Mitsubishi Heavy Industries FDC1000KXZWE1, Service Manual

 '14 • KX-SM-200

– 

125

 –

Normally, it is desirable that a
foundation as specified in the drawing
above is provided.

It cannot be installed on a foundation 
which is supported at four corners.

Base

Unit base

Vibration

isolating rubber

57

780

468

156

156

510

57

57

584

624

20

20

CAUTION

It must be installed indoors (machine room, etc.).
This unit is not designed for outdoor specifications.

MITSUBISHI HEAVY INDUSTRIES, LTD.   

WATER HEAT SOURCE MULTI AIR CONDITIONER

KXZW SERIES INSTALLATION MANUAL

Notabilia as a unit designed for R410A

a)
b)
c)
d)
e)

f)

g)
h)

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

CAUTION

ACCESSORY

  ●

Please read this manual without fail before you set to installation work and carry it out according to this manual.

  ●

This unit is heat pump system only. It is not possible to be used as heat recovery system.

  ●

A heat source water circulation system is required to operate this unit.

  ●

For the installation of an indoor unit, please refer to the installation manual of an indoor unit.

  ●

For piping work, option distribution parts (branching pipe set, header set) are necessary.  Please refer to our catalog, etc.

  ●

Never fail to install an earth leakage breaker. (Please use one tolerable to harmonic components)

  ●

Operating the unit with the outlet pipe thermistor, the inlet pipe thermistor, the pressure sensor, etc. removed can result in a compressor burnout.  Avoid operation 

under such conditions in any circumstances.

  ●

With this air-conditioning system, room temperature may rise, depending on installation conditions, while indoor units are stopped, because small quantity of 

refrigerant flows into the stopped indoor units if heating operation is conducted on the system. 

COMBINATION PATTERNS

The same heat source unit is used whether it is used alone or in combination with another unit.

  ●

Please note that an installation involving a combination other than those listed below is not operable. 

● 

The possible heat source unit combinations and the number and the total capacity of indoor units that can be connected in a system are shown in the table below.

● 

Please always use indoor units designed exclusively for R410A. For connectable indoor unit model names, please check with our catalog, etc.

● 

It can be used in combination with the following indoor unit.

Name

Wiring

Instruction manual

Accessory pipe 

P224:2

P280:4

P335:1

Gasket

Reducer pipe

Quantity

2

1

1

1

Usage location

In operating the unit in the silent mode or the forced cooling/heating 
operation mode, insert it to the heat source unit board

'

s CNG.

It is supplied with the unit.  You can find 
it taped inside the control box.

Included in this installation manual set

Fixed to the drain pan in the unit with 

tapes.

When the installation work is completed,
give instructions to the customer and ask him/her to keep it.

Use for connection to high/low gas line.

Use for flange connection of the accessory pipe.

Use for connection to the heat source unit side branching pipe set on the 
unit which combines heat source units.

Attached on the top panel.

Band

4

Use to bind the power source cable to clamps.

◎

This installation manual deals with heat source units and general installation specifications only.  For indoor units, please refer to the respective installation manuals 

supplied with your units.

◎

Please read this manual carefully before you set to installation work and carry it out according to the instructions contained in this manual.

Designed for R410A refrigerant

Please note

a) It must be installed indoors (machine room, etc.).
b) When installing multiple units, provide sufficient intake space so that a short-circuit does not occur.
c) Do not install the equipment in areas where there is a danger for potential explosive atmosphere.

[Water quality standards]*

5

Makeup water and cyclic water shall be the water within the range of water quality standards mentioned below.
If water quality is out of the range of standards, it may cause a trouble such as scale adhesion and corrosion.

2.

INSTALLATION LOCATION

(Obtain approval from the customer when selecting the installation area.)

〇

 Where a vent hole or air vent, capable of dissipating heat generating from the unit sufficiently, 

is provided and where ambient temperatures are within a range of 0-40˚C and humidity does 
not exceed 80%RH around the unit.

〇

 Where the installation fittings can be firmly installed.

〇

 Out of the heat range of other heat sources.

〇

 A place where stringent regulation of electric noises is not applicable.

〇

 Do not install the unit in places which:

     exposed to see breeze (e.g. coastal area) or calcium chloride (e.g. snow melting agent)
     exposed to ammonia substance (e.g. organic fertilizer)

〇

 This heat source unit must be operated within the following limitation for use.

* Cooling tower and heating tower must be closed circuit type.
  Open circuit type could cause clogging or corrosion on the water heat exchanger in the heat source unit.

Request:

A circuit to interlock with the circulating water pump must be provided to ensure that the heat source unit operates only when the pump is operating.
It is recommended to install a water suspension relay for protection in the event when the water quantity is depleted as a result of faulty operation of valves installed on water pipe lines, air 
sucked accidentally, or other. (See Section 6-4)

*1 The fifteen items in the table represent typical causes of corrosion and scale.
*2 In a condenser water circuit that uses a closed cooling tower, the closed circuit circulating water and makeup water must satisfy its water quality standards for the hot water system and 

passing water and makeup water must satisfy those for the circulation type cooling water system.

*3 Corrosion has a tendency to occur when water temperature is high (40°C or higher), and if metals with no protective coating whatever are directly exposed to water.
     it would be a good idea to take effective measures against corrosion such as adding a corrosion inhibitor or deaeration treatment.
*4 The columns show a factor of corrosion or scale.
*5 The supply water must be clean tap water, industrial water or clean ground water.

〇

 Where water can be drained reliably.

〇

 Where noise will not bother nearby quiet room and neighborhood.

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

 Where wind does not hinder the intake and outlet opening.

〇

 Where strong winds will not blow against the outlet opening.

2-1. Selecting the installation location

Please secure sufficient clearance (room for maintenance work, 
passage, draft and piping).  (If your installation site does not fulfill the 
installation condition requirements set out on this drawing, please 
consult with your distributor or the manufacturer)

2-2. Installation space (service space) example

(2) Base

●

Please install a unit after ascertaining that the bases have been made to sufficient strength and level to ensure the unit against

vibration or noise generation.

●

Please construct a base to the size of a shadowed area (the entire bottom area of heat source unit

'

s base) shown on the above

drawing or larger.

●

Please orient a base in the traversal direction (direction of W780mm) of heat source unit as illustrated in the drawing above.

(3) Vibration isolating rubber

●

A vibration isolating rubber must support heat source unit

'

s base by its entire bottom area.

Please note

a) Install a vibration isolating rubber 

in such a manner that the entire bottom area of a heat source unit’s base will rest on it

.

b) Do not install a heat source unit in such a manner that a part of the bottom area of its base is off a vibration isolating rubber.

L3

L1

L5

Front side of the unit

Service

space

Wall

Wall

Wall

Wall

L4

L2

1     

600 or more

20 or more

500 or more

20 or more

300 or more

L1
L2
L3
L4
L5

Dimensions

Installation example

4. WATER PIPING WORK, DRAINAGE WORK

4-1. Caution for heat source water and water pipes

Precautions for safety

Never do it under any circumstances.

Always do it according to the instruction.

1. BEFORE BEGINNING INSTALLATION 

(Check that the models, power source specifications, piping, wiring are correct.)

Indoor unit 

Remote control

Connection OK/NO

FD

○△△

KXE6

RC-E3(2 cores), RC-E4(2 cores) 

OK

    RC-E5(2 cores), RC-EX1A(2 cores)

FD

○

A

△△

KXE4R, KXE4BR, KXE5R

RC-E1R(3 cores) 

NO

FD

○

A

△△

KXE4, KXE4(A), KXE4A 

RC-E1(3 cores) 

NO

Notabilia

PSC012D032

Heat source unit capacity

FDC224–1000

●

Read these “Precautions for safty” carefully before starting installation work and do it in the proper way.

●

Safety instructions listed here are grouped into        Warnings   and       Cautions.    If a non-compliant installation method is likely to result in a serious consequence such as death 

or major injury, the instruction is grouped into        Warnings  to emphasize its importance. However, a failure to observe a safety instruction listed under        Cautions     can also
result in a serious consequence depending on the circumstances. Please observe all these instructions, because they include important points concerning safety. 

●

The meanings of “Marks” used here are as shown on the right:

●

When you have completed installation work, perform a test run and make sure that the installation is working properly. Then, explain the customer how to operate and how to take 

care of the air-conditioner according to the user’s manual. Please ask the customer to keep this installation manual together with the user’s manual.

●

This unit complies with EN61000-3-3. 

●

For heat source unit, EN61000-3-2 is not applicable as consent by the utility company or notification to the utility company is given before usage.

  ●

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. Please check connectable indoor unit models in a catalog, etc. (A

wrong indoor unit, if connected into the system, will impair proper system operation)

【

Option parts

】

Refrigerant distribution piping components supplied as option parts will become necessary in installing the unit.

As refrigerant distribution piping components, branching pipe sets (model type: DOS) for the heat source unit side piping, branching pipe sets (model type: DIS) 

and header sets (model type: HEAD) for the indoor side piping are available.

Select according to the application. Please refer to Section 5-1 (4)(5).

If you are uncertain, please do not hesitate to consult with your distributor or the manufacturer.

Please use refrigerant branching sets and header sets designed exclusively for R410A without fail.

Capacity

224
280
335
450
500
560
615
670
730
775
850
900
950

1000

Combination patterns

Single
Single
Single

Combination

（

224+224

Combination

（

224+280

Combination

（

280+280

Combination

（

280+335

Combination

（

335+335

Combination

（

224+224+280

Combination

（

224+280+280

Combination

（

280+280+280

Combination

（

280+280+335

Combination

（

280+335+335

Combination

（

335+335+335

 Number of connectable units (units)

1

ー

22

1

ー

28

1

ー

33

1

ー

44

1

ー

50

1

ー

56

2

ー

61

2

ー

67

2

ー

72

2

ー

78

2

ー

80

2

ー

80

2

ー

80

2

ー

80

Range of the total capacity of indoor units connected in a system

112

ー

336

140

ー

420

167

ー

503

224

ー

672

252

ー

756

280

ー

840

307

ー

923

335

ー

1005

364

ー

1092

392

ー

1176

420

ー

1275

447

ー

1343

475

ー

1425

502

ー

1508

Indoor unit

Heat source unit

※ 

When connecting the indoor unit type FDK, FDFL or FDFU series, limit the connectable capacity not higher than130%.

Item

*1

Circulation system

(20°C — 60°C)

Makeup water

Makeup water

Circulation system

Cooling water system

*2

Hot water system

*3

Tendency

*4

Standard items

pH (25°C)

—

6.5 — 8.2

6.0 — 7.0

6.0 — 8.0

Electric conductivity (25°C)

mS/m

≦

80

≦

30

Chloride ion

mgCl

—

/L

≦

200

≦

50

Sulphate ion

mgSO

2

4

–

/L

≦

200

≦

50

Acid consumption (pH4.8)

mgCaCO

3

/L

≦

100

≦

50

—

Total hardness

mgCaCO

3

/L

≦

200

≦

70

Calcium hardness

mgCaCO

3

/L

≦

150

≦

50

Ionic silica

mgSiO

2

/L

≦

50

≦

30

Reference items

Iron

mgFe/L

≦

1.0

≦

0.3

Copper

mgCu/L

≦

0.3

≦

0.1

Sulphide ion

mgS

2–

/L

Not detected

Not detected

Ammonium ion

mgNH

4

+

/L

≦

1.0

≦

0.1

Residual chlorine

mgCl /L

≦

0.3

≦

0.3

Free carbon

mgCO

2

/L

≦

4.0

≦

4.0

Stability index

—

7.0 — 8.0

7.0 — 8.0

≦

30

≦

30

≦

50

≦

50

≦

50

≦

50

≦

50

≦

50

≦

70

≦

70

≦

50

≦

50

≦

30

≦

30

≦

1.0

≦

0.3

≦

1.0

≦

0.1

Not detected

Not detected

≦

0.3

≦

0.1

≦

0.25

≦

0.3

≦

0.4

≦

4.0

—

—

Corrosion

〇
〇
〇
〇

〇
〇
〇
〇
〇
〇
〇

Scale

〇
〇

〇
〇
〇
〇
〇

〇

L3

L1

L5

Front side of the unit

Service

space

Wall

Wall

Wall

L4

1     

600 or more

20 or more

500 or more

20 or more

300 or more

20 or more
20 or more

L1
L2
L3
L4
L5
L6
L7

Dimensions

Installation example

Wall

L7

L6

L2

20

  ●

By defining a cartage path, carry in the entire package containing a unit to its installation point.

  ●

In slinging a unit, use two canvas belts with plates, cloth pads or other protections applied to the unit to prevent damage.

Please note

a) Please do not fail to put belts through the rectangular holes of a unit

'

s base.

b) Apply cloth pads between a canvas belt and a unit to prevent damage.

When a unit is hoisted with slings for haulage, please take into consideration the offset of its gravity center position.
If not properly balanced, the unit can be thrown off-balance and fall.

3-1. Delivery

(1) Anchor bolt positions

  ●

Use four anchor bolts (M10) to fix heat source unit's base at all times.  Ideally, 
an anchor bolt should protrude 20mm.

3-2. Notabilia for installation

3. 

Unit delivery and installation

CAUTION

For your information:

the footprint of heat source 
unit is 780x624 for all models 
throughout the series 
(224–335).

Item

Limitation for use

Inlet water temperature

Water pressure
Water flow rate

Water quality

Heat source water circuit

10°C – 45°C

2 MPa or less

50L/min – 150L/min

See Section 2-1 Water quality standards

Circulation type*

WARNING

CAUTION

●

Use the circuit breaker for all pole with correct  capacity.

Using the incorrect circuit breaker, it can cause the unit malfunction and fire.

●

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 and water 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.

●

For drain piping work, be sure to make descending slope of greater than 1/100, not to make traps and not to make air-purging. 

Check if the drainage is correctly done during test run and ensure the space for inspection and maintenance.

●

Be sure to take measure for anti-freezing.

Without taking measure for anti-freezing, it might cause breakage of water pipe, components or connecting joints in the system.

●

Be sure to perform waterproofing work and indirect wastewater treatment work

Improper treatment might cause serious damage, when water leak occurs.

●

Be sure to perform waterproofing work and drain work in order to prevent from the secondary damage due to the leakage

from water piping.

●

Before servicing the water heat exchanger and water pipes, be sure to drain water by setting the water stop valve to “close”.

There is a risk of electric shock, if water is splashed over electric parts.

●

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 and fire due to short-circuiting. Never connect the grounding wire to a gas pipe

because if gas leaks, it could  cause  explosion  or  ignition.

●

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 heat source unit is installed on a high place, provide permanent ladders and handrails along the access route and fences

and handrails around the heat source 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 heat source units 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

t

Locations where carbon fiber, metal powder or any powder is floating.

t

Locations where any substances that can affect the unit such as sulphide gas, chloride gas, acid and alkaline can occur.

t

Vehicles and ships

t

Locations where cosmetic or special sprays are often used.

t

Locations with direct exposure of oil mist and steam such as kitchen and machine plant.

t

Locations where any machines which generate high frequency harmonics are used.

t

Locations with salty atmospheres such as coastlines

t

Locations where the unit is exposed to chimney smoke

t

Locations at high altitude (more than 1000m high)

t

Locations with ammonic atmospheres (e.g. organic fertilizer)

t

Locations with calcium chloride (e.g. snow melting agent)

t

Locations where heat radiation from other heat source can affect the unit

t

Locations without good air circulation.

t

Locations with any obstacles which can prevent inlet and outlet air of the unit 

t

Locations where short circuit of air can occur (in case of multiple units installation)

t

Locations where strong air blows against the air outlet of heat source unit

It can cause remarkable decrease in performance, corrosion and damage of components, malfunction and fire.

●

Do not install the heat source unit in the locations listed below.

t

Locations where discharged operating sound of the heat source unit can bother nearby quiet room and neighborhood.

t

Locations where outlet air of the heat source unit blows directly to an animal or plants. The outlet air can affect adversely to the plant etc.

t

Locations where vibration can be amplified and transmitted due to insufficient strength of structure.

t

Locations where vibration and operation sound generated by the outdoor unit can affect seriously.

    (on the wall or at the place near bed room)

t

Locations where an equipment affected by high harmonics is placed. (TV set or radio receiver is placed within 5m)

t

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 shut off the power source immediately after stopping the operation.

Wait at least 5 minutes, otherwise there is a risk of water leakage or breakdown.

●

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, substanard performance, contrl 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 source 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.

●

In connecting the power cable, make sure that no anomalies such as dust deposits, socket clogging or wobble are found and

insert the plug securely.

Accumulation of dust, clogging on the socket, or looseness of plugging can cause electric shocks and fire.

●

Be sure not to reuse existing refrigerant pipes

Conventional refrigerant oil or chlorine contained in the conventional refrigerant which is remaining in the existing refrigerant

pipes can cause deterioration of refrigerant oil of new unit. And 1.6 times higher pressure of R410A refrigerant than

conventional one can cause burst of existing pipe, personal injury or serious accident.

●

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.

●

Do not put the drainage pipe directly into drainage channels where poisonous gases such as sulphide gas can occur.

Poisonous gases will flow into the room through drainage pipe and seriously affect the user's health and safety. It can also

cause the corrosion of the indoor unit and resultant unit failure or refrigerant leak.

●

Only use prescribed option 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 source in the event of installation, inspection or servicing.

If the power source 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.

CAUTION

●

Do not control the system with main power switch.

It can cause fire or water leakage. In addition, the fan can start unexpectedly, which can cause personal injury.

●

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 operate the heat source 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 heat source unit.

You may incur injury from a drop or fall.

CAUTION

Please ventilate sufficiently this installation space.