10
6-3 SELECTOIN OF PIPE CONNECTION SIZE
Table 3 <Indoor and BS Unit Connection Piping Sizes>
Note: The piping size for the BS unit indicates the size of the connection side with the indoor unit.
Table 4 < Selection of Piping Size Based on Total Capacity of Indoor Unit >
See the section on “2-4 COMBINATION” at page 5 for details on indoor unit capacity.
6-4 PIPING CONNECTION
7. ELECTRIC WIRING WORK
7-1 GENERAL INSTRUCTIONS
•
All field supplied parts and materials, electric works must conform to local codes.
•
Use copper wire only.
•
Follow the “WIRING DIAGRAM” attached to the unit body to wire the outdoor unit and indoor units.
•
All wiring must be performed by an authorized electrician.
•
This system consists of multiple BS units. Mark each BS unit as unit A, unit B . . . , and be sure the terminal
board wiring to the outdoor unit and indoor unit are properly matched. If wiring and piping between the out-
door unit, BS unit and an indoor unit are mismatched, the system may cause a malfunction.
•
A circuit breaker capable of shutting down the power supply to the entire system must be installed.
•
Always ground wires. (In accordance with national regulations of the pertinent country.)
Target unit
Piping size (outer diameter) (in.)
Gas pipe
Liquid pipe
Indoor unit’s model No.
09, 12, 18
1/2
1/4
24, 30, 36, 48
5/8
3/8
BS unit
BSVQ36MVJU
5/8
3/8
BSVQ60MVJU
Total capacity of indoor units
[×10
3
Btu/h]
Piping size (outer diameter) (in.)
Upstream
Downstream
Suction gas pipe
Discharge gas pipe
Liquid pipe
Gas pipe
Liquid pipe
Up to 24
1/2
3/8
1/4
1/2
1/4
24 or more and less than 60
5/8
1/2
3/8
5/8
3/8
