Galactic GMZ2-14H-W Technical manual

Thank you very much for purchasing this Air Conditioner. Please
read this use and installation instructions carefully before installing
and using this appliance and keep this manual for future reference.
GMZ2-14H-W
GMZ2-18H-W
GMZ3-24H-W
GMZ4-28H-W
GMZ4-36H-W

Contents
Safety instructions..........................................................................................................................................1
Refrigerant flow diagram................................................................................................................................9
Installation instruction..................................................................................................................................11
Installation diagram ......................................................................................................................................11
Transportation and handling before installation ..........................................................................................12
Installation locations selection......................................................................................................................12
Drainage elbow and drain hose installation .................................................................................................12
Outdoor unit installation ..............................................................................................................................13
Refrigerant piping.........................................................................................................................................13
Wiring ..........................................................................................................................................................17
Trial run .......................................................................................................................................................20
Original instructions
NOTE:
● This heat pump air conditioner has been designed for the following temperatures.
It should be operated within this range:
DC Inverter Unitary Series
Outdoor operation temperature range
Maximum (℃)
Minimum (℃)
Cooling Operation
48
-15
Heating Operation
24
-15
● Storage condition: Temperature -25~60℃
Humidity 30%~80%
●The numbers in the model represent the cooling capacity (Btu/h). For example,
42K represents AMW5-42U4RTA.

1.This air conditioner uses new refrigerant HFC (R32).
2.Since the max. working pressure is 4.3/4.15MPa (R22:3.1MPa), some of the piping and
installation and service tools are special.
3.This air conditioner uses power supply: 220-240V ~, 50Hz.
Please read these SAFETY PRECAUTIONS carefully to ensure correct installation.
·Be sure to use a dedicated power circuit, and do not put other loads on the power supply.
·Be sure to read these SAFETY PRECAUTIONS carefully before installation.
·Be sure to comply with SAFETY PRECAUTIONS of installation manual, because it contains
important safety issues. Definitions for identifying hazard levels are provide below with their
respective safety symbols.
WARNING：Hazards or unsafe practices which COULD result in severe personal injury or death.
CAUTION: Hazards or unsafe practices which COULD result in minor personal injury or product
or property damage.
·Please carefully file indoor and outdoor unit manual away for future reference.
·Installation should be performed by the qualified personnel.
Incomplete installation may cause damage by fire, electric shock, drop or water leakage.
·Perform the installation securely referring to the installation manual.
Incomplete installation could cause a personal injury due to fire, electric shock, the unit falling or
leakage of water.
·Install the air conditioner on a solid base that can support the unit weight.
An inadequate base or incomplete installation may cause injury due to unit falling off from the base.
·Wiring must be done by the qualified electrician. All the electric works must be performed in
accordance with national wiring regulations and local electrical codes.
·Use the specified type of wire for electrical connections safely.
Firmly clamp the interconnecting wires so that their terminals receive no external stresses.
·For wiring, use a cable long enough to cover the entire distance with no connection, and don't
connect multiple devices to the same AC power supply.
Otherwise, it may be due to bad contact, poor insulation, exceed the allowable current and cause a
fire or electric shock.
·After all installations are completed, check to make sure that no refrigerant leaking out occurs.
If the refrigerant gas leakage to the interior, and the heater, stove flame touching it, will generate
harmful substances.
·If the power supply circuit capacity or electrical work is not in place, may cause a fire or electric shock.
·Attach the electrical cover to the indoor unit and the service panel to the outdoor unit securely.
·If the electrical covers on the indoor unit or the service panel of the outdoor unit are not attached
securely, it could result in a fire or an electric shock due to dust water, etc.
·Please be sure to cut off the main power supply before the installation of indoor electronic PCB or
wiring. Otherwise, it will cause electric shock.
·The outdoor machine installation location should pay attention to the protection, avoid people or other
small animals contact with electrical components, please keep the outdoor unit of the surrounding
environment clean and tidy.
·When installing or relocating the unit, make sure that no substance other than the specified
refrigerant (R32) enters the refrigerant circuit.
Any presence of foreign substance such as air can cause abnormal pressure rise or an explosion.
WARNING
Safety precautions
1

Safety precautions
·Perform grounding
Does not connect the earth wire to a gas pipe, water pipe, lightning rod or telephone earth wire.
Defective grounding could cause an electric shock.
·Do not install the unit in a place where an inflammable gas leaks.
If gas leaks and accumulates in the area surrounding the unit, it could cause an explosion.
·Fasten a flare nut with a torque wrench as specified in this manual.
When fastened too tight, a flare nut may break after a long period and cause a leakage of refrigerant.
·Install an earth leakage breaker depending on the installation place (where it is humid).
If an earth leakage breaker is not installed, it could cause an electric shock.
·Perform the drainage/ piping work securely according to the installation manual.
·If there is a defect in the drainage/piping work, water could drops from the unit and household goods
could be wet and damaged.
CAUTION
2
·Do not let air enter the refrigeration system or discharge refrigerant when moving the air conditioner.
·The installation instructions for appliances that are intended to be permanently connected to fixed
wiring, and have a leakage current that may exceed 10mA, shall state that the installation of a
residual current device (RCD) having a rated residual operating current not exceeding 30mA is
advisable.
·This appliance can be used by children aged from 8 years and above and persons with reduced
physical, sensory or mental capabilities or lack of experience and knowledge if they have been given
supervision or instruction concerning use of the appliance in a safe way and understand the hazards
involved. Children shall not play with the appliance. Cleaning and user maintenance shall not be
made by children without supervision.
·If the supply cord is damaged, it must be replaced by the factory or its service department to avoid
danger.
·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.
·Means for disconnection, which can provide full disconnection in all poles, must be incorporated in
the fixed wiring in accordance with the wiring rules.
·It is necessary to allow the disconnection of the appliance from the supply after installation. Make
sure the disconnection of the appliance from the supply when service and maintenance, a
disconnection with a locking system in the isolated position shall be provided.
·The method of connection of the appliance to the electrical supply and interconnection of separate
components, and the wiring diagram with a clear indication of the connections and wiring to external
control devices and supply cord are detailed below.
·Power connection and interconnection between outdoor unit and indoor unit should be conducted with
the power cord of the H07RN-F type or the electrically equivalent type. The size of the power cord is
detailed in outdoor unit manual below.
·Type and rating of circuit breakers / ELB are detailed below.
·The information on dimensions of the space necessary for correct installation of the appliance
including the minimum permissible distances to adjacent structures is detailed below.
·This appliance is intended to be used by expert or trained users in shops, in light industry and on
farms, or for commercial use by lay persons.
·In order to avoid a hazard due to inadvertent resetting of the thermal cut-out, this appliance must not
be supplied through an external switching device, such as a timer, or connected to a circuit that is
regularly switched on and off by the utility.
·Instructions on additional charging of refrigerants are detailed below.
Safety instructions

3
Safety precautions
Precautions for using R32 refrigerant
The basic installation work procedures are the same as the conventional refrigerant (R22 or R410A).
However, pay attention to the following points:
WARNING
1. Transport of equipment containing flammable refrigerants.
Attention is drawn to the fact that additional transportation regulations may exist with respect to equipment
containing flammable gas. The maximum number of pieces of equipment or the configuration of the equipment,
permitted to be transported together will be determined by the applicable transport regulations.
2. Marking of equipment using signs
Signs for similar appliances (containing flammable refrigerants) used in a work area generally are addressed by
local regulations and give the minimum requirements for the provision of safety and/or health signs for a work
location. All required signs are to be maintained and employers should ensure that employees receive suitable
and sufficient instruction and training on the meaning of appropriate safety signs and the actions that need to be
taken in connection with these signs.
The effectiveness of signs should not be diminished by too many signs being placed together. Any pictograms
used should be as simple as possible and contain only essential details.
3. Disposal of equipment using flammable refrigerants
Compliance with national regulations
4. Storage of equipment/appliances
The storage of equipment should be in accordance with the manufacturer's instructions.
5. Storage of packed (unsold) equipment
•Storage package protection should be constructed such that mechanical damage to the equipment inside the
package will not cause a leak of the refrigerant charge.
•The maximum number of pieces of equipment permitted to be stored together will be determined by local
regulations.
6. Information on servicing
6-1 Checks to the area
Prior to beginning work on systems containing flammable refrigerants, safety checks are necessary to ensure that
the risk of ignition is minimized. For repair to the refrigerating system, the following precautions should be
complied with prior to conducting work on the system.
6-2 Work procedure
Work shall be undertaken under a controlled procedure so as to minimise the risk of flammable gas or vapour
being present while the work is being performed.
6-3 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.
6-4 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 flammable atmospheres.
•Ensure that the leak detection equipment being used is suitable for use with flammable refrigerants, i.e. non-
sparking, adequately sealed or intrinsically safe.
6-5 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 CO fire extinguisher adjacent to the charging area.
2
6-6 No ignition sources
•No person carrying out work in relation to a refrigeration system which involves exposing any pipe work that
contains or has contained flammable refrigerant 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 flammable 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.
6-7 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.

4
Safety precautions
6-8 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 following checks shall be applied to installations using flammable refrigerants:
– 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;
– If an indirect refrigerating circuit is being used, the secondary circuit shall be checked for the presence of
refrigerant;
– 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.
6-9 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 capacitors are discharged: this shall be done in a safe manner to avoid possibility of sparking;
•That there no live electrical components and wiring are exposed while charging, recovering or purging the
system;
•That there is continuity of earth bonding.
7. 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.
• If it is absolutely necessary to have an electrical supply to equipment during servicing, then a permanently
operating form of leak detection shall be located at the most critical point to warn of a potentially hazardous
situation.
• 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 such 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 sealants may inhibit the effectiveness of some types of leak detection equipment.
Intrinsically safe components do not have to be isolated prior to working on them.
8. 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.
9. 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.
WARNING

5
WARNING
Safety precautions
10. 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.
11. Leak detection methods
The following leak detection methods are deemed acceptable for systems containing flammable refrigerants:
• Electronic leak detectors shall be used to detect flammable refrigerants, but the sensitivity may not be
adequate, or may need re-calibration. (Detection equipment shall be calibrated in a refrigerant-free area.)
• 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.
• Oxygen free nitrogen (OFN) shall then be purged through the system both before and during the brazing
process.
12. 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 this task.
• 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 there is ventilation available.
13. 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 minimise 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 overfill the refrigeration system.
- Prior to recharging the system it shall be pressure tested with OFN.
• 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.
14. 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.

6
WARNING
Safety precautions
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.
15. 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.
16. 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 is 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 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.

7
WARNING
Safety precautions
17. Competence of service personnel
Information and training
The training should include the substance of the following:
Information about the explosion potential of flammable refrigerants to show that flammables may be dangerous
when handled without care.
Information about potential ignition sources, especially those that are not obvious, such as lighters, light
switches, vacuum cleaners, electric heaters.
Information about the concept of sealed components and sealed enclosures according to IEC 60079-15:2010.
Information about the correct working procedures:
a) Commissioning
• Ensure that the floor area is sufficient for the refrigerant charge or that the ventilation duct is assembled in a
correct manner.
• Connect the pipes and carry out a leak test before charging with refrigerant.
• Check safety equipment before putting into service.
b) Maintenance
• Portable equipment shall be repaired outside on in a workshop specially equipped for servicing units with
flammable refrigerants.
• Ensure sufficient ventilation at the repair place.
• Be aware that malfunction of the equipment may be caused by refrigerant loss and a refrigerant leak is possible.
• Discharge capacitors in a way that won't cause any spark. The standard procedure to short circuit the capacitor
terminals usually creates sparks.
• Reassemble sealed enclosures accurately If seals are worn, replace them.
• Check safety equipment before putting into service.
c) Repair
• Portable equipment shall be repaired outside or in a workshop specially equipped for servicing units with
flammable refrigerants.
• Ensure sufficient ventilation at the repair place.
• Be aware that of the equipment may be caused by refrigerant loss and a refrigerant leak is possible.
• Discharge capacitors in a way that won't cause any spark.
• When brazing is required the following procedures shall be carried out in the right order.
- Remove the refrigerant. If the refrigerant is not required by national regulations, drain the refrigerant to the
outside. Take care that the drained refrigerant will not cause any danger. In doubt, one person should guard the
outlet. Take special care that drained refrigerant will not float back into the building.
- Evacuate the refrigerant circuit.
- Purge the refrigerant circuit with nitrogen for 5 min .
- Evacuate again (not required for A2L refrigerants)
- Remove parts to be replaced by cutting, not by flame.
- Purge the braze point with nitrogen during the brazing procedure.
- Carry out a leak test before charging with refrigerant.
● Reassemble sealed enclosures accurately. If seals are worn, replace them.
● Check safety equipment before putting into service.
d) Decommissioning
• If the safety is affected when the equipment is putted out of service. the refrigerant charge shall be removed
before decommissioning.
• Ensure sufficient ventilation at the equipment location.
• Be aware that malfunction of the equipment may be caused by refrigerant loss and a leak is possible.
• Discharge capacitors in a way that won't cause any spark.
• Remove the If the recovery is not required by national regulations, drain the refrigerant to the outside. Take
care that the drained refrigerant will not cause any danger. In doubt, one person should guard the outlet .Take
special care that drained refrigerant will not float back into the building.
e) Disposal
• Ensure sufficient ventilation at the working place.
• Remove the refrigerant. If the recovery is not required by national regulations, drain the refrigerant to the outside.
Take care that the drained refrigerant will not cause any danger. In doubt, one person should guard the outlet.
Take special care that drained refrigerant will not float back into the building.
• Evacuate the refrigerant circuit
• Purge the refrigerant circuit with nitrogen for 5min.
• Evacuate again.
• Cut out the compressor and drain the oil.

Safety precautions
WARNING
• Appliance shall be installed, operated and stored in a room with a floor area larger than X (X see indoor unit
instruction manual).
• The installation of pipe-work shall be kept to a a room with a floor area larger than X (X see indoor unit
instruction manual).
• The pipe-work shall be complianced with national gas regulations.
• The maximum refrigerant charge amount is X kg (X see below).
• When moving or relocating the air conditioner, consult experienced service technicians for disconnection and
reinstallation of the unit.
• Do not place any other electrical products or household belongings under indoor unit or outdoor unit.
• Condensation dripping from the unit might get them wet, and may cause damage or malfunction of your property.
• 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.
• To keep ventilation openings clear of obstruction.
• 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).
• Any 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 authorises 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.
• The appliance shall be installed and stored so as to prevent mechanical damage from occurring.
• Mechanical connectors used indoors shall comply with ISO 14903. When mechanical connectors are reused
indoors, sealing parts shall be renewed. When flared joints are reused indoors, the flare part shall be
re-fabricated.
• The installation of pipe-work shall be kept to a minimum.
• Mechanical connections shall be accessible for maintenance purposes.
Explanation of symbols displayed on the indoor unit or outdoor unit.
WARNING
This symbol shows that this appliance uses a flammable
refrigerant.
If the refrigerant is leaked and exposed to an external ignition
source, there is a risk of fire.
CAUTION
This symbol shows that the operation manual should be read
carefully.
CAUTION
This symbol shows that a service personnel should be handling this
equipment with reference to the installation manual.
CAUTION
This symbol shows that information is available such as the
operating manual or installation manual.
Safety precautions
8
Series
Up to 2 indoor units
Up to 3 indoor units
Up to 4 indoor units
Up to 5
indoor units
Model
14K
18K
14K
18K
21K
24K
27K
36K
42K
Max. Refrigerant
charge (kg)
1.17
1.29
1.71
1.71
1.81
1.81
2.28
2.68
3.98
Max. Refrigerant Charge Amount X(kg)

Cooling cycle
Heating cycle
OUTDOOR UNITINDOOR UNIT
INDOOR HEAT EXCHANGER- A
INDOOR HEAT EXCHANGER- B
UNIT A
UNIT B
UNIT B
UNIT A
FILTER
OUTDOOR HEAT EXCHANGER
4-WAY VALVE
COMPRESSOR
ACCUMULATOR
Refrigerant flow diagram
9
UNIT A
UNIT B
UNIT C
UNIT A
UNIT B
UNIT C
UNIT D
UNIT D
INDOOR HEAT EXCHANGER- A INDOOR HEAT EXCHANGER- B INDOOR HEAT EXCHANGER- C INDOOR HEAT EXCHANGER- D
FILTER
COMPRESSOR
OUTDOOR HEAT EXCHANGER
4-WAY VALVE
INDOOR UNIT OUTDOOR UNIT
The UNIT D is only for 27/36K models.
Cooling cycle
Heating cycle
Up to 2 indoor units series(14K/18K)
Up to 3 & 4 indoor units series (14K/18K/21K/24K/27K/36K)

Cooling cycle
Heating cycle
INDOOR HEAT EXCHANGER- B INDOOR HEAT EXCHANGER- C INDOOR HEAT EXCHANGER- D
FILTER
COMPRESSOR
OUTDOOR HEAT EXCHANGER
4-WAY VALVE
INDOOR UNIT OUTDOOR UNIT
INDOOR HEAT EXCHANGER- E
VAPOR LIQUID SEPARATOR
Up to 5 indoor units (42K)
INDOOR HEAT EXCHANGER- A
Refrigerant flow diagram
EEV A
EEV B
EEV C
EEV D
EEV E
10

Installation instructions
Installation diagram
Above figure is only a simple presentation of the unit, it may not match the external appearance of the unit you purchased.
Installation must be performed in accordance with the national wiring standards by authorized personnel only.
Outdoor unit
11
Air intake distance from
the wall should be
over 100mm
Air intake distance from the wall
over 350mm
air outlet distance from the wall
should be over 500mm
should be over 100mm
Distance from
the obstacle
should be over
300mm.

Put Cloth or Paper
Transport the product as close to the installation location as
practical before unpacking.
·Handling Method
When hanging the unit, ensure a balance of the unit, check
safety and lift up smoothly.
(1) Do not remove any packing materials.
(2) Hang the unit under packing condition with two ropes,
as shown in Fig below.
·Handling
If have no package to move, Please protect with cloth
or paper.
CAUTION：
Before choosing the installation site, obtain user approval.
·Where it is not exposed to strong wind.
·Where airflow is good and clean.
·Where it is not exposed to rain and direct sunshine.
·Where neighbors are not annoyed by operation sound or hot air.
·Where rigid wall or support is available to prevent the increase of operation sound or vibration.
·Where there is no risk of combustible gas leakage.
·Where it is at least 3m away from the antenna of TV set or radio. An amplifier may be required for the affected
device.
·Install the unit horizontally.
·Please install it in an area not affected by snowfall or blowing snow. In areas with heavy snow, please install a
canopy, a pedestal and/or some baffle boards.
Avoid the following places for installation where air conditioner trouble is liable to occur.
·Where there is much machine oil.
·Salty places such as seaside.
·Where sulfide gas is generated such as a hot spring.
·Where there is high-frequency or wireless equipment.
NOTE:
When operating the air conditioner in low outside temperature, be sure to follow the instruction describe below.
·Never install the outdoor unit in a place where its air inlet/outlet side may be exposed directly to wind.
·To prevent exposure to wind, install the outdoor unit with its air inlet side facing the wall.
·To prevent exposure to wind, it is recommended to install a baffle board on the air outlet side of the outdoor unit.
transportation and handling before installation
Installation locations selection
Drainage elbow and drain hose installation
Installation instructions
12
Install Drainage Elbow and Drain Hose
·The condensate water may drains from the outdoor unit
when the unit operates in heating mode. In order to avoid
disturbing neighbors also to protect the environment, it is
necessary to install a drainage elbow and a drain hose to
drain out the condensate water.
·Please do the drainage work before the indoor unit and
outdoor unit are connected. Otherwise, it will be difficult
to install drainage elbow after the machine becomes
immovable.)
·Connect the drain hose (field-supplied, inside diameter:
15mm) as shown in the figure for drainage.
Drain hose
Drainage elbow
NOTE:
Do not use the drain elbow in the cold region. Drain
may freeze to stop the fan runs.

Air inlet
Air outlet
·Be sure to fix the legs of the units with bolts when installing it.
·Be sure to install the unit firmly to ensure that it does not fall by earthquake or gust.
·The anchor bolts, nuts and washers for the installation are user prepared.
NOTE：
The maximum allowable length of refrigerant piping, and the maximum allowable height difference between the
outdoor and indoor units, are listed below. The shorter the refrigerant piping is, the better the performance will be.
So the connecting pipe should be as short as possible.
1. Piping requirement
Model
Outer Diameter of Pipe (mm)
Gas
Liquid
14K/18K/21K/24K/
27K/36K/42K
φ9.52
φ6.35
Installation instructions
Outdoor unit installation
Refrigerant piping
13
Concrete base or alike
Min.10cm
Setscrew
(at least 4)
About 50cm
About 10cm
(Unit: mm)
Up to 2
indoor
units
Up to 3
indoor
units
Up to 4
indoor
units
Up to 5
indoor
units
14K/18K
14K/18K/
21K/24K
27K/36K
42K
Piping to each indoor unit
(A/B/C/D/E)
m
≤15
≤20
≤20
≤20
Total length of piping between
all units
m
A+B≤30
A+B+C≤
45
A+B+C+D
≤60
A+B+C+D
+E≤80
Max Height Between Indoor
Unit and Outdoor Unit (F)
m
≤15
Max Height Between Indoor
Units (G)
m
≤7.5
Model
Item
Outdoor unit
Indoor unit
Pipe length E
B
C
D
Pipe length A
Height F
Height G
Series
Model (Btu/h)
A
B
C
D
E
F
d
Up to 2 indoor units
14K
730
260
480
290
317
125
11×17
18K
810
280
510
310
338
150
11×17
Up to 3 indoor units
14K/18K/21K/24K
860
310
542
341
368
168
11×17
Up to 4 indoor units
27K/36K
950
340
580
380
414
185
15
Up to 5 indoor units
42K
950
340
580
380
414
185
15

3.Processing of refrigerant piping
(1) Pipe cutting
·Cut the cooper pipe correctly with pipe cutter.
(2) Burrs removal
·Completely remove all burrs from the cut cross section of the pipe.
·Put the end of the copper pipe downward to prevent burrs from
dropping in the pipe.
(3) Putting nut on
·Remove flare nuts attached to indoor and outdoor units, then put
them on pipe having completed burr removal.
(Not possible to put them on after flaring work).
·Flare nut for pipe depending on the diameter of pipe.
(4) Flaring work
·Perform flaring work using flaring tool as shown below.
(5) Check
·Compare the flared work with the figure below.
·If flare is noted to be defective, cut off the flared section and perform flaring work again.
危 险
！
C A U T I O N
(3) Piping thickness shows as below.
Thickness
Diameter When installing pipe through
the wall, secure a cap at the
end of the pipe.
Correct CorrectIncorrect Incorrect
Correct Incorrect
HoleHole
Attach a cap
or vinyl tape.
Protected with the tape or plug.
Attach a cap
or vinyl bag with
rubber band.
Do not place the pipe
directly on the ground.
Rain water can
enter.
Diameter
Tilted Uneven Burred
No good
Good
o
90
Burr Copper pipe
Spare
reamer
Pipe cutter
Flare nut
Copper pipe
Flaring tool
Clutch type Wing nut type
Die
Copper pipe Flare nut Copper pipe
Die
York
Smooth all around
Inside is shining without any scratches
Installation instructions
14
(mm)(mm)
(Unit: mm)
2. Piping material
(1) Prepare the copper pipe on the spot.
(2) Choose dustless, non-humid, clean copper pipe. Before installing the pipe, use nitrogen or dry air to blow away
the dust and impurity on the tube.
Additional refrigerant charge
The unit has been filled with refrigerant, but if L (total pipe length) exceeds 15m(14K/18K/21K/24K) /20m (27K/36K) /25m(42K),
additional charge with refrigerant (R32) is necessary.
For 14K/18K/21K/24K
Additional refrigerant charge =(L-15)×12g/m
For 27K/36K
Additional refrigerant charge =(L-20)×12g/m
For 42K
Additional refrigerant charge =(L-25)×12g/m

Installation instructions
Piping insulation procedure
Insulation
( )field-supplied
(6) After finishing connecting the refrigerant pipes, keep it
warm with the insulation material like figure right after
air-tight test.
· For outdoor unit side, surely insulate every piping including
valves.
· Cover piping joints with pipe cover.
· Using piping tape, apply taping starting from the entry
of outdoor unit. Fix the end of piping tape with adhesive
tape.
- Fix the end of piping tape with adhesive tape.
- When piping has to be arranged through above ceiling,
closet or area where temperature and humidity are high,
wind additional commercially sold insulation for prevention
of condensation.
Clamp(field-supplied)
Insulation (field-supplied)
Refrigerant pipe
(field-supplied)
15
危 险
！CAUTION
Connect pipes using different-diameter joint
If the diameter of connection pipe does not match the port size of outdoor unit, select proper different-
diameter joints in the accessory according to the following table.
Name
Qty
Purpose
1
Change pipe diameter from 1/4 inch
(6.35mm) to 3/8 inch (9.52mm)
1
Change pipe diameter from 3/8 inch
(9.52mm) to 5/8 inch (15.88mm)
1
Change pipe diameter from 3/8 inch
(9.52mm) to 1/2 inch (12.7mm)
Outdoor unit Different-diameter joint indoor unit
4. Piping Connection
(1) Confirm that the valve is closed.
(2) Connect the indoor unit and the outdoor unit with
field-supplied refrigerant piping. Suspend the refrigerant
piping at certain points and prevent the refrigerant piping
from touching the weak part of the building such as wall,
ceiling, etc. (If touched, abnormal sound may occur due
to the vibration of the piping. Pay special attention in case
of short piping length.)
(3) Tightening the flare nut use two spanners like figure right.
(4) Apply the refrigerant oil (field-supply) thinly at the seat
surface of the flare nut and pipe before connecting and
tightening.
(5) Outdoor refrigerant piping should be connected with stop
valves.
Double Spanner Work
Tightening Torque for Flare Nut
Pipe Size
Torque

危 险
！
CAUTION
Vacuum Pumping
Do use Nitrogen.
Air tight procedure
Completion
of Ref.
Piping
Repairing
of Leakage
Part
Check of
Pressure
Decrease
Applying
Nitrogen
Gas
Pass
Procedure
Connect the gauge manifold using charging hoses with a nitrogen
cylinder to check joints of the liquid line and the gas line stop
valves.
Perform the air-tight test.
Don't open the gas line stop valves.
Apply nitrogen gas pressure of 4.15MPa.
Check any gas leakage at the flare nut connections, or brazed
parts by gas leak detector or foaming agent.
Gas pressure doesn’t decrease is OK.
After the air tight test, release nitrogen gas.
6. Vacuum pumping and charge refrigerant
(1) For 14K~36K models, each pipelines needs to be evacuated individually.
For 42K, only need to vacuum at the main stop valve.
(2) An excess or a shortage of refrigerant is the main cause of trouble to the unit. Charge the correct refrigerant
quantity according to the description of label at the inside of the manual.
(3) Check refrigerant leakage in detail. If a large refrigerant leakage occurs, it will cause difficulty with breathing or
harmful gases will occur if a fire is being used in the room.
Vacuum pump
-0.101MPa
(-760 mmHg)
manifold gauge
Charge hose
(for R32)
(1) Remove the service port cap of the stop valve on the gas pipe
side of the outdoor unit.
(2) Connect the manifold gauge and vacuum pump to the service port
of the stop valve on the gas pipe side of the outdoor unit.
(3) Run the vacuum pump. (Work for more than 15 minutes)
(4) Check the vacuum with the gauge manifold valve, then close the
gauge manifold valve and stop the vacuum pump.
(5) Leave it as is for one or two minutes. Make sure the pointer of the
manifold gauge remains in the same position. Confirm that the
pressure gauge shows -0.101MPa (or -760mHg).
(6) Remove the manifold gauge quickly from the service port of the
stop valve.
(7) After refrigerant pipes are connected and evacuated, fully open
all stop valves on both sides of gas pipe and liquid pipe.
(8) Open adjusted valve to add refrigerant (must be refrigerant is liquid).
(9) Tighten the cap to the service port.
(10) Retighten the cap.
(11) Leak test foam with halogen leak detector to check the flare nut
and brazing Carolina Department leaks. Use foam that not
generates ammonia (NH3) in the reaction.
16
5. Air Tight Test
Installation instructions
Additional refrigerant charge
The unit has been filled with refrigerant.
Please according “Piping Requirement” to calculate additional charge.
After vacuum pump procedure has been finished, first exhaust air from charge hose, then open valves, charge
refrigerant as “liquid” type through Liquid stop valve.
At the end, please close valves and record the refrigerant charging quantity.

！
危 险
！
● With tape material along the wire wrapped, sealed wiring holes, prevent the condensed water and insects.
● Tightly secure the power source wiring using the cord clamp inside the unit.
NOTE: Fix the rubber bushes with adhesive when conduit tubes to the outdoor unit are not used.
General Check
(1) Make sure that the field-selected electrical components (main power switches, circuit breakers, wires, conduit connectors and
wire terminals) have been properly selected according to the electrical data.
Make sure that the components comply with National Electrical Code (NEC).
(2) Check to ensure that the voltage of power supply is within +10% of nominal voltage and earth phase is contained in the power
supply wires. If not, electrical parts will be damaged.
(3) Check to ensure that the capacity of power supply is enough.
If not, the compressor will not be able to operate cause of voltage drop abnormally at starting.
(4) Check to ensure that the earth wire is connected.
(5) Install a main switch, multi-pole main switch with a space of 3.5mm or more, single phase main switch with a space of 3.0mm
or more between each phase. Please use the special three-phase power switch for 3-Phase product.
(6) Check to ensure that the electrical resistance is more than 2MΩ, by measuring the resistance between ground and the
terminal of the electrical parts. If not, do not operate the system until the electrical leakage is found and repaired.
● Turn OFF the main power switch to the indoor unit and the outdoor unit and wait for more than 3 minutes before
electrical wiring work or a periodical check is performed.
● Check to ensure that the indoor fan and the outdoor fan have stopped before electrical wiring work or a periodical check
is performed.
● Protect the wires, electrical parts, etc. from rats or other small animals. If not protected, rats may gnaw at unprotected
parts and at the worst, a fire will occur.
● Avoid the wiring from touching the refrigerant pipes, plate edges and electrical parts inside the unit.
If not do, the wires will be damaged and at the worst, a fire will occur.
● Install an ELB (Electric Leakage Break) in the power source.
If ELB is not used, it will cause electric shock or fire at the worst.
● This unit uses an inverter, which means that it must be used an earth leak detector capable handing harmonics in order
to prevent malfunctioning of the earth leak detector itself.
● Do not use intermediate connection wires, stranded wires(see <Attentions when Connect the power supply wiring>),
extension cables or control line connection, because the use of these wires may cause fever, electric shock or fire.
● The tightening torque of each screw shall be as follows.
M4: 1.0 to 1.3 N·m
M5: 2.0 to 2.5 N·m
M6: 4.0 to 5.0 N·m
M8: 9.0 to 11.0 N·m
M10: 18.0 to 23.0 N·m
Keep the above tightening torque when wiring work.
WARNING
CAUTION
Installation instructions
Wiring
17

Electrical wiring diagram
Installation instructions
18
Outdoor unit
Indoor unit A
Indoor unit B
Terminal
Terminal A
Terminal B
Terminal
Terminal
Power supply
4(SI)
4(SI)
4(SI)
4(SI)
1(L)
1(L)
1(L)
1(L)
2(N)
2(N)
2(N)
2(N)
Power connecting cord
Power connecting cord
Power connecting cord
Power connecting cord
Power connecting cord
N
L
NOTE:
For some indoor units
Indoor unit C
Terminal C
Terminal
4(SI) 4(SI)
1(L) 1(L)
2(N) 2(N)
Indoor unit D
Indoor unit E
Terminal D
Terminal E
Terminal
Terminal
4(SI)
4(SI)
4(SI)
4(SI)
1(L)
1(L)
1(L)
1(L)
2(N)
2(N)
2(N)
2(N)
NOTES:
1. For series up to 2 indoor units, there is no INDOOR UNIT C, D and E.
2. For series up to 3 indoor units, there is no INDOOR UNIT D and E.
3. For series up to 4 indoor units, there is no INDOOR UNIT E.
Power connecting cord
Wires connect steps:
Take 42K model for example
(1) Unscrew the screws on maintenance plate, and remove it as shown by the arrow mark.
(2) Fasten the power supply cable and the connection cable through conductor hole.
(3) Connect the power supply cable and the connection cable to terminal.
(4) Fasten the power supply cable and the connection cable with the cable clamp.
(5) Put the maintenance plate back after completion of the work.
Maintenance
plate
Power supply
Connection cable E
Connection cable D
Connection cable C
Connection cable B
Connection cable A
Power supply
Connection cable E
Connection cable D
Connection cable C
Connection cable B
Connection cable A
Outdoor unit Indoor unit
4(SI)
4(SI)
1(L) 1(L)
0(L)
2(N) 2(N)
3( )