Fujitsu AIRSTAGE UTY-ALGX Instruction Manual page 217

Objectives of Energy Saving:
As the electricity charges increase during high heat load times such as peak summer, you want to
somehow limit such charges.
If possible, you want to reduce about 10% of energy.
Recommended Settings:
Set Outdoor Unit Capacity Save at operation rate of 90% for each Refrigerating System.
By setting a schedule, let this function operates only while the time or season when the heat load is high.
Set operation rate smaller if the energy saving benefits are not up to expected levels.
Using energy meters, monitor the power consumption for each Refrigerating System, and reduce
the operation rate for the Refrigerating Systems having high power consumption compared to other
locations.
On the other hand, increase the operation rate for places where heat is likely to accumulate such as
higher floors.
Energy Saving Benefits:
Energy saving benefits would be obtained for sure, resulting in the reduction of electricity charges.
[Perk cut operation]
Reduces the power consumption by setting a specific target value (maximum average power [kW]) for the
air conditioners and controlling operation to prevent the power consumption from exceeding this value.
Limit control is performed in 3 steps of "Step 1: Set temperature shift" → "Step 2: Thermostat OFF" →
"Step 3: Outdoor unit stop".
To perform this control, an electricity meter must be installed.
Step 3
Step 2
Step 1
Power con-
1 hour limit
sumption
*Specifies the maximum average
electric power [kW] for the entire
air conditioning system.
Without control
1 hour
limit
Group A
Normal
Group C
Group A
Group C
Outdoor unit stop
Time
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217
Indoor units outside
the scope of energy
Normal
saving control
Group B Group A
ON
Group D Group C
Group B Group A
OFF
Group D Group C
Step 3
With control
1 hour
limit
Step 1
Set temperature shift
Group B
ON
Group D
Group B
ON
Group D
Step 2
Thermostat OFF
At target maxi-
mum average
electric power
setting
Time