Mitsubishi Electric MXZ-4B36NA Installation manual

Split-type Air-Conditioner
MXZ-3B24NA
MXZ-3B30NA
MXZ-4B36NA
Installation Manual
For INSTALLER
Notice d’installation
Destinée à l’INSTALLATEUR
Manual de instalación
Para el INSTALADOR
• This manual only describes the installation of outdoor unit.
When installing the indoor unit, refer to the installation manual of indoor unit.
Any structural alterations necessary for installation must comply with local building code requirements.
• Cette notice ne décrit que l’installation de l’appareil extérieur.
Lors de l’installation de l’appareil intérieur, consultez la notice d’installation de cet
appareil.
Toute altération structurelle requise pour l’installation doit être conforme aux exigences du code du bâtiment local.
• En este manual sólo se describe la instalación de la unidad exterior.
Para instalar la unidad interior, consulte el manual de instalación de dicha unidad.
Cualquier modificación estructural necesaria para llevar a cabo la instalación deberá cumplir las normas de edificación locales.
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English
Français
Español
10/12/2010 9:19:43 AM
ENGLISH
Required Tools for Installation
Phillips screwdriver
4 mm (5/32 in.) hexagonal
Level
wrench
Scale
Flare tool for R410A
Utility knife or scissors
Gauge manifold for R410A
Torque wrench
Vacuum pump for R410A
Wrench (or spanner)
Charge hose for R410A
Pipe cutter with reamer
CONTENTS
1. BEFORE INSTALLATION............................................................. 1
2. OUTDOOR UNIT INSTALLATION................................................ 4
3. FLARING WORK AND PIPE CONNECTION................................ 5
4. PURGING PROCEDURES, LEAK TEST, AND TEST RUN.......... 5
5. RELOCATION AND MAINTENANCE........................................... 7
1. BEFORE INSTALLATION
1-1.THE FOLLOWING SHOULD ALWAYS BE OBSERVED FOR SAFETY
• Be sure to read “THE FOLLOWING SHOULD ALWAYS BE OBSERVED FOR SAFETY” before installing the air conditioner.
• Be sure to observe the warnings and cautions specified here as they include important items related to safety.
• After reading this manual, be sure to keep it together with the OPERATING INSTRUCTIONS for future reference.
WARNING
(Could lead to death, serious injury, etc.)
n Do not install the unit by yourself (user).
Incomplete installation could cause fire or electric shock, injury due to the unit
falling, or leakage of water. Consult the dealer from whom you purchased the
unit or a qualified installer.
n Perform the installation securely referring to the installation manual.
Incomplete installation could cause fire or electric shock, injury due to the unit
falling, or leakage of water.
n Install the unit securely in a place which can bear the weight of the unit.
If the installation location cannot bear the weight of the unit, the unit could fall
causing injury.
n Perform electrical work according to the installation manual and be sure
to use an exclusive circuit. Do not connect other electrical appliances to
the 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.
n Do not damage the wires by applying excessive pressure with parts or
screws.
Damaged wires could cause fire.
n Be sure to cut off the main power in case of setting up the indoor P.C.
board or wiring works.
Failure to do so could cause electric shock.
n Use the specified wires to connect the indoor and outdoor units securely and attach the wires firmly to the terminal block connecting sections
so the stress of the wires is not applied to the sections.
Incomplete connecting and securing could cause fire.
n Do not install the unit in a place where inflammable gas may leak.
If gas leaks and accumulates in the area around the unit, it could cause an
explosion.
n Do not use intermediate connection of the power cord or the extension
cord and do not connect many devices to one AC outlet.
It could cause a fire or an electric shock due to defective contact, defective
insulation, exceeding the permissible current, etc.
n Be sure to use the parts 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.
n When plugging the power supply plug into the outlet, make sure that
there is no dust, clogging, or loose parts in both the outlet and the plug.
Make sure that the power supply plug is pushed completely into the outlet.
If there is dust, clogging, or loose parts on the power supply plug or the outlet,
it could cause electric shock or fire. If loose parts are found on the power supply plug, replace it.
CAUTION
n Attach the electrical cover to the indoor unit and the service panel to
the outdoor unit securely.
If the electrical cover of the indoor unit and/or the service panel of the outdoor unit are not attached securely, it could result in a fire or an electric
shock due to dust, water, etc.
n When installing or relocating the unit, make sure that no substance
other than the specified refrigerant (R410A) enters the refrigerant circuit.
Any presence of foreign substance such as air can cause abnormal pressure rise or an explosion.
n Do not discharge the refrigerant into the atmosphere. If refrigerant
leaks during installation, ventilate the room.
If refrigerant comes in contact with a fire, harmful gas could be generated. Refrigerant leakage may cause suffocation. Ventilate the room.
n Check that the refrigerant gas does not leak after installation has been
completed.
If refrigerant gas leaks indoors, and comes into contact with the flame of a
fan heater, space heater, stove, etc., harmful substances will be generated.
n Use appropriate tools and piping materials for installation.
The pressure of R410A is 1.6 times more than R22. Not using appropriate
tools or materials and incomplete installation could cause the pipes to burst
or injury.
n When pumping down the refrigerant, stop the compressor before disconnecting the refrigerant pipes.
If the refrigerant pipes are disconnected while the compressor is running
and the stop valve is open, air could be drawn in and the pressure in the refrigeration cycle could become abnormally high. This could cause the pipes
to burst or injury.
n When installing the unit, securely connect the refrigerant pipes before
starting the compressor.
If the compressor is started before the refrigerant pipes are connected and
when the stop valve is open, air could be drawn in and the pressure in the
refrigeration cycle could become abnormally high. This could cause the
pipes to burst or injury.
n Fasten a flare nut with a torque wrench as specified in this manual.
If fastened too tight, a flare nut may break after a long period and cause refrigerant leakage.
n The unit shall be installed in accordance with national wiring regulations.
n Ground the unit correctly.
Do not connect the ground to a gas pipe, water pipe, lightning rod or telephone ground. Defective grounding could cause electric shock.
(Could lead to serious injury in particular environments when operated incorrectly.)
nDepending on the installation area, install a Ground Fault Interrupt (GFI)
circuit breaker.
If the Ground Fault Interrupt (GFI) circuit breaker is not installed, an electric
shock could occur.
n Perform the drainage/piping work securely according to the installation
manual.
If there is defect in the drainage/piping work, water could drop from the unit,
soaking and damaging household goods.
n Do not touch the air inlet or the aluminum fins of the outdoor unit.
This could cause injury.
n Do not install the outdoor unit where small animals may live.
If small animals enter and touch the electric parts inside the unit, it could
cause a malfunction, smoke emission, or fire. Also, advise user to keep the
area around the unit clean.
1-2.SPECIFICATIONS
Model
MXZ-3B24NA
MXZ-3B30NA
MXZ-4B36NA
Power supply
Rated Voltage
Frequency
Max. pipe length per indoor
unit / for multi-system
208 / 230 V
60 Hz
25 m (82 ft) / 70 m (230 ft)
*1Never use pipes with thickness less than specified. The pressure resistance will be insufficient.
*2Use a copper pipe or a copper-alloy seamless pipe.
*3Be careful not to crush or bend the pipe during pipe bending.
*4Refrigerant pipe bending radius must be 100 mm (4 in.) or more.
*5Insulation material : Heat resisting foam plastic 0.045 specific gravity
*6Be sure to use the insulation of specified thickness. Excessive thickness
may cause incorrect installation of the indoor unit and insufficient thickness
may cause dew drippage.
Pipe length and height difference *1, *2, *3, *4, *5, *6
Max. no. of bends per inMax. height difference *7
door unit / for multi system
15 m (49 ft)
25 / 70
Refrigerant adjustment A
*8
20 g/m (1.08 oz each 5 ft)
*7If the outdoor unit is installed higher than the indoor unit, max. height difference is reduced to 10 m (33 ft).
*8If pipe length exceeds 40 m (131 ft), additional refrigerant (R410A) charge
is required. (No additional charge is required for pipe length less than
40 m (131 ft).)
Additional refrigerant (m)= A × (pipe length (m) – 40)
(pipe length (ft) – 131)
Additional refrigerant (ft) = A ×
5
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1-3.SELECTING OPTIONAL DIFFERENT-DIAMETER JOINTS
If the diameter of connection pipe does not match the port size of outdoor unit, use optional different-diameter joints according to the following table.
(Unit: mm (inch))
Optional different-diameter joints (port size of outdoor unit → diameter of connection pipe)
6.35 (1/4) → 9.52 (3/8) : PAC-493PI
9.52 (3/8) → 12.7 (1/2) : MAC-454JP
9.52 (3/8) → 15.88 (5/8) : PAC-SG76RJ
12.7 (1/2) → 9.52 (3/8) : MAC-A455JP
12.7 (1/2) → 15.88 (5/8) : MAC-A456JP
Refer to the installation manual of indoor unit for the diameter of connection pipe of indoor unit.
Port size of outdoor unit
MXZ-3B
MXZ-4B
Liquid / Gas
A UNIT
6.35 (1/4) / 12.7 (1/2)
B - C UNIT B - D UNIT
6.35 (1/4) / 9.52 (3/8)
1-4.SELECTING THE INSTALLATION LOCATION
•
•
•
•
•
Where it is not exposed to strong wind.
Where airflow is good and dustless.
Where rain or direct sunshine can be avoided as much as possible.
Where neighbours are not annoyed by operation sound or hot air.
Where rigid wall or support is available to prevent the increase of operation
sound or vibration.
• Where there is no risk of combustible gas leakage.
• When installing the unit, be sure to secure the unit legs.
• Where it is at least 3 m (10 ft.) away from the antenna of TV set or radio.
Operation of the air conditioner may interfere with radio or TV reception in
areas where reception is weak. An amplifier may be required for the affected
device.
• Install the unit horizontally.
• Please install it in an area not affected by snowfall or blowing snow. In
areas with heavy snow, please install a canopy, a pedestal and/or some
baffle boards.
Note:
It is advisable to make a piping loop near outdoor unit so as to reduce vibration transmitted from there.
FREE SPACE REQUIRED AROUND OUTDOOR UNIT
1.Obstacles above
When there is no obstacle in front and on the sides of the unit, it is allowed
to install the unit where an obstacle is above the unit only if the space
shown in the figure is provided.
Note:
When operating the air conditioner in low outside temperature, be sure to
follow the instructions described below.
• Never install the outdoor unit in a place where its air inlet/outlet side may
be exposed directly to wind.
• To prevent exposure to wind, install the outdoor unit with its air inlet side
facing the wall.
• To prevent exposure to wind, it is recommended to install a baffle board on
the air outlet side of the outdoor unit.
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.
• Where there is emission of high levels of VOCs, including phthalate compounds, formaldehyde, etc., which may cause chemical cracking.
2.Front (blowing) side open
As long as space indicated in the figure is provided, it is allowed to install
the unit where obstacles are behind and on the sides of the unit. (No obstacle above the unit)
100 (3-15/16) or more
200 (7-7/8) or more
500 (19-11/16) or more
100 (3-15/16) or more
3.Obstacles in front (blowing) only
When there is an obstacle in front of the unit as shown in the figure, open
space above, behind, and on the sides of the unit is required.
350 (13-25/32) or more
4.Obstacles in front and behind
The unit can be used by attaching an optional outdoor blowing guide
(MAC-856SG) (but both sides and top are open).
100 (3-15/16) or more
500 (19-11/16) or more
500 (19-11/16) or more
Blowing guide (MAC-856SG)
5.Obstacles in front, behind and on side(s)
• When installing the unit in an area that is enclosed with walls such as a
verandah, be sure to have enough space as shown below.
In this case, the air conditioning capacity and power consumption might
deteriorate.
• When installing two or more units, do not install the units in front or behind each other.
6.Service space
Provide space for service and maintenance as shown in the figure.
Service space
500 (19-11/16)
or more
200 (7-7/8) or more
100 (3-15/16)
or more
350 (13-25/32)
or more
500 (19-11/16)
or more
100 (3-15/16) or more
100 (3-15/16) or more
500 (19-11/16)
or more
350 (13-25/32) or more
350 (13-25/32) or more
Height of the obstacle is 1200 (47-1/4) or less
(Unit: mm (inch))
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1-5.INSTALLATION DIAGRAM
After the leak test, apply insulating material tightly so that there is
no gap.
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 (25/32 in.) or thicker
between the wall and the piping
or wrap 7 to 8 turns of insulation
vinyl tape around the piping.
To use existing piping, perform
COOL operation for 30 minutes
and pump down before removing
the old air conditioner. Remake
flare according to the dimension
for new refrigerant.
Open as a rule
More than 500 mm
(19-11/16 in.) if the
front and both sides
are open
More than 100 mm (3-15/16 in.)
More than 200 mm (7-7/8 in.)
if there are obstacles to both
sides
More than
100 mm
(3-15/16 in.)
PARTS TO BE PROVIDED AT YOUR SITE
(A)
(B)
(C)
(D)
(E)
Power supply cord*
Indoor/outdoor unit connecting wire*
Extension pipe
Wall hole cover
Piping tape
Extension drain hose (or soft PVC
(F) hose, 15 mm (19/32 in.) inner
diameter or hard PVC pipe VP16)
(G) Refrigeration oil
(H)
(I)
(J)
(K)
Putty
Pipe fixing band
Fixing screw for (I)
Wall hole sleeve
1
1
1
1
1
1
Little
amount
1
2 to 7
2 to 7
1
* Note:
Place indoor/outdoor unit connecting wire (B) and
power supply cord (A) at least 1 m (3 ft.) away from
the TV antenna wire.
The “Q’ty” for (B) to (K) in the above table is quantity to be used per indoor unit.
Open as a rule
More than 500 mm (19-11/16 in.) if the
back, both sides and top are open
More than 350 mm
(13-25/32 in.)
Outdoor unit installation
900 (35-7/16)
200 (7-7/8)
500 (19-11/16)
2-U-shape notched holes
(Base bolt M10)
Units should be installed by licensed contractor according to
local code requirements.
387 (15-1/4)
Air inlet
355
(13-31/32)
320
(12-19/32)
Air inlet
Air outlet
2 - 12 (15/32) × 36 (1-31/32) oval holes
(Base bolt M10)
Unit : mm (inch)
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2. OUTDOOR UNIT INSTALLATION
2-1.INSTALLING THE UNIT
•
•
•
•
Be sure to fix the unit’s legs with bolts when installing it.
Be sure to install the unit firmly to ensure that it does not fall by an earthquake or a gust.
Refer to the figure in the right for concrete foundation.
Do not use the drain socket and the drain caps in the cold region. Drain may freeze and it makes the fan stop.
Anchor leg
500
(19-11/16)
330 (13)
25 (31/32) or less
Fix here with
M10 bolts.
Anchor both length
Make the setting
depth deeper.
Anchor both pitch
(Unit: mm (inch))
Make with wider.
2-2.CONNECTING WIRES FOR OUTDOOR UNIT
•
•
•
•
Be sure to use special circuits for room air conditioner.
Wiring work should be based on applicable technical standards.
Wiring connections should be made following the diagram.
Screws should be tightened so they won’t loosen.
OUTDOOR UNIT
Power supply (V, PHASE, Hz)
Max. Fuse size (time delay) (A)
Min. Circuit Ampacity (A)
Fan motor (F.L.A)
(R.L.A)
Compressor
(L.R.A)
Control voltage
ELECTRICAL SPECIFICATIONS
MXZ-3B24NA
MXZ-3B30NA
208/230, 1, 60
20
18
0.93
11
15
Indoor unit-Remote controller : (Wireless)
Indoor unit-Outdoor unit : DC12-24V
1)Remove the service panel.
2) Remove the conduit cover.
3) Attach the conduit connector to conduit cover with lock nut then secure it to the unit with screws.
4) Connect ground wires to the TB support.
5)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.
6)Firmly tighten the terminal screws to prevent them from loosening.
After tightening, pull the wires lightly to confirm that they do not move.
7) Perform 5) and 6) for each indoor unit.
8)Connect power supply cord (A).
9)Close the service panel securely. Make sure that 3-2. PIPE CONNECTION 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.
25
23
0.93
14.4
15
Conduit cover
Connector
Lock nut
Terminal block for power supply
Service panel
Connecting order
• Connect the terminal block in
following order.
A→B→C→D→P
D unit is for 4B36NA only
MXZ-4B36NA
Screws
4B36NA
Power supply
Terminal block for
indoor/outdoor unit
Remark:
* A disconnect switch should be required. Check the local code.
** Use a ring tongue terminal in order to connect a ground wire to terminal.
INDOOR UNIT A – C D
Terminal block
Terminal block
35 mm
(1-3/8 in.)
• Connect wires to the matching numbers of terminals.
• Be sure to attach each screw to its correspondent terminal
when securing the cord and/or the wire to the terminal block.
15 mm
(5/8 in.)
Grounding
terminal **
208/230 VAC
1 phase 60 Hz
Lead wire
Power supply
208/230 VAC
1 phase 2 wires 60 Hz
Grounding
terminal **
Disconnect
switch *
Grounding
terminal **
Terminal block
A – C D
Terminal block
OUTDOOR UNIT
D unit is for 4B36NA only
Terminal block 1
Ground
CONNECTING WIRES AND CONNECTING GROUND WIRE
• Use solid conductor AWG14 or stranded conductor AWG14.
• Use double insulated copper wire with 600 V insulation.
• Use copper conductors only.
* Follow local electrical code.
POWER SUPPLY CABLE AND GROUND WIRE
• Use solid or stranded conductor AWG14 (MXZ-3B)/AWG12 (MXZ4B).
• Use copper conductors only.
* Follow local electrical code.
WARNING:
Use the indoor/outdoor unit connecting wire that meets the Standards to connect the indoor and outdoor units and fix the wire to
the terminal block securely so that no external force is conveyed
to the connecting section of the terminal block. An incomplete
connection or fixing of the wire could result in a fire.
For future servicing, give extra length to the connecting wires.
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3. FLARING WORK AND PIPE CONNECTION
3-1.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)
• 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 flaring work again.
Burr
ø6.35 (1/4)
ø9.52 (3/8)
ø12.7 (1/2)
ø15.88 (5/8)
Nut
(mm)
Clutch type tool for R410A
17
22
26
29
0 to 0.5
(0 to 0.02)
Copper pipe
Spare reamer
Pipe cutter
Tilted Uneven Burred
Fig. 1
Fig. 2
Fig. 3
Flaring tool
Inside is shining without any
scratches.
Smooth all
around
Copper pipe
Die
Clutch type
Wing nut type
A [mm (inch)]
Clutch type tool for R22
Wing nut type tool for R22
1.5 to 2.0
(0.06 to 0.08)
1.0 to 1.5
(0.04 to 0.06)
Even length
all around
Flare nut
Fig. 4
Pipe diameter [mm (inch)]
No good
Good
Copper
pipe
2.0 to 2.5
(0.08 to 1.0)
Fig. 5
N•m
13.7 to 17.7
34.3 to 41.2
49.0 to 56.4
73.5 to 78.4
Fig. 6
Tightening torque
kgf•cm
140 to 180
350 to 420
500 to 575
750 to 800
ft•Ib
10 to 13
25 to 30
36 to 42
54 to 58
3-2.PIPE CONNECTION
1)Apply a thin coat of refrigeration oil (G) to the flared ends of the pipes and
the pipe connections of the outdoor unit.
2)Align the center of the pipe with that of the pipe connections of the outdoor
unit, then hand tighten the flare nut 3 to 4 turns.
3)Tighten the flare nut with a torque wrench as specified in the table.
• Over-tightening may cause damage to the flare nut, resulting in refrigerant leakage.
• Be sure to wrap insulation around the piping. Direct contact with the bare
piping may result in burns or frostbite.
WARNING
When installing the unit, securely
connect the refrigerant pipes before
starting the compressor.
3-3.INSULATION AND TAPING
1)Cover piping joints with pipe cover.
2)For outdoor unit side, surely insulate every piping including valves.
3)Using piping tape (E), apply taping starting from the entry of outdoor unit.
• Stop the end of piping tape (E) with tape (with adhesive agent attached).
• When piping have to be arranged through above ceiling, closet or where
the temperature and humidity are high, wind additional commercially sold
insulation to prevent condensation.
CAUTION
When there are the ports which are
not used, make sure their nuts are
tightened securely.
4. PURGING PROCEDURES, LEAK TEST, AND TEST RUN
4-1.PURGING PROCEDURES AND LEAK TEST
1)Remove service port cap of stop valve on the side of the outdoor unit gas
pipe. (The stop valves are fully closed and covered in caps in their initial
state.)
2)Connect gauge manifold valve and vacuum pump to service port of stop
valve on the gas pipe side of the outdoor unit.
3)Run the vacuum pump. (Vacuumize for more than 15 minutes.)
4)Check the vacuum with gauge manifold valve, then close gauge manifold
valve, and stop the vacuum pump.
5)Leave as it is for one or two minutes. Make sure the pointer of gauge
manifold valve remains in the same position. Confirm that pressure gauge
shows –0.101 MPa [Gauge] (–760 mmHg) (–30 in. Hg).
6)Remove gauge manifold valve quickly from service port of stop valve.
7)Fully open all stop valves on the gas pipe and the liquid pipe. Operating
without fully opening lowers the performance and this causes trouble.
8)Refer to 1-2., and charge the prescribed amount of refrigerant if needed.
Be sure to charge slowly with liquid refrigerant. Otherwise, composition of
the refrigerant in the system may be changed and affect performance of
the air conditioner.
9)Tighten cap of service port to obtain the initial status.
10)Leak test
*4 to 5 turns
*Close
*Open
Stop valve cap
(Torque 19.6 to 29.4 N•m,
200 to 300 kgf•cm, 15 to
22 ft•lb)
–0.101MPa [–760 mmHg
(–30 in. Hg)]
Stop valve
for GAS
Hexagonal wrench
Service port cap
(Torque 13.7 to
17.7 N•m, 140 to
180 kgf•cm, 10 to
13 ft•lb)
Pressure gauge
(for R410A)
Gauge manifold
valve (for R410A)
Handle
Low
Stop valve
for LIQUID
Handle High
Charge hose
(for R410A)
Vacuum pump
(for R410A)
When attaching the control valve to
the service port, valve core may deform or loosen if excess pressure is
applied. This may cause gas leak.
Precautions when using
the control valve
A
Control
valve
Open
Compound pressure
gauge (for R410A)
When attaching the control valve to
the service port, make sure that the
valve core is in closed position, and
then tighten part A. Do not tighten
part
A or turn the body when valve
Charge hose
core is in open position.
(for R410A)
Service port
Close
Body
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4-2.GAS CHARGE
Perform gas charge to unit.
1)Connect gas cylinder to the service port of stop valve.
2)Perform air purge of the pipe (or hose) coming from refrigerant gas cylinder.
3)Replenish specified amount of the refrigerant, while operating the air conditioner for cooling.
Note:
In case of adding refrigerant, comply with the quantity specified for the refrigerating cycle.
CAUTION:
When charging the refrigerant system with additional refrigerant, be sure to use liquid refrigerant. Adding gas refrigerant may change the composition of the refrigerant in the system and
affect normal operation of the air conditioner. Also, charge the liquid refrigerant slowly, otherwise
the compressor will be locked.
To maintain the high pressure of the gas cylinder, warm the gas cylinder with warm water (under
40°C (140°F)) during cold season. But never use naked fire or steam.
Stop valve
Liquid
pipe
Union
Union
Indoor
unit
Union
Outdoor
unit
Stop valve with
service port
Union
Refrigerant gas cylinder operating valve
(for R410A)
Gauge manifold
valve (for R410A)
Gas
pipe
D unit is for
4B36NA only
Charge hose
(for R410A)
Refrigerant gas cylinder for R410A with siphon
Refrigerant (liquid)
Electronic scale for refrigerant charging
4-3.TEST RUN
• Test runs of the indoor units should be performed individually. See the installation manual
coming with the indoor unit, and make sure all the units operate properly.
• If the test run with all the units is performed at once, possible erroneous connections of the
refrigerant pipes and the indoor/outdoor unit connecting wires cannot be detected. Thus, be
sure to perform the test run one by one.
About the restart protective mechanism
Once the compressor stops, the restart preventive device operates so the compressor will not
operate for 3 minutes to protect the air conditioner.
Wiring/piping correction function
This unit has a wiring/piping correction function which corrects wiring and piping combination.
When there is possibility of incorrect wiring and piping combination, and confirming the combination is difficult, use this function to detect and correct the combination by following the procedures below.
Make sure that the following is done.
• Power is supplied to the unit.
• Stop valves are open.
Note:
During detection, the operation of the indoor unit is controlled by the outdoor unit. During detection, the indoor unit automatically stops operation. This is not a malfunction.
Procedure
Press the piping/wiring correction switch (SW871) 1 minute or more after turning on the power
supply.
• Correction completes in 10 to 15 minutes. When the correction is completed, its result is
shown by LED indication. Details are described in the following table.
• To cancel this function during its operation, press the piping/wiring correction switch (SW871)
again.
• When the correction completed without error, do not press the piping/wiring correction switch
(SW871) again.
LED indication during detection:
When the result was “cannot be corrected”, press the piping/wiring correction switch (SW871)
again to cancel this function. Then, confirm the wiring and piping combination in a conventional
manner by operating the indoor units one by one.
Result of piping/wiring correction function
• The operation is done while the power is supplied. Make sure not to contact parts other than
the switch, including the P.C. board. This may cause electric shock or burn by hot parts and
live parts around the switch. Contacting the live parts may cause P.C. board damage.
• To prevent electronic control P.C. board damage, make sure to perform static elimination before operating this function.
• This function does not operate when the outside temperature is 0°C (32°F) or below.
1 (Red)
Lighted
LED
2 (Yellow)
Lighted
3 (Green)
Blinking
LED
1 (Red)
2 (Yellow) 3 (Green)
Lighted
Not lighted
Lighted
Blinking
Blinking
Blinking
Other indications
Result
Completed
(Corrected successfully)
Cannot be corrected
Refer to “SAFETY PRECAUTIONS WHEN LED
FLASHES” located behind
the service panel.
4-4.EXPLANATION TO THE USER
• Using the OPERATING INSTRUCTIONS, explain to the user how to use the air conditioner (how to use the remote controller, how to remove the air filters, how to
remove or put the remote controller in the remote controller holder, how to clean, precautions for operation, etc.).
• Recommend the user to read the OPERATING INSTRUCTIONS carefully.
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5. RELOCATION AND MAINTENANCE
5-1.PUMPING DOWN
When relocating or disposing of the air conditioner, pump down the system following the procedure below so that refrigerant is not released into the atmosphere.
1)Connect the gauge manifold valve to the service port of the stop valve on the gas pipe side of the outdoor unit.
2)Fully close the stop valve on the liquid pipe side of the outdoor unit.
3)Close the stop valve on the gas pipe side of the outdoor unit almost completely so that it can be easily closed fully when the pressure gauge shows 0 MPa [Gauge]
(0 lbf/in.2 [0 kgf/cm2]).
4)Start the emergency COOL operation on all the indoor units.
To start the emergency operation in COOL mode, disconnect the power supply plug and/or turn off the breaker. After 15 seconds, connect the power supply plug
and/or turn on the breaker, and then press the E.O. SW once. (The emergency COOL operation can be performed continuously for up to 30 minutes.)
5)Fully close the stop valve on the gas pipe side of the outdoor unit when the pressure gauge shows 0.05 to 0 MPa [Gauge] (approx. 7.25 to 0 lbf/in2 [0.5 to 0 kgf/cm2]).
6)Stop the emergency COOL operation.
To stop operation, press the E.O. SW several times until all LED lamps turn off. Refer to operating instructions for details.
WARNING
When pumping down the refrigerant, stop the compressor before disconnecting
the refrigerant pipes. The compressor may burst if air etc. get into it.
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