D e lt a S o l
®
C/4
© RESOL 11103 deltasol_c/4.monen.indd
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4.1.8 Heat quantity measurement
OHQM: Heat quantity
measurement
Adjustment range: OFF...ON-
Factory setting: OFF
Heat quantity measurement is possible if a flowmeter is
used. For this purpose, the heat quantity measurement option
OHQM has to be enabled.
The flow rate should be read from the flowmeter (l/min)
and has to be adjusted in the channel FMAX. Antifreeze
type and concentration of the heat transfer medium have
to be adjusted in the channels MEDT and MED%.
Antifreeze type:
0 : water
1 : propylene glycol
2 : ethylene glycol
3 : Tyfocor
®
LS / G-LS
FMAX: Flow rate in l/min
Adjustment range: 0...20,
in 0.1 steps
Factory setting: 6,0
kWh/MWh:Heat quantity
kWh / MWh
Display channel
MEDT: Antifreeze type
Adjustment range: 0...3
Factory setting: 1
MED%: Antifreeze concen-
tration in (Vol-) %
When MEDT 0 or 3 is used,
the parameter MED% is
‚hidden‘.
Adjustment range: 20... 70
Factory setting: 45
The flow rate as well as the reference sensors S1 (flow) and
S4 (return) are used for calculating the heat quantity supplied.
It is shown in kWh in the channel kWh uand in MWh in the
channel MWh . The overall heat quantity results from the
sum of both values.
The accumulated operating hours can be set back to zero.
As soon as one of the display channels of the heat quantity
is selected, the symbol
is displayed. Press the SET (3)
button for approx. 2 seconds in order to access the RESET-
mode of the counter. The display symbol will flash and
the heat quantity value will be set to 0. Confirm the reset
with the button in order to finish the reset.
In order to interrupt the RESET process, no button should
be pressed for about 5 seconds. The display returns to the
display mode.
4.1.9 ∆T-regulation
Please note: The switch-on temperature difference must
be at least 1 K higher than the switch-off tempe rature
difference.
DT O:
Switch-on temperature diff.
Adjustment range: 1,0...20,0 K
Factory setting: 6.0
DT F:
Switch-off temperature diff.
Adjustment range: 0,5 ... 19,5 K
Factory setting 4.0 K
This function is a standard differential control. If the switch-
on differential is reached (DT O), the pump is operated. The
pump runs at 100% speed for 10 seconds. After this period,
the pump runs at minimum pump speed (nMN = 30 %). If
the temperature difference reaches the adjusted set value
(DT S), pump speed will increase by one step (10%). If the
difference increases by 2 K (RIS), pump speed will increase
by 10 % respectively until the maximum pump speed of 100 % is
reached. The response of the controller can be adapted via the
parameter „Rise“. If the temperature difference falls below
the adjusted switch-off temperature difference (DT F),
the controller switches off.
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