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SiEN34-705
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 system 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
1. Mark each outdoor unit with a code.
a System List
2. Add field settings and data for outdoor units, and outdoor unit No. if using sequential start.
3. Add the model number of each indoor unit connected to each refrigerant circuit.
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 VRV III R-410A Heat Pump, Cooling Only 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
(code)
Cool/Heat
selector:
Indoor unit
Low noise
operation
(L.N.O.P):
RX(Y)Q16P
Individual control
(PAC1)
Sequential start:
ON Defrost:
Earlier
Sequential start
No.
Cool/Heat
selector:
Indoor unit
Low noise
operation
(L.N.O.P):
RX(Y)Q18P
Individual control
(PAC2)
Sequential start:
ON Defrost:
Earlier
For details on field settings and centralized control group No., refer to the installation manual
and system reference materials.
General Information
Model Name System Name
FXCQ32M
2F01
FXSQ63M
2F02
FXCQ40M
2F03
FXHQ63MA
2F04
FXCQ50M
2F05
FXSQ32M
3F01
FXCQ40M
3F02
FXSQ40M
3F03
FXCQ50M
3F04
Points to Bear in Mind at the System Design
Indoor Unit
Remote
Location
Control Group
Control Group
2nd floor
A
office
2nd floor
A
office
2nd floor
A
office
2nd floor
B
office
2nd floor
B
office
3rd floor
C
office
3rd floor
C
office
3nd floor
C
office
3rd floor
D
office
Centralized
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
Optional
17
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