Fujitsu Airstage J-II Series Design & Technical Manual page 801

2-24. 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-DTGYZ1, UTY-PTGXA) is required to
perform these functions.
„ 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 Input Power to each block
(tenant indoor unit) defined in advance according to the usage record, after the Input Power
(electricity charge) of the air conditioners is input to the System Controller. Electricity charge
apportionment calculation becomes possible only after inputting the Input Power (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 Input Power data is sent from the electricity meter to the System Controller at any
time, electricity charge apportionment calculation can be performed at any time. Because the
System Controller calculates the energy charge on a daily basis, it can be performed at any
time.
Example (1)
When the tenants are billed for their air conditioning electricity charge once a month and 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. 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. When the electricity bill is received from the electric power company
once every 3 months, the 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 a hotel etc., because guests leave and arrive daily, the electricity
charge is calculated each time they leave. Therefore, you cannot wait for the electricity bill to
arrive from the electric power company. In such cases, an electricity meter must be used to
calculate electricity charge apportionment.
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