Fujitsu AIRSTAGE J-IIIL, Design & Technical Manual

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2-26. Electricity charge apportionment setting (System
controller, Touch panel controller)
Electricity meters are required to use an electricity charge apportionment function. To perform the
functions mentioned here, one of the controller listed below is required:
• System controller
• System controller lite
• Touch panel controller
¢
Electricity charge apportionment and electricity meter
When implementing the electricity charge apportionment function in a VRF System, a configuration
which does not use electricity meters or a configuration which uses electricity meters can be select-
ed. The differences between these two configurations are explained below.
The electricity charge apportionment function apportions the power consumption to each block (ten-
ant indoor unit) defined in advance according to the usage record, after the power consumption
(electricity charge) of the air conditioners is input to the System Controller. Electricity charge appor-
tionment calculation becomes possible only after inputting the power consumption (or electricity
charge).
Electricity charge apportionment when electricity meter not used
Only after the electricity bill is received from the electric power company and the billed amount is in-
put into the System Controller, can electricity charge apportionment for the billed period be calculat-
ed.
Electricity charge apportionment when electricity meter used
Since the power consumption data is sent from the electricity meter to the System Controller at any
time, basically electricity charge apportionment calculation can be performed at any time. Because
an actual System Controller calculate power charge apportionment data in one day units, electricity
charge apportionment calculation can be performed at an arbitrary day in one day units.
Example 1:
When the tenants of a tenant building, etc. are billed for their air conditioning electricity charge once
a month, if the electricity bill arrives from the electric power company each month, the electricity
charge apportionment function can be used without electricity meters because electricity charge ap-
portionment can be performed based on that bill and the tenants can be billed. Even if there are ten-
ants moving in and out within a month, appropriate billing can be performed after the bill was re-
ceived from the electric power company. However, when the electricity bill is received from the elec-
tric power company once every 3 months, electricity charge apportionment for 3 months cannot be
calculated until the bill is received. In this case, building owner can only bill the building tenants for
air conditioning electricity charges every 3 months. However, if electricity meters are installed, billing
at an arbitrary interval, for example, once a month, is possible.
Example 2:
When air conditioning electricity charge is billed based on the electricity charge apportionment func-
tion for each room in hotels etc., because guests leave and arrive daily and the electricity charge is
calculated each time, you cannot wait for the electricity bill to arrive from the electric power company.
In such cases, it must be possible to be able to calculate electricity charge apportionment at any time
using electricity meter.
2-26. Electricity charge apportionment setting (System controller, Touch panel
controller)
- (07-137) -
2. Function settings
FUNCTION SETTINGS FUNCTION SETTINGS