems
(Arr) 1, 3, 4 and 5 in conjunction with a flowmeter. You
just have to activate the option heat quantity balancing in
channel OHQM.
The volume flow readable at the flowmeter (l/min) must
be adjusted in the channel FMAX. Antifreeze type and
concentration of the heat transfer medium are indicated on
channels MEDT and MED%.
Type of antifreeze:
0 : water
1 : propylene glycol
2 : ethylene glycol
3 : Tyfocor
®
LS / G-LS
Note: When using Tyfocor HTL antifreeze set the Type to
the 1 (propylene glycol), and set the concentration to 50%
The heat quantity transported is measured by the indication
of the volume flow and the reference sensor of feed flow
S1 and return flow S4. It is shown in kWh-parts in the in-
dication channel kWh and in MWh-parts in the indication
channel MWh. The sum of both channels form the total
heat output.
The heat quantity added up can be reset. As soon as one
of the display channels of the heat quantity is selected, the
symbol is permanently shown on the display. The button
SET (OK) must be pressed for approx. 2 seconds in order to
get back into the RESET-mode of the counter. The display-
symbol is flashing and the value for heat quantity will be
set to 0. In order to finish the RESET-procedure, the button
SET (OK) must be pressed for con firmation.
In order to interrupt the RESET-procedure, no button
should be pressed for about 5 seconds. The controller re-
turns automatically into indication mode.
FMAX: Volume flow in
l/min
Adjustment range 0 ... 20
in steps of 0,1
Factory setting 6,0
kWh/MWh:Heat quantity
in kWh / MWh
Display channel
MEDT: antifreeze
Adjustment range 0 ... 3
Factory setting 1
MED%: Concentration of
antifreeze in (Vol-) %
MED% is blinded out by
MEDT 0 and 3.
Adjustement range 20 ... 70
Factory setting 45
4.1.6 Operating hours counter
The operating hours counter adds up the solar operating
hours of the respective relay (h P / h P1 / hP2). Full hours
are shown on the display.
The operating hours added up can be reset. As soon as
one operating hours channel is selected, the symbol
in
permanently shown on the display. The button SET (OK)
must pressed for approx. 2 seconds in order to get back
into the RESET-mode of the counter. The display-symbol
is flashing and the operating hours will be set to 0. In order
to finish the RESET-procedure, the button SET (OK) must
be pressed in order to confirm.
In order to interrupt the RESET-procedure, no button
should be pressed for about 5 seconds. The controller re-
turns automatically into the indicaton mode.
h P / h P1 / h P2:
operating hours counter
Indication channel
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