Fujitsu AB* A12GATH, Design & Technical Manual

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2-28.
ELECTRICITY CHARGE APPORTIONMENT SETTING
(SYSTEM CONTROLLER, TOUCH PANEL CONTROLLER)
In this section, an electricity charge apportionment function which uses electricity meters is
explained. System Controller (UTY-APGXZ1, UTY-PEGXZ1) or System Controller Lite (UTY-
ALGXZ1, UTY-PLGXA2) or Touch panel controller (UTY-DTG*Z1, UTY-PTGXA) is required to
perform these functions.
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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 selected. The differences between these two configurations are explained
below.
The electricity charge apportionment function apportions the power consumption to each
block (tenant 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 apportionment 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 input into the System Controller, can electricity charge apportionment for the billed period be
calculated.
[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 apportionment can be performed based on that bill and the tenants can be
billed. Even if there are tenants moving in and out within a month, appropriate billing can be
performed after the bill was received from the electric power company. However, when the
electricity bill is received from the electric 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
function 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.
- (07-176) -
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