STIEBEL ELTRON SOM 9s - Manual (Page 86)

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SOM 9s
DT3 / DT3O
Switch-on temperature diff.
Adjustment range: 2.0 ... 90.0 °R
in steps of 1.0 °R
Factory setting: 12.0 °R
DT3 / DT3F
Switch-off temperature diff.
Adjustment range: 1.0 ... 89.0 °R
in steps of 1.0 °R
Factory setting: 8.0 °R
DT3 / DT3S
Set temperature diff.
Adjustment range: 3.0 ... 90.0 °R
in steps of 1.0 °R
Factory setting: 20.0 °R
DT3 / RIS3
Rise
Adjustment range: 2 ... 40 °R
in steps of 2 °R
Factory setting: 4 °R
Heat exchange function / solid fuel boiler / return
preheating
The heat exchange function is used for transporting heat
from tank 1 to tank 2.
Additionally, minimum and maximum temperature limits and
the corresponding switch-on and switch-off differences can
be set for the independent temperature differential control.
Both switch-on and switch-off temperature differences
DT3O and DT3F as well as the set temperature difference
DT3S and rise RIS3 are valid.
Minimum temperature limitation
Maximum temperature limitation
DT3 / MIN3O
Switch-on temperature
Adjustment range:
30.0 ...190.0 °F
Factory setting: 40 °F
DT3 / MIN3F
Switch-off temperature
Adjustment range:
30.0 ...190.0 °F
Factory setting: 50 °F
ARR= 2, 11, 16, 17, 18
MIN3O 40 °F
MIN3F 50 °F
ARR= 8, 13, 26
MIN3O 140 °F
MIN3F 149 °F
DT3 / MAX3O
Switch-on temperature
Adjustment range: 3
0.0...200.0 °F
Factory setting: 140 °F
DT3 / MAX3F
Switch-off temperature
Adjustment range:
30.0...200.0 °F
Factory setting: 136 °F
If the adjusted value MAX3O is exceeded, the relay will
be switched off. If the temperature falls below the adjusted
value MAX3F, the relay will be energized.
Reference sensor:
S3 for ARR 8, 13, 26 (TSTT)
S4 for ARR 2, 11, 16, 17, 18, 24 (TST2B)
If the temperature falls below the adjusted value MIn3O,
the relay will be switched off. If the adjusted value MIn3F
is exceeded, the relay will be energized.
Reference sensor:
S3 for ARR 8, 13, 26 (TSFB)
S4 for ARR 2, 11, 16, 17, 18, 24 (TSTT)