• VRV
®
Systems • Installation procedure
17
• Installation procedure
1
Installation of outdoor
1 - 7 Field wiring
1 - 7 - 4
Examples
[Setting the cool/heat operation type]
1
Performing cool/heat setting with the remote controller connected to the indoor unit.
Keep the COOL/HEAT selector switch (DS1) on the outside unit PC board (A1P) at the factory setting position OFF.
햲
Remote controller
2
Performing cool/heat setting with the COOL/HEAT selector.
Connect the COOL/HEAT selector (optional) to the A/B/C terminals and set the COOL/HEAT selector switch (DS1) on the outside unit PC board
(A1P) to ON.
햲
COOL/HEAT selector
•
For the above wiring, always use sheathed vinyl cords with 0.75 to 1.25 mm2 or cables (2 core wires). (3 core wire are allowable for the COOL/
HEAT selector only.)
•
All transmission wire is field supply.
•
If the following limits should be exceeded, be careful that any abnormal transmission may be caused;
Maximum wiring length ................................1000 m or less
Total wiring length .......................................2000 m or less
Maximum branching ....................................16 branching or less
Wire length between outside unit ................30 m or less
•
Never connect power supply to any connection wiring and its terminal block, otherwise the entire system may be damaged.
•
Up to 16 branches are possible for transmission wiring. However no branch is allowed after branch.
햲
Branch
햳
Branch after branch
•
The wiring to the indoor units must be connected to the F1/F2 (To IN/D UNIT) terminals on the PC board in the outside unit.
To indoor unit
On
Off
O
u
t
On
Off
O
u
t
