Mitsubishi Electric DXK09ZJ-S, Техническое руководство

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'11 • SRK-T-118
2. REFRIGERANT PIPING WORK
1) Restrictions on unit installation and use
● Check the following points in light of the indoor unit specifications and the installation site.
● Observe the following restrictions on unit installation and use. Improper installation can result in a compressor failure or performance degradation.
● Additional refrigerant charge is not required at all.
2) Determination of pipe size
●
Determine refrigerant pipe size pursuant to the following guidelines based on the
indoor unit specifications.
15m or less
10m or less
10m or less
L
H
H
Gas pipe Liquid pipe
φ 9.52 φ 6.35
Flare Flare
φ 9.52 φ 6.35
φ
9.52
φ
6.35
Notabilia as a unit designed for R410A
● Do not use any refrigerant other than R410A. R410A will rise to pressure about 1.6 times higher than that of a conventional refrigerant.
A cylinder containing R410A has a pink indication mark on the top.
● A unit designed for R410A has adopted a different size indoor unit operation valve charge port and a different size check joint provided in the unit to prevent the charging of a wrong refrigerant by mistake.
The processed dimension of the flared part of a refrigerant pipe and a flare nut's parallel side measurement have also been altered to raise strength against pressure.
Accordingly, you are required to arrange dedicated R410A tools listed in the table on the right before installing or servicing this unit.
● Do not use a charge cylinder. The use of a charge cylinder will cause the refrigerant composition to change, which results in performance degradation.
●
In charging refrigerant, always take it out from a cylinder in the liquid phase.
● All indoor units must be models designed exclusively for R410A. Check connectable indoor unit models in a catalog, etc. (A wrong indoor unit, if connected into the system, will impair proper system operation)
1. HAULAGE AND INSTALLATION
(Take particular care in carrying in or moving the unit, and always perform such an operation with two or more persons.)
② Notabilia for installation
Intake
The height of a wall is 1200mm or less.
( service
space
)
Intake
Outlet
Fasten with bolts
(M10-12)
Use a thicker block to anchor deeper.
Use a long block to
extend the width.
CAUTION
When a unit is hoisted with slings for haulage, take into consideration the offset of its gravity center position.
If not properly balanced, the unit can be thrown off-balance and fall.
1) Delivery
● Deliver the unit as close as possible to the installation site before removing it from
the packaging.
● When you have to unpack the unit for a compelling reason before you haul it to the
installation point, hoist the unit with nylon slings or ropes and protection pads so that
you may not damage the unit.
2) Portage
●
The right hand side of the unit as viewed from the front (diffuser side) is heavier.
A person carrying the right hand side must take heed of this fact. A person carrying
the left hand side must hold with his right hand the handle provided on the front panel
of the unit and with his left hand the corner column section.
3) Selecting the installation location
Be careful of the following conditions and choose an installation place.
〇
Where air is not trapped.
〇
Where the installation fittings can be firmly installed.
〇
Where wind does not hinder the intake and outlet pipes.
〇
Out of the heat range of other heat sources.
〇
A place where stringent regulation of electric noises is applicable.
〇
Where it is safe for the drain water to be discharged.
〇
Where noise and hot air will not bother neighboring residents.
〇
Where snow will not accumulate.
〇
Where strong winds will not blow against the outlet pipe.
〇
A place where no TV set or radio receiver is placed within 5m.
(If electrical interference is caused, seek a place less likely to cause the problem)
〇
If a operation is conducted when the outdoor air temperature is -5 ℃ lower, the outdoor unit should be installed
at a place where it is not influenced by natural wind.
〇
Where it is likely that the unit is subjected to strong winds, provide wind guards according to the following guidelines.
Strong winds can cause performance degradation, an accidental stop due to a rise of high pressure and a broken fan.
4) Installation space
● Walls surrounding the unit in the four sides are not acceptable.
●
There must be a 1-meter or larger space in the above.
●
When more than one unit are installed side by side, provide a 250mm or wider interval between them as a
service space. In order to facilitate servicing of controllers, please provide a sufficient space between units
so that their top plates can be removed easily.
●
Where a danger of short-circuiting exists, install guide louvers.
● When more than one unit are installed, provide sufficient intake space consciously so that short-circuiting may not occur.
●
Where piling snow can bury the outdoor unit, provide proper snow guards.
1. Place the unit outlet pipe perpendicular to the wind direction.
L
3
L
2
L
4
L
1
Model 09, 12
Example installation
Size
L1
L2
L3
L4
Ⅰ
Open
100
100
250
Ⅱ
280
75
80
Open
Ⅲ
280
Open
80
250
Ⅳ
180
Open
80
Open
（mm）
①
Anchor bolt fixed position
●
In installing the unit, fix the unit’s legs with bolts specified on the left.
● The protrusion of an anchor bolt on the front side must be kept within 15 mm.
●
Securely install the unit so that it does not fall over during earthquakes or strong winds, etc.
●
Refer to the above illustrations for information regarding concrete foundations.
● Install the unit in a level area. (With a gradient of 5 mm or less.)
Improper installation can result in a compressor failure, broken piping within the unit and abnormal noise generation.
Heavy
Wind direction
Wind direction
2.Install so the direction of the air from the blowing outlet will be
perpendicular to the direction of the wind.
5) Installation
L
H
Outdoor unit
Indoor unit
CAUTION
●
The use restrictions appearing in the table above are applicable to the standard pipe size combinations shown in the table below.
Restrictions Dimensional restrictions Marks appearing in the drawing on the right
Main pipe length
When the outdoor unit is positioned higher,
When the outdoor unit is positioned lower,
Elevation difference between
indoor and outdoor units
Outdoor unit connected
Refrigerant piping (branch pipeL)
Indoor unit connected
Plug the end of the pipe with tape, or other
material, and fill the pipe with nitrogen gas.
Only use nitrogen gas (N
2
)
Taping
＜ N
2
＞
Nitrogen
Brazing
Station valve
Primary side Secondary side
0.5MPa
Hand
Relief valve
Nitrogen
gas
Brazing must be performed under a nitrogen gas flow.
Without nitrogen gas, a large quantity of foreign matters (oxidized film) are created,
causing a critical failure from capillary tube or expansion valve clogging.
About brazing
When pipe is brazing.
3) Refrigerant pipe wall thickness and material
● Select refrigerant pipes of the table shown on the right wall thickness and
material as specified for each pipe size.
Pipe diameter [mm]
Minimum pipe wall thickness [mm]
Pipe material*
6.35
0.8
O-type pipe
9.52
0.8
O-type pipe
NOTE
*Phosphorus deoxidized seamless copper pipe ICS 23.040.15, ICS 77.150.30
●
Select pipes having a wall thickness larger than the specified
minimum pipe thickness.
Pad
Over 500mm
Model 09, 12
Intake
Outlet
312.
5
24.3
14.8
288.
8
111 510 157.8
351.
6
Accessories for outdoor unit
• Model name and power source
• Refrigerant piping length
• Piping, wiring and miscellaneous small parts
• Indoor unit installation manual
Necessary tools for the installation work
Wrench key (Hexagon) [4m/m]
Vacuum pump
Vacuum pump adapter (Anti-reverse flow type)
(Designed specifically for R410A)
Gauge manifold (Designed specifically for R410A)
Charge hose (Designed specifically for R410A)
Flaring tool set (Designed specifically for R410A)
Gas leak detector (Designed specifically for R410A)
Gauge for projection adjustment
(Used when flare is made by using conventional flare tool) 9
10
11
12
13
14
15
16
Plus headed driver
Knife
Saw
Tape measure
Hammer
Spanner wrench
Torque wrench [14.0
~
62.0N·m (1.4
~
6.2kgf·m)]
Hole core drill (65mm in diameter)
1
2
3
4
5
6
7
8
Grommet (Heat pump type only)
Drain elbow (Heat pump type only)
Q’ty
1
1 1
2
Option parts
Sealing plate
Sleeve
Inclination plate
Putty
Drain hose (extension hose)
Piping cover
(for insulation of connection piping)
Q’ty
1
1
1
1
1
1
Check before installation work
a
b
c
d
e
f
INSTALLATION MANUAL FOR OUTDOOR UNIT
• Read the “SAFETY PRECAUTIONS” carefully first of all and strictly follow it during the installation work in order
to protect yourself.
• The precautionary items mentioned below are distinguished into two levels, and .
: Wrong installation would cause serious consequences such as injuries or death.
: Wrong installation might cause serious consequences depending on circumstances.
Both mentions the important items to protect your health and safety so strictly follow them by any means.
• Be sure to confirm no anomaly on the equipment by commissioning after completed installation and explain the
operating methods as well as the maintenance methods of this equipment to the user according to the owner’s
manual.
• Keep the installation manual together with owner’s manual at a place where any user can read at any time.
Moreover if necessary, ask to hand them to a new user.
• For installing qualified personnel, take precautions in respect to themselves by using suitable protective
clothing, groves, etc., and then perform the installation works.
• Please pay attention not to fall down the tools, etc. when installing the unit at the high position.
• If unusual noise can be heard during operation, consult the dealer.
• The meanings of “Marks” used here are shown as follows:
• This installation manual deals with outdoor units and general installation specifications only. For indoor units, refer to the respective installation manuals supplied with the units.
• When install the unit, be sure to check whether the selection of installation place, power supply specifications, usage limitation (piping length, height differences between indoor and outdoor units, power
supply voltage and etc.) and installation spaces.
SAFETY PRECAUTIONS
WARNING
Never do it under any circumstances. Always do it according to the instruction.
CAUTION WARNING
CAUTION
WARNING
CAUTION
• Carry out the electrical work for ground lead with care.
Do not connect the ground lead to the gas line, water line, lightning conductor or telephone line’s ground lead. Incorrect grounding can cause unit faults such as electric shocks due to short-circuiting.
• Installation must be carried out by the qualified installer.
If you install the system by yourself, it may cause serious trouble such as water leaks,
electric shocks, fire and personal injury, as a result of a system malfunction. Do not
carry out the installation and maintenance work except the by qualified installer.
• Install the system in full accordance with the installation manual.
Incorrect installation may cause bursts, personal injury, water leaks, electric
shocks and fire.
• Be sure to use only for household and residence.
If this appliance is installed in inferior environment such as machine shop and etc.,
it can cause malfunction.
• When installing in small rooms, take prevention measures not to
exceed the density limit of refrigerant in the event of leakage, referred
by the formula (accordance with ISO5149).
If the density of refrigerant exceeds the limit, please consult the dealer and install
the ventilation system, otherwise lack of oxygen can occur, which can cause serious
accident.
• Use the original accessories and the specified components for
installation.
If parts other than those prescribed by us are used, It may cause water leaks,
electric shocks, fire and personal injury.
• Install the unit in a location with good support.
Unsuitable installation locations can cause the unit to fall and cause material
damage and personal injury.
• Ensure the unit is stable when installed, so that it can withstand
earthquakes and strong winds.
Unsuitable installation locations can cause the unit to fall and cause material
damage and personal injury.
• Ventilate the working area well in the event of refrigerant leakage during
installation.
If the refrigerant comes into contact with naked flames, poisonous gas is produced.
• Use the prescribed pipes, flare nuts and tools for R410A.
Using existing parts (for R22 or R407C) can cause the unit failure and serious
accidents due to burst of the refrigerant circuit.
• Tighten the flare nut by torque wrench with specified method.
If the flare nut were tightened with excess torque, this may cause burst and
refrigerant leakage after a long period.
• Do not open the operation valves for liquid line and gas line until
completed refrigerant piping work, air tightness test and evacuation.
If the compressor is operated in state of opening operation valves before
completed connection of refrigerant piping work, air can be sucked into refrigerant
circuit, which can cause bust or personal injury due to anomalously high pressure
in the refrigerant.
• The electrical installation must be carried out by the qualified electrician
in accordance with “the norm for electrical work” and “national wiring
regulation”, and the system must be connected to the dedicated circuit.
Power supply with insufficient capacity and incorrect function done by improper
work can cause electric shocks and fire.
• Be sure to shut off the power before starting electrical work.
Failure to shut off the power can cause electric shocks, unit failure or incorrect
function of equipment.
• Be sure to use the cables conformed to safety standard and cable
ampacity for power distribution work.
Unconformable cables can cause electric leak, anomalous heat production or fire.
• This appliance must be connected to main power supply by means of a
circuit breaker or switch (fuse:16A) with a contact separation of at least
3mm.
• Arrange the wiring in the control box so that it cannot be pushed up
further into the box. Install the service panel correctly.
Incorrect installation may result in overheating and fire.
• Use the prescribed cables for electrical connection, tighten the cables
securely in terminal block and relieve the cables correctly to prevent
overloading the terminal blocks.
Loose connections or cable mountings can cause anomalous heat production or fire.
• Be sure to fix up the service panels.
Incorrect fixing can cause electric shocks or fire due to intrusion of dust or water.
• Be sure to switch off the power supply in the event of installation,
inspection or servicing.
If the power supply is not shut off, there is a risk of electric shocks, unit failure or
personal injury due to the unexpected start of fan.
• Stop the compressor before removing the pipe after shutting the
service valve on pump down work.
If the pipe is removed when the compressor is in operation with the service valve
open, air would be mixed in the refrigeration circuit and it could cause explosion
and injuries due to abnormal high pressure in the cooling cycle.
• Only use prescribed optional parts. The installation must be carried out
by the qualified installer.
If you install the system by yourself, it can cause serious trouble such as water
leaks, electric shocks, fire.
• Be sure to wear protective goggles and gloves while at work.
• Earth leakage breaker must be installed.
If the earth leakage breaker is not installed, it can cause electric shocks.
• Ensure that no air enters in the refrigerant circuit when the unit is
installed and removed.
If air enters in the refrigerant circuit, the pressure in the refrigerant circuit
becomes too high, which can cause burst and personal injury.
• Do not processing, splice the power cord, or share a socket with other power plugs.
This may cause fire or electric shock due to defecting contact, defecting insulation
and over-current etc.
• Do not bundling, winding or processing for the power cord. Or, do not
deforming the power plug due to tread it.
This may cause fire or heating.
• Do not run the unit with removed panels or protections.
Touching rotating equipments, hot surfaces or high voltage parts can cause
personal injury due to entrapment, burn or electric shocks.
• Do not perform any change of protective device itself or its setup
condition.
The forced operation by short-circuiting protective device of pressure switch and
temperature controller or the use of non specified component can cause fire or
burst.
• Use the circuit breaker for all pole correct capacity. Circuit breaker
should be the one that disconnect all poles under over current.
Using the incorrect circuit breaker, it can cause the unit malfunction and fire.
• Install isolator or disconnect switch on the power supply wiring in
accordance with the local codes and regulations.
The isolator should be locked in OFF state in accordance with EN60204-1.
• After maintenance, all wiring, wiring ties and the like, should be returned
to their original state and wiring route, and the necessary clearance from
all metal parts should be secured.
• Secure a space for installation, inspection and maintenance specified in
the manual.
Insufficient space can result in accident such as personal injury due to falling from
the installation place.
• Take care when carrying the unit by hand.
If the unit weights more than 20kg, it must be carried by two or more persons. Do
not carry by the plastic straps, always use the carry handle when carrying the unit
by hand. Use gloves to minimize the risk of cuts by the aluminum fins.
• Dispose of any packing materials correctly.
Any remaining packing materials can cause personal injury as it contains nails and
wood. And to avoid danger of suffocation, be sure to keep the plastic wrapper
away from children and to dispose after tear it up.
• Be sure to insulate the refrigerant pipes so as not to condense the
ambient air moisture on them.
Insufficient insulation can cause condensation, which can lead to moisture
damage on the ceiling, floor, furniture and any other valuables.
• When perform the air conditioner operation (cooling or drying operation)
in which ventilator is installed in the room. In this case, using the air
conditioner in parallel with the ventilator, there is the possibility that
drain water may backflow in accordance with the room lapse into the
negative pressure status. Therefore, set up the opening port such as
incorporate the air into the room that may appropriate to ventilation (For
example; Open the door a little). In addition, just as above, so set up the
opening port if the room lapse into negative pressure status due to
register of the wind for the high rise apartment etc.
• Do not install the unit in the locations listed below.
•Locations where carbon fiber, metal powder or any powder is floating.
•Locations where any substances that can affect the unit such as sulphide gas,
chloride gas, acid and alkaline can occur.
•Vehicles and ships.
•Locations where cosmetic or special sprays are often used.
•Locations with direct exposure of oil mist and steam such as kitchen and
machine plant.
•Locations where any machines which generate high frequency harmonics are
used.
•Locations with salty atmospheres such as coastlines.
•Locations with heavy snow (If installed, be sure to provide base flame and snow
hood mentioned in the manual).
•Locations where the unit is exposed to chimney smoke.
•Locations at high altitude (more than 1000m high).
•Locations with ammonic atmospheres.
•Locations where heat radiation from other heat source can affect the unit.
•Locations without good air circulation.
•Locations with any obstacles which can prevent inlet and outlet air of the unit.
•Locations where short circuit of air can occur (in case of multiple units
installation).
•Locations where strong air blows against the air outlet of outdoor unit.
•Locations where something located above the unit could fall.
It can cause remarkable decrease in performance, corrosion and damage of
components, malfunction and fire.
• Do not install the outdoor unit in the locations listed below.
• Locations where discharged hot air or operating sound of the outdoor unit can
bother neighborhood.
• Locations where outlet air of the outdoor unit blows directly to an animal or
plants. The outlet air can affect adversely to the plant etc.
• Locations where vibration can be amplified and transmitted due to insufficient
strength of structure.
• Locations where vibration and operation sound generated by the outdoor unit
can affect seriously (on the wall or at the place near bed room).
• Locations where an equipment affected by high harmonics is placed (TV set or
radio receiver is placed within 5m).
• Locations where drainage cannot run off safely.
It can affect surrounding environment and cause a claim.
• Do not install the unit near the location where leakage of combustible
gases can occur.
If leaked gases accumulate around the unit, it can cause fire.
• Do not install the unit where corrosive gas (such as sulfurous acid gas etc.)
or combustible gas (such as thinner and petroleum gases) can accumulate
or collect, or where volatile combustible substances are handled.
Corrosive gas can cause corrosion of heat exchanger, breakage of plastic parts
and etc. And combustible gas can cause fire.
• Do not install nor use the system close to the equipment that generates
electromagnetic fields or high frequency harmonics.
Equipment such as inverters, standby generators, medical high frequency
equipments and telecommunication equipments can affect the system, and cause
malfunctions and breakdowns. The system can also affect medical equipment and
telecommunication equipment, and obstruct its function or cause jamming.
• Do not install the outdoor unit in a location where insects and small
animals can inhabit.
Insects and small animals can enter the electric parts and cause damage or fire.
Instruct the user to keep the surroundings clean.
• Do not use the base flame for outdoor unit which is corroded or damaged
due to long periods of operation.
Using an old and damage base flame can cause the unit falling down and cause
personal injury.
• Do not use any materials other than a fuse with the correct rating in the
location where fuses are to be used.
Connecting the circuit with copper wire or other metal thread can cause unit
failure and fire.
• Do not touch any buttons with wet hands.
It can cause electric shocks.
• Do not touch any refrigerant pipes with your hands when the system is in
operation.
During operation the refrigerant pipes become extremely hot or extremely cold
depending the operating condition, and it can cause burn injury or frost injury.
• Do not touch the suction or aluminum fin on the outdoor unit.
This may cause injury.
• Do not put anything on the outdoor unit and operating unit.
This may cause damage the objects or injury due to falling to the object.
• Do not use the unit for special purposes such as storing foods, cooling
precision instruments and preservation of animals, plants or art.
• Do not clean up the unit with water.
RWC012A030C
Model 09, 12
R410A REFRIGERANT USED
a
Wires for connecting indoor
and outdoor units
Exterior tape
Gas piping
Insulation
Liquid piping
Band (accessory)
Pipe cover (accessory)
Cable name plate
Power supply terminal block
○ It holds cables in place and protect the terminal
connection from external force.
○
This clamp is for the cable in the outside
diameter 9~15mm.
Please adjust it when not suitable.
○ Please be sure to carry out D-type (type III)
grounding work.
○ It has stuck on the lid of a control box.
Grounding terminal
Cable clamp
Indoor - Outdoor
connecting wire
Power cable
Please connect the earthed line of indoor and outdoor
connecting wire to a bracket part of the illustration
power cable, indoor - outdoor connecting wire circuit diagram
4. ELECTRICAL WIRING WORK
For details of electrical cabling, refer to the indoor unit installation manual.
3. DRAIN PIPING WORK
● When condensed water needs to be
led to a drain, etc., install the unit on
a flat base (supplied separately as an
optional part) or concrete blocks.
ޓ
Then, please secure space for the drain
elbow and the drain hose.
Drain elbow
Grommet
Drain hose
( To be procured on the installer's part )
7) Heating and condensation prevention
(1) Dress refrigerant pipes (both gas and liquid pipes) for heat insulation and prevention of dew condensation.
●
Improper heat insulation/anti-dew dressing can result in a water leak or dripping causing damage to household effects, etc.
(2) Use a heat insulating material that can withstand 120 ℃ or a higher temperature. Poor heat insulating capacity can cause heat insulation problems or cable
deterioration.
●
All gas pipes must be securely heat insulated in order to prevent damage from dripping water that comes from the condensation formed on them during a cooling operation
or personal injury from burns because their surface can reach quite a high temperature due to discharged gas flowing inside during a heating operation.
●
Wrap indoor units’ flare joints with heat insulating parts (pipe cover) for heat insulation (both gas and liquid pipes).
●
Give heat insulation to both gas and liquid side pipes. Bundle a heat insulating material and a pipe tightly together so that no gaps may be left between them and wrap them
together with a connecting cable by a dressing tape.
●
Both gas and liquid pipes need to be dressed with 20 mm or thicker heat insulation materials above the ceiling where relative humidity exceeds 70%.
● Execute drain piping by using a drain elbow and drain
grommets supplied separately as optional parts, where
water drained from the outdoor unit is a problem.
● Water may drip where there is a larger amount of drain
water. Seal around the drain elbow and drain grommets
with putty or adequate caulking material.
● Condensed water may flow out from vicinity of operation
valve or connected pipes.
Do not put a grommet
on this hole.
This is a supplementary
drain hole to discharge
drain water, when a large
quantity of it is gathered.
CAUTION
CAUTION
Power cable, indoor-outdoor connecting wires
Always use an earth leakage circuit breaker designed for inverter circuits to
prevent a faulty operation.
● Always perform grounding system installation work with the power cord unplugged.
Outdoor unit
Switchgear or Circuit breaker
1
1
2/N
2/N
3
1 2/N 3
Indoor unit
Earth leakage breaker
(Harmonic resistant type)
Interconnecting and
grounding wires
(minimum)
09
12
2.0
mm
2 30A 16A
1.5
mm 2
×4
15A,30mA,
0.1sec or less
Switchgear or Circuit Breaker
Switch breaker Over current protector
rated capacity
Earth leakage breaker
● The specifications shown in the above table are for units without heaters. For units with heaters, refer to
the installation instructions or the construction instructions of the indoor unit.
● Switchgear or Circuit breaker capacity which is calculated from MAX. over current should be chosen along the
regulations in each country.
● The cable specifications are based on the assumption that a metal or plastic conduit is used with no more than
three cables contained in a conduit and a voltage drop is 2%. For an installation falling outside of these
conditions, please follow the internal cabling regulations. Adapt it to the regulation in effect in each country.
Power souce
(minimum)
Model Phase
Single-phase
Take care so that installed pipes may not touch components within a unit.
If touching with an internal component, it will generate abnormal sounds and/or vibrations.
4) On-site piping work
IMPORTANT
How to remove the side cover
●
Carry out the on site piping work with the operation valve fully closed.
●
Give sufficient protection to a pipe end (compressed and blazed, or with an adhesive tape) so
that water or foreign matters may not enter the piping.
● Bend a pipe to a radius as large as practical.(R100
〜
R150) Do not bend a pipe repeatedly to correct
its form.
● Flare connection is used between the unit and refrigerant pipe. Flare a pipe after engaging a
flare nut onto it. Flare dimensions for R410A are different from those for conventional R407C.
Although we recommend the use of flaring tools designed specifically for R410A, conventional
flaring tools can also be used by adjusting the measurement of protrusion B with a protrusion
control gauge.
● The pipe should be anchored every 1.5m or less to isolate the vibration.
●
Tighten a flare joint securely.
Please remove the screw of a side cover and remove to the front.
A
B
Flared pipe end : A
(mm)
φ 6.35
φ 9.52
Copper
pipe outer
diameter
0
ー 0 ． 4
Ａ
9 ． 1
13.2
Copper pipe protrusion for flaring : B
(mm)
φ 6.35
φ
9.52
Copper
pipe outer
diameter
In the case of a rigid (clutch) type
With an R410A tool With a conventional tool
0
〜
0.5 1.0
〜
1.5
CAUTION
CAUTION
CAUTION
Do not apply force beyond proper fastening torque in tightening the flare nut.
Fix both liquid and gas operation valves at the valve main bodies as illustrated on the right, and then fasten
them, applying appropriate fastening torque.
Tightening angle (
°
) Tightening torque (N·m)
φ 6.35 (1/4")
φ 9.52 (3/8")
14
〜
18
34 〜 42
45 〜 60
30 〜 45
150
200
Use a torque wrench. If a torque wrench is
not available, fasten the flare nut manually
first and then tighten it further, using the
left table as a guide.
Recommended length of a tool handle (mm) Operation valve size (mm)
5) Air tightness test
① Although outdoor and indoor units themselves have been tested for air tightness at the factory, check the connecting pipes after the installation work for air tightness
from the operation valve’s check joint equipped on the outdoor unit side. While conducting a test, keep the operation valve shut all the time.
a) Raise the pressure to 0.5 MPa, and then stop. Leave it for five minutes to see if the pressure drops.
b) Then raise the pressure to 1.5 MPa, and stop. Leave it for five more minutes to see if the pressure drops.
c) Then raise the pressure to the specified level (4.15 MPa), and record the ambient temperature and the pressure.
d) If no pressure drop is observed with an installation pressurized to the specified level and left for about one day, it is acceptable. When the ambient Temperature fall
1 ℃ , the pressure also fall approximately 0.01 MPa. The pressure, if changed, should be compensated for.
e) If a pressure drop is observed in checking e) and a) – d), a leak exists somewhere. Find a leak by applying bubble test liquid to welded parts and flare joints and
repair it. After repair, conduct an air-tightness test again.
② In conducting an air-tightness test, use nitrogen gas and pressurize the system with nitrogen gas from the gas side. Do not use a medium other than nitrogen gas
under any circumstances.
Gas side
operation valve
Check joint
Pressur
ize
Close
Outdoor unit
Indoor unit
＜ Work flow ＞
6) Evacuation
Pay attention to the following points in addition to the above for the R410A and
compatible machines.
○
To prevent a different oil from entering, assign dedicated tools, etc. to each refrigerant
type. Under no circumstances must a gauge manifold and a charge hose in particular
be shared with other refrigerant types (R22, R407C, etc.).
○
Use a counterflow prevention adapter to prevent vacuum pump oil from entering the
refrigerant system.
Airtighteness test completed
Fill refrigerant
Vacuum gauge check
Vacuuming completed
Vacuuming begins
Run the vacuum pump for at least one hour after the vacuum
gauge shows -101kPa or lower. (-755mmHg or lower)
Confirm that the vacuum gauge indicator does not rise even if
the system is left for one hour or more.
When the system has remaining moisture
inside or a leaky point, the vacuum gauge
indicator will rise.
Check the system for a leaky point and
then draw air to create a vacuum again.
INSTALLATION TEST CHECK POINTS
After installation
Check the following points again after completion of the installation, and before turnig on the power. Conduct a test run again and ensure that the unit operates properly.
Explain to the customer how to use the unit and how to take care of the unit following the instruction manual.
Side cover
In case of faulty wiring connection, the indoor unit stops,
and then the run lamp turns on and the timer lamp blinks.
Use cables for interconnection wiring to avoid loosening of the wires.
CENELEC code for cables Required field cables.
H
05
R
N
R
4or5
G
1.5
Harmonized cable type
300/500 volts
Natural-and/or synth. rubber wire insulation
Polychloroprene rubber conductors insulation
Stranded core
Number of conductors
One conductor of the cable is the earth conductor
(yellow/green)
Section of copper wire (mm 2 )
Power cables and connecting wires are securely fixed to the terminal block.
The power supply voltage is correct as the rating.
The drain hose is fixed securely.
Operational valve is fully open.
No gas leaks from the joints of the operational valve.
The pipe joints for indoor and outdoor pipes have been insulated.
The reverse flow check cap is attached.
The cover of the pipe cover (A) faces downward to prevent rain from entering.
Gaps are properly sealed between the pipe covers (A) (B) and the wall surface / pipes.
The screw of the slide cover is tightened securely.
Do not hold the valve cap area with a spanner.
Electrical installation work must be performed by an electrical installation service provider qualified by a power provider of the country.
Electrical installation work must be executed according to the technical standards and other regulations applicable to electrical installations in the country.
●
Do not use any supply cord lighter than one specified in parentheses for each type below.
●
braided cord (code designation 60245 IEC 51),
●
ordinary tough rubber sheathed cord (code designation 60245 IEC 53)
●
flat twin tinsel cord (code designation 60227 IEC 41);
Use polychloroprene sheathed flexible cord (code designation 60245 IEC57) for supply cords of parts of appliances for outdoor use.
●
Ground the unit. Do not connect the grounding wire to a gas pipe, water pipe, lightning rod or telephone grounding wire.
If impropery grounded, an electric shock or malfunction may result.
●
A grounding wire must be connected before connecting the power cable. Provide a grounding wire longer than the power cable.
●
The installation of an impulse withstanding type earth leakage breaker is necessary. A failure to install an earth leakage breaker can result in an
acccident such as an electric shock or a fire.
●
Do not turn on the power until the electrical work is completeted .
●
Do not use a condensive capacitor for power factor improvement under any circumstances. (It dose not improve power factor, while it can cause
an abnormal overheat accident)
●
For power supply cables, use conduits.
●
Do not lay electronic control cables (remote control and signaling wires) and other cables together outside the unit. Laying them together can result
in the malfunctioning or a failure of the unit due to electric noises.
●
Fasten cables so that may not touch the piping, etc.
●
When cables are connected, make sure that all electrical components within the electrical component box are free of loose connector coupling or
terminal connection and then attach the cover securely. (Improper cover attachment can result in malfunctioning or a failure of the unit, if water
penetrates into the box.)
●
Always use a three-core cable for an indoor-outdoor connecting cable. Never use a shield cable.
Clearance
RWC012A030C
(three-way valve)
Charge hose
(Designed specifically for R410A)
Compound pressure gauge
Pressure gauge
Gauge Manifold
(Designed specifically for R410A)
Handle Hi.
Vacuum pump
Vacuum pump adapter
(Anti-reverse flow type)
(Designed specifically for R410A)
Charge hose
(Designed specifically for R410A)
Check joint
-0.1MPa
(-76cmHg)
Handle Lo
Operation Valve
Operation Valve
(two-way valve)
Operation Valve
Cap
Operation Valve
Cap
tightening torque (N·m)
Operation valve cap
tightening torque (N·m)
Check joint blind nut
φ 6.35 (1/4")
φ
9 .52 (3/8")
20
〜
30 10
〜
12
Operation valve size
(mm)
Securely tighten the operation valve cap and the check joint blind nut after adjustment.
Where you are likely to have several days of sub-zero
temperatures in a row, do not use a drain elbow and
drain grommets. (There is a risk of drain water
freezing inside and blocking the drain.)
●
H05RNR4G1.5 (Example) or 245IEC57
The screw of the side cover
is tightened securely.