46
5. For wire stripping and connection requirement, refer to the diagram below.
6. Secure the power supply cord and connecting cables onto the control board with the holder.
7. Attach the control board cover back to the original position with screw.
This equipment must be properly earthed.
Note: Isolating Devices (Disconnecting means) should have minimum 3.0 mm contact gap.
Earth wire shall be Yellow/Green (Y/G) in colour and longer than other AC wires for safety reason.
10.2.6 Heat
Insulation
Use a material with good heat-resistant properties as the heat insulation for the
pipes. Be sure to insulate both the gas-side and liquid-side pipes. If the pipes are
not adequately insulated, condensation or water leakages may occur.
Liquid-side pipes Material shall
withstand
120°C or higher
Gas-side pipes
CUTTING AND FLARING THE PIPING
1. Please cut using pipe cutter and then remove the burrs.
2. Remove the burrs by using reamer. If burrs is not removed, gas leakage may be caused.
Turn the piping end down to avoid the metal powder entering the pipe.
3. Please make flare after inserting the flare nut onto the copper pipes.
CU-3E23***, CU-3RE18***
Colour of wires (Connection cable)
(Power supply cord)
Terminals on the indoor unit
Terminals on the outdoor unit
Terminals on the isolating devices
(Disconnecting means)
(UNIT A)
(UNIT B)
1
1
1
1
L
(L)
2
2
2
2
N
(N)
3
3
3
3
(UNIT C)
1
1
2
2
3
3
p
CU-3E23***, CU-3RE18***
Indoor & outdoor
connection cable
Unit A
Unit B
Unit C
Power Supply
Cord
Isolating
Devices
Indoor
Unit A
Indoor
Unit C
Indoor
Unit B
Wire stripping
(gap between
wires)
No loose strand when
inserted
Indoor/outdoor
connecting
terminal board
10
±
1
mm
Conductor fully
inserted
Conductor over
inserted
Conductor not
fully inserted
ACCEPT
PROHIBITED
PROHIBITED
WIRE STRIPPING AND CONNECTING REQUIREMENT
5 mm
or more
1. To cut
■
Improper flaring
■
Inclined Surface
damaged
Cracked Uneven
thickness
Bar
Red arrow mark
Handle
Core
Yoke
Clamp
handle
Bar
0 – 0.5 mm
Copper pipe
When properly flared, the internal surface
of the flare will evenly shine and be of
even thickness. Since the flare part comes
into contact with the connections, carefully
check the flare finish.
Reamer
2. To remove burrs
3. To flare
Point down
Pipe
