Outdoor Unit Installation - Mitsubishi Electric MSZ-HR25VF Installation Manual

3. OUTDOOR UNIT INSTALLATION

1-4. INSTALLATION DIAGRAM
3-1. CONNECTING WIRES FOR THE OUTDOOR UNIT
ACCESSORIES
1) Open the service panel.
Check the following parts before installation. 2) Loosen terminal screw, and connect indoor/outdoor unit connecting wire (A) from the
<Indoor unit> indoor unit correctly on the terminal block. Be careful not to make mis-wiring. Fix the wire
(1) Installation plate 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.
Installation plate fixing screw
(2)
4 × 25 mm
3) Firmly tighten the terminal screws to prevent them from loosening. After tightening, pull
(3) Wireless remote controller the wires lightly to confirm that they do not move.
4) Connect power supply cord (K).
Felt tape
(4)
(For left or left-rear piping)
5) Fix indoor/outdoor unit connecting wire (A) and power supply cord (K) with the cord clamp.
6) Close the service panel securely. (5) Battery (AAA) for (3)
<Outdoor unit>
(6) Drain socket
15 mm
35 mm
100 mm
15 mm
or more
35 mm
Others
Earth wire
Indoor/outdoor unit
connecting wire (A)
(2)
• Make earth wire longer than others as picture.
• For future servicing, give extra length to the connecting wires.
• Be sure to attach each screw to its correspondent terminal when securing the cord
and/or the wire to the terminal block.
3-2. FLARING WORK
1) Cut the copper pipe correctly with pipe cutter. (Fig. 1, 2)
2) Completely remove all burrs from the cut cross section
of pipe. (Fig. 3)
• Put the end of the copper pipe to downward direction
as you remove burrs in order to avoid to let burrs drop
in the piping.
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
(5)
according to the tool you use.
5) Check
• Compare the flared work with Fig. 6.
• If flare is noted to be defective, cut off the flared sec-
tion and do flaring work again.
Copper pipe
Burr
Spare reamer
Pipe cutter
Fig. 3
Copper pipe
Die
Flare nut
Fig. 5
*2 When front and sides of unit are clear, 100 mm or more
*3 When any 2 sides of left, right and rear of unit are clear,
HR25, 35 : 100 mm or more
HR42, 50 : 200 mm or more
*4 The manufacturing year and month is indicated on the spec name plate.
Appearance of the outdoor unit may differ from some models.
IMPORTANT NOTES
Check that cabling will not be subject to wear, corrosion, excessive pressure,
vibration, sharp edges or any other adverse environmental effects. The check
shall also take into account the effects of aging or continual vibration from
sources such as compressors or fans.
PARTS TO BE PROVIDED AT YOUR SITE
1 (A) Indoor/outdoor unit connecting wire*1
(B) Extension pipe
5
(C) Wall hole sleeve
1
(D) Wall hole cover
(E) Pipe fixing band
1
(F) Fixing screw for (E) 4 × 20 mm
2
(G) Piping tape
(H) Putty
Drain hose
1
(I) (or soft PVC hose, 15 mm inner
Power supply cord (K)
diameter or hard PVC pipe VP30)
Drain hose
(J) (or soft PVC hose, 15 mm inner
diameter or hard PVC pipe VP16)
(K) Power supply cord*1
Terminal block
Power supply cord (K)
(1)
Cord clamp
(D)
(C)
(G)
Fig. 1
(E)
Good
(3)
(F)
Tilted Uneven Burred
Fig. 2
Flaring tool
*4
Clutch type
Fig. 4
(K)
Inside is shin-
Smooth all
ing without any
around
scratches.
(B)
(A)
Even length
Fig. 6
all around
Pipe diameter
(mm)
Note:
1
*1 Place indoor/outdoor unit connecting wire (A) and
1
ø6.35 (1/4")
power supply cord (K) at least 1 m away from the TV
1
antenna wire.
1
ø9.52 (3/8")
2 to 5
This indoor unit is equipped with the built-in Wi-Fi interface. (VFK type only)
2 to 5
ø12.7 (1/2")
1
1
ø15.88 (5/8")
1
3-3. PIPE CONNECTION
0 or 1
• Fasten flare nut with a torque wrench as specified in the table.
• When fastened too tight, flare nut may break after a long period and cause refrigerant
1
leakage.
• Be sure to wrap insulation around the piping. Direct contact with the bare piping may
Be sure to use wall hole sleeve (C)
result in burns or frostbite.
to prevent indoor/outdoor connect-
• Use flared nut installed to this indoor unit.
ing wire (A) from contacting metal
parts in the wall and to prevent
Indoor unit connection
damage by rodents in case the
Connect both liquid and gas pipings to indoor unit.
wall is hollow.
• Do not apply refrigeration oil on screw threads. Excessive tightening torque will result in
damage on the screw.
• For connection, first align the center, then tighten the first 3 to 4 turns of flare nut by hand.
• Use tightening torque table above as a guideline for indoor unit side union joint section,
and tighten using two wrenches. Excessive tightening damages the flare section.
When the piping is to be attached to a wall containing metals (tin plated) or metal
netting, use a chemically treated wooden piece 20 mm or thicker between the
wall and the piping or wrap of insulation vinyl tape around the piping.
Copper
To use existing piping, perform COOL operation for 30 minutes and pump
pipe
down before removing the old air conditioner. Remake flare according to the
dimension for new refrigerant.
Tighten the flare nut
with a torque wrench.
Cover the connection part with tape to prevent water from leaking.
No good
Outdoor unit connection
Connect pipes to stop valve pipe joint of the outdoor unit in the same manner applied for
To avoid risk of fire, embed or protect the refrigerant piping.
indoor unit.
External damage on the refrigerant piping can be cause of fire.
• For tightening, use a torque wrench or spanner and use the same tightening torque
applied for indoor unit.
Do not block the inlet of the outdoor unit with the excess part of the pipes.
Outdoor unit installation (HR25, 35)
121 mm
Wing nut type
(I)
2-10.3 mm × 19.3 mm slot
When installing the unit, securely connect the refrigerant pipes before starting
the compressor.
3-4. INSULATION AND TAPING
1) Cover piping joints with pipe cover.
2) For outdoor unit side, surely insulate every piping including valves.
(6)
3) Using piping tape (G), apply taping starting from the entry of outdoor unit.
• Stop the end of piping tape (G) with tape (with adhesive agent attached).
• When piping have to be arranged through above ceiling, closet or where the tempera-
Note:
ture and humidity are high, wind additional commercially sold insulation to prevent
Install the unit horizontally.
condensation.
Do not use drain socket (6) in cold regions. Drain may freeze and make the
fan stop.
The outdoor unit produces condensate during the heating operation. Select
the installation place to ensure to prevent the outdoor unit and/or the grounds
from being wet by drain water or damaged by frozen drain water.
A (mm)
Clutch
Nut
Clutch Wing nut
type tool
(mm) type tool type tool
for R32,
for R22 for R22
R410A
17
1.5 to 2.0
22
0 to 0.5 1.0 to 1.5
26
2.0 to 2.5
29
Indoor unit
Wall hole
sleeve (C)
Cut off the
extra length.
After the leak test, apply insulating material tightly
so that there is no gap.
5 mm or less
Flare nut Union joint
Internal thread side External thread side
Grip the nut on the
union joint with a spanner.
WARNING
Outdoor unit installation (HR42, 50)
699 mm
500 mm
Air inlet
Air outlet
WARNING
40 mm
2-10.3 mm × 21 mm slot
Drain piping for outdoor unit
• Provide drain piping before indoor and outdoor pip-
ing connection.
• Connect drain hose (J) I.D.15 mm as shown in the
illustration.
(J)
• Make sure to provide drain piping with a downhill
grade for easy drain flow.
Tightening torque
N•m kgf•cm
13.7 to 140 to
17.7 180
34.3 to 350 to
41.2 420
49.0 to 500 to
56.4 575
73.5 to 750 to
78.4 800
Wall hole cover (D)
Seal the wall hole
gap with putty (H).
Fix the pipe to wall
with pipe fixing band
(E).
Pipe fixing band (E)
Fixing screw (F)
800 mm
150 mm
500 mm
Air inlet
Air outlet
40 mm