Mars Comfort-Aire RXTS Series User manual

IOM - RXTS Series
1
www.comfort-aire.com
Installation and Operation Manual
RXTS Series
U-Rack Window Type
Room Air Conditioner
RXTS-81A
RXTS-101A
RXTS-121A

IOM - RXTS Series
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!
Table of Contents
Important Safety Instructions ...................................................03
Installation Instructions..............................................................14
Normal Sounds / Sound Performance.......................................28
Air Conditioner Features............................................................29
Care and Cleaning.......................................................................33
Troubleshooting Tips..................................................................34

IOM - RXTS Series
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 Page 3 
Important Safety
Instructions
Important Safety Instructions
Inside you will find many helpful hints on how to use and maintain your air conditioner
properly. Just a little preventive care on your part can save you a great deal of time and
money over the life of your air conditioner. You'll find many answers to common
problems in the chart of troubleshooting tips. If you review our chart of Troubleshooting
Tips first, you may not need to call for service at all.
To prevent injury to the user or other people and property damage, the following
instructions must be followed. Incorrect operation due to ignoring of instructions may
cause harm or damage. The seriousness is classified by the following indications.
.
READ THIS MANUAL
This symbol indicates the possibility of death or serious injury
This symbol indicates the probability of death or serious injury.
.
Always do this.
Never do this.
CAUTION
NOTICE
This symbol indicates the possibility of injury or damage to property.
Indicates information considered important, but not hazard-related.
WARNING
DANGER
Plug in power plug
properly.
Do not modify power
cord length .
Always ensure effective
grounding.
Otherwise, it may cause
electric shock or fire due
to excess heat
generation.
It may cause electric
shock or fire due to
heat generation.
Incorrect grounding
may cause electric
shock.
It may cause electric
shock or fire due to
heat generation.
It may cause electric shock . It may cause failure of machine
of electric shock.
It may cause electric shock or fire.
If the power cord is damaged, it must
be replaced by the manufacturer or
an authorised service centre or a
similarly qualified person in order to
avoid a hazard.
Do not operate or stop the
unit by inserting or pulling
out the power plug.
Do not operate with wet
hands or in damp
environment.
Do not allow water to run into
electric parts.
Do not damage or use an
unspecified power cord.
!
!
!! !Unplug the unit if strange sounds,
smell, or smoke comes from it.
It may cause fire and
electric shock.
It may cause fire and electric
shock.
Do not use the socket if
it is loose or damaged.
DANGER

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 Page 4 
Important Safety
Instructions
DANGER
.
Do not disassemble
or modify unit.
It may cause failure
and electric shock.
It may cause electric shock.
Do not open the unit during
operation.
This could damage your
health.
Incorrect installation
may cause fire and
electric shock.
Do not direct airflow at
room occupants only.
Always install circuit
breaker and a
dedicated power circuit.
Ventilate room before operating air conditioner if there
is a gas leakage from another appliance.
It may cause explosion, fire and, burns.
It may cause fire and electric
shock.
It may cause an explosion or fire.
It may cause fire.
Do not use the power cord
close to heating appliances.
Do not use the power cord near
flammable gas or combustibles,
such as gasoline, benzene,
thinner, etc.
Keep firearms away.
!
!
!!
WARNING
When the air filter is to
be removed, do not
touch the metal parts
of the unit.
It may cause an injury. This could injure the pet or
plant.
Water may enter the unit and
degrade the insulation. It
may cause an electric shock.
An oxygen shortage may occur.
Do not use this air conditioner to
preserve precision devices, food,
pets, plants, and art objects. lt may
cause deterioration of quality, etc.
Appearance may be
deteriorated due to
change of product color
or scratching of its surface.
Do not put a pet or house
plant where it will be
exposed to direct air flow.
Do not clean the air
conditioner with water.
Ventilate the room well when
used together with a stove, etc.
Do not use for special purposes.Do not use strong
detergent such as wax
or thinner but use a
soft cloth.
CAUTION
!!

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 Page 5 
Do not clean unit when power
is on as it may cause fire and
electric shock, it may cause an
injury.
If bracket is damaged, there is
concern of damage due to falling
of unit.
Operation with windows
opened may cause
wetting of indoor and
soaking of household
furniture.
When the unit is to be
cleaned, switch off, and turn
off the circuit breaker.
Ensure that the installation
bracket of the outdoor appliance
is not damaged due to prolonged
exposure.
Stop operation and
close the window in
storm or hurricane.
!
Always insert the filters
securely. Clean filter
once every two weeks.
Operation without filters
may cause failure.
It may cause electric shock
and damage.
There is danger of fire or
electric shock.
It may cause failure of product or
fire.
It contains contaminants and could
make you sick.
It may cause failure of
appliance or accident.
Hold the plug by the head
of the power plug when
taking it out.
Do not place heavy object
on the power cord and
ensure that the cord is not
compressed.
Turn off the main power switch
when not using the unit for a
long time.
Do not drink water drained
from air conditioner.
Do not place obstacles
around air-inlets or
inside of air-outlet.
!!!
Use caution when unpacking and installing.
Sharp edges could cause injury.
!!
CAUTION
If water enters the unit, turn the unit off at
the powei outlet and switch off the circuit
breaker. Isolate supply by taking the
power-plug out and contact a qualified
service technician.
CAUTION
This appliance is not intended for use by people (including children) 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 that they do not play with the appliance.
If the power cord is damaged, it must be replaced by the manufacturer, its service agent, or
similarly qualified person in order to avoid a hazard.
The appliance shall be installed in accordance with national wiring regulations.
Do not operate your air conditioner in a wet room such as a bathroom or laundry room.
The appliance with electric heater shall have at least 1 meter of space to the nearest
combustible material.
Contact the authorized service technician for repair or maintenance of this unit.
!!
Important Safety
Instructions

IOM - RXTS Series
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Important Safety
Instructions
WARNING
Do not, under any
circumstances, cut,
remove, or bypass
the grounding prongs.
NOTICE:
The power supply cord with this air conditioner contains a current detection device
designed to reduce the risk of fire. Please refer to the section Operation of Current Device
for details. In the event that the power cord is damaged, it cannot be repaired – it must be
replaced with a cord from the product manufacturer.
Avoid fire hazard or electric shock. Do not
use an extension cord or an adapter plug.
Do not remove any prongs from the power
cord.
Grounding type wall receptacle
Power supply cord with
3-prong grounding plug
and current detection
device.
DANGER
Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other
appliance.
For Your Safety
DANGER
WARNING
The complete electrical rating of your new room air conditioner is stated on the serial plate. Refer to
the rating when checking the electrical requirements.
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 three-prong grounding plug for
protection against shock hazards.
Your 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. Ensure the receptacle is accessible after the unit
installation.
Do not run air conditioner without side protective cover in place.This could result in mechanical
damage within the air conditioner.
Do not use an extension cord or an adapter plug.
Electrical Information
Important Safety
Instructions
 Page 6 
To reduce the risk of fire, electrical shock, or injury when using your air conditioner, follow basic
precautions, including the following:
Be sure the electrical service is adequate for the model you have chosen. This information can be
found on the serial plate, which is located on the side of the the cabinet and behind the grille.
It is recommended to clean both sides of the window glass first. If the window has a screen panel
included on the lower portion, the screen panel should be removed before installation.
Be sure the air conditioner has been securely and correctly installed according to the installation
instructions in this manual. Save this manual for possible future use in removing or installing this unit.
When handling the air conditioner, be careful to avoid cuts from the sharp metal fins on the front and
rear coils.
Prevent Accidents

IOM - RXTS Series
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Operation of Current Device
(Applicable to only units with a current detection device)
Cooling
operation
Outdoor temp:
Indoor temp:
64-109 ℉ /18-43 ℃ (64-125 ℉ /18-52 ℃
for special tropical models)
60-90 ℉ /16-32 ℃
Note: Performance may be reduced
outside of these operating
temperatures.
WARNING：(for using R290/R32 refrigerant only)
- Do not try to accelerate the defrosting process or methods of cleaning that are not
recommended by the manufacturer.
- The appliance shall be stored in a room without a continuously operating ignition source
(for example, open flames or an operating gas appliance) or an ignition source (for example,
an operating electric heater) close to the appliance. The appliance shall also be stored in a
room without ignition sources.
- Do not pierce or burn.
- Be aware that the refrigerants may not contain an odor.
- Compliance with national gas regulations shall be observed.
- 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.
- A warning that the appliance shall be stored in a well-ventilated area where the room size
corresponds to the room area as specified for operation.
- 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 authorizes
their competence to handle refrigerants safely in accordance with an industry recognized
assessment specification.
NOTICE:
Do not use this device to turn the unit on or off.
Always make sure the RESET button is pushed in for correct operation.
The power supply cord must be replaced if it fails to reset when either the TEST button is
pushed or if it cannot be reset. A new one can be obtained from the product manufacturer.
If power supply cord is damaged, it cannot be repaired. It MUST be replaced by one
obtained from the product manufacturer.
NOTE: This air conditioner is designed to be operated under the following
conditions:
The power supply cord contains a current device that senses damage to the power cord.
To test your power supply cord do the following:
1. Plug in the Air Conditioner.
2. The power supply cord will have TWO buttons on the plug head. Press the TEST button,
you will notice a click as the RESET button pops out.
3. Press the RESET button, again you will notice a click as the button engages.
4. The power supply cord is now supplying electricity to the unit. On some products, this is
also indicated by a light on the plug head.
Important Safety
Instructions
 Page 7 

IOM - RXTS Series
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- 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.
- DO NOT modify the length of the power cord or use an extension cord to power the unit.
DO NOT share a single outlet with other electrical appliances. Improper power supply can
cause fire or electrical shock.
- Please follow the instruction carefully to handle, install, clean, service the air conditioner to
avoid any damage or hazard. Flammable Refrigerant R32 is used within air conditioner. When
maintaining or disposing of the air conditioner, the refrigerant (R32 or R290) shall be
recovered properly, ensuring not to discharge it to the air directly.
- No open fire or devices that generate spark/arcing shall be around the air conditioner to avoid
causing ignition of the flammable refrigerant used. Please follow the instructions carefully to
store or maintain the air conditioner to prevent mechanical damage from occurring.
- Flammable refrigerant (R32) is used in this air conditioner. Please follow the instructions carefully
to avoid any hazards.
Caution: Risk of fire/
flammable materials
(Required for R32/R290 units only)
IMPORTANT NOTE:Read this manual
carefully before installing or operating
your new air conditioning unit. Make sure
to save this manual for future reference.
Explanation of symbols displayed on the unit (since the unit uses R32/R290
refrigerant):
WARNING
This symbol shows that this appliance used 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.
Important Safety
Instructions
 Page 8 

IOM - RXTS Series
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WARNINGS (for using R290/R32 refrigerant only)
1. Transport of equipment containing flammable refrigerants
See transport regulations
2. Marking of equipment using signs
See local regulations
3. Disposal of equipment using flammable refrigerants
See 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
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 minimised. For repair to the refrigerating
system, the following precautions shall be complied with prior to conducting work on the
system.
2) Work procedure
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.
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.
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.
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.
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.
Important Safety
Instructions
 Page 9 

IOM - RXTS Series
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WARNINGS (for using R290/R32 refrigerant only)
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.
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.
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
1) 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 isabsolutely
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.
2) 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.
Important Safety
Instructions
 Page 10

IOM - RXTS Series
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WARNINGS (for using R290/R32 refrigerant only)
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 sealant 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.
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. Opening of the refrigeration systems shall
not be done by brazing. The following procedure shall be adhered to:
Remove refrigerant;
Purge the circuit with inert gas;
Evacuate;
Purge again with inert gas;
Important Safety
Instructions
 Page 11 

IOM - RXTS Series
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WARNINGS (for using R290/R32 refrigerant only)
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. 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.
Important Safety
Instructions
 Page12 

IOM - RXTS Series
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Important Safety
Instructions
WARNINGS (for using R290/R32 refrigerant only)
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. Labeling
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.
 Page 13 

IOM - RXTS Series
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Installation Instructions
NOTICE: The unit you purchased may look like one of the followings:
 Page 14 
Installation
Instructions
Model A
Model B

IOM - RXTS Series
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 Page 15 
Installation
Instructions
NOTICE:
All the illustrations in this manual are for
explanation purpose only. The actual
installation may vary.
Model C
Model D

IOM - RXTS Series
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WINDOW REQUIREMENTS
Your air conditioner is designed to install in
standard double hung windows with opening
widths of 22-36”(559mm-914mm) and a
window height of 13.5”(343mm).
DANGER
Do not, under any circumstances, cut or
remove the third (ground) prong from the
power cord.
Do not change the plug on the power cord
of the air conditioner.
Aluminum house wiring may present
special problems- consult a qualified
electrician.
When handling the unit, be careful to
avoid cuts from sharp metal edges and
aluminum fins on front and rear coils.
TOOLS YOU WILL NEED
Phillips
Screwdriver
Level
Flat Head
Screwdriver
Pencil
Ruler or tape
measure
Scissors or knife
BEFORE YOU BEGIN
Read these instructions completely and
carefully.
IMPORTANT-Save these instructions for
local inspector ’ s use.
IMPORTANT-Observe all governing codes
and ordianaces.
Note to Installer- Be sure to leave these
instructions with the Consumer.
Note to Consumer- Keep these instructions
for future reference.
Skill level- Installation of this appliance
requires basic mechanical skills.
Completion time- Approximately 1 hour.
We recommend that two people install this
product.
Proper installation is the responsibility of
the installer.
Product failure due to improver installation
is not covered under the Limited Warranty.
You MUST use all supplied parts and use
proper installation procedures as described
in these instructions when installing this air
conditioner.
Installation is recommended to be comple-
ted by 2 people.
Wooden Windows
INNER
WINDOW SILL
INTERIOR
WALL
13.75" min
(349 mm)
22" to 36"
(558 mm to 914mm)
SEAL FOAM
Vinyl-Clad Windows
INNER
WINDOW SILL
13.75" min
(349 mm)
22" to 36"
(558 mm to 914mm)
SEAL FOAM
Drill and 1/8”
drill bit
Proper PPE
WINDOW-MOUNTED INSTRUCTIONS
Installation
Instructions
 Page 16 

IOM - RXTS Series
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NOTICE
Save carton and these Installation Instruc-
tions for future reference. The carton is the
best way to store unit during winter, or
when not in use.
If any piece of hardware is missing, DO
NOT INSTALL THE PRODUCT, and call
customer service.
* Denotes extra hardware provided in
separate bag.
Installation Hardware(on some models)
Side Arm Foam 2
Right Extension Arm – Short
(For 22”-26” windows) 1
Cotter Pin 2*
1
Open Window Bracket – RH 1
Main Support Pin 2*
Right Extension Arm
(For 26”-36” windows) 1
1Main Bracket
1/2” Type B Screw 2*
2*
Window Sash Lock
Window Sash Foam
Window Sealing Foam
Bracket Sealing Foam
Additional Side Arm Foam
1” Type A Screw 2*
2
1
1
1
1
Angled Support Arms
Horizontal Bracket
Spring Push Pin
Main Support
Right
Extension
Arm
Left
Extension
Arm
Rear Cross
Brace
Fig. 1
Lower sash must open sufficiently to allow a clear vertical opening of 13.75 inches. Side
louvers and the rear of the AC must have clear air space to allow enough airflow through
the condenser for heat removal. The rear of the unit must be outdoors, not inside a
building or garage. Find the center of your window and lightly mark with a pencil.
1. Prepare the Window
 Page 17 
Installation
Instructions
3*
1/4” Type B Screw
1/2” Type A Screw
Open Window Bracket – LH

IOM - RXTS Series
18
Remove the air conditioner, bracket and hardware from the carton and set on a flat surface.
A. Install the Main Support Bracket into
the window opening. Ensure that the
Horizontal Bracket and Extension Arms are
located on the indoor side of the window.
WARNING
Maintain control of the bracket until
installation is complete.
2. Prepare the Bracket
3. Install Support Bracket
A. Pressing the Spring Push Pin, adjust the Left Extension Arm out and then install the
Right Extension Arm.
Measure the width of the inner windowsill on your window. Making sure that the center
of the bracket will line up with the center of the window, adjust the Extension Arms to
the width just measured. Note, the bracket will be offset to the left when centered.
B. Apply Bracket Sealing Foam strips to the bottom of the bracket as shown.
Fig. 4
Center Adjust
Adjust
Fig. 2
Fig. 3
Apply Bracket
Sealing Foam
Apply Bracket
Sealing Foam
Bottom View
Apply Bracket
Sealing Foam
Bracket Sealing Foam
Bracket Sealing Foam
Installation
Instructions
 Page 18 

IOM - RXTS Series
19
Fig. 6
Vinyl Type Windows with a Lipped Sill
A1. Secure the bracket to the windowsill by drilling 1/8” pilot holes and installing the
1/2” Type A screws as shown in Fig. 6.
Wooden Windows
INSIDE
OUTSIDE
INSIDE OUTSIDE
Vinyl-Clad Windows
Vinyl Lip
Fig. 5
Fig. 7
Wooden Type Windows with a Flat Sill
A2. Secure the bracket to the windowsill by drilling 1/8” pilot holes and installing the
1/2” and 1” Type A screws as shown in Fig. 7.
B. Move the Angled Support Arms
toward the exterior wall until
the feet touch the wall. Place
the level on the bracket and
adjust the Support Arms so that
it is level or tilted 1/4 bubble
downward and towards the
outside.
Here is what
1/4 bubble on
the level
should look
like.
Depending on the
level used, place at
either location below
to check level.
Fig. 8
1/2” Type A 1/2” Type A
1” Type A
1” Type A
1/2” Type A 1/2” Type A
 Page 19 
Installation
Instructions

IOM - RXTS Series
20
Fig. 9
C. Insert the Main Support Pin
through the holes the Main
Support and Angled Support Arm.
Using the numbers on the Main
Support, repeat the adjustment
for the other Angled Support Arm
matching the hole number from
the first support arm.
D. Check the level again and
ensure the bracket feels secure.
After making any necessary
adjustments, insert the cotter
pins into the Main Support Pins.
Cotter Pin
E. If necessary, cover the holes on the front of the bracket with the Bracket Sealing Foam.
Fig. 10
Fig. 11
Cover holes with
Bracket Sealing Foam
Cover holes with
Bracket Sealing Foam
If further adjustment is needed,
use alternate holes where the
Main Supports attach to the
Horizontal Bracket
 Page 20 
Installation
Instructions