Mitsubishi Electric MXZ-2D42VA Notice D'installation page 4

1-6. DRAIN PIPING FOR OUTDOOR UNIT
Please perform the drain piping work only when draining from one place.
) Provide drain piping before indoor and outdoor piping connection.
2) Connect the soft PVC hose (L) I.D.5 mm as shown in the illustration.
3) Make sure to provide drain piping with a downhill grade for easy drain flow.
Note:
Install the unit horizontally.
Do not use the drain socket () in the cold regions. Drain may freeze and it makes
the fan stop.
The outdoor unit produces condensate during the heating operation. Select the in-
stallation place to ensure to prevent the outdoor unit and/or the grounds from being
wet by drain water or damaged by frozen drain water.
2. OUTDOOR UNIT INSTALLATION
2-1. CONNECTING WIRES FOR OUTDOOR UNIT
) 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. Af-
ter 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 3-2. 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
3. FLARING WORK AND PIPE CONNECTION
3-1. FLARING WORK
) Cut the copper pipe correctly with pipe cutter. (Fig. , 2)
2) Completely remove all burrs from the cut cross section of pipe. (Fig. 3)
• Aim the copper pipe downward while removing burrs to prevent
burrs from dropping in the pipe.
3) Remove flare nuts attached to indoor and outdoor units, then put them
on pipe having completed burr removal. (Not possible to put them on
after flaring work.)
4) Flaring work (Fig. 4, 5). Firmly hold copper pipe in the dimension
shown in the table. Select A mm from the table according to the tool
selected.
5) Check
• Compare the flared work with Fig. 6.
• If flare is noted to be defective, cut off the flared section and do flar-
ing work again.
Pipe diameter Nut
Clutch
(mm) (mm)
type tool
for R40A
ø6.35 (/4") 7
ø9.52 (3/8") 22
0 to 0.5
ø2.7 (/2") 26
ø5.88 (5/8") 29
En-3
<OUTDOOR UNIT>
Terminal block for
Terminal block
power supply
POWER SUPPLY
~/N 230 V 50 Hz
UNIT
UNIT
<INDOOR UNIT>
A (mm) Tightening torque
Clutch Wing nut
type tool type tool N•m
for R22 for R22
3.7 to 7.7 40 to 80
.5 to 2.0
34.3 to 4.2 350 to 420
.0 to .5
49.0 to 56.4 500 to 575
2.0 to 2.5
73.5 to 78.4 750 to 800
() Drain socket
5 mm
35 mm
Lead wire
Copper pipe
Burr
Spare reamer
Pipe cutter
kgf•cm
Die
Flare nut
(L) Soft PVC hose
Terminal block for power supply
Service panel
• Be sure to attach each screw to its
correspondent terminal when secur-
ing the cord and/or the wire to the
terminal block.
• Make earth wire a little longer than
others. (More than 35 mm)
• For future servicing, give extra length
to the connecting wires.
No good
Good
Copper
pipe
Tilted Uneven Burred
Fig. 
Flaring tool
Clutch type Wing nut type
Fig. 3
Inside is shin-
ing without any
Smooth all
scratches.
around
Copper pipe
Even length
all around
Fig. 5
Fig. 2
Fig. 4
Fig. 6