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Mini VRF SYSTEM
Control Functions - Outdoor unit
1
9. Demand Control
2WAY SYSTEM
Control Functions-Outdoor Unit
10. Upper Current Limitation Mode
EEPROM setting in outdoor unit
EEPROM setting in outdoor unit
CODE: 1A
CODE: 1E
Setting No.
0
No display
1
2
Information is displayed when input of demand control is set (factory preset mode).
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 (factory preset mode)
70
Interval of “5”
70 (factory preset mode)
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”.
2WAY SYSTEM
Control Functions
10. Demand Control
2WAY SYSTEM
Control Functions-Outdoor Unit
10. Upper Current Limitation Mode
(4) When Using Demand Terminal Block
Demand terminal block must be connected in order to perform the demand control.
(It is also possible to connect the optional Seri-Para I/O unit (optional CZ-CAPDC2) and setup the system.)
The current limitation values can be set by changing either contact.
* The rated current indicates the current value that is listed in the catalog or service manual.
* XX and YY are able to set in EEPROM of outdoor unit.
Check " (3) Serial-parallel I/O " section.
During setting in LV1 - LV3,
[CZ-RTC4]
*
*
In respect of connection method for demand terminal block and Seri-Para I/O unit, refer to the installation
instructions supplied with the unit.
It is also possible to make setting that the display (symbol of demand-activated) is concealed as shown in the
following table.
: Input present
: Input not present
Seri-Para I/O unit
Demand terminal block
COM short circuit
Non
LV1
LV2
LV3
Contact 1 Contact 2
No control
Operates to XX% of the upper
limit for the rated current
Operates to YY% of the upper
limit for the rated current
Control
Forced thermostat OFF setting
Demand meaning
Operates to the maximum capacity.
Current is limited to the set values.
Current is limited to the set values.
SM830244-00_2WAY_7-Series.indb 34
15/10/05 14:36:03
[CZ-RTC5A / CZ-RTC5B] (demand-activated) displays on the
remote controller of the indoor unit.
LV3 LV2 LV1 COM
Demand
LV3 LV2 LV1 COM
Terminal block
DRED (Demand controller)
Relay contact point: No voltage relay
Current input is DC 24 V 10 mA
Use a very small electric current contact point for the relay.
SM830258-01_欧州向け_1fan_mini_VRF.indb 29
18/03/06 9:09:52
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