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10. Demand Control
10. Demand Control
(1)
Usual Demand Control
The standard value of the limit current is the table below.
Type of outdoor unit
Cooling mode
Heating mode
1
The system current value is controlled at 140% rated current value without demand input.
Type of outdoor unit
Limited ratio against standard value
Limit value
(2)
Energy Saving Button (CZ-RTC5A)
When the Energy Saving button of the indoor unit remote controller is pressed, demand control is performed
according to EEPROM : 1A values.
Setting of Energy Saving button: Outdoor unit EEPROM Setting item DN18, DN19
Energy saving operation when the Energy Saving button is pressed provides 3 patterns of control.
Patterns:
A.
Demand control is performed under the current limitation values set at the outdoor unit EEPROM setting (DN1A).
In addition, the indoor unit controls the limitation of discharge temperature.
B.
Demand control is performed under the current limitation values set at the outdoor unit EEPROM setting (DN1A).
C.
Discharge temperature limitation control is performed set at the indoor unit EEPROM setting.
Outdoor unit EEPROM setting (DN18) :
The marking "
Setting No.
0
1
2
3
(at factory shipment)
Outdoor unit EEPROM setting (DN19):
Setting of control validity range when pressing the Energy Saving button
Setting No.
0
(at factory shipment)
1
* When the pattern "A" and "B" are selected, energy saving control becomes valid in the same range as the
setting "1" although the Setting No. is set to "0".
8HP
10HP
7.8
10.7
8.0
11.1
8HP
140%
Cooling mode
10.9
Heating mode
11.2
" indicated in the following table is applicable to the function of control.
Discharge
Demand
temperature
control
control
Energy saving activates where Energy Saving button is pressed as a unit of indoor
unit (group).
Energy saving activates where Energy Saving button is pressed as a unit of indoor
unit including all refrigerant system.
12HP
14HP
13.7
17.4
12.9
16.6
10HP
12HP
14HP
140%
140%
140%
15.0
19.2
24.4
15.5
18.1
23.2
No controls
Pattern "C" only discharge temperature
Pattern "B" only demand control
Pattern "A" demand control + discharge temp. control
Control range
1 - 32
2WAY VRF SYSTEM
2WAY SYSTEM
Control Functions
Control Functions - Outdoor unit
unit:Amp.
16HP
18HP
20HP
21.1
23.2
18.9
21.1
HP=Horsepower
unit:Amp.
16HP
18HP
140%
140%
29.5
32.5
26.5
29.5
HP=Horsepower
Remarks
26.7
25.9
20HP
140%
37.4
36.3
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