Heat pump 50Hz/R410A
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2. Guideline for each installation process
Part 3 Design and installation
2.5 Electrical Work 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 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
Do not operate the air conditioner until the refrigerant piping work is completed.
(Operating the air conditioner before the refrigerant piping work is completed may damage the compressor.)
• Install an earth leakage circuit breaker.
Since this is a inverter air conditioner. In order to prevent malfunction of the earth leakage breaker itself, use a breaker
resistant to higher harmonics.
• After finishing the electric work, confirm that each electric part and terminal inside the electric parts box is connected
securely.
CAUTION
If there are any possibilities that small animals or
insects enter the system through the knock holes, plug
the holes with packing materials (to be prepared onsite).
Burr
Use a conduit for the cable
• Outside the unit, make sure the thin signal cable (i.e. for the remote control, between units, etc.) and the thick electric
wiring do not pass near each other, and the shield signal cable, is recommended.
Otherwise, the outdoor unit may be affected by electrical noise (external noise), and malfunction or fail.
• Secure the wiring with the accessory clamps so that it does not touch the piping.
• Make sure the wiring and the electric parts box cover do not stick up above the structure, and close the cover firmly.
• Only professional electricians having sufficient knowledge should perform the electrical wiring work.
Perform the electrical wiring work in accordance with the electrical wiring diagram.
Make sure to set OFF the branch switch and over current breaker before starting the work.
• Install an earth leakage breaker.
• Perform grounding to the indoor units and outdoor units.
• Do not connect the ground wire to gas pipes, sewage pipes, lightning rods telephone ground wires.
• Gas pipes ···· Can explode or catch fire if gas leaks.
• Sewage pipes···· Provides no grounding effect if hard plastic pipes are used.
• Telephone ground wires and lightening rods ···· dangerous when struck by lightening due to abnormal rise in the ele
trical potential in the ground.
NOTE
