Special Precautions When Dealing With R410A Unit - Daikin C-Serie Installationshandbuch

• All wires must be firmly connected.
• Make sure all the wires do not touch the refrigerant pipings, compressor or any moving parts.
• The connecting wire between the indoor unit and the outdoor unit must be clamped by using
provided cord anchorage.
• The power supply cord must be equivalent to H07RN-F which is the minimum requirement.
• Make sure no external pressure is applied to the terminal connectors and wires.
• Make sure all the covers are properly fixed to avoid any gap.
• Use round crimp-style terminal for connecting wires to the power supply terminal block. Connect
the wires by matching to the indication on terminal block. (Refer to the wiring diagram attached
on the unit).
• Use the correct screwdriver for terminal screws tightening. Unsuitable screwdrivers can damage
the screw head.
• Over tightening can damage the terminal screws.
• Do not connect wire of different gauge to same terminal.
• Keep wiring in an orderly manner. Prevent the wiring from obstructing other parts and the
terminal box cover.
Connect wires of the
same gauge to both side.

SPECIAL PRECAUTIONS WHEN DEALING WITH R410A UNIT

R410A is a new HFC refrigerant which does not damage the ozone layer. The working pressure of this new
refrigerant is 1.6 times higher than conventional refrigerant (R22), thus proper installation / servicing is
essential.
• Never use refrigerant other than R410A in an air conditioner which designed to operate with R410A.
• POE or PVE oil is used as lubricant for R410A compressor, which is different from the mineral oil used
for R22 compressor. During installation or servicing, extra precaution must be taken not to expose the
R410A system too long to moist air. Residual POE or PVE oil in the piping and components can absorb
moisture from the air.
• To prevent mischarging, the diameter of the service port on the flare valve is different from that of R22.
• Use tools and materials exclusively for refrigerant R410A. Tools exclusively for R410A are manifold
valve, charging hose, pressure gauge, gas leak detector, flare tools, torque wrench, vacuum pump and
refrigerant cylinder.
• As an R410A air conditioner incurs higher pressure than R22 units, it is essential to choose the copper pipes
correctly. Never use copper pipes thinner than 0.8mm even though they are available in the market.
• If the refrigerant gas leakage occurs during installation / servicing, be sure to ventilate fully. If the refrigerant
gas comes into contact with fire, a poisonous gas may occur.
• When installing or removing an air conditioner, do not allow air or moisture to remain in the refrigerant
cycle.
1 IM 5CKC-0912(0)DAIKIN-EN.indd 15 1 IM 5CKC-0912(0)DAIKIN-EN.indd 15
Attach insulation sleeve
Round crimp-style terminal
Do not connect wires of the
same gauge to one side.
1-15
Electric wire
Do not connect wires of
different gauges.
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