Tariff control (optional)
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Heating/Cooling meter (tariff T9)
In tariff register 1, the measured quantity of cold; in tariff register 2, the meas-
ured quantity of heat is summated. In both cases a threshold can be defined
via the temperature hot side (“cold threshold”, “heat threshold”).
Tem
perature above “heat threshold” and temperature difference > +0.2 K
quantity of heat is acquired
Temperature below “cold threshold” and temperature difference < -0.2 K
quantity of cold is acquired
Tariff control via timer switch (tariff T10)
For tariff control, one switch-off time and one switch-on time per day can be
defined. At the switch-on time, summation of the quantity of energy or volume
is started in tariff register 1; at the switch-off time, it is ended.
Tariff control via M-Bus (tariff T11)
In tariff registers 1, 2 and 3, either the quantity of energy or the volume can be
summated. With the relevant M-bus command, one of the 3 tariffs can be acti-
vated or all tariffs can be deactivated.
Surcharge quantity tariff by means of return temperature (tariff T12)
The quantity of energy is summated depending on the temperature cold side
in tariff registers 1 or 2.
The summated quantity of energy is calculated from the difference of the tem-
perature cold side from the defined return temperature threshold (instead of
from the temperature difference).
Above return threshold: T1 is summated
Below return threshold: T2 is summated
Display of the tariff situation on the LCD
The current tariff status is shown in the user loop “LOOP 0“ together with the
quantity of energy or the volume.
No tariff status is shown for tariffs T7 and T8.
For tariffs T2, T3, T4, T5, T6, T10, T11 and T12
no tariff register active
tariff register 1 active
tariff register 2 active
tariff register 3 active
For tariffs T9 (heating/cooling meter)
no tariff register active
tariff register 1 active
tariff register 2 active
The type of tariff and the associated parameters are displayed in service loop
“LOOP 4”.
