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5-2 Energy-Save Control and Peak Cut Control
Click on [Functions 1] – [Peak Cut] in the menu to bring up the peak cut control screen, and make necessary peak cut settings to use the energy-save or peak cut control function.
Click [Save Settings] to send setting data to the G-50A.
Note: The use of energy-save/peak cut control functions requires a separate license registration.
Confirm on the license registration screen (Ch8) that the license registration has been completed.
Note: If the user logs in as a building manager, some of the operations may be prohibited.
PLC Software for demand input
Enter IP address and demand level report recipient.
Control Level
Set the range of electric power
(average electric power) at each energy-save level. PLC Initialize
Click here to initialize the internal memory of the PLC.
Temperature difference between set point and inlet
With this limit or greater difference, indoor units will not be controlled on level 0. Electric Amount Count Software
Enter IP addresses, pulse units, and watt-hour meter terminal inf. here.
Outdoor unit control method
Set the outdoor unit control method.
Refresh
Read setting data from G-50A and PLC.
Indoor unit control method
Set the indoor unit control method.
Save Settings
Send setting data to G-50A and
PLC.
The use of energy-save/peak cut control requires the user to make certain settings as shown in the table below. The settings required depend on the configuration of the system.
Table 5-3 Required Settings for Energy-save and Peak-cut Controls
Items
5-2-1 PLC Initialize
Functions Energy-Save
Control
Peak-cut Control
Electric Power
Monitor Method
Demand
Controller Method
V V
5-2-2 PLC Software for demand input V
5-2-3 Electric Amount Count Software
5-2-4 Control Level
5-2-5 Temperature difference between set point and inlet
5-2-6 Outdoor unit control method
5-2-7 Indoor unit control method
V
V
V V V
V V V
V V V
Demand level report
G-50A
Energy-Save Control
G-50A
Always performs level
0 control
Demand Controller Method
Demand level contact input
PLC (with Electric
Amount Count Software)
Demand
Controller
Electric Power Monitor Method
Monitors electric power
G-50A
Pulse
PLC (with Electric
Amount Count Software)
Pulse-method watt-hour meter
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5-2-1 Initialization of the PLC (When the PLC is in use)
Before using the PLC Software for demand input or Electric Amount Count Software, click on the PLC initialize button once to initialize the internal memory.
Note: Do not initialize the memory after the operation has begun, for it will clear all operation data.
5-2-2 Setting the PLC software for demand input (demand input method)
(1) Enter the IP address for the PLC software for demand input.
(2) Enter the IP address of the G-50A to which the demand levels are reported. A maximum of 10 addresses can be registered.
5-2-3 Setting the Electric Amount Count Software (Electric power monitor method)
(1) Enter the IP address of the electric amount count software.
(2) Enter the unit of the pulse that the watt-hour meter outputs.
Note: If the pulse unit field is left blank, there will be no change to the pulse unit; only the information that was entered in the IP address and DI board field will be saved.
(3) Select the terminal number of the DI board to which the watt-hour meter is connected. If it is connected to terminal 2 on DI board 1, select 1-2.
Note: Select an input board from either 1 or 2, and select an input terminal from 0 to F. Choose the terminal to which the watt-hour meter is connected that is used for peak cut.
5-2-4 Setting the Control Level (Electric Power Monitor Method)
Determine the range of electricity use for each control level (demand level), taking into consideration such factors as delayed control of the air conditioner. Enter the value that is 10 to 15% below the maximum demand value (average electric energy value in 30 minutes) in the blank next to Level 4. Decrease the value by about 10 % for each level below. (The figure on the right shows the system with the maximum electric energy at 200 kW.)
Note: The best set point depends on the system configuration of the electric equipment and the indoor environment in each building. Choose appropriate set points accordingly.
Note: The amount of electricity that is actually used may exceed the demand value due to such unexpected incidents as controller problems or broken transmission lines. Mitsubishi will not be responsible for such incidents.
5-2-5 Setting the temperature difference between set point and inlet (All methods)
When the energy-save level is set to 0 (It is always set to level 0 in an energy-save control method), energy-save control will not be performed for the indoor units that show a greater difference between the set temperature and indoor temperature than the value set in the window on the right.
Make the setting when some type of energy-saving control is effective at energy-save level 0 and the level of comfort is high on priority list. (Choose between 3 to 9)
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5-2-6 Setting the Outdoor Unit Control Method (All methods)
Make the energy-save control setting for the outdoor units for each energy-save level.
Copy
Click to copy the settings.
Paste
Click to paste the settings.
Control Level
Batch Operations
Used to make settings for all outdoor units at once. Maximum Capacity
Select the upper limit of outdoor unit operating capacity.
Control Time
Select the control time.
(1) Set the maximum operating capacity at each level.
Normally, outdoor units operate at 100% capacity.
The smaller the maximum operating capacity, the more energy will be saved.
Capacity
Maximum Capacity at 80%
Note: Energy-saving effects cannot be expected when the outdoor units are running with low load and are operating below the set capacity level.
Note: Do not use the capacity-save control with heat- accumulating units (ICE-Y) or Multi S units. On these units, always set the capacity to “100%.”
80%
Capacity
Value
No energy-saving effects
Amount of saved energy
With energy-saving effects
Time
(2) Set the control time at each level. When a capacity-save control over outdoor units is performed, it is recommended that the control time be set to either 30 or 15 minutes, for shorter control time is not likely to bring much benefit.
If any time other than “30-minute” is selected, the control is done on rotation so as to avoid the overlapping of control time of the connected outdoor units as much as possible.
(3) To copy the settings for a certain outdoor unit to another outdoor unit, click [Copy] so the selected items are shown in yellow-green, and click [Paste] on the screen for the target outdoor unit.
To make settings for all the outdoor units at once, check [Batch Operations], and enter the settings.
Uncheck [Batch Operations] by clicking on the box again to enable the individual setting of the outdoor units.
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5-2-7 Setting the Indoor Unit Control Method (All methods)
Make the energy-save control settings for the outdoor units for each energy-save level.
The settings are made for each operation block. If the operation blocks have not been set up, refer to section 4-5 on how to set the operation blocks.
Copy
Click to copy the settings.
Paste
Click to paste the settings.
Control Level
Batch Operations
Used to make settings for all outdoor units at once. Control Method
Select indoor unit control method.
Control Time
Select the control time.
(1) Set the control method for each level. Fan control can be performed without letting the users know that the energy-save control is performed because it performs thermo-off control of the indoor units and the mode display on the remote controller LCD will not change.
The modes on the K-control models and the models before free plan will change to “Fan.”
Control Method
Table 5-4 Indoor Unit Control Method
Type of Control
N/A
± 2 ºC Control
No control is performed.
Cooling/dry : +2 ºC ; Heating : -2 ºC (No control during fan/auto)
Note: Shifts to a ±2ºC control at control begin time, and goes back to the normal setting at control end time.
Performs “capacity save 0% control (thermo OFF)” on free-plan indoor units and
A-control slim indoor units, and performs fan operation control on the K-control units and the units before free-plan units. Fan Control
Note: Switches to thermo OFF or Fan mode at control begin time, and switches back to the original state at control end time.
Stops the indoor units
Note: Sends [Stop] at control begin time, and goes back to the original run/stop status at control end time. Stop Control
Note: If set to [30 minutes][Stop], the groups that are being controlled cannot be operated from any controller.
(2) Set the control time for each level.
The unit of control is 3 minutes. If “6 minutes” is selected, 3 minutes of control is performed twice during each 30 minute period
If any time other than “30-minute” is selected, the control is done on rotation so as to avoid the overlapping of control time of the connected outdoor units as much as possible.
Control was performed for 6 min.
Group 1
Group 2
Group 3
Control time of day
0 3 5 8 10 15 18 20 23 25 30min.
(3) To copy the settings for a certain operation block to another operation block, click [Copy] so the selected items are shown in yellow-green, and click [Paste] on the screen for the target operation block.
To make settings for all the operation blocks at once, check [Batch Operations], and enter the settings.
Uncheck [Batch Operations] by clicking on the box again to enable the individual setting of operation blocks.
(4) Click [Save Settings] to send setting data to the G-50A.
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