2WAY SYSTEM
Control Functions - Outdoor unit
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10. Demand Control
2WAY VRF SYSTEM
Control Functions
(1)
The standard value of the limit current is the table below.
10. Demand Control
Usual Demand Control
(2)
When the Energy Saving button of the indoor unit remote controller is pressed, demand control is performed
according to EEPROM : 1A values.
The marking “
” indicated in the following table is applicable to the function of control.
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:
Energy Saving Button (CZ-RTC5A)
Setting No.
0
1
Discharge
temperature
control
Demand
control
Remarks
No controls
Pattern “C” only discharge temperature
2
Pattern “B” only demand control
3
(at factory shipment)
Pattern “A” demand c discharge temp. control
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.
Demand control is performed under the current limitation values set at the outdoor unit EEPROM setting (DN1A).
Discharge temperature limitation control is performed set at the indoor unit EEPROM setting.
Outdoor unit EEPROM setting (DN18) :
A.
B.
C.
Outdoor unit EEPROM setting (DN19):
Setting of control validity range when pressing the Energy Saving button
* 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”.
Setting No.
0
(at factory shipment)
1
Control range
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.
Type of outdoor unit
10HP
12HP
14HP
16HP
unit:Amp.
HP=Horsepower
unit:Amp.
HP=Horsepower
10.7
13.7
17.4
21.1
11.1
8HP
7.8
8.0
12.9
16.6
18.9
18HP
20HP
23.2
26.7
21.1
25.9
Cooling mode
Heating mode
The system current value is controlled at 140% rated current value without demand input.
Limit value
Type of outdoor unit
10HP
12HP
14HP
16HP
Limited ratio against standard value
140%
140%
140%
140%
15.0
19.2
24.4
29.5
Cooling mode
15.5
8HP
140%
10.9
11.2
18.1
23.2
26.5
18HP
20HP
140%
140%
32.5
37.4
29.5
36.3
Heating mode
2WAY SYSTEM
Control Functions-Outdoor Unit
10. Upper Current Limitation Mode
EEPROM setting in main outdoor unit
EEPROM setting in main outdoor unit
CODE: 1A
CODE: 1E
Setting No.
0
No display
1
2
Information is displayed when input of demand control is set (at factory shipment).
Information is displayed only when the capacity is restricted by demand control.
Control
Contact 1
Upper current limitation setting
Contact 2
No control (Operates to maximum capacity)
Operates to XX% of the upper limit for the rated current.
Operates to YY% of the upper limit for the rated current.
Forced thermostat OFF setting
Serial-parallel I/O must be connected in order to perform demand control.
The below input is received by serial-parallel I/O, and demand control is performed.
The demand values can be set as needed with serial-parallel I/O.
It is able to display the present condition on the remote controller.
* The rated current indicates the current value that is listed in the catalog or similar material.
* XX and YY are able to set in EEPROM of main outdoor unit.
: Input present
: Input not present
(3) Serial-parallel I/O
CODE: 1B
Setting No.
0
40
45
-1
130
YY
0
40
45
No control
130
Setting No.
0
40
45
-1
130
100
XX
0
No control
130
Interval of “5”
40
45
100 (at factory shipment)
70
Interval of “5”
70 (at factory shipment)
NOTE
Since the pattern “A” and “B” perform the outdoor unit current demand control (compressor’s suppressive
drive), it is easy to grasp energy saving amount.
However, it may cause the reduction of capacity in all indoor units of the same refrigerant system.
In order to make the indoor unit (group) only valid as the energy saving function where the Energy Saving
button is pressed and not to influence to other indoor units, be sure to set the outdoor unit EEPROM setting
DN18 to “1” and DN19 to “0”.
SM830253-00_欧州2way7_SM-TRSM.indb 32
16/08/26 19:23:19
