U-140PZ2E8 Air Conditioner Outdoor Unit

Product Information

Specifications

• Model Name: U-100PZ2E5, U-100PZ2E8, U-125PZ2E5, U-125PZ2E8,
  U-140PZ2E5, U-140PZ2E8

• HP: 4 HP, 5 HP, 6 HP

• Refrigerant: R32

Product Usage Instructions

Installation

1. This air conditioner must only be installed or serviced by
   qualified personnel.

2. Before installation, maintenance, or service, refer to
   Commonwealth, State, Territory, and local legislation, regulations,
   codes, installation & operating instructions.

3. Refer to the indoor unit installation instruction manual for
   the indoor unit installation.

4. Hand over this installation instruction manual to the person
   performing the installation and inform the customer to keep it
   properly stored.

5. Refer to the caution items listed in section 5 (REFRIGERANT
   INSTALLATION) for the installation of the refrigerant piping and
   maintain strict control concerning the prevention of mixing
   impurities (water and mineral oils such as Suniso oils) with
   R32.

6. The indoor unit to be connected must be R32 compatible. Check
   the catalogue for available models. Connecting to other indoor
   units may result in improper operation.

Precautions in Terms of Safety

Carry out installation work with reliability after thoroughly
reading this Precaution in terms of safety.

Items that have the potential to result in fatality or serious
injury if wrong installation is carried out are listed in the
column of WARNING. Observe them without fail.

Warnings

• An unventilated area where the appliance using flammable
  refrigerants is installed must be constructed to prevent fire or
  explosion hazards in case of refrigerant leaks.

• The appliance should be stored in a well-ventilated area with
  room size corresponding to the specified operation area.

• Avoid storing the appliance in a room with continuously
  operating open flames or ignition sources.

• Do not sit or step on the unit to avoid accidental falls.

• Avoid installing the outdoor unit near the handrail of a
  veranda, especially in high-rise buildings, to prevent accidents
  caused by climbing on the unit and crossing over the handrail.

• Do not insert fingers or other objects into the fan case to
  prevent injuries and damage to the unit.

• During piping work, do not mix air with refrigeration cycle
  except for the specified refrigerant (R32). Mixing air can cause
  capacity issues, explosion risks, and injuries due to high tension
  inside the refrigerant cycle.

FAQ

Q: Can I install the air conditioner myself?

A: No, this air conditioner must only be installed or serviced
by qualified personnel.

Q: What should I do if I encounter any issues during

installation or service?

A: Refer to Commonwealth, State, Territory, and local
legislation, regulations, codes, installation & operating
instructions for guidance. If needed, contact the manufacturer or a
qualified technician for assistance.

Q: Can I connect this outdoor unit to any indoor unit?

A: No, the indoor unit to be connected must be R32 compatible.
Check the catalogue for available models. Connecting to other
indoor units may result in improper operation.

ENGLISH

ACXF60-30041

INSTALLATION INSTRUCTIONS OUTDOOR UNIT

HP 4 HP 4 HP

MODEL NAME U-100PZ2E5 U-100PZ2E8

HP 5 HP 5 HP

MODEL NAME U-125PZ2E5 U-125PZ2E8

HP 6 HP 6 HP

MODEL NAME U-140PZ2E5 U-140PZ2E8

CAUTION
R32
REFRIGERANT
This Air Conditioner contains and operates with refrigerant R32. THIS PRODUCT MUST ONLY BE INSTALLED OR SERVICED BY QUALIFIED PERSONNEL.
Refer to Commonwealth, State, Territory and local legislation, regulations, codes, installation & operating instructions, before the installation, maintenance and/or service of this product.
Refer to the indoor unit installation instruction manual for the indoor unit installation.
Note: Ensure to hand over this installation instruction manual to the person performing the installation and inform the customer to keep it properly stored.
Refer to the caution items listed in “5.REFRIGERANT INSTALLATION” for the installation of the refrigerant piping and maintain strict control concerning the prevention of mixing impurities (water and mineral oils such as Suniso oils) with R32. The indoor unit to be connected must be R32 compatible and be sure to check the catalogue, etc. for available models. The product may not operation properly if connected to other indoor units.

PRECAUTIONS IN TERMS OF SAFETY

Carry out installation work with reliability after thorough reading of this “Precaution in terms of safety”.

· Precautions shown here are differentiated between

and

.

Those that have much chances for leading to significant result such as fatality or serious injury

if wrong installation would have been carried out are listed compiling them especially into the

column of

.

However, even in the case of items which are listed in the column of

, such

items also have a chance for leading to significant result depending on the situations. In either

case, important descriptions regarding the safety are listed, then observe them without fail.

· As to indications with illustration.

This mark means “CAUTION” or “WARNING”.

This mark means “protective earth”.

The items to be followed are classified by symbols:

Symbol with white background denotes item that is PROHIBITED.

Symbol with dark background denotes item that must be carried out.
· After installation work has been completed, do not only make sure that the unit is free from any abnormal condition through the execution of try run but also explain how to use and how to perform maintenance of this unit to the customer according to the operating instructions. In addition, request the customer to keep this installation instructions for installation work together with operating instructions.
WARNING
Do not use means to accelerate the defrosting process or to clean, other than those recommended by the manufacturer. The appliance shall be stored in a room without continuously operating ignition sources (for example: open flames, an operating gas appliance or an operating electric heater.) Do not pierce or burn. Be aware that refrigerants may not contain an odour. Appliance shall be installed, operated and stored in a room with a floor area larger than (Amin) m2. As for (Amin), see the section “Check of Density Limit”.
An unventilated area where the appliance using flammable refrigerants is installed shall be so constructed that should any refrigerant leak, it will not stagnate so as to create a fire or explosion hazard.
The appliance shall be stored in a well-ventilated area where the room size corresponds to the room area as specified for operation.
The appliance shall be stored in a room without continuously operating open flames (for example an operating gas appliance) and ignition sources (for example an operating electric heater).
Do not sit or step on the unit, you may fall down accidentally.
Do not install outdoor unit near handrail of veranda. When installing air- conditioner unit on veranda of a high rise building, child may climb up to outdoor unit and cross over the handrail causing an accident.
Do not insert your fingers or other objects into the FAN CASE, you may be injured and the unit may be damaged.
When performing piping work do not mix air except for specified refrigerant (R32) in refrigeration cycle. It causes capacity down, and risk of explosion and injury due to high tension inside the refrigerant cycle.
Do not add or replace refrigerant other than specified type. It may cause product damage, burst and injury etc.
Do not clean inside the indoor and outdoor units by users. Engage authorized dealer or specialist for cleaning.
In case of malfunction of this appliance, do not repair by yourself. Contact to the sales dealer or service dealer for a repair.
Must not use other parts except original optional parts described in catalogue and manual.
The appliance shall be stored so as to prevent mechanical damage from occurring.
Keep plastic bag (packaging material) away from small children, it may cling to nose and mouth and prevent breathing.
The appliance must be installed by technician, who takes into account the requirements given by ISO 5149 or eventual equivalent requirements.
As to installation, request the distributor or vendor to perform it. Imperfection in installation caused by that having been carried out by the customer himself may lead to water leakage, electric shock, fire, etc.
Carry out the installation work with reliability according to this manual for installation work. Imperfection in installation leads to water leakage, electric shock, fire, etc.
Carry out the installation work with reliability on the place that can bear the weight of this unit sufficiently. Insufficient strength leads to injury due to falling of the unit.
Carry out predetermined installation work in preparation for strong wind such as typhoon, earthquake. Imperfection in installation work may lead to accidents arising from overturn, etc.
If installing inside a small room, measures should be taken to prevent refrigerant levels from building up to critical concentrations in the event of a refrigerant leak occurring. Please discuss with the place of purchase for advice on what measures may be necessary to prevent critical concentrations being exceeded. If the refrigerant leaks and reaches critical concentration levels, there is the danger that death from suffocation may result. Be careful when picking up and moving the indoor and outdoor units. Get a partner to help, and bend your knees when lifting to reduce strain on your back. Sharp edges or thin aluminum fins on the air conditioner can cut your fingers.
During pump-down operation must stop the compressor before disconnecting the piping installation. (Disconnecting the refrigerant piping, while the compressor is operating with the 3-way valve opened, leads to air intake and an abnormal high pressure in the refrigerant cycle which can cause an explosion and / or injury.)

During installation, ensure that the refrigerant piping is installed before operating the compressor. (Do not install the refrigerant piping while the compressor is operating with the 3-way valve opened, as this leads to air intake and an abnormal high pressure in the refrigerant cycle which may cause an explosion and / or injury.)
If refrigerant gas escaped during installation, ventilate the affected area. If the refrigerant gas comes into contact with sparks or naked flames, it will cause toxic gases to be generated.
The unit must be installed in accordance with applicable national and local regulations. Any electrical work should only be carried out by qualified technician and use exclusive circuits without fail. Presence of insufficient capacity in power circuit or imperfection in execution leads to electric shock, fire, etc.
Wiring shall be connected securely using specified cables and fix them securely so that external force of the cables may not transfer to the terminal connection section. Imperfect connection and fixing leads to fire, etc.
Securely attach the protective covers for the outdoor unit connection cables and power cord so that they do not lift up after installation. If the covers are not properly attached and installed, the terminal connections may overheat and fire or electric shock may result.
Switch off all supplies before accessing any electrical part.
Improper fixing of screw may cause leakage current and electrical shock.
Earth This equipment must be properly earthed. Earth line must not be connected to gas pipe, water pipe, lightning rod and telephone. Otherwise, it may cause electrical shock in case the equipment breakdown or has leakage current.
Provide a power outlet exclusively for each unit, and full disconnection means having a contact separation in all poles must be incorporated in the fixed wiring in accordance with the wiring rules.
Installation of Earth Leakage Current Breaker This equipment must be installed with earth leakage current breaker. Otherwise, it may cause electrical shock and fire in case the equipment breakdown or has leakage current.
Cables connected to outdoor unit must be approved polychloroprene sheathed type 60245 IEC 57 or H05RN-F/H07RN-F or heavier.
The units must be connected to the supply cables for fixed wiring by qualified technician.
Circuit breaker must be incorporated in the fixed wiring in accordance with the national wiring regulations.
The circuit breaker must be approved, suitable for the voltage and current ratings of equipment and have a contact separation by 3mm in all poles. When the supply cable is damaged, it must be replaced by qualified technician.
Be sure to install a current leakage breaker, main switch and fuse to the main power supply, otherwise electric shock may result.
Once installation work is completed, check that there are no refrigerant gas in the room that can come into contact with sparks or flames from a fan heater, stove or kitchen range, which will cause toxic gases to be generated.
CAUTION
Do not install the unit at the place where the possibility of inflammable gas leakage exists. If such gas leakages should arise and the gas builds up around the unit, such situation may lead to ignition.
Do not touch the air inlet or the sharp aluminium fin, you may get injured.
Be sure that the shield part of the shielded cable does not touch the terminal block or any live parts. Failure to do so may lead to electric shock or fire.
Drain piping should be made to ensure secure drainage according to the manual for installation work and carry out the thermal insulation to prevent the occurrence of condensation. Imperfection in piping work leads to water leakage and may cause the house and property, etc. to become wet.
Position the indoor unit and outdoor unit, power cords and indoor / outdoor unit connection cables in a way so that they are at least 1 meter away from televisions and radios. This is to avoid problems such as interference with picture and / or sound. (However, note that depending on the electromagnetic wave conditions, interference may still occur even if the separation distance is more than 1 meter.)
When fixing the product with an overturn prevention wire, care should be taken to choose a place where no one trips over the fixing wire.
Before wiring confirm the rated voltage of the unit as shown on its nameplate, then carry out the wiring closely following the wiring diagram.
PRECAUTION FOR USING R32 REFRIGERANT
· The basic installation work procedures are the same as conventional refrigerant (R410A, R22) models. However, pay careful attention to the following points:
WARNING
Since the working pressure is higher than that of refrigerant R22 models, some of the piping and installation and service tools are special. Especially, when replacing a refrigerant R22 model with a new refrigerant R32 model, always replace the conventional piping and flare nuts with the R32 and R410A piping and flare nuts on the outdoor unit side. For R32 and R410A, the same flare nut on the outdoor unit side and pipe can be used.
Models that use refrigerant R32 and R410A have a different charging port thread diameter to prevent erroneous charging with refrigerant R22 and for safety. Therefore, check beforehand.
Be more careful than R22 so that foreign matter (oil, water, etc.) does not enter the piping. Also, when storing the piping, securely seal the opening by pinching, taping, etc. (Handling of R32 is similar to R410A.)
CAUTION
1. Installation (Space) · That the installation of pipe-work shall be kept to a minimum. · Must ensure that pipe-work shall be protected from physical damage. · That compliance with national gas regulations shall be observed. · Must ensure mechanical connections be accessible for maintenance purposes. · In cases that require mechanical ventilation, ventilation openings shall be kept clear of obstruction. · When disposal of the product, do follow to the precautions in #12 and comply with national regulations.
Always contact to local municipal offices for proper handling.
2. Servicing
2-1. Service personnel · Any qualified person who is involved with working on or breaking into a refrigerant circuit should hold
a current valid certificate from an industry-accredited assessment authority, which authorizes their competence to handle refrigerants safely in accordance with an industry recognised assessment specification.

· Servicing shall only be performed as recommended by the equipment manufacturer. Maintenance and repair requiring the assistance of other skilled personnel shall be carried out under the supervision of the person competent in the use of flammable refrigerants.
· Servicing shall be performed only as recommended by the manufacturer.
2-2. Work
· Prior to beginning work on systems containing flammable refrigerants, safety checks are necessary to ensure that the risk of ignition is minimised. For repair to the refrigerating system, #2-3 to #2-7 shall be completed prior to conducting work on the system.
· Work shall be undertaken under a controlled procedure so as to minimise the risk of a flammable gas or vapour being present while the work is being performed.
2-3. General work area
· All maintenance staff and others working in the local area shall be instructed on the nature of work being carried out.
· Work in confined spaces shall be avoided. · The area around the workspace shall be sectioned off. · Ensure that the conditions within the area have been made safe by control of flammable material.
2-4. Checking for presence of refrigerant
· The area shall be checked with an appropriate refrigerant detector prior to and during work, to ensure the technician is aware of potentially toxic or flammable atmospheres.
· Ensure that the leak detection equipment being used is suitable for use with all applicable refrigerants, i.e. non-sparking, adequately sealed or intrinsically safe.
2-5. Presence of fire extinguisher
· If any hot work is to be conducted on the refrigeration equipment or any associated parts, appropriate fire extinguishing equipment shall be available to hand.
· Have a dry powder or CO2 fire extinguisher adjacent to the charging area.
2-6. No ignition sources
· No person carrying out work in relation to a refrigeration system which involves exposing any pipe work shall use any sources of ignition in such a manner that it may lead to the risk of fire or explosion.
· All possible ignition sources, including cigarette smoking, should be kept sufficiently far away from the site of installation, repairing, removing and disposal, during which refrigerant can possibly be released to the surrounding space.
· Prior to work taking place, the area around the equipment is to be surveyed to make sure that there are no flammable hazards or ignition risks.
· “No Smoking” signs shall be displayed.
2-7.Ventilated area
· Ensure that the area is in the open or that it is adequately ventilated before breaking into the system or conducting any hot work.
· A degree of ventilation shall continue during the period that the work is carried out. · The ventilation should safely disperse any released refrigerant and preferably expel it externally into
the atmosphere.
2-8. Checks to the refrigeration equipment
· Where electrical components are being changed, they shall be fit for the purpose and to the correct specification.
· At all times the manufacturer’s maintenance and service guidelines shall be followed. · If in doubt, consult the manufacturer’s technical department for assistance.
– The charge size is in accordance with the room size within which the refrigerant containing parts are installed;
– The ventilation machinery and outlets are operating adequately and are not obstructed; – Marking to the equipment continues to be visible and legible. Markings and signs that are illegible
shall be corrected; – Refrigeration pipe or components are installed in a position where they are unlikely to be exposed
to any substance which may corrode refrigerant containing components, unless the components are constructed of materials which are inherently resistant to being corroded or are suitably protected against being so corroded.
2-9. Checks to electrical devices
· Repair and maintenance to electrical components shall include initial safety checks and component inspection procedures.
· If a fault exists that could compromise safety, then no electrical supply shall be connected to the circuit until it is satisfactorily dealt with.
· If the fault cannot be corrected immediately but it is necessary to continue operation, an adequate temporary solution shall be used.
· This shall be reported to the owner of the equipment so all parties are advised. · Initial safety checks shall include:
– That no live electrical components and wiring are exposed while charging, recovering or purging the system;
– That there is continuity of earth bonding.
3. Repairs to sealed components · During repairs to sealed components, all electrical supplies shall be disconnected from the
equipment being worked upon prior to any removal of sealed covers, etc. · Particular attention shall be paid to the following to ensure that by working on electrical components,
the casing is not altered in such a way that the level of protection is affected. This shall include damage to cables, excessive number of connections, terminals not made to original specification, damage to seals, incorrect fitting of glands, etc. · Ensure that apparatus is mounted securely. · Ensure that seals or sealing materials have not degraded to the point that they no longer serve the purpose of preventing the ingress of flammable atmospheres. · Replacement parts shall be in accordance with the manufacturer’s specifications.
NOTE: The use of silicon sealant can inhibit the effectiveness of some types of leak detection equipment. Intrinsically safe components do not have to be isolated prior to working on them.
4. Repair to intrinsically safe components · Do not apply any permanent inductive or capacitance loads to the circuit without ensuring that this
will not exceed the permissible voltage and current permitted for the equipment in use. · Intrinsically safe components are the only types that can be worked on while live in the presence of
a flammable atmosphere. The test apparatus shall be at the correct rating. · Replace components only with parts specified by the manufacturer. · Other parts may result in the ignition of refrigerant in the atmosphere from a leak.
5. Cabling · Check that cabling will not be subject to wear, corrosion, excessive pressure, vibration, sharp
edges or any other adverse environmental effects. · The check shall also take into account the effects of aging or continual vibration from sources
such as compressors or fans.
6. Detection of flammable refrigerants · Under no circumstances shall potential sources of ignition be used in the searching for or detection
of refrigerant leaks. · A halide torch (or any other detector using a naked flame) shall not be used.
7. Leak detection methods · Electronic leak detectors may be used to detect refrigerant leaks but, in the case of flammable
refrigerants, the sensitivity may not be adequate, or may need re-calibration. (Detection equipment shall be calibrated in a refrigerant-free area.)

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· Ensure that the detector is not a potential source of ignition and is suitable for the refrigerant used. · Leak detection equipment shall be set at a percentage of the LFL of the refrigerant and shall be calibrated
to the refrigerant employed, and the appropriate percentage of gas (25 % maximum) is confirmed. · Leak detection fluids are suitable for use with most refrigerants but the use of detergents containing
chlorine shall be avoided as the chlorine may react with the refrigerant and corrode the copper pipe-work. · If a leak is suspected, all naked flames shall be removed/extinguished. · If a leakage of refrigerant is found which requires brazing, all of the refrigerant shall be recovered from the
system, or isolated (by means of shut off valves) in a part of the system remote from the leak. For appliances containing flammable refrigerants, oxygen free nitrogen (OFN) shall then be purged through the system both before and during the brazing process.

8. Removal and evacuation · When breaking into the refrigerant circuit to make repairs-or for any other purpose-conventional
procedures shall be used. However, it is important that best practice is followed since flammability is a consideration.The following procedure shall be adhered to: · remove refrigerant; · purge the circuit with inert gas; · evacuate; · purge again with inert gas; · open the circuit by cutting or brazing. · The refrigerant charge shall be recovered into the correct recovery cylinders. · The system shall be “flushed” with OFN to render the unit safe. This process may need to be repeated several times. · Compressed air or oxygen shall not be used for purging refrigerant systems. · Flushing shall be achieved by breaking the vacuum in the system with OFN and continuing to fill until the working pressure is achieved, then venting to atmosphere, and finally pulling down to a vacuum. · This process shall be repeated until no refrigerant is within the system. · When the final OFN charge is used, the system shall be vented down to atmospheric pressure to enable work to take place. · This operation is absolutely vital if brazing operations on the pipe- work are to take place. · Ensure that the outlet for the vacuum pump is not close to any ignition sources and that ventilation is available.
9. Charging procedures · In addition to conventional charging procedures, the following requirements shall be followed.
– Ensure that contamination of different refrigerants does not occur when using charging equipment.
– Hoses or lines shall be as short as possible to minimize the amount of refrigerant contained in them.
– Cylinders shall be kept upright.
– Ensure that the refrigeration system is earthed prior to charging the system with refrigerant.
– Label the system when charging is complete (if not already).
– Extreme care shall be taken not to over fill the refrigeration system. · Prior to recharging the system it shall be pressure tested with OFN (refer to

7). · The system shall be leak tested on completion of charging but prior to

commissioning. · A follow up leak test shall be carried out prior to leaving the site. · Electrostatic charge may accumulate and create a hazardous condition when charging and
discharging the refrigerant. To avoid fire or explosion, dissipate static electricity during transfer by grounding and bonding containers and equipment before charging/discharging.

10. Decommissioning · Before carrying out this procedure, it is essential that the technician is completely familiar with the
equipment and all its detail. · It is recommended good practice that all refrigerants are recovered safely. · Prior to the task being carried out, an oil and refrigerant sample shall be taken in case analysis is
required prior to re-use of reclaimed refrigerant. · It is essential that electrical power is available before the task is commenced.

a) Become familiar with the equipment and its operation.
b) Isolate system electrically.
c) Before attempting the procedure ensure that:
· mechanical handling equipment is available, if required, for handling refrigerant cylinders;
· all personal protective equipment is available and being used correctly;
· the recovery process is supervised at all times by a competent person;
· recovery equipment and cylinders conform to the appropriate standards.
d) Pump down refrigerant system, if possible.
e) If a vacuum is not possible, make a manifold so that refrigerant can be removed from various parts of the system.

f) Make sure that cylinder is situated on the scales before recovery takes place.
g) Start the recovery machine and operate in accordance with manufacturer’s instructions.
h) Do not overfill cylinders. (No more than 80 % volume liquid charge).
i) Do not exceed the maximum working pressure of the cylinder, even temporarily.
j) When the cylinders have been filled correctly and the process completed, make sure that the cylinders and the equipment are removed from site promptly and all isolation valves on the equipment are closed off.
k) Recovered refrigerant shall not be charged into another refrigeration system unless it has been cleaned and checked.

· Electrostatic charge may accumulate and create a hazardous condition when charging or discharging the refrigerant. To avoid fire or explosion, dissipate static electricity during transfer by grounding and bonding containers and equipment before charging/discharging.
11. Labelling · Equipment shall be labelled stating that it has been de- commissioned and emptied of refrigerant. · The label shall be dated and signed. · Ensure that there are labels on the equipment stating the equipment contains flammable refrigerant.
12. Recovery · When removing refrigerant from a system, either for servicing or decommissioning, it is
recommended good practice that all refrigerants are removed safely. · When transferring refrigerant into cylinders, ensure that only appropriate refrigerant recovery
cylinders are employed. · Ensure that the correct number of cylinders for holding the total system charge are available. · All cylinders to be used are designated for the recovered refrigerant and labelled for that refrigerant
(i.e. special cylinders for the recovery of refrigerant). · Cylinders shall be complete with pressure-relief valve and associated shut-off valves in good
working order. · Empty recovery cylinders are evacuated and, if possible, cooled before recovery occurs. · The recovery equipment shall be in good working order with a set of instructions concerning the
equipment that is at hand and shall be suitable for the recovery of all appropriate refrigerants including, when applicable, flammable refrigerants. · In addition, a set of calibrated weighing scales shall be available and in good working order. · Hoses shall be complete with leak-free disconnect couplings and in good condition. · Before using the recovery machine, check that it is in satisfactory working order, has been properly maintained and that any associated electrical components are sealed to prevent ignition in the event of a refrigerant release. Consult manufacturer if in doubt. · The recovered refrigerant shall be returned to the refrigerant supplier in the correct recovery cylinder, and the relevant waste transfer note arranged. · Do not mix refrigerants in recovery units and especially not in cylinders. · If compressors or compressor oils are to be removed, ensure that they have been evacuated to an acceptable level to make certain that flammable refrigerant does not remain within the lubricant. · The evacuation process shall be carried out prior to returning the compressor to the suppliers. · Only electric heating to the compressor body shall be employed to accelerate this process. · When oil is drained from a system, it shall be carried out safely.

Explanation of symbols displayed on the indoor unit or outdoor unit.

WARNING

This symbol shows that this equipment uses a flammable refrigerant. If the refrigerant is leaked, together with an external ignition source, there is a possibility of ignition.

CAUTION This symbol shows that the Operating Instructions should be read carefully.

CAUTION CAUTION

This symbol shows that a service personnel should be handling this equipment with reference to the Technical Manual.
This symbol shows that there is information included in the Operating Instructions and/or Installation Instructions.

Check of Density Limit
The refrigerant (R32), which is used in the air conditioner, is a flammable refrigerant. So the requirements for installation space of appliance are determined according to the refrigerant charge amount (mc) used in the appliance.

The minimum indoor floor space compared with the amount of refrigerant is roughly as follows: (Installation height: 2.5m).

*U-100PZ2E5,U-100PZ2E8 Can not be installed

mc 1.22

: Can be installed

1.22 < mc mmax : Installation possible with in

the range of slanted line part

mc > mmax

: Can not be installed

· 3.50 indicates mmax digit of the model U-100PZ2E5, U-100PZ2E8. · 3.88 indicates mmax digit of the model U-125PZ2E5, U-125PZ2E8 and U-140PZ2E5, U-140PZ2E8.
mc : The refrigerant charge amount (Total of refrigerant at shipment and refrigerant charge amount in the field). · Please calculate mc according to piping length in the field as shown in the calculation example below.

mc = 1 + 2 = 1 + (3(4­5)) = 2.60 + (0.045 (40 m ­ 30 m) = 3.05

1: Refrigerant charged at shipment 2: Refrigerant charge amount in the field 3: Additional charge per 1m

4: Total pipe length

5: Charge-less pipe length(max.)

· If the total piping length is within the maximum value of the charge-less piping length, refrigerant charge in the field is unnecessary.
mmax : The maximum refrigerant charge amount

mmax

U-100PZ2E5, (8) 3.50

U-125PZ2E5, (8) U-140PZ2E5, (8)
3.88

1. ACCESSORIES SUPPLIED WITH OUTDOOR UNIT

The following parts are supplied as accessories with each outdoor unit. Check that all accessory parts are present before installing the outdoor unit.

Part name

Q’ty

Diagram

Application

Part name

Q’ty Diagram

Application

Protective bushing

2

Banding strap

4

For protecting electrical wires For tying electrical wires together

Installation Instruction 1 Installation Instruction

SIZE:A3

CONNECTION FOR DEMAND AND FORCED STOP This manual

Please install according to WarningCaution on page1.

2. SELECT THE OUTDOOR UNIT INSTALLATION LOCATION

Warning

Be careful when picking up and moving the indoor and outdoor units. Get a partner to help, and bend your knees when lifting to reduce strain on your back. Sharp edges or thin aluminum fins on the air conditioner can cut your fingers.

1. Install the unit once you have checked that the installation location matches the following conditions.

A location with sufficient ventilation.

Possibly a location that is sheltered from rain or direct sunlight and is well-ventilated so that hot and cool air does not build up.

A location where the area around the discharge is not exposed to animals or plants which could adversely affect the release of hot or cool air from the unit.

A location where the discharge and operation noise will not be a nuisance to the neighbours.

A location that can support the product’s weight or vibrations and secured for horizontal installation wherever possible.

A location that does not obstruct the air discharge or intake.

A location where there is no danger of flammable or corrosive gas leaks.

A location that provides space for installation and service.

A location that allows the pipe and cable length fixture for internal and external connections.

It may need two or more people to carry out the installation work.

2. Refer to the diagram below for the installation location which is exposed to strong wind.

If a strong wind of more than 5 m/sec blows to the area directly in front of the discharge, the outdoor unit’s air flow is reduced and the outflow may re- enter (short circuit) causing the following outcome:

“Reduced capacity”, “Increased frost formation during heating” or “Operation stopped due to increased pressure”.

Should an exceptionally strong wind blow to the area directly in front of the discharge of the outdoor unit; there is the risk of damage due to the fan’s high-speed reverse rotation.

If the direction of the prevailing wind is known when operating the unit, place the unit at an appropriate angle to the wind’s direction so that the discharge faces towards a building

or a wall.

Air Intake

Wall / Standing outer wall

Strong wind

Air discharge

Strong wind

Intake side

Selecting the location for installation and service.
3. If installing at locations prone to snowfall, install the unit as high as possible with suitable roofing which shelters the unit from snow. 4. Avoid installing the unit in locations where there are petroleum products (such as machine oil), saline content (such as coastal areas), sulphurous gas and where
high frequency noise is generated. 5. Place the indoor and outdoor unit, power cords and indoor/outdoor unit connection cables at a minimum distance of 1 meter or more away from televisions
and radios. This is to avoid interference to picture and/or sound. (However, depending on the electromagnetic waves, noise interference may still occur even with the 1 meter separation.) 6. For restaurants and kitchens, avoid installing at locations which draws oil and steam. Plastic parts can deteriorate from droplets of oil and steam or it can cause falling parts or water leakage. 7. Avoid installing at the location where cutting oil mist or iron powder is present. 8. If there is an immense voltage fluctuation due to the location’s problem, ensure to split the power supply. 9. When installing the product in a place where it will be affected by typhoon or strong wind such as wind blowing between buildings, including the rooftop of a building and a place where there is no building in surroundings, fix the product with an overturn prevention wire, etc. 10. Ensure to assign several people or use a mechanical lift, etc. to transport the unit.

3. SELECTING THE LOCATION FOR INSTALLATION SERVICE

Please secure necessary space to guarantee performance and service & maintenance.

For multiple installations, please secure enough space to enable removal of side face screws between units. (unit:mm)

(A) If there are obstacles at the intake

If the upper part is open 1 For separate installation location
· Only if there are obstacles at the intake

· If there are obstacles on both sides

thMaonre100

thanM5o0re0

thanM2o5re0

thMaonre100

If there are obstacles above the unit 1 For separate installation location
· Only if there are obstacles at the intake
Less than 500

· If there are obstacles on the intake and the other side
Less50th0an

More than 1000

More than 1000

More10th0an

thanM5o0re0

More20th0an thanM2o5re0

2 For multiple units (more than 2 units) · If there are obstacles on both sides
M1o0r0e0than

More than 250

thanM2o5re0

More30th0an

2 For multiple units (more than 2 units) · If there are obstacles on both sides

M1o0r0e0than

Less50th0an

More than 1000

More than 250

More40th0an M2o5re0 than

(B) If there are obstacles at the discharge If the upper part is open

1 For separate installation location

2 For multiple units (more than 2 units)

If there are obstacles above the unit

More than 500
1 For separate installation location Less than 500

More than 150

More than 1000

2 For multiple units (more than 2 units)
Less than 500

More than 1000

More than 1000

(C) If there are obstacles on both the intake and discharge

More than 500

Pattern 1 If there is an obstacle that is higher than the unit on the intake side. (There is no limit to the height of the obstacle above the discharge.)

If the upper part is open

1 For separate installation location

More50th0an

More10th0an

More than 150

More than 1000

2 For multiple units (more than 2 units)

Mor1e0t0h0an

More30th0an

If there are obstacles above the unit 1 For separate installation location
· The dimensions for H, A and L are shown in the following table.

L H H < L

L

A

0 < L 1/2 H

500

1/2H < L H

750

Install a pedestal or mount so that L H

· Cover the bottom part of the pedestal or mount so that air does not go through it.

Less than 500

2 For multiple units (up to 2 units) · The dimensions for H, A and L are shown in the following table.

L H H < L

L

A

0 < L 1/2 H

1000

1/2H < L H

1250

Install a pedestal or mount so that L H

· Cover the bottom part of the pedestal or mount so that air does not bypass it. · A limit of only 2 units can be installed.

Less than 500

More than 1000
More than 1000

More than 200

More than 400

Pattern 2 If there is an obstacle that is higher than the unit on the discharge side. (There is no limit to the height of the obstacle above the discharge.)

If the upper part is open 1 For separate installation location

2 For multiple units (more than 2 units)

thMaonre500

thMaonre100

Mor1e0t0h0an

More30th0an

If there are obstacles above the unit 1 For separate installation location
· The dimensions for H, A and L are shown in the following table.

L H H < L

A 100 Install a pedestal or mount so that L H

· Cover the bottom part of the pedestal or mount so that air does not go through it.

Less than 500

2 For multiple units (up to 2 units) · The dimensions for H, A and L are shown in the following table.

L H H < L

A 400 Install a pedestal or mount so that L H

· Cover the bottom part of the pedestal or mount so that air does not bypass it. · A limit of only 2 units can be installed.

Less than 500

400 More than 1000

1000

More than

More30th0an

thMaonre500

(D) Stacking installation setup · Stack up to 2 tiers. · A dimension of approximately 400 mm is required for the second tier outdoor unit’s drain pipe and space for maintenance of the first tier outdoor unit. · Close A section (the space between the upper and lower level outdoor units) so the outtake air does not bypass it.

1 If there are obstacles at the discharge

2 If there are obstacles at the intake

400

A section

Mor1e0t0h0an

(E) For multiple row installation (on the roof, etc.) 1 For one row installation setup

A section

More than 200

2 For multiple units (more than 2 units)

thMaonre500

Mor1e5t0h0an thMaonre300

thMaonre100

· The dimensions for H, A and L are shown in the following table.

L H H < L

A 300 Installation not possible

· The above mentioned distance is required for optimal unit performance. Allow as much space as possible in order to obtain the best performance from the units.

Mor1e0t0h0an

Mor2e0t0h0an thMaonre400

4. TRANSPORT AND INSTALL THE OUTDOOR UNIT

Transporting

1. Transport the outdoor unit in its original packaging as close as possible to the installation location.

2. In the event that the unit needs to be lifted or suspended, use a rope or belt and use cloth or wood as padding to avoid damaging the unit.

3. Use the side handles to carry the unit and be careful not to touch the fan with your hand or any objects.

Installation

1. Read the “Select the outdoor unit installation location” thoroughly before installing the outdoor unit.

2. When installing to a concrete or solid surface, use M10 or a W 3/8 bolts and nuts to secure the unit. Ensure that it installed upright on a horizontal

plane. (Use an anchor bolt for the installation as shown in the diagram below.)

3. Avoid installing on the slanted roof.

4. In the even where the roof is at risk of receiving oscillations or vibrations, secure the unit with a seismic isolating mount or vibration absorbing

rubber.

5. The drain water will be discharged from the unit during heating or defrosting operation mode.

230 200 160 350

17

195.5

Select an appropriate location with good drainage system. (In the winter, there

is risk of slipping due to freezing, and depending on the installation set up there

is risk of drain water running overhead.)

(Anchor pitch)

412.5

355.5

Please consult us if installing drain elbows.

20.5

In cold regions (where the outdoor temperature can drop to below 0° for 2 to 3 consecutive days), the drain water may freeze and may prevent the fan from operating. For this case, do not use the drain elbow.
5. REFRIGERANT INSTALLATION

159

660

159

(Anchor pitch)

Drain hole ø32

Anchor bolt position

More than 25mm

More than 40mm
Base Anchor bolt length

More than 50mm

For indoor unit refrigerant piping installation, refer to the installation instruction manual that comes with that indoor unit. Do not reuse existing piping, install new piping.
1. Precautions during refrigerant installation. Use clean pipes with no dust inside. The pipe may corrode with the presence of fluorine dust which will adversely affect the refrigerant piping system due to deterioration of the refrigerant oil, etc. This unit is specifically for R32. Ensure to adhere to the following items and install accordingly: · Use pipe cutters and flaring tools which are specially designed for use with R32. · When connecting with flaring tools, coat the flare section with ether-based oil. · Ensure to use flare nuts supplied with the unit when connecting this unit. · Only for storing or for open pipes. · Set the lower limit of the allowable pipe length to 5m. If the pipe is shorter than 5m, the refrigerant may become overfilled and a problem such as abnormal high pressure could occur. · Carefully handle the liquid refrigerant, as it may cause a frostbite. · Do not release refrigerants during the piping works for installing, re-installing and repairing refrigeration parts.

2. The local pipes can protrude from any four directions. Make holes in the pipe panel for the pipes to penetrate it and lay the pipes accordingly. · It is recommended to apply additional substance to the cut area for anti-rust protection. Ensure to install pipe panels to prevent rain water from getting into the unit. Close the gap at the pipe connected area with putty or heat insulator (locally supplied). · If an insect or small animal enters the outdoor unit, there is the risk of shorting in the product electronic casing. [Remove the front panel] (1) Remove the 2 mounting screws. (2) Slide the front panel using your hands downwards to release the pawls. Then remove by pulling the panel towards you.

Specification for pipe connecting indoor unit to outdoor unit.

Maximum pipe length

Height difference

Outdoor located higher installation Outdoor located lower installation

Charge-less pipe length

Additional charge per 1 m

Refrigerant charged at shipment

Total refrigerant amount

U-100
2.60 3.50

U-125/140 50m 30m 15m 5-30m
45 /m
2.98
3.88

Precautions when operating the 3-way valve for piping installation
Do not open the 3-way valve until the piping installation is completed. · It is closed during shipment. · During installation the side panel may warp if only the flare nut is loosened and tightened with a torque wrench.
As a result, always be sure to secure to the hexagonal part of the 3-way valve with a spanner, or other tool. Refer to the following table for the tightening torque of the 3-way valve flare nuts. · If the nuts are over tightened, they may cause the flares to break or leak. Do not add additional force to the valve’s cover. · Using spanners on the cover or valve itself (other than the hexagonal parts) may cause gas leakage.
Avoid using spanners on the cover or parts other than the hexagonal part of the valve.

Front panel

Rear direction

Rear piping panel

Front direction
Mounting screws for the front panel

Downward direction

Sideways direction
Front piping panel

Piping

Putty or heat insulator (locally
supplied)
Prevention measures to avoid small animals from entering

Valve shaft Valve cap

Spanner (Secure)

Flare nut Gas side

Valve shaft Valve cap

Service port
Hexagonal part of the valve
Torque wrench
Service port

Flare nut

Torque wrench

Liquid side
(Please use a single, open-end spanner to loosen and tighten the liquid side 3-way valve flare nut.)

Ensure to do the re-flaring of pipes before connecting to units to avoid leaking.
To prevent the ingress of moisture into the joint which could have the potential to freeze and then cause leakage, the joint must be sealed with suitable silicone and insulation material. The joint should be sealed on both liquid and gas side.
[3-way valve operation method] · Use an Allen wrench (Size 4 mm or 6 mm). Direction to open

Insulation material and silicone sealant. Please ensure there are no gaps where moisture can enter the joint.
Silicone Sealant must be neutral cure and ammonia free. Use of silicon containing ammonia can lead to stress corrosion on the joint and cause leakage.

Opening : Open the cover and turn the Allen wrench counter-clockwise until it stops. Closing : Open the cover and turn the Allen wrench clockwise until it stops.

Precautions for handling the valve cap
Ensure not to scratch the inner surface of the valve or the end of the valve shaft. · Once adjustments to the valve are completed, ensure to tighten the valve cap according to the prescribed torque.

Precautions for handling the service ports
Use a push-rod with a charge hose. · Once adjustments to the valve are completed, ensure to tighten the valve cap according to the prescribed torque.

Precautions for connecting the pipes
For proper connection, align the union and flare straight with each other. Ensure that the pipes do not come into contact with the compressor’s bolts or exterior panel. There is a risk of condensation from the 3-way valve coming out between the insulation material and the indoor unit’s piping when you install the outdoor unit above then the indoor unit. Ensure to caulk the connection parts.

Precautions for insulation installation

Maximum temperature limit of gas or liquid piping exceeds 120 °C

In high humidity environment, reinforce the insulation material for the refrigerant piping. Failure to do so may result in condensation on the surface of the insulation material. Use materials with good heat-resistant properties as the heat insulator for the pipes. Ensure to insulate both the gas side and liquid side pipes. If the pipes are not adequately insulated, condensation and water leakages may occur. Ensure that the current insulation covers the pipes up to the unit’s connecting part. If the piping is exposed, it may cause condensation or burn (when touch the pipe).

ø9.52 (Liquid side)
ø15.88 (Gas side)
Service port

Tightening torque (approx.) 20.6N·m~28.4N·m
(206 f·cm~284 f·cm)
48.0N·m~59.8N·m (480 f·cm~598 f·cm)
10.7N·m~14.7N·m (107 f·cm~147 f·cm)

Piping

Caulking treatment, etc.

Insulation material

90° ± 2°
45° ±1°
R32

Precautions for flare nut installation Dimensions when adding flare nuts and the tightening torque

Piping size ø 6.35 ø 9.52 ø 12.7 ø 15.88

Tightening torque (approx.)
14.0 N·m~18.0 N·m (140 f·cm~180 f·cm)
34.0 N·m~42.0 N·m (340 f·cm~420 f·cm)
49.0 N·m~55.0 N·m (490 f·cm~550 f·cm)
68.0 N·m~82.0 N·m (680 f·cm~820 f·cm)

Flare section dimensions A 8.7 ~ 9.1 mm
12.8 ~ 13.2 mm 16.2 ~ 16.6 mm 19.3 ~ 19.7 mm

After piping connection has completed, ensure there is no gas leakage.

When tightening the flare nut, coat the flares (inner surface only) with refrigerant oil on the flares Firstly, screw in 3-4 turns by hand.
Ensure not to get oil on the screw part. Refrigerant oil used is ether-based.
Once the piping connections are completed, perform leakage inspection using nitrogen gas. When flared joints are reused, the flare part shall be re- fabricated.

Flare configuration Application for ether-based oil

6. LEAK TEST AND EVACUATION
Leak Tightness Test Method
Keep 3-way valve fully closed and pressurize through three-way valve service port. Do not pressurize to the default value at once. Pressurize gradually. 1 Pressurize to 0.5MPa (5 f/cm²G) and then leave it for 5 minutes to ensure that the pressure does not drop. 2 Pressurize to 1.5MPa (15 f/cm²G) and leave it for 5 minutes to ensure that the pressure does not drop. 3 For the test, pressurize to 4.15MPa and leave it for about 1 day to ensure that the pressure does not drop.
EVACUATION
Use a vacuum pump (with back-flow prevention device) to vacuum through the 3-way valve service port to achieve the pressure below -101kPa (5 Torr). Air and moisture remaining in the refrigerant system due to poor vacuum drying can cause performance decrement and malfunction of the compressor.
7. REGARDING REFRIGERANT FILLING

Use nitrogen gas for the leak tightness test. Using flammable gas can cause an explosion.

Pressure meter

Outdoor unit
3-way valve

Nitrogen

Refrigerant meter

Vacuum pump

Indoor unit

Precautions during refrigerant filling

Ensure to fill only with liquid refrigerant when refilling.

If gas refrigerant is filled, the refrigerant composition will not be balanced and will cause

abnormal operation.

Liquid refrigerant

If using cylinders as shown in the bottom left diagram; without a siphon tube inside, turn it upside down and use it. (It is recommended to use the manifold with the side glass.)

Gas refrigerant

Liquid refrigerant

Cylinder with a siphon tube

Siphon tube

Use tools that are designed specifically for R32, for pressure resistance and to prevent mixing impurities.

Not possible Cylinder

Possible Cylinder

Fill the refrigerant from the 3-way valve’s service port on the liquid-side.

For filling and replacing all refrigerant (For refilling due to a leak)

For refilling refrigerant, first collect all residual refrigerant and after vacuum dehydration using the vacuum pump. Refill the refrigerant according to the prescribed amount stated on the placard affixed to this unit.

Precautions after the pipes’ connection have completed

Ensure to open the 3-way valve after completing the piping installation, leak test and vacuuming. If it is closed during operation, it can lead to compressor failure.

Charging with refrigerant

At the time of shipment from the factory, this unit is charged with enough refrigerant for an equivalent pipe length of 30m. If the equivalent pipe length used will be 30m or less, no additional charging will be necessary. If the equivalent pipe length will be between 30 and 50m, charge with additional refrigerant according to the equivalent length given in the table below.
For standard type

U-100/125/140P

Additional charging amount 45 /m

Equivalent length 50m

Minimum length 5m

Pump down operation Please refer to “10. PRECAUTIONS REGARDING TEST RUN (Caution for Pump Down)” of this Installation instruction manual. It is also indicated on the label affixed to the outdoor unit.

8. ELECTRICAL WIRING

This air conditioner must be installed in accordance with national wiring regulations.

Cables connected to outdoor unit must be approved polychloroprene sheathed type 60245 IEC 57 or H05RN-F/H07RN-F or heavier.

Warning

The units must be connected to the supply cables for fixed wiring by qualified technician. Circuit breaker must be incorporated in the fixed wiring in accordance with the national wiring regulations. The circuit breaker must be approved, suitable for the voltage and current ratings of equipment and have a contact separation by 3mm in all poles. When the supply cable is damaged, it must be replaced by qualified technician.
Be sure to install a current leakage breaker, main switch and fuse to the main power supply, otherwise electric shocks may result.

Be sure to connect the unit to secure earth connection. If the earthing work is not carried out properly, electric shocks may result.

Wiring shall be connected securely by using specified cables and fix them securely so that external force of the cables may not transfer to the terminal connection section. Imperfect connection and fixing leads to fire, etc.

Ensure to connect the electrical cable connections and clamp the wires securely to the terminal connections using cord clamps so that no undue force is placed on the wires (power source cable, indoor/outdoor connection cables, earth lead wire). Do not install a phase advance capacitor for power factor improvement. (It does not improve the power factor and will cause abnormal overheating.) Do not bind the excess cables together and place them inside this unit. Protect the electrical cable with the protective bushing provided so that the cables do no get damaged on the knock hole or etched portions. If there is space between the electrical cables and the protective bushing occurs, seal it accordingly. Tie the cables with the provided binding strap so that they do not touch the compressor and the pipes. When setting up the cables, inside of unit install properly so that the front panel will not lift up. Make sure that front panel mount correctly. Use a round type terminal with an insulation sleeve for connecting to the terminal block. Use the appropriate screwdriver for tightening the terminal screws. Small sized screwdriver damages the head of the screw and cannot tighten it properly. There is risk of damaging the screw if the terminal screw is over tightened. Tighten with the appropriate torque.

Earth terminal fixing for functional earthing (for the shielded cable)
Cord clamp

Forced stop connection terminal block

Demand connection terminal block

Subsystem connection terminal block
Indoor/outdoor connection terminal block

Power supply terminal block

Insulate the terminal portion (earth included) with insulation sleeves.

Carry out wiring so that wires are not stretched.

Shielded cable option control (when carrying out demand, forced stop and subsystem connection only).

Cord clamp

Earth terminal Earth lead wire
Power line

Screw diameter name M4 M5

Tightening torque N·m( f·cm) 1.57~1.96 (16~20) 1.96~2.45 (20~25)

Direction to pull out wires

Earth lead wire set up

Back direction

Front direction

Sideways direction

Seal wiring holes after wiring using included protection bush. (other holes are for connecting conduit pipe)

The earth lead wire shall be longer than other lead wires as shown in the figure for electrical safety in case it slips out of the cord from the anchorage.

Be sure to connect the wires correctly to terminal board with connecting the crimp type ring terminal to the wires. If connecting two separate wires to a single crimped terminal, place the two crimped terminal wires together as shown in Fig. A. (If the arrangement shown in Fig. B is used, poor contacts or contact damage may result.)

Cord clamp

Indoor/outdoor connection (shielded cable)

Correct

Incorrect

Please fix all electrical lines firmly with cord clamps.

Thermal insulating piping materials

Please tie the insulation piping securely so that no electrical lines do come into contact with the compressor or exposed piping. Standard accessories: tying bands (4)
Indoor/outdoor, 2-wire mode format, option connection
(demand, forced stop and subsystem connections only).

Fig. A (OK)

Fig. B (not OK)

OUTDOOR UNIT/3-PHASE MODEL

OUTDOOR UNIT/SINGLE-PHASE MODEL

Power supply (220-230-240V~)

Power supply (380-400-415V 3N~)

Power supply (220-230-240V~)

Power supply (220-230-240V~)

Circuit breaker protective Switch
earth

Circuit breaker Switch

Circuit breaker

protective earth

Switch

Circuit breaker Switch

Control cable

protective earth

Control cable

protective earth

Indoor unit

Wired remote controller

Outdoor unit

This equipment complies with EN/IEC 61000-3-12 provided that the short-circuit power Ssc is greater than or equals to 2 kVA at the interface point between the user’s supply and the public system. It is the responsibility of the installer or user of the equipment to ensure; by consultation with the distribution network operator if necessary that the equipment is connected only to supply with a short-circuit power Ssc greater than or equals to 2 kVA.

Ssc : Short circuit power

: functional earthing (for the shielded cable)

Indoor unit

Wired remote controller

Outdoor unit

Model name U-100PZ2E5

Power supply 220-230-240V~

Time delay fuse or circuit capacity
30A

1 Control cable
0.75mm²

2 Ssc
4750kVA

U-125PZ2E5

220-230-240V~

35A

U-140PZ2E5

220-230-240V~

40A

U-100PZ2E8 380-400-415V 3N~

15A

0.75mm² 0.75mm² 0.75mm²

5500kVA 5650kVA
3

U-125PZ2E8 380-400-415V 3N~

15A

0.75mm²

3

U-140PZ2E8 380-400-415V 3N~

15A

0.75mm²

3

1 Use a shielded cable for the control cable. Overall extension less than 500m 3 Intended for professional use. Permission from the power supplier is required when installing the
U-100PZ2E8, U-125PZ2E8, U-140PZ2E8 outdoor units that are connected to a 16 A distribution network.

Search

Valve cap (Valve size) TWIN

The product meets the technical requirements of EN/IEC 61000-3-3. Decide the length and size of the power supply cable based on the maximum ampere tabulated above in accordance with the national wiring regulations. Select the fuse(s) and/or circuit breaker(s) from the types and ratings suitable for the maximum ampere tabulated above in accordance with the national wiring regulations. If capacity of power supply circuit and enforcement are not enough, it can causes the electric shock and a fire.

For the shield part of the shielded cable, twist the end out, crimp it with a round terminal, and connect it to the functional earthing screw. After crimping it with a round terminal, wrap it with insulating tape so there are no spaces and adjust it so the shield part does not touch any live parts.

Crimp the round terminal

Page 2

Be sure that the shield part of the shielded cable does not touch the terminal block or any live parts. Caution Failure to do so may lead to electric shock or fire.

Shield part

Wrap it well with insulating tape so there are no spaces.

9. TWIN TYPE CONNECTIONS
This unit cannot make triple or double twin connections. Two indoor units can be operated simultaneously with a single remote control unit. Note that individual operation is not possible. Master unit and slave unit can be set automatically in twin system. No address setting is necessary. Applicable “TWIN” combination table.

Outdoor unit combination

100 Type U-100
S-50 S-50

125 Type U-125
S-60 S-60

140 Type U-140
S-71 S-71

Piping Connections

The following table shows the pipe diameter. (Branch pipe kit should be used)

Outdoor unit main pipe diameter (mm) Liquid side : ø9.52
Gas side : ø15.88 Branch pipe kit (option)

Branch pipe diameter
Liquid side Gas side TWIN

S-50

Indoor unit combination S-60

ø6.35

ø9.52

ø12.7

ø15.88

CZ-P155BK1

S-71 ø9.52 ø15.88

The following table shows the equivalent pipe lengths and height differences.

Total pipe length Maximum branch pipe length

Maximum branch pipe length difference

Height difference

Outdoor located higher installation Outdoor located lower installation

Height difference between indoor units

SYMBOLS TWIN L+La+Lb La or Lb La > Lb La – Lb H1 H1 H2

SPEC Less than 50m Less than 15m
Less than 10m
Less than 30m Less than 15m Less than 0.5m

· Use the main pipe to gain any rise or fall required for the pipes. · The number of bends should be 8 or less in a single system, and 15 or less overall. · Branch pipes should be positioned horizontally.

Indoor unit

Indoor unit

Outdoor unit

Branch pipe
Main pipe (TWIN type)

Refrigerant charging
For the twin connection, the amount of refrigerant required for pipe length 30m has been included in this unit at the factory. No additional charge is required for the first 30m pipe length in the case of the twin connection. The amount of included refrigerant for each model is listed on NAME PLATE. Make additional charges by adding up pipe length in an order of main pipe (L) branch pipe (La Lb wide diameter) and then selecting the amount of refrigerant corresponding to the remaining (after 30m for twin connection) liquid side pipe diameter and pipe length from the right table.

Liquid pipe diameter
ø6.35
ø9.52

Wiring

Power supply (220-230-240V~)

Power supply (220-230-240V~)

protective earth

protective earth

Power supply (220-230-240V~)
Circuit breaker Switch

Power supply (380-400-415V 3N~)
Circuit breaker Switch

Addition amount of refrigerant [ /m] 20
45

Control cable

Control cable

Indoor unit

Indoor unit

protective earth

Control cable

Outdoor unit

protective earth

Outdoor unit

: functional earthing (for the shielded cable)

10. PRECAUTIONS REGARDING TEST RUN

Check Before Test Run Power supply cable Indoor/outdoor connection wire Earth wire
Refrigerant pipe

Content check
Is the wire set up and connected as described in the instructions? Check for any phase sequence. Are the wire connection’s screws loose? Is the open and close device / leakage breaker installed? Is the power supply cable’s thickness and length appropriately measured as described in the instructions? Is it earthed (grounded)? Check that the insulation resistant value is more than 100M. Use the 500 V mega-testers to measure the insulation. Do not use the mega-tester for any other circuit except for voltage of 220-230-240V~ or 380-400-415V 3N~. Are the wire connections for the indoor/outdoor units connected as described in the instructions? Are there any looped wires? Was the “N-phase” surely connected when connecting the power supply wire on the three-phase model? If N-phase is not connected, only the fan may repeat turning ON/OFF without the compressor operating. In that case, check if there is any problem with N-phase connection.
Is the piping installed as described in the instructions? Are the pipes sizes appropriate? Does the pipe’s length adhere to the specifications? Is the branch pipe slant being appropriately done as described in the instructions? Was vacuum removal sufficiently carried out? Was the leak tightness test carried out with nitrogen gas? Use the testing pressure of 4.15 MPa. Is the piping insulation material appropriately installed? (Insulation material is necessary for both gas and liquid piping.) Is the 3-way valve for the liquid side and gas side open?

Always be sure to use a properly insulated tool to operate the short-circuit pin on the circuit board. (Do not use your finger.) Never switch the power supply ON until the installation has completed. Supply electrical current through all indoor units and check the voltage. Supply electrical current through all the outdoor units and check each inter-phase voltage. Before the test run, ensure to check that the 3-way valve is open. Operating while the valve is closed causes the compressor to fail.

Test Run Procedure
If there are duplicated system addresses, or if the settings for the Nos. of the indoor units are not consistent, an alarm will occur and the system will not start. Switch the power supply ON both indoor and outdoor unit. Short- circuit CHK pin on the outdoor main PCB. Do not remove CHK pin until test run is completed. Removing CHK pin stops test run. Short-circuit RUN pin on the outdoor main PCB for one second or longer. Factory setting is cooling operation mode and cooling operation test run starts. If heating operation starts, short-circuit both right side and centre of the MODE pin (centre and COOL) continuously. Ensure to conduct a test run. In addition, be sure to run the cooling operation test run for at least 20 minutes before starting the heating operation test run. To conduct heating operation test run, short- circuit left side and centre of the MODE pin (centre and HEAT) continuously. Removing CHK pin’s and MODE pin’s short-circuit stops test run. For the test run using remote control unit, please see installation instructions included with the remote control unit.

CHK pin

RUN pin
MODE pin *MODE pin: factory setting is cooling operation mode.
RUN pin

Caution for Pump Down

Pump down means refrigerant gas in the system is returned to the outdoor

MODE pin

unit. Pump down is used when the unit is to be moved, or before servicing the refrigerant circuit.

*MODE pin: factory setting is cooling operation

How to perform Pump-Down (Refrigerant recovery) properly

(SINGLE-PHASE)

mode.

(3-PHASE)

1 Stop operation of the unit (cooling, heating etc.).

OUTDOOR MAIN PCB

2 Connect the pressure gauge to the service port of the gas wiring valve.

3 Short-circuit the PUMPDOWN pin on an outdoor unit control PCB (CR) for more than 1 second to release.

Pump-Down begins and the unit starts operating.

During Pump-Down, LED1 blinks and LED2 is lit on an outdoor unit control

PCB (CR). CHK blinks on the remote controller. 4 Fully close the liquid wiring valve 2-3 minutes later.

Note : In the case that inter-unit wiring is 30m or longer, you cannot pump- down. (lt may trigger the operation of the overload protection device.)

The Pump-Down will begin. 5 When the pressure gauge drops to 0.1-0.2MPa, close the gas wiring

In this case, perform pump-down with pump-down device.

valve tightly and short-circuit the PUMPDOWN pin for more than 1

Outdoor Unit Control PCB (CR)

second to release. That is the end of Pump-Down.

1 phase model

When running for more than 10 minutes, it stops even if the Pump-Down is not completed. Check the blocked state of the liquid side valve.

PUMPDOWN

lt also stops when the PUMPDOWN pin is short-circuited during the

operation.

LED1

CHK

For compressor protection, do not operate to the point where the unit wiring

LED2

A. ADD

side reaches negative pressure.

LED1 LED2

R.C. ADD
SW1 SW2 ON
TEST
STOP MODE
RUN

R.C. ADD ON
SW1 SW2 A. ADD CHK STOP

Outdoor Unit Control PCB (CR) 3 phase model

LED1 LED2

LED1 LED2

TEST
PUMPDOWN RUN
MODE

11. CHECKS AFTER INSTALLATION HAVE COMPLETED
Check the following items after completing installation. Is there a short circuit with the intake air flow? Is the insulation secure? (Refrigerant piping) Are there any errors with the wiring? Are the terminal screws loose? Tightening torque (Unit: N·m { f·cm}) M4…1.57~1.96{16~20}, M5…1.96~2.45{20~25} Is the drain water flowing smoothly? Is the insulation material properly installed? Is the earth wire securely connected? Is the front panel and the indoor unit air conditioner firmly fixed and was the installation completed without any leakage from the refrigerant? Are the indoor and outdoor units secured firmly installed with bolts at secured locations?

12. REGARDING DELIVERY TO THE CUSTOMER
Request the customer to review the operating instructions and explain the operating method for the product. In addition, it is also recommended that regular inspection checks are agreed upon for maintenance.

User inspection places
Serviceman inspection places

· Filter and grill cleaning · Exterior cleaning · Check the operating status · Clean the drain pan or things related to the water discharge · Heat exchanger cleaning

Refer to the installation instruction manual provided with the indoor unit for the specifications on the indoor unit installation.

ENGLISH The English text is the original instructions.
Other languages are translation of original instructions.

ACXF60-30041 1
PRINTED IN MALAYSIA

References

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