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*
The indoor unit operation stoppage rate can be selected from 10% to 30%.
Without control
Example of Use
Overview of Property:
Usage at own office building. Each floor are configured as rooms or blocks separated by partitions,
and each room/block has multiple indoor units not linked with Remote Control Groups.
Objectives of Energy Saving:
You want to save energy consumed by air-conditioners that is large portion of energy consumption
to reduce the running cost of the building. You have no specific numerical targets.
Recommended Settings:
Set Energy Saving Groups by each room/block and set Indoor Unit Rotation at thermostat-off rate of 10%.
However, do not set anything for server rooms etc where air-conditioners need to be continuously
operational, or for the room with high heat load due to direct exposure to sunlight.
When energy saving benefits are not adequate, increase the thermostat-off rate of Energy Saving
Groups after verifying the impact on comfort.
Energy Saving Benefits:
Over the entire year, energy saving benefits are obtained according to the usage of air-conditioners.
Especially, benefits during high heat load hours such as afternoons in summer are high.
[Out door unit capacity save]
The power consumption is reduced by limiting the upper limit of the outdoor unit capacity for each refrig-
erant system.
This has a reducing effect especially in the summer, winter and other times when the heat load is high.
In addition, because the upper limit capacity of the outdoor units is limited directly, it is a control which
easily exhibits an energy saving effect compared to rotation control.
However, because the outdoor unit does not operate above the limited capacity, there may be a loss of
comfort, depending on the room heat load.
*
The operation capacity upper limit rate [%] of the outdoor unit is specified for each refrigerant system.
Maximum capacity of outdoor unit
[%]
100
70
50
0
Example of Use
Overview of Property:
Usage at a leased building. No separate air-conditioning charges are collected.
Refrigerating Systems are separated for each floor and electricity meters are installed for each Re-
frigerating System.
Copyright© 2013-2015 Fujitsu General Limited. All rights reserved.
Time
Indoor heat load
[Time]
216
With control
Time
[kW(Btu/h)]
0
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