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Si39-303 Field Wiring
Installation Manual 189
Precautions when knocking out knock holes
!
To punch a knock hole, hit on it with a hammer.
!
After knocking out the holes, we recommend you paint the edges and areas around the
edges using the repair paint to prevent rusting.
!
When passing electrical wiring through the knock holes, remove any burrs from the knock
holes and wrap the wiring with protective tape to prevent damage.
Caution
!
Use a power wire pipe for the power wiring.
!
Outside the unit, make sure the weak electric wiring (i.e. for the remote control, between
units, etc.) and the strong electric wiring do not pass near each other, keeping them at least
50 mm apart. Proximity may cause electrical interference, malfunctions, and breakage.
!
Be sure to connect the power wiring to the power wiring terminal block and secure it as
described in 7-4 Field line connection.
!
Inter-unit wiring should be secured as described in 7-4 Field line connection.
• Secure the wiring with the accessory clamps so that it does not touch the piping.
• Make sure the wiring and the electric box lid do not stick up above the structure, and close
the cover firmly.
Never connect 200V to the terminal block of the interconnecting wiring. Doing so will break the
entire system.
!
The wiring from the indoor units must be connected to the F1/F2 (In-Out) terminals on the
PC board in the outdoor unit.
!
After installing the interconnecting wires inside the unit, wrap them along with the onsite
refrigerant pipes using finishing tape, as shown below.
For the above wiring, always use vinyl cords with 0.75 to 1.25 mm
2
sheath or cables (2 core
wires). (3 core wire cables are allowable for the cooler/heater changeover remote controller
only.)
If there are any possibilities that
small animals enter the system
through the knock holes,
plug the holes with packing
materials (to be prepared onsite).
Burr
Knockout hole
1
2
3
4
5
1. Liquid pipe
2. Gas pipe
3. Interconnecting wiring
4. Insulator
5. Finishing tape