Flaring Work And Pipe Connection - Mitsubishi Electric MXZ-2F33VF Instruction Manual

2. OUTDOOR UNIT INSTALLATION
2-1. CONNECTING WIRES FOR OUTDOOR UNIT
1) Remove the service panel.
2) Loosen terminal screw, and connect indoor/outdoor unit connecting wire
(B) from the indoor unit correctly on the terminal block. Be careful not
to make mis-wiring. Fix the wire to the terminal block securely so that
no part of its core is appeared, and no external force is conveyed to the
connecting section of the terminal block.
3) Firmly tighten the terminal screws to prevent them from loosening. After
tightening, pull the wires lightly to confirm that they do not move.
4) Perform 2) and 3) for each indoor unit.
5) Connect power supply cord (A).
6) Fix indoor/outdoor unit connecting wire (B) and power supply cord (A)
with the cable clamps.
7) Close the service panel securely. Make sure that 3-3. PIPE CONNEC-
TION is completed.
• After making connections between both power supply cord (A) and indoor/
outdoor unit connecting wire (B), be sure to fix both cable and wire with
cable clamps.
Indoor/outdoor unit connecting wire
Terminal block
UNIT
<INDOOR UNIT>

3. FLARING WORK AND PIPE CONNECTION

3-1 PRECAUTIONS FOR DEVICES THAT USE R32 REFRIGERANT
• Use ester oil, ether oil, alkylbenzene oil (small amount) as the refrigeration oil applied to the flared sections.
• Use C1220 copper phosphorus, for copper and copper alloy seamless pipes, to connect the refrigerant pipes. Use refrigerant pipes with the thicknesses
specified in the table to the below. Make sure the insides of the pipes are clean and do not contain any harmful contaminants such as sulfuric compounds,
oxidants, debris, or dust.
Always apply no-oxidation brazing when brazing the pipes, otherwise, the compressor will be damaged.
WARNING:
When installing or relocating, or servicing the air conditioner, use only the specified refrigerant (R32) to charge the refrigerant lines. Do not mix it
with any other refrigerant and do not allow air to remain in the lines.
If air is mixed with the refrigerant, then it can be the cause of abnormal high pressure in the refrigerant line, and may result in an explosion and
other hazards.
The use of any refrigerant other than that specified for the system will cause mechanical failure or system malfunction or unit breakdown. In the
worst case, this could lead to a serious impediment to securing product safety.
Pipe size
ø6.35 ø9.52 ø12.7
(mm)
Thickness
0.8 0.8 0.8
(mm)
• Do not use pipes thinner than those specified above.
• Use 1/2 H or H pipes if the diameter is 19.05 mm or larger.
• Be sure to have appropriate ventilation in order to prevent ignition. Furthermore, be sure to carry out fire prevention measures that there are no dangerous
or flammable objects in the surrounding area.
<OUTDOOR UNIT>
Terminal block for
power supply
POWER SUPPLY
~/N 220-230-240 V
UNIT
50 Hz
ø15.88 ø19.05 ø22.2 ø25.4
1.0 1.0 1.0 1.0
Service panel
15 mm
• Be sure to attach each screw to its
35 mm
• Make earth wire a little longer than oth-
Lead wire
• For future servicing, give extra length
ø28.58
1.0
Terminal block for power supply
correspondent terminal when securing
the cord and/or the wire to the terminal
block.
ers. (More than 35 mm)
to the connecting wires.
En-6