Page 1
HFC
utilized
R410A
CONTENTS
1. THE FOLLOWING SHOULD ALWAYS BE OBSERVED FOR
SAFETY ........................................................................................... 2
2. SELECTING THE INSTALLATION LOCATION ............................... 2
3. INSTALLATION DIAGRAM & ACCESSORIES................................ 3
4. INDOOR UNIT INSTALLATION ....................................................... 4
5. OUTDOOR UNIT INSTALLATION ................................................... 9
6. INDOOR/OUTDOOR UNIT CONNECTION FINISHING AND
TEST RUN ..................................................................................... 10
7. FOR MOVEMENT AND MAINTENANCE...................................... 13
English
Page 2
2
330 mm
360 mm
500 mm
840 mm
Caution
■ Perform the drainage/piping work securely
according to the installation manual.
If there is a defect in the drainage/piping work,
water could drop from the unit and household
goods could be wet and damaged.
■ Fasten a flare nut with a torque wrench as
specified in this manual.
When fastened too tight, a flare nut may broken
after a long period and cause a leakage of refrigerant.
Warning
2. SELECTING THE INSTALLATION LOCATION
2-1 INDOOR UNIT
• Where airflow is not blocked.
• Where cool air spreads over the entire room.
• Maximum refrigerant piping length between indoor unit and outdoor unit is 25 m and the difference of height
of both units is 10 m.
• Rigid wall or ceiling without vibration.
• Where it is not exposed to direct sunshine.
• Where easily drained.
• At a distance 1 m or more away from your TV and radio. Operation of the air conditioner interferes with radio
or TV reception in areas where reception is weak. An amplifier may be required for the affected device.
• In a distance as far as possible from fluorescent and incandescent lights (so the infrared remote control can
operate the air conditioner normally).
• Where the air filter can be removed and replaced easily.
2-2 WIRELESS REMOTE CONTROLLER MOUNTING
• Place of mounting
- Where it is easy to operate and easily visible.
- Where children cannot touch.
• Mounting
Select a position about 1.2 m above the floor, check that signals from the controller are surely received by
the indoor unit from that position (‘beep’ or ‘beep-beep’ receiving tone sounds), attach remote controller
holder 4 to a pillar or wall, then set the wireless remote controller 3.
In rooms where inverter type fluorescent lamps are used, the signal from the wireless remote controller may
not be received.
2-3 OUTDOOR UNIT
• Where it is not exposed to strong wind.
• Where airflow is good and dustless.
• Where it is not exposed to rain and direct sunshine.
• Where neighbours are not annoyed by operation sound or hot air.
• Where rigid wall or support is available to prevent the increase
of operational sound or vibration.
• Where there is no risk of combustible gas leakage.
• When installing the unit at a high level, be sure to fix the unit legs.
• Where it is at least 3 m away from the antenna of TV set or
radio. Operation of the air conditioner interferes with radio or
TV reception in areas where reception is weak. An amplifier
may be required for the affected device.
• Install the unit horizontally.
■ Perform the installation securely referring to
the installation manual.
Incomplete installation could cause a personal
injury due to fire, electric shock, the unit falling or
leakage of water.
■ Perform electrical work according to the installation manual and be sure to use an exclusive circuit.
If the capacity of the power circuit is insufficient
or there is incomplete electrical work, it could
result in a fire or an electric shock.
■ Attach the electrical part cover to the indoor
unit and the service panel to the outdoor unit
securely.
If the electrical part cover in the indoor unit and/
or the service panel in the outdoor unit are not
attached securely, it could result in a fire or an
electric shock due to dust, water, etc.
■ Be sure to use the part provided or specified
parts for the installation work.
The use of defective parts could cause an injury
or leakage of water due to a fire, an electric shock,
the unit falling, etc.
■ Be sure to cut off the main power in case of
setting up the indoor electronic control P.C.
board or wiring works.
It could cause an electric shock.
■ The appliance shall be installed in accordance
with national wiring regulations.
Air outlet
4-10 mm × 21 mm slot
Note:
It is advisable to make a piping loop near outdoor unit so as to reduce vibration transmitted from there.
Caution:
Avoid the following places for installation where air conditioner trouble is liable to occur.
• Where flammable gas could leak.
• Where there is much machine oil.
• Salty places such as the seaside.
• Where sulfide gas is generated such as a hot spring.
• Where there is high-frequency or wireless equipment.
Page 3
3
2
A
E
C
F
4
3
6
5
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 7 to 8 turns
of insulation vinyl tape around the piping.
Units should be installed by licensed contractor accordingly
to local code requirement.
500 mm or more
1000 mm or more
500 mm or more
ACCESSORIES
Check the following parts before installation.
<Indoor unit>
Item Q’ty
1 Installation plate 2
2 Unit fixing screw 5 × 12 mm 2
3 Wireless remote controller 1
4 Remote controller holder 1
5 Fixing screw for 4 3.5 × 16 mm (Black) 2
6 Battery (AAA) for remote controller 2
7 Drain hose 1
8 Drain pipe cover 1
9 Knockout cover 1
0 Screw for 9 4 × 10 mm 2
<Outdoor unit>
A Drain socket 1
B Drain cap 2
PARTS TO BE PROVIDED AT YOUR SIDE
Item Q’ty
A Refrigerant pipe 1 set
B Indoor/outdoor connecting wire (2-core 1.0 mm
2
)1
C Piping tape 1
D Drain pipe (PVC pipe : OD ø26) 1
E Pipe fixing band for refrigerant pipe
(The quantity depends on the pipe length.)
2 to 5
F Fixing screw for E
(The quantity depends on the pipe length.)
2 to 5
G Drain-joint pipe (PVC pipe : OD ø26, L=50 mm) 1
H Power supply cord 2
I Piping hole repair parts (Putty and Wall hole cover) 1
J Installation plate fixing bolt (M10) 4
K Nut, Spring washer for J (M10) 4 set
REFRIGERANT AND DRAIN PIPE SIZES
Refrigerant pipe
Liquid OD ø6.35
Gas OD ø15.88
Drain pipe Hard PVC pipe : OD ø26
OPTIONAL PARTS
Name Parts No.
Air cleaning filter MAC-1200FT
Deodorizing filter MAC-1700DF
Front grille
Accessories
Open as a rule 500 mm or
more if the front and both
sides are open
100 mm or more 200 mm
or more if there are obstacles to both sides
Open as a rule
500 mm or more if
the back, both
sides and top are
open
350 mm or more
100 mm or more
Page 4
4
4-1 A CASE OF SUSPENDING INDOOR UNIT FROM THE CEILING
4-1-(1) MOUNTING INSTALLATION PLATE FIXING BOLTS
4. INDOOR UNIT INSTALLATION
1. Determine the locations of installation plate fixing bolts.
• Use installation pattern to determine the locations of instal-
lation plate fixing bolts J.
a Installation pattern
Details are printed on pattern.
Attention: Surrounding temperature and humidity conditions
may cause paper pattern to shrink or expand.
(Measure dimensions before drilling holes.)
2. Suspension structure (Give site of suspension strong structure).
■ Wood structure
• Select tie beam (one-story houses) or second-floor
girder (two story houses) as reinforcement member.
• Use sturdy beams of at least 60 mm square for beam
pitch of 900 mm or less or of at least 90 mm square for
beam pitch of 900-1800 mm.
a Pitch b Ceiling
c Rafter d Bracket
e Roof beam
■ Ferroconcrete Structures
• Secure installation plate fixing bolts J as shown at the
right or use angle-stock bracework to install installation plate fixing bolts J.
f Use inserts rated at 100-150 kg each
g Steel reinforcing rod
J Installation plate fixing bolts
3. Installation plate fixing bolts pitch.
• Use the installation plate fixing bolts J M10 (× 4 procure
locally).
a Indoor unit b Air outlet
1 Installation plate
• Projecting dimension of installation fixing bolts J from hori-
zontal base line against which you fix installation plate 1
as within at the right.
c Horizontal base line 1 Installation plate
J Installation fixing bolts
a
*Remove installation pattern after installation.
b
c
d
e
a
a
b
a
1
300 mm
150 mm
1065 mm
f
J
g
c
J
1
max. 40 mm
Page 5
5
4-1-(4) FRONT GRILLE REMOVAL
• Remove front grille and transportation support.
4-1-(5) OPENING KNOCKOUT HOLE
• Remove knockout holes with hammering it.
4-1-(6) FIXING UNIT TO INSTALLATION PLATES
1. Suspending unit from installation plates.
• Hoist unit so that hanging bolt (4) on the sides of unit fit into holes in installation plates 1.
2. Securing unit to installation plates.
• Be sure to tighten unit fixing screw 2 to unit securely.
FRONT
Remove 3 screws
Transportation support
* After installing com-
pletely, please remove
this part because this is
used for transportation
only.
Front grille
Knockout hole
Knockout hole for drain pipe
Unit fixing screw 2
Unit fixing screw 2
Hanging bolt
• Be sure to set hanging bolt
in this position to keep
unit’s inclination.
1
1028 mm
1
a
J
a
K-1
K-2
1
K-2
K-3
1
K-2
K-3
J
a
(Fig. 1) (Fig. 2)
(Fig. 3) (Fig. 4)
a
1
b
c
0
115
188
132
124
0
Ø40
Ø75
a
(Fig. 5)
(unit : mm)
(unit : mm)
e
f
d
188
193
199
204
115
1550100
200
300
FRONT
Page 6
6
1028 mm
1065 mm
80 mm
95 mm
132 mm
300 mm
155 mm
Ø75
Ø75
* Remove installation pattern after installing.
Hole for refrigerant and drain pipe (in the case of
rear piping)
Installation plate 1
FRONT
4-2-(6) FIXING UNIT TO INSTALLATION PLATES
1. Suspending unit from installation plate.
• Hoist unit so that hanging bolt (4) on the sides of unit fit into holes in installation plate 1.
2. Securing unit to installation plates.
• Be sure to tighten unit fixing screw 2 to unit securely.
4-3 KNOCKOUT COVER
• After removing the knockout holes, attach knockout cover 9 on the knockout hold edge (shown as below).
Unit fixing screw 2
Installation plate 1
Hanging bolt
Hanging bolt
Unit fixing screw 2
• Be sure to set
hanging bolt in
this position.
Knockout
cover 9
Refrigerant
pipe
Drain pipe
Knockout
Knockout
Refrigerant
pipe
Drain pipe
Knockout
A CB
Refrigerant
pipe
Drain pipe
Page 7
7
1 Use care not to make mis-wiring.
2 Firmly tighten the terminal screws to prevent
them from loosening.
3 After tightening, pull the wires lightly to con-
firm that they do not move.
Loosen terminal screw
Terminal block
Connection details
2
or more, in conformity with Design 245 IEC 57
2
, in conformity with
Cable clamp
Screw
Terminal cover
Warning:
• Attach the electrical part cover securely. If it is attached incorrectly, it could result in a fire, an electric shock due to dust, water, etc.
• Use the specified indoor/outdoor unit connecting wire to connect the indoor and outdoor units and
fix the wire to the terminal block securely so that no stress is applied to the connecting section of
the terminal block. Incomplete connection or fixing of the wire could result in a fire.
• When connecting the power supply cord to the power supply source, be sure to connect each wire
to the correct pole. Be sure to connect the Live wire side to the L terminal and connect the Neutral
conductor side to the N terminal.
4-6 REFRIGERANT PIPE WORK
• Refrigerant pipes which are connected at side of indoor unit must be processed as below, and processed
figure will be differently made means of which the indoor unit is installed or which direction refrigerant pipes
are connected in.
1. In case that pipes are cut out from back surface of the indoor unit. (Fig. 1)
Process figure
(Fig. 1)
90°
R25 (R1"
) − R75 (R3"
)
110
90°
R15 − R50 (R2"
)
70
Refrigerant pipe
Refrigerant pipe
Flare nut
Flare nut
Refrigerant pipe (gas)
OD ø15.88
Refrigerant pipe (liquid)
OD ø9.52
Three core with
ground IEC cord
Power supply cord H
65 mm
15 mm
Indoor terminal block
Outdoor terminal block
3 N
3
N
Indoor/outdoor unit
connecting wire B
2-core 1.0 mm
2
L~N
~
Page 8
8
48°
R50 (R2"
) - R60
80
38°
R30 - R40 (R1.5")
80
Flare nut
Refrigerant pipe (gas)
OD ø15.88
Flare nut
Refrigerant pipe (liquid)
OD ø9.52
2. In case of connecting drain pipe D to drain-joint bush
through drain hose.
• Drain hose 7 which is contained in accessories is flexible,
so use it when drain pipe D should be alternated direction.
• Be sure to wind pipe cover which is provided in accessories around drain hose with vinyl tape.
• Cut VP-20 in dimension as shown at the right, and connect
drain-joint bush with drain hose with adhesive.
a Drain-joint bush
b Tape
c Adhesive
7 Drain hose
8 Drain pipe cover
D Drain pipe (VP-20)
G Drain-joint pipe (VP-20)
3. • Be sure that drain pipe D tilts downward (1/100 or more)
on outdoor side (drain side), and no traps or heaving exist.
• When the drain pipe D is relatively long, provide support
metal fixtures midway to eliminate waving.
• Odor trap at the end of drain pipe D is not required.
a Insulation
b Supporting metal fixture
c Downward inclination of 1/100 or more
d Air bleeder
e Do not raise
f Odor trap
g The end of drain hose is immersed in water
h Gap from the ground level is 50 mm or less
i Sewage ditch
b
c
a
0.75 m - 1.5 m
i
g
h
f
e
d
c
8
D
b
a
d
8
7
a
G
50 mm
8
a
G
b
7
D
c
c
b
a
30
Process figure
Page 9
9
N~L
~
35 mm
15 mm
10 m or less
15 m or less
25 m or less
2
or more, in conformity with Design 245 IEC 57.
2
or more, in conformity with Design 245 IEC 57.
2
or more, in conformity with Design 245 IEC 57.
2
, in conformity with Design 245 IEC 57.
Power supply cord H
Service panel
Fixing screws
Warning:
Be sure to attach the service panel of the outdoor unit securely. If it is not attached correctly, it could
result in a fire or an electric shock due to dust, water, etc.
Indoor terminal block
Outdoor terminal block
3 N
3
N
Indoor/outdoor unit
connecting wire B
2-core 1.0 mm
2
Be sure to put the left portion into the square hole of
the service panel.
Be sure to fix the indoor/outdoor
unit connecting wire B and power
supply cord H using this cord
clamp.
Remove two fixing
screws to open the
service panel.
Valve cover
Page 10
10
A
90°
R410A has high pressures beyond the measurement range of existing
gauges.
Port diameters have been changed to prevent any other refrigerant from
being charged into the unit.
Hose material and cap size have been changed to improve the pressure
resistance.
Clamp bar hole has been enlarged to reinforce the spring strength in the
tool.
Provided to prevent the back flow of oil. This adapter enables you to use
existing vacuum pumps.
It is difficult to measure R410A with a charging cylinder because the refrigerant bubbles due to high pressure and high-speed vaporization.
2. Burrs removal
• Completely remove all burrs from the cut cross section of
pipe.
• 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.
Copper pipe
Good
No good
Tilted
Uneven
Burred
3. Putting nut on
• 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)
• Flare nut for R410A pipe differs from R22 pipe. Refer to the
following table for detail.
Burr
Copper pipe
Spare
reamer
Pipe
cutter
4. Flaring work
• Carry out flaring work using flaring tool as shown below.
Flare nut
Copper pipe
• Firmly hold copper pipe in a die in the dimension shown in
the table above.
5. Check
• Compare the flared work with figure below.
• If flare is noted to be defective, cut off the flared section
and do flaring work again.
Die
Copper pipe
Flare nut
Die
Copper pipe
York
Flaring tool
Wing nut type
Clutch type
A (mm)
Outside Conventional flare tool
diameter Clutch type Wing nut type
ø6.35 mm 0 to 0.5 1.0 to 1.5 1.5 to 2.0
ø15.88 mm 0 to 0.5 1.0 to 1.5 2.0 to 2.5
Flare tool for
R410A clutch type
Smooth all around
Even length
all around
Inside is shining without any scratches.
mm inch R410A R22
ø6.35 1/4 17 17
ø15.88 5/8 29 27
Page 11
11
A
b
a
c
d
c
9
0
6-4 PURGING PROCEDURES · LEAK TEST
• Use the vacuum pump for air purging for the purpose of environmental protection.
PURGING PROCEDURES
Connect the refrigerant pipes (both liquid pipe and the gas pipe) between the indoor and the outdoor unit.
Remove the service port cap of the stop valve on the side of the outdoor unit gas pipe. (The stop valve will
not work in it initial state fresh out of the factory (totally closed with cap on).)
Connect the gauge manifold valve and the vacuum pump to the service port of the stop valve on the gas
pipe side of the outdoor unit.
Run the vacuum pump. (Vacuumize for more than 15 minutes.)
Check the vacuum with the gauge manifold valve, then close the gauge manifold valve, and stop the vacuum
pump.
Leave as it is for one or two minutes. Make sure the pointer gauge manifold valve remains in the same
position. Confirm that the pressure gauge shows–0.101 Mpa [Gauge] (–760 mmHg).
Remove the gauge manifold valve quickly from the service port of the stop valve.
After refrigerant pipes are connected and evacuated, fully open all stop valves on both sides of gas pipe and
liquid pipe.
Operating without fully opening lowers the performance and this causes trouble.
Pipe length up to 7 m
No gas charge is needed.
Pipe length exceeding 7 m
Charge the prescribed amount of
gas. (refer to 3)
Tighten the cap to the service port to obtain the initial status.
Retighten the cap.
Leak test
Tightening torque
N·mkgf·cm
Cap for service port 13.7 to 17.7 140 to 180
Cap for stop valve 19.6 to 29.4 200 to 300
*Close
*Open
Hexagonal wrench
Stop valve
*4 to 5 turns
Stop valve
(or the vacuum pump with
the function to prevent the
back flow)
Gauge manifold
valve (for R410A)
Pressure gauge
(for R410A)
Compound pressure
gauge (for R410A)
-0.101MPa
(-760 mmHg)
Handle
Low
Handle High
Window
Charge hose
(for R410A)
Vacuum
pump
Adapter for preventing the
back flow
Charge hose
(for R410A)
Service port
Stop
valve
Page 12
12
6-6 AUTO RESTART FUNCTION
When the indoor unit is controlled with the remote controller, the operation mode, set temperature, and the fan
speed are memorized by the indoor electronic control P.C. board. The auto restart function sets to work the
moment the power has restored after power failure, then, the unit will restart automatically. If the unit is operated
in “I FEEL CONTROL” mode before power failure, the operation is not memorized. In
“I FEEL CONTROL” mode, the operation is decided by the initial room temperature at (re)start.
Notes:
• The operation settings are memorized when 10 seconds have passed after the remote controller was operated.
• If the main power is turned off or a power failure occurs while AUTO START/STOP timer is active, the timer
setting is cancelled. As this model is equipped with the auto restart function, the air conditioner should start
operating at the same time that a power has restored.
• If the unit has been off with the remote controller before power failure, the auto restart function does not work
as the power button of the remote controller is off.
• To prevent breaker off due to the rush of starting current, systematize other home appliance not to turn on at
the same time.
6-7 EXPLANATION TO THE CUSTOMER
• Using the instruction manual, explain the following to the customer how to control temperature, how to remove the air filters, how to remove or put the remote controller in the remote controller holder, how to clean,
precautions, etc.
• Recommend the customer to carefully read the Operating Instruction Book.
EMERGENCY OPERATION switch
POWER
3
Mode
COOL
(Light) (Off)
Operation indicator
lamp
STOP
(Lights not turn on)
HEAT
(Off) (Light)
2
1
Page 13
13
Front panel
Lock
1
2
Union
Liquid pipe
Gas pipe
Stop valve
Service port
Gauge manifold
valve (for R410A)
Charge hose (for R410A)
Outdoor unit
Refrigerant gas cylinder for
R410A with siphon
Refrigerant (liquid)
Electronic scale for refrigerant charging
Page 14
VN79A510H01
HEAD OFFICE MITSUBISHI DENKI BLDG MARUNOUCHI TOKYO 100-8310 TELEX J24532 CABLE MELCO TOKYO
• Low Voltage Directive 73/23/ EEC
• Electromagnetic Compatibility Directive 89/
336/ EEC
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