Mitsubishi Heavy Industries V Multi 100VNX Technical Manual Download

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296

'13 • P

C-T
-197

INSTALLATION MANUAL FOR OUTDOOR UNIT

SAFETY PRECAUTIONS

PSB012D955F

2. REFRIGERANT PIPING WORK

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.)

Inverter driven single split PAC

100VNX

～

140VNX,100VSX

～

140VSX

Designed for R410A refrigerant

[ Accessory ]

Check before installation work

●

Model name and power source

●

Refrigerant piping length

●

Piping, wiring and miscellaneous small parts

●

Indoor unit installation manual

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)

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.

●

The use restrictions appearing in the table above are applicable to the standard pipe size combinations shown in the table below. Where an existing pipe system is

utilized, different one-way pipe length restrictions should apply depending on its pipe size. For more information, see “ 6. UTILIZATION OF EXISTING PIPING.”

●

With the triple pipe connection, the way of use is different when the difference of one-way pipe length after the first branching point is 3m to 10m. For details, refer

to the above table and right figure.

●

When the 50V or 60V model is connected as an indoor unit, always use a

9.52 liquid pipe for the branch (branching pipe – indoor unit) and a different

diameter joint supplied with the branching pipe set for connection with the indoor unit (

6.35 on the liquid pipe side).

If a

6.35 pipe is used for connection with a branching pipe, a refrigerant distribution disorder may occur, causing one of the indoor units to fall short of

the rated capacity.

●

A riser pipe must be a part of the main. A branching pipe set should be installed horizontally at a point as close to an indoor unit as possible.

A branching part must be dressed with a heat-insulation material supplied as an accessory.

●

For the details of installation work required at and near a branching area, see the installation manual supplied with your branching pipe set.

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.

●

This unit uses R410A. Always use 1/2H pipes having a 1.0mm or thicker wall for

19.05

or larger pipes, because O-type pipes do not meet the pressure resistance requirement.

）

Gauge  manifold
Charge  hose
Electronic  scale  for  refrigerant  charging
Torque  wrench
Flare  tool
Protrusion  control  copper  pipe  gauge
Vacuum  pump  adapter
Gas  leak  detector

Dedicated R410A tools

Pipe diameter

[mm]

Minimum pipe wall thickness

[mm]

Pipe material*

6.35

0.8

O-type pipe

9.52

0.8

O-type pipe

12.7

0.8

O-type pipe

15.88

1.0

O-type pipe

22.22

1.0

1/2H-type pipe

25.4

1.0

1/2H-type pipe

28.58

1.0

1/2H-type pipe

NOTE

*Phosphorus deoxidized seamless copper pipe C1220T, JIS

Ｈ

3300

1) Delivery

●

Deliver the unit as close as possible to the installation site before removing it from the packaging.

●

When some compelling reason necessitates the unpacking of the unit before it is carried in, use

nylon slings or protective wood pieces so as not to damage the unit by ropes lifting it.

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.

◎

This installation manual deals with outdoor units and general installation specifications only. For indoor units, refer to page 212.

◎

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

Intake

(

service

space

)

Intake

Outlet

5) 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.

●

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.

●

A barrier wall placed in front of the exhaust diffuser must not be higher than the unit.

Example installation

Size

L1
L2
L3
L4

Ⅰ

Open

300
150

Ⅱ

Open

300

Ⅲ

500

Open

150

（mm）

1) Restrictions on unit installation and use

2) Determination of pipe size

●

Determine refrigerant pipe size pursuant to the following guidelines based on the indoor unit specifications.

Pad

Wooden pallet

②

Notabilia for installation

Intake

Outlet

Fasten with bolts

(M10-12)

Use a thicker block to

anchor deeper.

Use a long block to extend the width.

190

200

580

410

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 left 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.

6) Installation

Plug the end of the pipe with tape, or other
material, and fill the pipe with nitrogen gas.

Only use nitrogen gas (N

)

Taping

＜

＞

Nitrogen

Brazing

Station valve

Primary side Secondary side

0.5MPa

Hand

Relief valve

Nitrogen

gas

●

Select pipes having a wall thickness larger

than the specified minimum pipe thickness.

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

Edging

1 piece

knock-out hole protection

Descriptions

Outdoor unit connected

Refrigerant piping (branch pipeL)

Flare

Gas pipe

Liquid pipe

Gas pipe

Liquid pipe

Gas pipe

Liquid pipe

One-way pipe length after the first

branching point

Dimensional

limitations

Elevation difference between

indoor and outdoor units

One-way pipe length after the

first branching point and second

branching point

One-way pipe length difference

from the first branching point to

the indoor unit

One-way pipe length difference

from the second branching point

to the indoor unit

One-way pipe length between the first

branching point from to the second

branching point

Main pipe length

Elevation difference between indoor units

One-way pipe length difference from the first branching point to the indoor unit

Marks appearting in the drawing

Model for outdoor units

Single type

Twin type

Triple type A

Triple type B

< 3m

≧

100VN,125VN,100VS,125VS

≦

50m

≦

100m

≦

30m

≦

27m

≦

10m

≦

10m

≦

10m

≦

30m

≦

15m

≦

0.5m

140VN,140VS

100VN,125VN,100VS,125VS,
100VNX,125VNX,100VSX,125VSX

140VN,140VS,140VNX,140VSX

140VN,140VS,
140VNX,140VSX

When the outdoor unit is positioned higher,
When the outdoor unit is positioned lower,

140VN,140VS,
140VNX,140VSX

Twin type

Triple type

140VNX,140VSX

140VN,140VS,
140VNX,140VSX

100VNX,125VNX,100VSX,125VSX

100VN,125VN,100VS,125VS

≦

50m

≦

100m

140VN,140VS

140VNX,140VSX

100VNX,125VNX,100VSX,125VSX

−

＋

−

L1 (1)

＋

｜

−

｜

−

(La

＋

L2), L1

−

(La

＋

L3)

(1)

＋

(1)

h1, h2, h3

｜

−

｜

−

｜

−

｜

−

＋

｜

−

｜

Indoor unit connected
Capacity of indoor unit
Branching pipe set

Branching pipe set

Refrigerant piping (branch pipe L1,L2)
Indoor unit connected
Capacity of indoor unit

Indoor unit connected
Capacity of indoor unit

Refrigerant piping (branch pipe L1,L2,L3)
Indoor unit connected
Capacity of indoor unit
Branching pipe set
Refrigerant piping (branch pipe La)

Indoor unit connected
Refrigerant piping (branch pipe L2,L3)

In the case of a single type

In the case of a twin type

In the case of a triple type A

In the case of a triple type B

DIS-WA1

DIS-TA1

DIS-WA1

15.88

9.52

15.88

9.52

12.7

6.35

12.7

Model 50V

Model 71V

Model 50Vx3

Model 50V

15.88

9.52

15.88

9.52

15.88

9.52

15.88

9.52

Refrigerant piping (branch pipe L1)

12.7

9.52

15.88

9.52

15.88

9.52

15.88

9.52

12.7

6.35

12.7

9.52

12.7

6.35

12.7

9.52

12.7

6.35

12.7

Model 60V

Model 100V

Model 125V

Model 140V

Note (1) Install the indoor units so that L + L1 becomes the longest one-way pipe.

Keep the pipe length difference between L1 and (La + L2) or (La + L3) within 10m.

< Single type >

< Triple type >

< Twin type >

Indoor unit

(The unit of which elevation difference from the outdoor unit is the largest.)

Indoor unit

(The unit of which elevation difference from the outdoor unit is the largest.)

L (riser)

Outdoor unit

Indoor unit

Outdoor unit

Indoor unit

L (riser)

Outdoor unit

Indoor unit

Type A

Type B

L (riser)

Outdoor unit

Indoor unit

●

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.

7) To run the unit for a cooling operation, when the outdoor temperature

is –5°C or lower.

●

When the outdoor air temperature is -5°C or lower, provide a snow hood to the outdoor unit on site.

So that strong wind will not blow against the outdoor heat exchanger directly. Regarding outline of a snow hood,

refer to our technical manual.

●

We recommend you to read this “SAFETY PRECAUTIONS” carefully before the installation work in order to gain full advantage of the functions of the unit and to

avoid malfunction due to mishandling.

●

The precautions described below are divided into and . The matters with possibilities leading to serious consequences such as

death or serious personal injury due to erroneous handling are listed in the and the matters with possibilities leading to personal injury or
damage of the unit due to erroneous handling including probability leading to serious consequences in some cases are listed in .

These are

very important precautions for safety. Be sure to observe all of them without fail.

●

The meaning of "Marks" used here are as shown below.

●

For 3 phase power source outdoor unit,EN61000-3-2 is not applicable if consent by the utility company or nortification to the utility company is given before usage.

●

3phase power source unit, both indoor and outdoor, is suitable for installation in a commercial and light industrial environment. If installed as a house-hold

appliance it could cause electromagnetic interference.

●

5 and 6 HP units of single phase power source are equipment complying with IEC 61000-3-12.

●

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

Never do it under any circumstance.

Always do it according to the instruction

WARNING

CAUTION

3) Selection of installation location for the outdoor unit

Be sure to select a suitable installation place in consideration of following conditions.

〇

A place where it is horizontal, stable and can endure the unit weight and will not allow vibration transmittance of the unit.

〇

A place where it can be free from possibility of bothering neighbors due to noise or exhaust air from the unit

〇

A place where the unit is not exposed to oil splashes.

〇

A place where it can be free from danger of flammable gas leakage.

〇

A place where drain water can be disposed without any trouble.

〇

A place where the unit will not be affected by heat radiation from other heat source.

〇

A place where snow will not accumulate.

〇

A place where the unit can be kept away 5m or more from TV set and/or radio receiver in order to avoid any radio or TV interference.

〇

A place where good air circulation can be secured, and enough service space can be secured for maintenance and service of the unit safely.

〇

A place where the unit will not be affected by electromagnetic waves and/or high-harmonic waves generated by other equipment.

〇

A place where chemical substances like sulfuric gas, chloric gas, acid and alkali (including ammonia), which can harm the

unit, will not be generated and not remain.

〇

A place where strong wind will not blow against the outlet air blow of the unit.

1.Install the outlet air blow side of the

unit to face a wall of building, or

provide a fence or a windbreak screen.

3.The unit should be installed on

the stable and level foundation.

If the foundation is not level,

tie down the unit with wires.

Over 500 mm

Wind direction

2.Install the outlet air blow side of

the unit in a position perpendicular

to the direction of wind.

Wind direction

4) Caution about selection of installation location

(1) If the unit is installed in the area where the snow will accumulate, following measures are required.

The bottom plate of unit and intake, outlet may be blocked by snow.

1.Install the unit on the base so

that the bottom is higher than

snow cover surface.

2.Provide a snow hood to

the outdoor unit on site.

3.Install the unit under eaves

or providen the roof on site.

Since drain water generated by defrost control may freeze, following measures are required.

●

Don’t execute drain piping work by using a drain elbow and drain grommets (optional parts). [Refer to Drain piping work.]

●

Recommend setting Defrost Control (SW3-1) and Snow Guard Fan Control (SW3-2). [Refer to Setting SW3-1, SW3-2.]

(2) If the unit can be affected by strong wind, following measures are required.

Strong wind can cause damage of fan (fan motor), or can cause performance degradation, or can trigger anomalous

stop of the unit due to rising of high pressure.

Regarding outline of a snow

hood, refer to our technical

manual.

One-way pipe length of

refrigerant piping

Model 100V

Model 125V

Model 140V

●

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.

●

Install the system in full accordance with the instruction manual.

Incorrect installation may cause bursts, personal injury, water leaks, electric shocks and fire.

●

Use the original accessories and the specified components for installation.

If parts other than those prescribed by us are used, It may cause fall of the unit, water leaks, electric shocks, fire, refrigerant leak, substandard

performance, control failure and personal injury.

●

When installing in small rooms, take prevention measures not to exceed the density limit of refrigerant in the event of leakage

accordance with ISO5149.

Consult the expert about prevention measures. If the density of refrigerant exceeds the limit in the event of leakage, lack of oxygen can occur, which

can cause serious accidents.

●

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.

●

After completed installation, check that no refrigerant leaks from the system.

If refrigerant leaks into the room and comes into contact with an oven or other hot surface, poisonous gas is produced.

●

Hang up the unit at the specified points with ropes which can support the weight in lifting for portage. And to avoid jolting out of alignment,

be sure to hang up the unit at 4-point support.

An improper manner of portage such as 3-point support can cause death or serious personal injury due to falling of the unit

●

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.

●

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.

●

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.

●

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.

●

Do not perform brazing work in the airtight room

It can cause lack of oxygen.

●

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 using double spanners and torque wrench according to prescribed method. Be sure not to

tighten the flare nut too much.

Loose flare connection or damage on the flare part by tightening with excess torque can cause burst or refrigerant leaks which

may result in lack of oxygen.

●

Do not open the service 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 service valves before completed connection of refrigerant piping work, you

may incur frost bite or injury from an abrupt refrigerant outflow and air can be sucked into refrigerant circuit, which can cause

burst or personal injury due to anomalously high pressure in the refrigerant

●

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.

●

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.

●

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.

●

Consult the dealer or an expert regarding removal of the unit.

Incorrect installation can cause water leaks, electric shocks or fire.

●

Stop the compressor before closing valve and disconnecting refrigerant pipes in case of pump down operation.

If disconnecting refrigerant pipes in state of opening service valves before compressor stopping, you may incur frost bite or

injury from an abrupt refrigerant outflow and air can be sucked, which can cause burst or personal injury due to anomalously

high pressure in the refrigerant circuit

●

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 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.

●

Be sure to fix up the service panels.

Incorrect fixing can cause electric shocks or fire due to intrusion of dust or water.

●

Do not perform any repairs or modifications by yourself. Consult the dealer if the unit requires repair.

If you repair or modify the unit, it can cause water leaks, electric shocks or fire.

WARNING

●

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. Never connect the grounding wire to a gas pipe because if gas leaks,it could cause explosion or ignition.

●

Use the circuit breaker for all pole with correct capacity.

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 accordanced with EN60204-1

．

●

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.

●

Pay attention not to damage the drain pan by weld spatter when welding work is done near the indoor unit.

If weld spatter entered into the indoor unit during welding work, it can cause pin-hole in drain pan and result in water leakage. To prevent such damage, keep the indoor unit in its packing or cover it.

●

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.

●

Be sure to perform air tightness test by pressurizing with nitrogen gas after completed refrigerant piping work.

If the density of refrigerant exceeds the limit in the event of refrigerant leakage in the small room, lack of oxygen can occur, which can cause serious accidents.

●

Perform installation work properly according to this installation manual.

Improper installation can cause abnormal vibrations or increased noise generation.

●

Earth leakage breaker must be installed

If the earth leakage breaker is not installed, it can cause fire or electric shocks.

●

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 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.

●

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..

●

When the outdoor unit is installed on a roof or a high place, provide permanent ladders and handrails along the access route and fences and handrails around the outdoor unit.

If safety facilities are not provided, it can cause personal injury due to falling from the installation place.

●

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 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

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 use the unit for special purposes such as storing foods, cooling precision instruments and preservation of animals, plants or art.

It can cause the damage of the items.

●

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 clean up the unit with water

It can cause electric shocks

●

Do not operate the outdoor unit with any article placed on it.

You may incur property damage or personal injure from a fall of the article.

●

Do not step onto the outdoor unit.

You may incur injury from a drop or fall.

CAUTION

Heavy

＜

Work flow

＞

6) Evacuation

7) Additional refrigerant charge

(1) Calculate a required refrigerant charge volume from the following table.

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.

Additional charge volume (kg) = { Main pipe length (m) – Length covered without additional charge 30 (m) } x 0.06 (kg/m) + Total length of branch pipes (m) x 0.06 (kg/m)

Formula to calculate the volume of additional refrigerant required

<Twin, triple, W-twin type>

8) Heating and condensation prevention

(1) Dress refrigerant pipes (both gas and liquid pipes) for heat insulation and prevention of dew condensation.
(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.

- Improper heat insulation/anti-dew dressing can result in a water leak or dripping causing damage to household effects, etc.

- 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.

- Although it is verified in a test that this air conditioning unit shows satisfactory performance under JIS condensation test conditions,

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%.

Wires for connecting indoor
and outdoor units

Exterior tape

Gas piping

insulation

Liquid piping

Band (accessory)

Pipe cover (accessory)

(2) Charging refrigerant

●

Since R410A refrigerant must be charged in the liquid phase, you should charge it, keeping the container cylinder upside down or using a refrigerant cylinder equipped with a siphon tube.

●

Charge refrigerant always from the liquid side service port with the operation valve shut. When you find it difficult to charge a required amount, fully open the outdoor unit valves on both liquid and gas sides and charge refrigerant from the gas

(suction) side service port, while running the unit in the cooling mode. In doing so, care must be taken so that refrigerant may be discharged from the cylinder in the liquid phase all the time. When the cylinder valve is throttled down or a dedicated

conversion tool to change liquid-phase refrigerant into mist is used to protect the compressor, however, adjust charge conditions so that refrigerant will gasify upon entering the unit.

●

In charging refrigerant, always charge a calculated volume by using a scale to measure the charge volume.

●

When refrigerant is charged with the unit being run, complete a charge operation within 30 minutes. Running the unit with an insufficient quantity of refrigerant for a long time can cause a compressor failure.

4. ELECTRICAL WIRING WORK

For details of electrical cabling, refer to the indoor unit installation manual.

5. TEST RUN

6. UTILIZATION OF EXISTING PIPING

3) Setting SW3-1, SW3-2, on-site

(1) Defrost control switching (SW3-1)

・

When this switch is turned ON, the unit will run in the defrost mode more frequently.

・

Set this switch to ON, when installed in a region where outdoor temperature falls below zero during the season the unit is run for a

heating operation.

(2) Snow guard fan control (SW3-2)

・

When this switch is turned on, the outdoor unit fan will run for 10 seconds in every 10 minutes, when outdoor temperature falls to 3

℃

lower and the compressor is not running.

・

When the unit is used in a very snowy country, set this switch to ON.

5) The state of the electronic expansion valve.

The following table illustrates the steady states of the electronic expansion valve.

Valve for a cooling operation

During a cooling operation

When power is turned on

When the unit comes to a normal stop

When the unit comes to an abnormal stop

Valve for a heating operation

During a heating operation During a cooling operation During a heating operation

Complete shut position

Full open position

Full open position
Full open position

Complete shut position

Full open position

Complete shut position

Full open position
Full open position

2) Checking the state of the unit in operation

Use check joints provided on the piping before and after the four-way valve installed inside the

outdoor unit for checking discharge pressure and suction pressure.

As indicated in the table shown on the right, pressure detected at each point will vary

depending on whether a cooling or heating operation has been selected.

SWITCHES FOR ON-SITE SETTING

SW5

All set to OFF for shipment

SWITCHES FOR ON-SITE SETTING

SW3

Cooling during a test run
Heating during a test run

Normal or After the test operation

●

If an error code other than those listed above is indicated, refer to the wiring diagram of the outdoor unit and the indoor unit.

Error indicated on the

remote control unit

Action

Failure event

Open phase

63H1 actuation or operation with operation valves shut

(occurs mainly during a heating operation)

Low pressure error or operation with operation valves shut

(occurs mainly during a cooling operation)

1. Check whether the operation valves are open.

2. If an error has been canceled when 3 minutes have elapsed

since a compressor stop, you can restart the unit by

effecting Check Reset from the remote control unit.

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.

NOTE

●

Before conduct a test run, do not fail to make sure that the operation valves are closed.

●

Turn on power 6 hours prior to a test run to energize the crank case heater.

●

In case of the first operation after turning on power, even if the unit does not move for 30 minutes, it is not a breakdown.

●

Always give a 3-minute or longer interval before you start the unit again whenever it is stopped.

●

Removing the service panel will expose high-voltage live parts and high-temperature parts, which are quite dangerous.

Take utmost care not to incur an electric shock or burns. Do not leave the unit with the service panel open.

●

When you operate switches (SW3, SW5) for on-site setting, be careful not to touch a live part.

●

You cannot check discharge pressure from the liquid operation valve charge port.

●

The 4-way valve (20S) is energized during a heating operation.

●

When power supply is cut off to reset the unit, give 3 or more minutes before you turn on power again after power is cut

off. If this procedure is not observed in turning on power again, “Communication error between outdoor and indoor unit”

may occur.

Check item

Check

Item

Turn

The contents of operation

Electric
wiring

Refrigerant
plumbing

Indoor unit

WARNING

CAUTION

1) Test run method

(1) A test run can be initiated from an outdoor unit by using SW3-3 and SW3-4 for on-site

setting.

(2) Switching SW3-3 to ON will start the compressor.

(3) The unit will start a cooling operation, when SW3-4 is OFF, or a heating operation, when SW3-4 is ON.

(4)

Do not fail to switch SW3-3 to OFF when a test run is completed.

●

A standard refrigerant charge volume means a refrigerant charge volume for an installation with 0m long refrigerant piping.

●

This unit contains factory charged refrigerant covering 30m of refrigerant piping and additional refrigerant charge on the installation site is not required for an installation with up to 30m refrigerant piping.

When refrigerant piping exceeds 30m, additionally charge an amount calculated from the pipe length and the above table for the portion in excess of 30m.

●

When refrigerant piping is shorter than 3m, reduce refrigerant by 1kg from the factory charged volume and adjust to 2.8kg.

●

If an existing pipe system is used, a required refrigerant charge volume will vary depending on the liquid pipe size. For further information, see “6. UTILIZATION OF EXISTING PIPING.”

*When an additional charge volume calculation result is negative,

it is not necessary to charge refrigerant additionally.

Pipe length for

standard refrigerant

charge volume (m)

0.06

Put down the refrigerant volume calculated from the pipe length onto the caution label attached on the back side of the service panel.

3. DRAIN PIPING WORK

○

There are 3 drain holes provided on the bottom plate of an outdoor unit to discharge

condensed water.

○

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.

○

Connect a drain elbow as shown in the illustration and close the other two drain holes

with grommets.

Drain elbow ( 1 pe.)

Drain grommet

( 2 pes.)

Hard vinyl chloride pipe for general purpose (VP-16)

●

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.

●

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.

●

Connect a pair bearing a common terminal number with an indoor-outdoor connecting wire.

●

In cabling, fasten cables securely with cable clamps so that no external force may work on terminal connections.

●

Grounding terminals are provided in the control box.

●

Always perform grounding system installation work

with the power cord unplugged.

1 2

3 4

1 2

3 4

SW-3-3

OFF

Cooling

operation

Heating

operation

Discharge pressure

(High pressure)

Suction pressure

(Low pressure)

Suction pressure

(Low pressure)

Discharge pressure

(High pressure)

SW-3-4

OFF

----

Printed circuit board LED(The cycles of 5 seconds)

Red LED

Blinking once

4) Failure diagnosis in a test run

Power cable, indoor-outdoor connecting wires

Check power cables for loose contact or disconnection

E34

E40

E49

Charge port of the

gas operation valve

Check joint of the pipe

Model
100V

〜

140V

M4 Screw

○

Do not connect to the grounding wire from another

unit, but install a dedicated wire up to the grounding

wire from the distribution board.

○

Fasten cables and protect the terminal connection

from external force.

○

It is attached on the back side of the service panel.

○

As like the refrigerant pipe, it can be let out in any of

the following directions: side right, front, rear and

downward.

Power source, signal line and ground terminal block

Grounding terminal

Wiring clamp

Wiring diagram

Outgoing cable direction

Always use an earth leakage circuit

breaker designed for inverter circuits

to prevent a faulty operation.

Outdoor unit

Switchgear or Circuit breaker

1 2/N 3

Indoor unit

Remote control

Model 100VN ~ 140VN

100VNX ~ 140VNX

Model 100VS ~ 140VS

100VSX ~ 140VSX

Earth leakage breaker

(Harmonic resistant type)

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);

Do not use anything lighter than 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.

L1 L2 L3

Outdoor unit

Switchgear or Circuit breaker

1 2/N 3

Indoor unit

Remote control

Earth leakage breaker

(Harmonic resistant type)

●

When you leave the outdoor unit with power supplied to it,

be sure to close the panel.

●

Always carry out a test run and check the following in order as listed.

If brazed, was it brazed under a nitrogen gas flow?
Were air-tightness test and vacuum extraction surely performed?
Are heat insulation materials installed on both liquid and gas pipes?
Are operation valves surely opened for both liquid and gas systems?
Have you recorded the additional refrigerant charge volume and refrigerant pipe length on the panel’s label?
Is the unit free of cabling errors such as uncompleted connection, an absent or reversed phase?
Are properly rated electrical equipments used for circuit breakers and cables?
Doesn’t cabling cross-connect between units, where more than one unit are installed?
Aren’t indoor-outdoor signal wires connected to remote control wires?
Do indoor-outdoor connecting cables connect between the same terminal numbers?
Are either VCT cabtyre cables or WF flat cables used for indoor-outdoor connecting cables?
Does grounding satisfy the D type grounding (type III grounding) requirements?
Is the unit grounded with a dedicated grounding wire not connected to another unit’s grounding wire?
Are cables free of loose screws at their connection points?
Are cables held down with cable clamps so that no external force works onto terminal connections?
Is indoor unit installation work completed?
Where a face cover should be attached onto an indoor unit, is the face cover attached to the indoor unit?

Open the gas side operation valve fully.
Open the liquid side operation valve fully.
Close the panel.
Where a remote control unit is used for unit setup on the installation site, follow instructions for unit setup on the installation site with a remote control unit.
SW3-3 ON / SW3-4 OFF: the unit will start a cooling operation.
SW3-3 ON / SW3-4 ON: the unit will start a heating operation.
When the unit starts operation, press the wind direction button provided on the remote control unit to check its operation.
Place your hand before the indoor unit’s diffuser to check whether cold (warm) winds come out in a cooling (heating) operation.
Make sure that a red LED is not blinking.
When you complete the test run, do not forget to turn SW3-3 to the OFF position.
Where options are used, check their operation according to the respective instruction manuals.

①
②
③
④

⑤

⑥
⑦
⑧
⑨
⑩

ー

Test run procedure

Green LED

Blinking continuously

○

VCT cabtyre cable

VVF flat cable

4-core cable

Shield cable

A failure to observe these instructions can result in a compressor breakdown.

Item No.used in the

installation manual

Pipe size

Items to checkbefore a test run

Item

Capacity

Standard refrigerant

charge volume (kg)

Additional charge volume (kg)

per meter of refrigerant piping

(liquid pipe)

Refrigerant volume

charged for shipment

at the factory (kg)

Installation’s pipe length (m)

covered without additional

refrigerant charge

100VN

～

140VN

100VS

～

140VS

100VNX

～

140VNX

100VSX

～

140VSX

2.0

2.7

3.8

4.5

0.06

100VN

～

140VN

100VS

～

140VS

100VNX

～

140VNX

100VSX

～

140VSX

2.0

2.7

3.8

4.5

Pipe length for

standard refrigerant

charge volume (m)

Item

Capacity

Standard refrigerant

charge volume (kg)

Additional charge volume (kg)

per meter of refrigerant piping

(liquid pipe)

Refrigerant volume

charged for shipment

at the factory (kg)

Installation’s pipe length (m)

covered without additional

refrigerant charge

Main pipe

Branch pipe

Formula to calculate additional charge volume

Liquid pipe

9.52

12.7

Gas pipe

15.88

19.05

15.88

19.05

Usability

◎

○※1

△

△※1

Maximum one-way pipe length

Length covered without additional charge

Usability

◎

○※1

△

△※1

Maximum one-way pipe length

Length covered without additional charge

Usability

◎

○※1

△

△※1

Maximum one-way pipe length

Length covered without additional charge

100VN
100VS

125VN
125VS

0.06kg/m

0.08kg/m

140VN
140VS

Are the existing units our products?

Check whether an existing pipe system is reusable or not by using the following flow chart.

Is the existing pipe system to reuse free of corrosion, flaws or dents?

Repair the damaged parts.

Remove those branches.

Repair the damaged parts.

Check the pipe system for air tightness on the site.

Repair the damaged parts.

No loose pipe supports

YES

START

The existing pipe system is reusable.

The existing pipe system is not reusable.

Install a new pipe system.

YES

Are an outdoor unit and an indoor unit connected to the
existing pipe system to reuse?

Is the unit to install in the existing pipe system a
twin-triple-double-twin model?

Is the existing pipe system to reuse free of gas leaks?

(Check whether refrigerant charge was required frequently for

the system before)

Are heat insulation materials of the existing pipe system to

reuse free of peel-offs or deterioration?

(Heat insulation is necessary for both gas and liquid pipes)

Are there any branch pipes with no indoor unit connected?

Change the branching pipe to a specified type.

Aren’t there any loose pipe supports?

Does the existing pipe system to reuse satisfy all of the following?

(1) The pipe length is 50m or less.

(2) The pipe size conforms to the table of pipe size restrictions.

(3) The elevation difference between the indoor and outdoor units

conforms to the following restrictions.

Where the outdoor unit is above: 30m or less

Where the outdoor unit is below: 15m or less

Which of the following refrigeration oils

does the existing unit use?

Suniso, MS, Barrel Freeze, HAB, Freol,

ether oil, ester oil

Make an inquiry

for reusability.

※

Check with the flow chart developed for a case where

an existing pipe system is reused for a

twin-triple-double-twin model published as a

technical data sheet.

The branching pipes used with models other than those listed above are not reusable because of their insufficient

pressure resistance. Please use our genuine branching pipes for R410A.

●

＊＊＊

are numbers representing horsepower.

□ □ □

is an alphanumeric letter.

Change

Change is impossible.

Can Use

Can‘t

Use

Repair is impossible.

Air tightness is

impossible.

Remove is
impossible

Repair is impossible.

Repair

Some loose pipe supports

Air tightness is OK

Remove

◎:

Standard pipe size

○:

Usable

△:

Restricted to shorter pipe length limits

×:

Not usable

Carry out the following steps with the excising unit

(in the order of (1), (2), (3) and (4))

(1)  Run  the  unit  for  30  minutes  for  a  cooling  operation.
(2)  Stop  the  indoor  fan  and  run  the  unit  for  3  minutes  for  a  cooling  operation  (returning  liquid)
(3)  Close  the  liquid  side  operation  valve  of  the  outdoor  unit  and  pump  down  (refrigerant  recovery)
(4)  Blow  with  nitrogen  gas.

※

If discolored refrigeration oil or any foreign matters is discharged by the blow,

wash the pipe system or install a new pipe system.

●

For the flare nut, do not use the old one, but use the one supplied with the outdoor unit.

Process a flare to the dimensions specified for R410A.

●

Turn on-site setting switch SW5-1

to the ON position. (Where the gas pipe size is

19.05)

Wash the pipe system or install a new pipe system.

●

If you choose to wash the pipe system, contact our distributor in the area.

Models later than Type 8.

●

F D C

＊＊＊

□ □ □

●

F D C P

＊＊＊

□ □ □

Additional charge volume (kg) = {Main pipe length (m) – Length covered without additional charge shown in the table (m)}

Additional charge volume per meter of pipe shown in the table (kg/m)

＋

Total length of branch pipes (m)

Additional charge volume per meter of pipe shown in the table (kg/m)

※

If you obtain a negative figure as a result of calculation, no additional refrigerant needs to be charged.

Example)

When an 140V (single installation) is installed in a 20m long existing pipe system (liquid

12.7, gas

19.05),

the quantity of refrigerant to charge additionally should be (20m-15m) x 0.08kg/m = 0.4 kg.

Model

Power source

Power cable thickness(mm

)

MAX. over current (A) Cable length (m) Grounding wire thickness

100VN

～

140VN

100VNX

125VNX,140VNX

100VS

～

140VS

100VSX

～

140VSX

5.5

1.6mm

3.5

1.6mm x 3

3 phase 4 wire

380V 50Hz

Single phase 3 wire

220-240V 50Hz

220V 60Hz

Indoor-outdoor wire thickness

number

Model

Power source

Power cable thickness(mm

)

MAX. over current (A) Cable length (m) Grounding wire thickness

100VN,100VNX

125VN
140VN

125VNX
140VNX

100VS,100VSX
125VS,125VSX
140VS,140VSX

5.5

1.6mm

25
27
28
29
30
16
18
19

24
22
32
31
30
26
23
21

3.5

3 phase 4 wire

380-415V 50Hz

380V 60Hz

Single phase 3 wire

220-240V 50Hz

220V 60Hz

Indoor-outdoor wire thickness

number

●

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, follow the internal cabling regulations. Adapt it to the regulation in effect in each

country.

※

At the connection with the duct type indoor unit.

●

To charge refrigerant again, recover refrigerant from the system first and then charge the volume calculated from the above table (Standard refrigerant charge branch pipes charge volume)

Heed the following on the first operation after turning on the circuit breaker.

This outdoor unit may start in the standby mode (waiting for a compressor startup), which can continue up to 30 minutes, to prevent the oil

level in the compressor from lowering on the first operation after turning on the circuit breaker. If that is the case, do not suspect a unit failure.

PSB012D955F

Pipe size

Liquid pipe

Gas pipe

After 1st branch

After 2nd branch

Additional charging amount of refrigerant per 1m

Twin
Twin
Twin

Triple A
Triple B

Combination type

0.06kg/m

9.52

12.7

15.88

19.05

◎
◎
×
◎
×

○
○
◎
○
◎

×
×
○
×
○

9.52

12.7

15.88

ー
ー
ー
ー
◎

ー
ー
ー
ー
○

ー
ー
ー
ー
×

50+50
60+60
71+71

50+50+50
50+50+50

Combination of capacity

Model

100V
125V

140V

Additional charging amount of refrigerant per 1m

Pipe size

Liquid pipe

Gas pipe

Usability

Maximum one-way pipe length

Length covered without additional charge

Usability

Maximum one-way pipe length

Length covered without additional charge

Usability

Maximum one-way pipe length

Length covered without additional charge

12.7

19.05

△※1

12.7

15.88

△

9.52

19.05

○※1

100

○※1

100

○※1

100

9.52

15.88

◎

100

◎

100

◎

100

6.35

15.88

△

100VNX
100VSX

125VNX
125VSX

0.06kg/m

0.02kg/m

0.08kg/m

140VNX
140VSX

Additional charging amount of refrigerant per 1m

※

1 Because of its insufficient pressure resistance,

turn the dip switch SW5-1

provided on the outdoor unit board to the ON position for

19.05

t1.0.

(In the case of a twin-triple-double-twin model, this also applies to the case where

19.05

t1.0 is used in a pipe system after the first branching point.)

However, you need not turn the dip switch SW5-1 to the ON position, if 1/2H pipes or pipes having 1.2 or thicker walls are used.

※

2 When the main pipe length exceeds 40m, a significant capacity drop may be experienced due to pressure loss in the liquid pipe system. Use

12.7 for

the liquid main.

※

3 Keep the total pipe length, not one-way pipe length, below the specified maximum pipe length.

※

4 Piping size after branch should be equal or smaller than main pipe size.

※

5 Piping size from first branch to indoor unit should be

9.52 (Liquid) /

12.7 (Gas).

●

When refrigerant piping is shoter than 3m, reduce refrigerant by 1kg from factory charged volume.

●

Any combinations of pipe sizes not listed in the table or marked with

in the table are not usable.

※1

19.05

※1

※

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

Pressurize

Outdoor unit

Indoor unit

How to remove the service panel

Catch

First remove the five screws ( mark) of the service panel and push it down into the direction of

the arrow mark and then remove it by pulling it toward you.

●

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.

●

The pipe can be laid in any of the following directions: side right, front, rear and downward.

●

Remove a knock-out plate provided on the pipe penetration to open a minimum necessary area and attach an edging

material supplied as an accessory by cutting it to an appropriate length before laying a pipe.

●

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.

4) On-site piping work

IMPORTANT

Flared pipe end: A (mm)

6.35

9.52

12.7

15.88

Copper

pipe outer

diameter

ー

．

Ａ

．

16.6
19.7

Copper pipe protrusion for flaring: B (mm)

6.35

9.52

12.7

15.88

Copper

pipe outer

diameter

In the case of a rigid (clutch) type

With an R410A tool With a conventional tool

〜

0.5

0.7

〜

1.3

For downward connection

For side right connection

For front connection

For rear connection

CAUTION

Do not apply force beyond proper fastening torque in tightening
the flare nut.

Fix both liquid and gas service 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)

6.35 (1/4")

9.52 (3/8")

12.7 (1/2")

15.88 (5/8")

〜

150
200
250
300

●

Tighten a flare joint securely with a double spanner.

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)

Do not hold the valve cap area with a spanner.

Catch

Wiring guide