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Si33-102.book Page 10 Tuesday, June 26, 2001 3:18 PM
Points to Bear in Mind at the System Design
2.4.2 Main Considerations in Preparation of Control Circuit Diagrams
In addition to the design of the appropriate this system configuration it is also essential that the control
stsyem be made amply clear. If the system is designed and installed without a clear, comprehensive plan
then problems are inevitably going to occur during the test run.
Servicing too will become much more time consuming than necessary. However, if control circuit diagrams
are prepared along with the contract drawings in order to make the total system clearly visible then the
essential points relating to the electrical connections will be easily understood, the test run will go off
without a hitch and the whole system will be rendered fully effective.
Step 1: Compiling a 1. Mark each outdoor unit with a code.
System List
2. Add field settings and data for outdoor units, and outdoor unit No. if using sequential start.
(example using 3. Add the model number of each indoor unit connected to each refrigerant circuit.
Inverter K Series)
4. Assign each indoor unit a code.
5. Fill in the location of each indoor unit.
6. Group indoor units controlled by one or two remote controls. (group or individual control).
7. Assign central group Nos. if using centralized control.
8. Add field settings and optional equipment for indoor units.
9. Add unit No. if making separate field settings for each indoor unit under group control.
Note: With the R-22 PLUS Series, unit No. is determined through automatic addressing, therefore readout unit
Nos. after activating the power.
Example: System list
Outdoor Unit
Model Name
Field Settings Model Name System Name
(code)
Cool/Heat
FXYC32K
selector:
Indoor unit
Low noise FXYC63K
operation
(L.N.O.P):
RSXY16KA
FXYC40K
Individual control
(PAC1)
Sequential start:
ON Defrost:
FXYC63K
Earlier
Sequential start
FXYC50K
No.
Cool/Heat
FXYC32K
selector:
Indoor unit
Low noise FXYC40K
operation
(L.N.O.P):
RSXY18KA
FXYC50K
Individual control
(PAC2)
Sequential start:
ON Defrost:
FXYC50K
Earlier
For details on field settings and centralized control group No., refer to the installation manual and system
reference materials.
10
Indoor Unit
Centralized
Remote
Location Control Group
Control Group
2nd floor
2F01 A
office
2nd floor
2F02 A
office
2nd floor
2F03 A
office
2nd floor
2F04 B
office
2nd floor
2F05 B
office
3rd floor
3F01 C
office
3rd floor
3F02 C
office
3nd floor
3F03 C
office
3rd floor
3F04 D
office

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SiE33-102
Optional
Unit No. equipment, field
No. settings, etc.
1–00
(1–00)
(1–00)
1–01
(1–01)
1–02
(1–02)
(1–02)
1–03
General Information