DT3 8
PUSH
DT3O
Switch-on temperature
difference
Adjustment range:
1.0 … 50.0 K
Factory setting: 6.0 K
DT3F
Switch-off temperature
difference
Adjustment range:
0.5 … 49.5 K
Factory setting: 4.0 K
DT3S
Set temperature difference
Adjustment range:
1.5 … 50.0 K
Factory setting: 10.0 K
RIS3
Rise
Adjustment range: 1 … 20 K
Factory setting: 2 K
MAX3F
Switch-off temperature
Adjustment range:
0.0 … 94.5 °C
Factory setting: 58 °C
MIN3F
Switch-off temperature
Adjustment range:
0.5 … 90 °C
Factory setting: 10 °C
ARR = 2, 11, 16, 17, 18
MIN3O 5.0 °C
MIN3F 10.0 °C
ARR = 8, 13, 26
MIN3O 60.0 °C
MIN3F 65.0 °C
MAX3O
Switch-on temperature
Adjustment range:
0.5 … 95.0 °C
Factory setting: 60 °C
MIN3O
Switch-on temperature
Adjustment range:
0.0 … 89.5 °C
Factory setting: 5 °C
S2DT3
Store 1 reference sensor:
Selection: 2.3
Factory setting: 3
Store 2 reference sensor:
Selection: 4, 5
Factory setting: 4
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DT3 / Heat exchange function / Solid fuel boiler / Return preheating
Heat exchange function
The Heat exchange function can be used for transferring heat from a heat source
to a heat sink.
The relay (system-dependent) is energised when all switch-on conditions are ful-
lled:
• the temperature difference between the sensors heat source and heat sink has
exceeded the switch-on temperature difference.
• the temperature at the heat source sensor has exceeded the minimum tem-
perature
• the temperature at the heat sink sensor has fallen below the maximum tem-
perature
When the Set temperature difference is exceeded, pump speed control starts. For
every increase or decrease by the rise value, the pump speed will be adjusted by
10 %.
Solid fuel boiler
The Solid fuel boiler function can be used for transferring heat from a solid fuel
boiler to a store.
The relay (system-dependent) is energised when all switch-on conditions are
fullled:
• the temperature difference between the sensors heat source and heat sink has
exceeded the switch-on temperature difference.
• the temperature at the solid fuel boiler sensor has exceeded the minimum tem-
perature
• the temperature at the store sensor has fallen below the maximum temperature
When the Set temperature difference is exceeded, pump speed control starts.
For every increase or decrease by the rise value, the pump speed will be adjusted
by one step (10 %).
Return preheating
The Return preheating function can be used for transferring heat from a heat
source to the heating circuit return.
The relay (system-dependent) is energised when the following switch-on condition
is fullled:
• the temperature difference between the sensors store return and heating circuit
return has exceeded the switch-on temperature difference.
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