STIEBEL ELTRON SOM 6 PLUS Bedienung Und Installation Seite 25

MEDT: Type of frost
protection
Setting range 0 ... 3
Factory setting 1
MED%: Antifreeze content
in (Vol-) %
MED% is superimposed
on MEDT 0 and 3
Setting range 20 ... 70
Factory setting 45
kWh/MWh: Heat amount
in kWh / MWh
Display channel
2.6.8 ΔT control
DT E/DT1E/DT2E/DT3E:
Start temperature
differential
Setting range 1.0 ... 20.0 K
Factory setting 6.0
DT A/DT1A/DT2A/DT3A:
Stop temperature
differential
Setting range 0.5 ... 19.5 K
Factory setting 4.0
DT S/DT1S/DT2S/DT3S:
Set temperature differential
Setting range 1.5 ... 30.0 K
Factory setting 10.0
ANS/ANS1/ANS2/ANS3:
Rise
Setting range 1 ... 20 K
Factory setting 2 K
2.6.9 Maximum cylinder temperature
S MX: Maximum cylinder
temperature
Setting range 4 ... 95 °C
Factory setting 60 °C
Type of frost protection:
,$#3
0 : Water
 SET
1 : Propylene glycol
2 : Ethylene glycol
3 : Heat transfer medium (H -30 L/LS)
,$#%
 SET
°C
The amount of heat is calculated by means of the flow rate entered into VMAX
and the temperatures at the reference sensors S1 (flow) and S4 (return). You can
display the yielded amount of heat if the option Heat metering has been enabled
This is displayed in fractions of kWh in display channel kWh and in fractions of
MWh in display channel MWh. The sum of both channels is the total heat yield.
The total heat amount can be reset. As soon as the heat amount channel is
selected, the symbol
(3) key for approx. 2 seconds to access the counter RESET mode. The display symbol
flashes, and the heat amount is reset to 0. To complete the RESET process,
SET
press as acknowledgement.
SET
Wait approx. 5 seconds if the RESET process is to be terminated. The controller
will then automatically revert to display mode.
Note: The start temperature differential must be at least 1 K greater than the stop
#3 $
temperature differential.

SET SET
K
Initially the control unit acts as a standard differential control unit. When
the start differential is reached (DT E), the pump starts and, after the drop-
#3
out impulse (10 s), operates at minimum speed (nMN = 30%). The speed
is increased by one stage (10%) if the temperature differential reaches the
 SET SET
selected set value (DT S). The speed is increased respectively by 10% up to the
K
maximum of 100% with every rise of the differential by 2 K (ANS). The control
characteristics can be adjusted using the "rise" parameter. The controller
switches OFF if the selected stop temperature differential is not reached (DT A).
#3 2
If the option "Drainback" (ODB) is enabled, the following values will be assigned
 SET SET
to parameters DT E, DT A and DT S :
K
DT E =
-2
DT A =
DT S =
 SET SET
The values previously set in these parameters are overwritten.
K
Where the set maximum temperature is exceeded, further heating up of the
2 ,7
cylinder is prevented and thus damaging overheating prevented. Where the
SET
maximum cylinder temperature is exceeded,

°C
Note: Note: The controller is equipped with a cylinder safety stop facility that
prevents further heating at 95 °C.
appears continuously on the display. Hold down the SET
SET
10 K
4 K
15 K
appears on the display.
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