IRP U-SHAPE Series User manual

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U-SHAPE WINDOW
AIR CONDITIONER
USER MANUAL
950-0282 3/31/2022
FOR MODELS:
COOLING Btu/h
WAU38YREX
8,000
WAU310ZREX
10,000
WAU312YREX
12,000

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CONTENTS
IMPORTANT SAFETY INSTRUCTIONS........................................................................................................................... 3
Cautions.................................................................................................................................................................... 3
Exception Clauses .................................................................................................................................................... 3
The Refrigerant......................................................................................................................................................... 4
Safety Precautions.................................................................................................................................................... 5
Working Temperature Range.................................................................................................................................... 7
Qualification of workers............................................................................................................................................. 7
Electrical Precautions ............................................................................................................................................... 7
Safety Operation of Flammable Refrigerant ............................................................................................................. 8
Information on servicing............................................................................................................................................ 9
INSTALLATION REQUIREMENTS ................................................................................................................................. 14
Tools and Parts ....................................................................................................................................................... 14
Location Requirements........................................................................................................................................... 15
Electrical Requirements.......................................................................................................................................... 16
INSTALLATION INSTRUCTIONS ................................................................................................................................... 17
Remove packaging materials.................................................................................................................................. 17
Prepare the Bracket................................................................................................................................................ 17
Install Support Bracket............................................................................................................................................ 17
Install Air Conditioner.............................................................................................................................................. 19
Foam Installation..................................................................................................................................................... 20
Wall Mounted Installation........................................................................................................................................ 22
AIR CONDITIONER CONTROLS ................................................................................................................................... 24
Unit Control Panel................................................................................................................................................... 24
Operation Buttons................................................................................................................................................... 24
DISPLAYS............................................................................................................................................................... 25
REMOTE CONTROL....................................................................................................................................................... 26
Function Buttons..................................................................................................................................................... 27
Remote Display....................................................................................................................................................... 28
Automatic Operation ............................................................................................................................................... 29
Cooling Operation................................................................................................................................................... 29
Dry Operation (Dehumidifying) ............................................................................................................................... 30
FAN Operation ........................................................................................................................................................ 30
Timer Operation...................................................................................................................................................... 31
Advanced Operations ............................................................................................................................................. 32
IMPORTANT INFORMATION.......................................................................................................................................... 34
3-minute delay ........................................................................................................................................................ 34
Auto Restart............................................................................................................................................................ 34
Air Directional Louvers............................................................................................................................................ 34
Normal Sounds ....................................................................................................................................................... 34
AIR CONDITIONER CARE ............................................................................................................................................. 35
Cleaning the Air Filter.............................................................................................................................................. 35
Cleaning the Front Panel........................................................................................................................................ 35
Repairing Paint Damage of Outside Case.............................................................................................................. 35
Annual Maintenance............................................................................................................................................... 35
SPECIFICATIONS........................................................................................................................................................... 36
TROUBLESHOOTING .................................................................................................................................................... 37
WARRANTY .................................................................................................................................................................... 38
FOREWORD
•Inspect unit for shipping damage, mishandling and accessories before installing.
•The appearance of the units that you purchase may be slightly different from the ones described in this manual,
but will not affect proper operations and usage.
•Please read carefully the sections corresponding to the specific model you have and keep the manual in a safe
place for reference.
•The refrigerant used in your window air conditioner is an environmentally safe and friendly.

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ATTENTION
•Do not modify, manipulate or reconfigure the plug.
•The appliance shall be installed and operated in accordance with National Electrical Code regulations.
•Do not operate your unit in the cooling mode when the outside temperature is below 64°F . Do not operate your unit
in the heating mode when outside temperature is above 109°F.
•If the supply cord is damaged, it must be replaced by a qualified technician in order to avoid a fire hazard.
•All electrical repairs and connections must be performed by a licensed electrician.
IMPORTANT SAFETY INSTRUCTIONS
Cautions
•Contact the authorized service technician for repair or maintenance of this unit.
•Contact a qualified technician or individual for installation of this unit.
•The air conditioner is not intended for use by children or infirm persons without supervision.
•Young children should be supervised to ensure that they do not play with the air conditioner.
•If the supply cord is damaged, it must be replaced by the manufacturer, its service agent or similarly qualified
persons in order to avoid a hazard.
•Installation work must be performed in accordance with the national wiring standards by authorized personnel only.
•This appliance is not intended for use by persons with reduced physical, sensory or mental capabilities or lack of
experience and knowledge, unless they have been given supervision or instruction concerning use of the
appliance by a person responsible for their safety. Children should be supervised to ensure they are away from
the appliance.
•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 should not play with the appliance.
•Cleaning and user maintenance should not be completed without supervision.
•Instructions for cord-connected room air conditioners should include manufacturers recommendations regarding
the use of cord sets (extension cords). If use of an extension cord is not recommended, the instruction will state
this. Recommendations for an extension cord should specify at least the use of a cord set with and equipment
grounding conductor, grounding-type attachment plug, and grounding-type connector (load fitting) and the
ampacity and voltage rating of the cord set.
Exception Clauses
•Before using the window air conditioner, please read this manual carefully. IRP reserves the right to make any
technical changes without prior notice.
•IRP will bear no responsibilities when personal injury or property loss is caused by the following reasons.
•Damage the product due to improper use or misuse of the product.
•Alter, change, maintain or use the product with other equipment without abiding by the instruction manual of
manufacturer.
•Defects caused by corrosive gas on location.
•Defects due to improper operation during transportation of product.
•Operate, repair, maintain the unit without abiding by instruction manual or related regulations.
•The problem or complaint is caused by the quality specifications or performance of parts and components that
produced by other manufacturers.
•The damage is caused by natural calamities, bad using environment or force majeure.
•If moving, maintaining, installation of the air conditioner is needed, please contact dealer or local service center to
conduct it at first. Air conditioner must be installed, moved or maintained by appointed unit. Otherwise, it may
cause serious damage or personal injury or death.

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•When refrigerant leaks or required discharge during installation, maintenance, or disassembly, it should be
handled by certified professionals or otherwise in compliance with local laws and regulations.
Please read this manual carefully before operating the unit.
The Refrigerant
An air conditioner operates by circulating a refrigerant inside a closed system to remove heat and humidity from the
indoor air. Before a refrigerant is inserted into the unit at the factory it is cleaned to ensure efficient operation. Inside
this unit is R32, a flammable, odorless, fluoride-based refrigerant. Furthermore, it can lead to explosion under certain
conditions. The flammability of R32 is very low and can only be ignited by flame.
Compared with common refrigerants, R32 is a nonpolluting refrigerant with no harm to the ozonosphere. The influence
Upon the greenhouse effect is also lower. R32 has got very good thermodynamic features which lead to a really high
energy efficiency. The units therefore need less refrigerant contained within.
WARNING:
•Keep ventilation openings, in the appliance enclosure or in the built-in structure, clear of obstruction.
•Do not use means to accelerate the defrosting process or to clean, other than those recommended by the
manufacture. Should a repair be needed, contact a local licensed service technician.
•Any repairs carried out by unqualified personnel may be dangerous.
•Piping and keep open flames and hot items away from unit
•Appliance should be installed, operated and stored in a room on a stable area.
•Appliance filled with flammable gas R32. For repairs, strictly follow manufacturer’s instructions only.
•Be aware that refrigerants may not contain an odour.
•The appliance should be stored in a room without continuously operating ignition sources. For example: open
flames, an operating gas appliance or an operating electric heater.
•Do no pierce or burn. Be aware that refrigerants may not contain an odor.
•Adopt R32 flammable refrigerant. When maintaining or deposing the unit, the refrigerant inside the system must
be recovered. Refrigerant should be recovered, which can’t be discharged freely.
•Keep ventilation opening clear of obstruction.
•The unit can only be maintained according to the method suggested by manufacturer.
•Appliance should be stored in a room without continuously operating open flames (eg: an operating gas appliance)
and ignition sources (eg: an operating electric heater) close to the appliance. No open fire (fired equipment such
as electrical heater and gas stove etc.) or any equipment (eg: switch) that might generate arc around the
appliance.
•The appliance should be stored so as to prevent mechanical damage from occurring.

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NOTE:
•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 authorized their competence to handle
refrigerants safely in accordance with an industry recognized assessment specification.
•Servicing should only be performed as recommended by the equipment manufacturer. Maintenance and repair
requiring the assistance of other skilled personnel should be carried out under the supervision of the person
competent in the use of flammable refrigerants.
Safety Precautions

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Working Temperature Range
The air conditioner must be operated within the temperature range indicated below. In order to ensure the optimal
performance of our products, the design specifications of the unit and remote control are subject to change without
prior notice.
The operating temperature range (ambient temperature) for cooling mode is 64 ˚F (18 ˚C)-104 ˚F (40˚C).
Qualification of workers
Qualification of the working personnel for maintenance, service and repair operations should according to CAS/UL
60335-40:7 Annex HH. Every working procedure that affects safety means shall only be carried out by competent
persons according to Annex HH. Special training additional to usual refrigerating equipment repair procedures is
required when equipment with FLAMMABLE REFRIGERANTS is affected.
All the work men who are engaging in the refrigeration system should bear the valid certification awarded by the
authoritative organization and the qualification for dealing with the refrigeration system recognized by the industry. If it
needs other technician to maintain and repair the appliance, they should be supervised by the person who bears the
qualification for using the flammable refrigerant.
It can only be repaired by the method suggested by the manufacturer.
Electrical Precautions
Before connecting the air conditioner to the power supply, please check that the power supply is at rated voltage 115V
or 230±5% as specified on nameplate. The power supply cord with this unit contains a current detection device
designed to reduce the risk of fire. Please refer to the section of “Electrical Requirements” on page 15 for details.
If the event that the power supply cord is damaged, it cannot be repaired. It must be replaced with a cord from the
product vendor.
WARNING:
•Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance.
•Avoid fire hazard or electric shock. Do not use an extension cord or an adaptor plug. Do not remove any prong
from the power cord.
•Be sure the air conditioner is properly grounded. To minimize shock and fire hazards, proper grounding is
important. The power cord is equipped with a 3-prong grounding plug for protection against shock hazards.
•The air conditioner must be used in a properly grounded wall receptacle. If the wall receptacle you intend to use
is not adequately grounded or protected by a time delay fuse or circuit breaker, have a qualified electrician
install the proper receptacle.
•In correct installation for circuit breaker may cause fire and electric shock.
•Do not spill water on the remote controller. This could result in electric shock or malfunction.
•Do not extend fingers or objects into air inlet or air outlet.
•Do not step on air conditioner or put heavy objects.
•Do not block air outlet or air inlet.
•Do not pull the power cord strongly.
•Do not run the air conditioner without side protective cover in place. This could result in mechanical damage.
•Do not use an extension cord or an adapter plug.
•Do not repair air conditioner by yourself. This may result in electric shock or damage.
•Disconnect power supply when cleaning air conditioner.
•Ensure the receptacle is accessible within the installed unit.
•The air conditioner should be installed in accordance with national wiring regulation.
Operating Temperature Range
Indoor DB/WB
Outdoor DB/WB
Maximum Cooling
104˚F(40˚C) / 80˚F(26.7˚C)
104˚F(40˚C) / 80˚F(26.7˚C)

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Safety Operation of Flammable Refrigerant
Qualification requirement for installation and maintenance
Contact the authorized service technician for repair or maintenance of this unit.
For any service technical support, call the customer center.
Installation Notes
The air conditioner is not allowed to use in a room that has running fire such as fire source, working coal gas ware,
operating heater.
Leak test must be performed after installation.
Maintenance Notes
1. Check whether the maintenance area or the room area meet the requirement of the nameplate.
It is only allowed to be operated in the rooms that meet the requirement of the nameplate.
2. Check whether the maintenance area is well ventilated.
The continuous ventilation status should be kept during the operation process.
3. Check whether there is fire source or potential fire source in the maintenance area.
The naked flame is prohibited in the maintenance area and the “No Smoking” warning should be hanged.
4. Check whether the appliance mark is in good condition.
Replace the vague or damaged warning label.
Welding
1. If you have to cut or welding the refrigerant system pipes in the process of maintaining, please follow the below
steps:
•Shut down the unit and cut power supply.
•Safely remove the refrigerant.
•Vacuuming.
•Clean it with N2 gas.
•Cutting or welding
•Carry back to the service spot for welding
2. The refrigerant should be recycled into the specialized storage tank.
3. Make sure that there isn’t any open flame near the outlet of the vacuum pump and it is well ventilated.
Filling the refrigerant
1. Use the refrigerant filling equipment specialized for R32. Make sure that different kinds of refrigerant won’t
contaminate with each other.
2. The refrigerant tank should be kept upright at the time of filling refrigerant.
3. Stick the label on the system after filling is finished.
4. Don’t overcharge. Charge only with amount specified on nameplate.
5. After filling is finished, please test for leakage before starting unit. This should be done prior to when the
refrigerant is removed.
6. The filling work must be performed by certificated technician.
Safety instruction for transportation and storge
1. Pease use the flammable gas detector to check before unload and open the container.
2. No fire source and smoking.
3. Follow the local rules and laws.
Storage after moving the unit
1. Do not puncture or light the unit.
2. The unit shall be stored in a room without continuous fire source such as naked fire, litten gas appliance,
operating electric heater.
3. The unit shall be stored in a ventilated place. The ventilation device shall operate normally and ventilation port
should be clear of any blockages.
4. Check the unit periodically to see if there is collision mark and if the appearance is good.
5. Check the electronic components (eg: cable) periodically to see there is breakage.
6. Do not impact or collapse the unit to avoid leakage of refrigerant. If leakage is found, please arrange
ventilation immediately and ask the professionals for maintenance in order to avoid a fire hazard.

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Disposal and Recycle
Disposal:
The technician shall be familiar with the device and all its characteristics before disposal. Proceeding safe recycle
of refrigerant is recommended. If the recycled refrigerant shall be utilized, please analyze the sample of refrigerant and
oil before proceeding. Please ensure the required power supply is used before testing. Please take the following
operation
1. Be familiar with the device and its operation.
2. Cut off power supply.
3. It is recommended to use a mechanical recovery device to recover refrigerant prior to the recycling/disposal of the
unit. When recovering refrigerant, all necessary personal protective equipment must be worn to ensure no bodily
harm during this process. All devices should be rated for use on the proper refrigerant, in order to comply with
relevant standards.
4. Please pump the evacuated system into a vacuum. If a full system vacuum cannot be achieved, please attempt to
vacuum from multiple locations internal to the refrigerant piping.
5. Make sure the capacity of refrigerant tank is sufficient before stating the refrigerant recycle process.
6. Start and operate the recycle device according to the operation instruction of manufacturer.
7. The refrigerant tank shall not be too full. The filled liquid shall not exceed 80% of the capacity of refrigerant tank.
8. Do not exceed the maximum operation pressure although the duration is short.
9. Remove the refrigerant tank and device quickly after finishing operation and make sure all cut-off valves in the
device are closed.
10. The recycled refrigerant cannot be filled into another refrigeration system before purification and inspection.
Label
The unit shall be labeled with data and note after scrapping and discharging refrigerant. Make sure the label on the
unit can reflect the R32 refrigerant which it has been filled.
Recycle
It’s recommended to remove the refrigerant in the system before maintenance and disposal.
Put the refrigerant into the specialized refrigerant tank with refrigerant label. The refrigerant tank shall be equipped with
pressure relief valve and cut off valve which are in good condition. If possible, the tank should be pulled into a vacuum
before using and keep it at normal temperatures.
Recycling device shall be kept in good working status and equipped with operation instructions for reference. The
device shall be applicable for the recycle of R32 Refrigerant. In addition, qualified weighing apparatus which can be
used normally shall be prepared. The hose shall adopt removable connector without leakage for connection and keep
it in good status. Check if the recycling device is in normal status before using it and if it is properly stored with all
electrical components sealed to prevent fire hazard caused by refrigerant leakage. Call service center if you have any
questions.
The recycled refrigerant shall be put in proper container attached with transportation instruction and sent it back to the
refrigerant manufacturer. Do not mix different refrigerants in the refrigerant recycle device, especially the refrigerant
tank. When disassembling the compressor or clearing the compressor oil, make sure the compressor has pumped into
a proper vacuum, so that there is no R32 refrigerant remained in the lubricant. Vacuum pumping shall be done before
the compressor is sent back to the supplier. Only electric heating can be used to heat the shell of compressor in order
to speed up the course. When oil is drained from the system, please ensure the safety.
Information on servicing
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.
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.

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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 eg.: non-sparking, adequately sealed or intrinsically safe.
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 power or CO2fire extinguisher adjacent to the charging area.
No ignition sources
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.
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.
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.
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,
and 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 no live electrical components and wiring are exposed while charging, recovering or purging the system.
•That there is continuity of earth bonding.
Repairs to sealed components
During repairs to sealed components, all electrical connections 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 valves, etc.
Ensure that the 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.
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