MrCool DIY E Star Series Operating instructions

Please read this manual carefully before installation and keep it for future reference.
Due to updates and constantly improving performance, the information and instructions within this
manual are subject to change without notice. Please visit www.mrcool.com/documentation to
ensure you have the latest version of this manual.
Version Date: 12-30-20
Installation & Owner’s
Manual
DIY® E Star™ Series

Contents
Page 1 mrcool.com
Safety Precautions
Warnings .................................................................................................................................. 3
Cautions ................................................................................................................................... 4
Parts Overview
Parts Diagram ......................................................................................................................... 5
Display Window ...................................................................................................................... 6
Accessories ................................................................................................................................... 7
Operating Instructions
Operating Temperature ......................................................................................................... 9
Manual Operation ................................................................................................................... 9
Care and Maintenance
DISCLAIMER: You are assuming the risk by handling materials containing refrigerants under pressure, that if not
handled properly, can cause bodilyinjury. If you do notfeel comfortable conducting this installation process,
!
1
2
3

Contents
Indoor Unit Installation ...........15
1. Selecting an installation location .........15
4. Prepare refrigerant piping ....................18
5. Mount indoor unit ..................................18
Outdoor Unit Installation ...... 19
1. Selecting an installation location ......19
2. Install drain joint .................................20
5
Refrigerant Piping Connections......................23
Electrical Connections .....................................32
Test Run..............................................................35
7
8
9
10
4
Page 2
mrcool.com
Electrical and Gas Leak Checks.......................34
Troubleshooting................................................37
.21
1. Prepare Exterior Wall Hole ............................................. 23
2. Unwind Quick Connect® Line Set to necessary length 23
3. Connect Line Set to Indoor Unit ..................................... 24
4. Connect Line Set to Outdoor Unit ................................ 26
5. Opening Refrigerant Valves of Outdoor Unit ............... 28
6. Wrap Piping Connections ............................................... 29
7. Connect drain pipe .......................................................... 30

Page 3
Safety Precautions
mrcool.com
Read Before Using
Incorrect usage may cause serious damage or injury.
.
WARNING
CAUTION
WARNING
DO NOT
DO NOT
unit at all times.
1.
2.
3.
4.
5.
Manual.
!
Safety Precautions
DISCLAIMER:You are assuming the risk by handling materials containing refrigerants under pressure, that if not
handled properly can cause bodilyinjury. If you do notfeel comfortable conducting this installation process,
The symbols below are used throughout this manual to indicate instructions that should
be followed closely or actions that should be avoided to prevent death, injury, and/or property damage.
This symbol indicates ignoring instructions may cause bodily injury, damage
to the unit, or other surrounding property.
When connecting the refrigerant piping, DO NOT allow any other substances or gases enter
the unit. The presence of other gasses or substances will lower the unit’s capacity, and may
cause abnormally high pressure in the operation cycle. This could cause an explosion and/or
injury.
This symbol indicates ignoring instructions may cause death or serious injury
This symbol indicates that you should NEVER perform the indicated action.
Install the unit in a firm, stable location that can support the weight of the unit. If the
installation location cannot support the weight of the unit, it could fall and cause serious injury
and/or damage.

Page 4
Safety Precautions
mrcool.com
Note about Flourinated Gasses:
7.
8
. All wiring must be properly arranged to ensure that the control board cover can close properly.
If the control board cover is not closed properly, it can lead to corrosion, which can cause the
connection points on the terminal to overheat, which car result in fire and/or electrical shock.
10.
DO NOT
combustible materials.
.
DO NOT
DO NOT
DO NOT
DO NOT
1.
2.
1
2.
the unit itself.
3.
4.
5.
If connecting power to fixed wiring, the following must be incorporated within it, in accordance with the wiring
rules; an all-pole disconnection device (which has at least 3 mm of clearances in all poles), and have a leakage
current that may exceed 10mA, the residual current device (RCD) having a rated residual operating current not
exceeding 30mA, and disconnection all must be present.
9.
11.
This appliance is not inteded for use by individuals (including children) with reduced physical, sensory, or mental
capabilities. It is also not intended for use by individuals with a lack of experience or 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 at all time to ensure that they do not play with the appliance.
operate your air conditioner in a room where it could be exposed to water, such as a bathroom or laundry
room. Exposure to excessive amounts of water may cause electrical components to short circuit.

Page 5
Safety Precautions
mrcool.com
Electrical
Access
Front Panel
Wall Mounting Plate
Fresh Air Filter
Airinlet rear
Air inlet si e
Air outlet
Air outlet bottom
Outdoor Unit
(Exterior/Condenser)
Air inlet rear
Electrical Access
Air Filter
NOTE: The installation must be performed in accordance with the requirement of local and
national standards. Both power cable and signal cable should be protected by the conduit.
NOTE ON ILLUSTRATIONS
Illustrations in this manual are for explanatory purposes. The actual shape of your unit may vary.
1
Parts Overview
Indoor Unit
(Interior/Air Handler)
Quick Connect® Line Set
(refrigerant pipe)

Overview - Display
mrcool.com
1. Digital Display:
Displays the Temperature Setting when the air conditioner is operational.
Displays the Room Temperature when in FAN mode.
Displays the self-diagnostic codes.
Displays “ ON” for three seconds when theTimer is ON and/or Fresh, Swing, Turbo, or Silence
feature is activated.
Displays “ OF” for three seconds when the Timer is switched OFF .
Displays “ OF” for three seconds when the Fresh, Swing, Turbo, or Silence feature is canceled.
Displays “ dF” when Defrosting operation is active.
Displays “ cF” when Anti-Cold Air feature is active in HEAT mode (when air temp is low).
Displays “ SC” during Self Clean operation (if feature is available).
Displays “ FP” when Freeze Protection is active, operating under 46.4 °F (8 °C) (if feature is available).
2. Units of Measurement:
Displays “ °C” for Celsius or, “
°F” for Fahrenheit. Default units are “°F” (Fahrenheit) and can be
switched by simultaneously pressing and holding both the up and down buttons on the remote
control.
According to the operation mode (heat/cool, etc.), the Units of Measurement will display in
· Under Cool or Dry mode, it always displays as cool colors (Blue).
· Under Heat mode, it always displays as a warm color (Red).
3. Wireless Mode:
Displays when the wireless control feature is activated.
NOTE: A guide for using the infrared remote can be found in the “Remote Control User Manual”
which is included in this literature package.
4. Energy Saving Mode:
Displays when Energy Saving Feature is active. Not available on units not equipped with this feature.
°
ECO
3
4
2
Fig. 1.2
Display (on front panel of indoor unit)

Page 7
Accessories
mrcool.com
1
(Sealant for Wall Sleeve)
(Only for use
when elevated)
1
1
1
1
1
1
Neoprene
Mounting plate
screw
Remote control
Fixing screw for remote
ST2.9 x 10
Dry battery AAA.LR03
Seal
Drain joint
Mounting plate
5
5
2
1
Optional
Parts
2
LOOKS LIKE...
The air conditioning system includes the following accessories. Use all of the
installation parts and accessories to install the air conditioner. Improper installation may
Note: Illustrations are for explanatory purposes only - The actual shape and size may vary.

Page 8mrcool.com
1
1
1
2
1
connectors of the pipe)
1
Accessories
2
(w/ Manual in
Installation & Owner’s
Manual
Remote Control
Manual
Smart Controller Kit
Sound deadening
pads
Quick Connect®
Line Set (refrigerant pipe)
Insulation material
LOOKS LIKE...
Pleaseread this manual carefully before installation and keep it for future reference.
Owner’s Manual
E-Star™ DIY Series
For more details visit www.MrCool.com
For more details visit www.MrCool.com
Pleaseread this manual carefully before installation and keep it for future reference.
Remote Control
User Manual
Plastic Wall Sleeve
1
Drain Pipe
1
16 ft (5 m)
Cardboard
Mounting Plate
Template
1

Page 9
Safety Precautions
mrcool.com
CAUTION
Manual Operation
Units are equipped with a button to run emergency operation mode. This button is used for manual
operation in case the remote control fails, or maintenance is necessary. This can be accessed by
opening the front panel.
Manual
Control
Button
(Forced cooling)
NOTE: The unit must be turned off before operating the
manual control button. If the unit is operational, continue
pressing the manual control button until the unit is off.
1.
2.
3.
• This button is used for testing purposes only.
Please do not use it unless necessary.
•To restore the remote control operation,
use the remote control directly.
Fig 2.1
2
Operating Instructions
Room Temperature
Cooling Operation Heating Operation Drying Operation
°C~32°C)
63°F~90°F
(0°C~30°C)
32°F~86°F
°C)
50°F~90°F
(0°C~50°C)
32°F~ F
(For the models with low
ambient cooling system)
C~24°C)
5°F~75°F
(0°C~50°C)
32°F~ F
Outdoor
Temperature
NOTE:
1.
2.

Page 10
Operating Instructions
mrcool.com
Range
Fig. 2.3
Horizontal Louver
Grill inside)
Vertical
Louver
Range
Fig. 2.2
Horizontal
CAUTION
DO NOT
the blower and suction side. The high speed fan
inside may cause injury.
DO NOT operate the unit for long periods of time
in cooling or dehumidifying mode with the airflow
direction set downward. This could cause
condensation to form on the surface of the vertical
louver and allow moisture to drop onto furnishings
or the floor.
DO NOT
move the vertical louver manually, as this
cause it to become out of sync. If this occurs, follow
these steps:
1. Turn off power to the unit
2. Remove wireless module from back of front
cover
3. Turn off power to the circuit at the breaker
4. Wait a few seconds and turn the power back on
at the breaker
5. Reinstall wireless module into front cover
6. Turn the power to the unit back on
NOTE: After a quick restart, the vertical louver may
remain static for approximately 10 seconds.
NOTE: Open angle of the vertical louver should not
be set too small, as it will restrict airflow and reduce
COOLING and HEATING performance of the unit.
·
·
·
Louver
Adjustment of the vertical and horizontal
louvers will change airflow direction of
the indoor unit to prevent discomfort
and/or uneven room temperatures.
Adjust Vertical Airflow (Up/Down) using Vertical
Louver (Fig 2.2):
This function is performed by using the remote control,
while the unit is operating. The Vertical louver can move
in small increments for each press, or continuously
swing up and down automatically. Please refer to the
“Remote Control User Manual” for further details.
Adjust Horizontal Airflow (Left/Right) using
Horizontal Louver (Fig 2.3 & Fig 2.4)
Move the deflector rod, located on the underside of the
unit, by pushing the tab to manually adjust the airflow
from side to side as desired.
Fig. 2.4

Page 11
Operating Instructions
mrcool.com
Basic Operation Modes:
Auto Operation:
SLEEP Operation:
hours before SLEEP
DRYING Operation:
LOW .
HEATING Operation:
supplement heating with other appliances.
·
·
·
performance.
·
function.
·
the unit.
·
hour
hour
Set
Temperature
SLEEP Operation While Cooling
SLEEP operation
8 hours
timer OFF
Set
Temperature
hour hour
SLEEP operation
8 hours
timer OFF
curtains while
heating also
helps keep the
heat in
Doors and
windows should
be kept closed
SLEEP Operation While Heating
Optimal Operation

Page 12
Operating Instructions
mrcool.com
Special Functions
Refrigerant Leakage Detection (optional):
Louver Angle Memory Function (optional):
Anti-Mildew Function (optional):
Optimal Operation:
Wireless Smart Control Function:
Clean Air Filter Reminder (optional):
LED button on
Replace Air Filter Reminder (optional):
LED button
Mute Function (optional):
Press the LED LED
When the unit is turned off, in COOL, DRY, or AUTO (cool) modes, it will continue to run for about 10
minutes with low fan airflow. This is to aid in drying any condensation that has formed inside the unit to
prevent mildew growth. Do not restart the air conditioner until the unit is completely off.

Operating Instructions
mrcool.com
Tab
CAUTION
Power supply must be disconnected before attempting
any kind of cleaning or service. Before performing
maintenance, turn the power off to the unit and then
disconnect the power to the circuit at the breaker.
Failure to do this could cause electrical shock.
DO NOT use benzene, thinner, polishing powder, or
similar solvents for cleaning. These may cause the
plastic to crack and/or deform.
DO NOT clean the unit with excessive amounts of water.
DO NOT touch the metal parts of the unit when
handling the sharp metal edges.
DO NOT
use water to clean inside the air
conditioner. Exposure to water can destroy the
insulation, leading to possible electric shock.
DO NOT use a chemically treated cloth or duster to
clean the unit.
DO NOT clean the unit with combustible cleaning
DO NOT
DO NOT
1
2
3
Care and Maintenance
expose the filter to direct sunlight, it may cause
it to shrink. Allow it to dry in the shade.
removing the filter. Injuries can occur when
DO NOT touch air freshening (Plasma) filter for at least
10 minutes after turning off the unit.
agents. These could cause fire or deformation.
wash air filter with water hotter than 104°F (40°C).
Wipe the unit with a soft dry cloth. If the unit is very dirty, wipe it with
a cloth soaked in warm water. DO NOT use bleach or abrasives.
NOTE: A clogged air filter can greatly reduce heating and
cooling efficiency of this unit. It is recommended to clean the
unit every 2 weeks.
Open the front by carefully lifting both ends at the same time.
As you continue lifting, at a certain angle there will be an audible
click and the lid will become self-supporting. Some models are
equipped with suspension bars that are required to prop the lid
open.
Use the filter tabs to lift filter slightly upward and then pull it
towards you.
1.
2.
Page 13

Page 14
Care and Maintenance
mrcool.com
Panel buckles
3.
4.
5.
.
7.
lowering the bottom into place.
8.
Preparation for Extended non-Operation:
1.
2.
3.
4.
5.
Pre-Season Inspection:
1.
2.
3.
4.
5.
4
3
5
6
The outdoor unit also requires periodic maintenance.
However, it is highly recommended you contact a
qualified service professional to perform this. Please do
not attempt to do this on your own.
Turn off the unit. Then, turn off the power to the
circuit at the breaker. The unit should be the only
appliance on this circuit.
Replace Batteries in Remote Control
Removal Install

Page 15 mrcool.com
Installation Summary - Indoor Unit
Installation Instructions
– Indoor Unit
PRIOR TO INSTALLATION:
Before installing the indoor unit, refer to the
label on the product box to make sure that
the model numbers of the indoor unit and
the outdoor unit match.
Step 1: Selecting an installation location
choose an appropriate location. The following
location for the unit.
P
following standards:
Good air circulation
Noise from the unit will not disturb
other people
Strong enough to support the weight of
the unit
DO NOT install unit in the following locations:
Near any source of heat, steam, or
combustible gas
or clothing
Near any obstacle that might block air
circulation
Near a doorway or where outside air may blow
directly on indoor unit
In a location subject to direct sunlight
NOTE ABOUT WALL HOLE:
4
Indoor Unit Installation
If there is no fixed refrigerant piping:
While choosing a location, be sure that
you leave ample room for a wall hole
(see the Drill Wall Hole for Connective
Piping step on the following pages) for
the signal cable and refrigerant piping,
which connect the indoor and outdoor
units. The default position for all piping
is the right-hand side of the indoor unit
(while facing the front of the unit). After
the piping and signal wire are installed,
use the provided neoprene (spray foam
can be used instead, if you prefer) to
pack the space left in hole, in order to
seal it and make it airtight.

mrcool.com
Indoor Unit Installation
Refer to Fig. 4.2 below to ensure proper distance from walls, ceiling, and floor when mounting unit:
1.
2.
3.
•
the unit
•
plate
4. Secure the mounting plate to the wall with the
5.
the wall.
NOTE FOR CONCRETE OR BRICK WALLS:
If the wall is made of brick, concrete, or a similar
material, drill 0.2 in. diameter (5 mm diameter)
holes in the wall and insert the sleeve anchors
provided. Secure the mounting plate to the
wall by tightening the screws directly into the
anchors.
1.
2.
3.
Fig. 4.2
CAUTION
When drilling the wall hole, be sure to avoid
wires, plumbing, nails, screws, and other
sensitive components.
Minimum Ceiling
Clearance
5.9 in (15 cm)
Minimum Side
Clearance
4.75 in (12 cm)
Minimum Side
Clearance
4.75 in (12 cm)
*For Ceilings GREATER than 9 ft.,
recommended distance from floor
90.55 in (230 cm)
*For Ceilings LESS than 9 ft.,
recommended distance from floor
78.55 in (200 cm)
Place the mounting plate against the wall in
a location meets the guidelines in the
Selecting an Installation Location step.
Refer to the Mounting Plate Dimensions
section for detailed information on
mounting plate sizes.
You must drill a hole in the wall for the refrigerant
piping, drainage pipe, and signal cable to pass
through in order to connect the indoor and outdoor
units.
Determine the location of the wall hole based on
the position of the mounting plate. Refer to the
Mounting Plate Dimensions (See Fig 4.5) to
assist you in determining the optimal position for
the hole, based on the type of mounting plate
provided with your unit.
Using a core drill, with a 3.54 in (90 mm)
diameter, drill a hole in the wall at a slight
downward angle, so that the indoor end of the
hole is higher than the outdoor end of the hole,
by approximately 0.2 in to 0.275 in (5 mm to 7
mm). This will ensure proper water drainage from
the indoor unit (See Fig. 4.3).
Insert the protective wall sleeve through the
hole of the inside wall, noting the amount it
protrudes from the exterior wall. Then, trim the
excess, with a utility knife or a saw, to make it
flush with the exterior wall. This will protect the
edges of the hole and help seal it when you
finish the installation process (See Fig 4.4).
NOTE
A cardboard template of the mounting plate is included
to be used as a more manageable way of determining
where to mount the mounting plate and drill the wall
hole. It can be placed against the wall in place of the
actual mounting plate for the previous step (See Fig 4.1).
Fig. 4.1

Page 17 mrcool.com
Indoor Unit Installation
MOUNTING PLATE DIMENSIONS
In order to ensure that you have ample room to
mount the indoor unit, the diagrams to the right
with the following dimensions:
• Height & Width of mounting plate
• Height & Width of indoor unit relative to plate
• Recommended position of wall hole
• Relative distances between screw/mounting
holes
•
Do not attempt a left rear wall hole.
Correct orientation of Mounting Plate
31.6 in (802 mm)
9.15 in (232 mm)
16.8 in (426 mm)
11.7 in (297 mm)
1.7 in (43 mm)
1.7 in
(43 mm)
1.7 in
(43 mm)
7.55 in (192 mm)
5.05 in (128 mm)
Series 12K Models
8.6 in (219 mm)
21.77 in (553 mm)
11.8 in (300 mm)
1.7 in (43 mm)
0.6 in (15 mm)
0.6 in (15 mm)
2.1 in
(53.5 mm)
1.8 in
(47 mm)
5.9 in (151 mm)
42.5 in (1080 mm)
13.2 in (335 mm)
Series 18K & 24K Models
Outline of indoor unit
when mounted to plate
Series 36K Models
Diameter
Outline of indoor unit
when mounted to plate
Diameter
Diameter
Outline of indoor unit
when mounted to plate
NOTE REGARDING WALL STUDS
on studs.
marked “US” on the metal bracket.
NOTE: Use a level in order to ensure your
mounting plate is mounted to the wall with
the correct orientation shown above.
Correct Angle to Drill Wall Hole
Keep in mind that the hooks on the mounting
plate are smaller than the holes on the back of
the unit. If you find that there is not enough room
to connect embedded pipes to the indoor unit, it
can be adjusted left or right by 1.25-1.95 in
(30-50 mm), depending on the model.
UNIT IS ADJUSTABLE
(30-50 mm)
(30-50 mm)
Adjustment range of indoor unit to the left or right
Wall
Indoor Outdoor
Fig. 4.3
0.2 - 0.3in
(5 - 7 mm)
Drill used to
create wall
hole
Wall Hole Sleeve Installation
Fig. 4.4
Fig. 4.5

Page 18
mrcool.com
Indoor Unit Installation
CAUTION
Be extremely careful not to dent or damage the
piping while bending it away from the unit, as
this could negatively affect the performance.
Fig. 4.7
Step 4: Prepare indoor unit refrigerant piping
The piping of the indoor unit is attached to the back of
the unit towards the bottom. It will be covered with
insulation, and there will also be a drain pipe with these.
This piping will need to be bent and prepared before
it can be fed through the wall hole.
1.
2.
NOTE: Refrigerant piping should exit the indoor
unit from the right-hand side (Refer to Fig 4.6)
Based on the position of the wall hole, relative to
the mounting plate, determine the necessary angle
the piping will need to be bent to pass through the
wall hole when the unit is mounted to the bracket.
Grip the refrigerant piping at the base of the bend.
Then, slowly, and with even pressure, bend the
piping away from the back of the unit roughly 90
degrees. The piping should be sticking straight out
from behind the unit once completed (Refer to
Fig 4.6).
Step 5: Mount the Indoor Unit
In the following steps the indoor unit will now be
mounted to the wall bracket and the piping and
wires will be fed through the wall hole.
Double-check that the ends of the refrigerant
pipes are sealed (screw on caps are still in
place) to prevent any dirt or foreign material
from entering the pipes.
Feed the signal wire (should be protected by
conduit) through the wall hole.
Carefully lift the indoor air handler, and slowly
feed the taped bundle of refrigerant pipes
and drain hose through the wall hole, as you
position it to mount to the wall bracket.
1.
2.
3.
3. Now, you will need to lightly tape the refrigerant
piping and drain pipe together in a bundle, using
electrical tape, making sure that the drain pipe is at
the bottom. DO NOT tape the ends of the piping
(connectors). Refer to Fig 4.7 and the image below
for the correct orientation of the piping when taping.
Refrigerant
piping
Drain hose
Tape
Fig. 4.6
The drain hose must be placed at the bottom of the
bundle. If it is not, it could cause the drain pan to
overflow, which could lead to fire or water damage.
DRAIN HOSE MUST BE ON BOTTOM
NOTE: Positioning the air handler on to the
wall bracket, while feeding the piping
through the wall hole, might be difficult for
a single person to manage. If so, it may be
necessary to seek the assistance of another
person for this step.
Slightly lean the top of the air handler toward
the wall and hook the top of the indoor unit
on the upper hook of the wall mounting plate.
Check that the unit is hooked firmly on the
mounting plate by applying slight pressure to
the left and right-hand sides of the unit. The
unit should not jiggle or shift.
Using even pressure, push down on the
bottom half of the unit. Continue pushing
down until the unit snaps onto the hooks along
the bottom of the mounting plate.
Again, check that the unit is firmly mounted to
the wall bracket by applying slight pressure to
the left and right-hand sides of the unit.
4.
5.
6.
7.

Page 19 mrcool.com
Indoor Unit Installation
Installation Instructions –
Outdoor Unit
Step 1: Selecting an installation location
choose an appropriate location. Use the following
guidelines to help you select an appropriate
location.
P
following guidelines:
Meets all spatial requirements shown in
)
Good air circulation and ventilation
the unit and will not cause vibration
Noise from the unit will not disturb others
Protected from prolonged periods of
exposure to direct sunlight or rain
DO NOT install unit in the following locations:
Near an obstacle that will block air inlets and
outlets
Near a public street, crowded areas, or where
noise from the unit will disturb others
Near animals or plants that will be harmed
by hot air discharge
Near any source of combustible gas
In a location that is exposed to large amounts
of dust
In a location exposed to a excessive
amounts of salty air
In a location that exposes the unit to large
amounts of forced water
Fig. 5.1
Minimum Clearance
between back of the unit
and wall:
**Ground Installed:
12 in (30 cm)
**Bracket Installed:
6 in (15 cm)
79in (200cm)
in front
12in (30cm)
on left
24in (60cm)
above
24in (60cm)
on right
Minimum clearance
in front of unit:
79 in (200cm)
Minimum clearance
on the left side
of unit: 12 in (30cm)
Minimum Clearance
above unit:
24 in (60cm)
Minimum Clearance
on the right side
of the unit: 24 in (60cm)
5
Outdoor Unit Installation