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Step 6: Insulation of refrigerant pipe
• Refrigerant gas pipe surface temperature can reach 110 °C. Make sure the chosen insulation material
can withstand this temperature.
• Insulating pipe should be made of polyethylene foam with a heat transfer rate of 0.041 to
0.052W/mK (0.035 to 0.045kca/(mh°C).
• Use separate thermal insulation pipes for gas and liquid refrigerant pipes.
• Provide insulation dimensions as per following chart:
Gas side
Liquid side
Gas pipe
thermal insulation
Liquid pipe thermal
insulation
O.D. 9.55 mm
O.D. 6.4 mm
I.D. 12-15 mm
I.D. 8-10 mm
Thickness 0.8 mm
Thickness 10 mm minimum
Inter-unit wiring
Gas pipe
Liquid pipe
Liquid pipe insulation
Gas pipe insulation
Finising tape
Step 7: Make electrical connections
• Lift the sensor securing plate and remove the front metal plate cover.
• Remove the wire retainer; connect the power connection wire to the wiring terminal according to
the color; tighten the screw and then fix the power connection wire with wire retainer. After finishing
wiring, clamp the grounding wire (yellow-green wire) into the wire-crossing groove as shown in the
following figure, in order to avoid pressing the wire when closing the electric box cover.
Sensor securing
plate
Terminal block
Electrical
component
box
Wire retainer
Front metal
plate cover
Firmly fix the wires with
the terminal screws
Firmly fix the wires
with the
terminal screws
When wire length
exceeds 10m,
use 2.0 mm
diameter wires
Shape wires so
that the front metal
plate cover will fit
securely
Firmly secure
wire retainer
so that wires
sustain no
external stress
Use the specified
wire type
• Put the front metal plate cover and the sensor securing plate back.
Outdoor unit
Indoor unit
