MAXICAL
®
III
5511-229 GB/98.06/Rev. B1
34
The cooling tariff can be used as a basis for differential
consumer billing. Minimal cooling (where the differ-
ence between the flow and return temperatures is only
small) is uneconomical for the heat supplier.
E=5)
Return temperature tariff
When the actual return temperature (t
R
), in °C, is larger
than TL2 but smaller than TL3, thermal energy is
counted in TA2 parallel to the main register. If the
actual return temperature rises, exceeding TL3, thermal
energy will be counted in TA3 parallel to the main
register.
t
R
< TL2
Counting in main register only
TL3 > t
R
> TL2 Counting in TA2, plus main register
t
R
> TL3
Counting in TA3, plus main register
When programming data, make sure that the value you
enter for TL3 is larger than TL2.
The return temperature tariff can be used as a basis for
differential consumer billing. A high return temperature
is an indication that the heat has been poorly utilized -
and is uneconomical for the heat supplier.
E=6)
Average temperature
This tariff type is not registered in TL2 or TL3. How-
ever, for each temperature measurement (integration)
the average flow (t
F
) and return temperature (t
R
) is
determined. These calculations are updated daily, the
total average of each day being stored as daily data.
This information is stored for 31 days.
The display shows the current days average temperature
for both t
F
and t
R
as TA2 and TA3.
Average t
F
å
t
F
/n
TA2
Average t
R
å
t
R
/n
TA3
