Midea 18K User manual

Owner’s Manual &
Installation Manual
IMPORTANT NOTE:
Read this manual carefully before installing
or operating your new air conditioning
unit. Make sure to save this manual for
future reference.
AIR-HANDLER AIR CONDITIONERS
Installation Manual

Page 2 
Read This Manual
Inside you’ll 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. These instructions
may not cover every possible condition of use, so common sense and attention to
safety is required when installing, operating and maintaining this product.
Improper installation, adjustment, alteration, service or maintenance can cause
property damage, personal injury or loss of life. Installation and service must be
performed by a licensed professional HVAC installer or equivalent service agency.
WARNING
Owner’s Manual & Installation Manual
SAFETY PRECAUTIONS .................................................................................... 3
ACCESSORIES ....................................................................................................... 7
INDOOR UNIT INSTALLATION ........................................................................ 8
OUTDOOR UNIT INSTALLATION ................................................................ 30
WIRING ................................................................................................................... 33
SPECIFICATION .................................................................................................. 48
AIR EVACUATION ................................................................................................ 51
TEST RUN .............................................................................................................. 53

Page 3 
SAFETY PRECAUTIONS
To prevent injury to the user or other people and property damage, the instructions
shown here must be followed. Incorrect operation due to ignoring of instructions may
cause harm or damage. The level of risk is shown by the following indications.
WARNING FOR PRODUCT USE
• If an abnormal situation arises (like a burning smell), immediately turn off the unit
and disconnect the power.
Call your dealer for instructions to avoid electric shock, fire or injury.
• Do not insert fingers, rods or other objects into the air inlet or outlet.
This may cause injury, since the fan may be rotating at high speeds.
• Do not use flammable sprays such as hair spray, lacquer or paint near the unit.
This may cause fire or combustion.
• Do not store gasoline or flammable substances near air conditioner.
Emitted gas may collect around the unit and cause explosion.
• Do not expose your body directly to cool air for a prolonged period of time.
• If the air conditioner is used together with burners or other heating devices,
thoroughly ventilate the room to avoid oxygen deficiency.
• In certain environments, such as kitchens, server rooms, etc., the use of specially
designed air-conditioning units is highly recommended.
• This unit is not designed for nonducted (freeblow) applications. Electric heat
strips and or blower is easily accessible without duct and presents electrocution
or injury hazard.
WARNING This symbol indicates the possibility of personnel injury or
loss of life.
CAUTION
This symbol indicates the possibility of property damage
or serious consequences.
NOTICE
This symbol addresses practices not related to physical
injury.
Safety
Precautions
WARNING FOR CLEANING AND MAINTENANCE
• Turn off the device and disconnect the power before cleaning.
Failure to do so can cause electrical shock.
• Do not clean the air conditioner with excessive amounts of water.
• Do not clean the air conditioner with combustible cleaning agents.
Combustible cleaning agents can cause fire or deformation.

Page 4 
CAUTION
• Turn off the air conditioner and disconnect the power if you are not going to use
it for a long time.
• Make sure that water condensation can drain unhindered from the unit.
• Do not operate the air conditioner with wet hands. This may cause electric shock.
• Do not use device for any other purpose than its intended use.
• Do not climb onto or place objects on top of the outdoor unit.
• As with any mechanical equipment, contact with sharp sheet metal edges can
result in personal injury. Take care while handling this equipment and wear
gloves and protective clothing.
Safety
Precautions
ELECTRICAL WARNINGS
• The product must be properly grounded at the time of installation, or electrical
shock may occur.
• For all electrical work, follow all local and national wiring standards, regulations,
and the Installation Manual. Connect cables tightly, and clamp them securely
to prevent external forces from damaging the terminal. Improper electrical
connections can overheat and cause fire, and may also cause shock. All electrical
connections must be made according to the Electrical Connection Diagram
located on the panels of the indoor and outdoor units.
• 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 and cause the connection points on the terminal to heat up, catch fire,
or cause electrical shock.
TAKE NOTE OF FUSE SPECIFICATIONS
• The air conditioner’s circuit board (PCB) may be designed with a fuse to provide
overcurrent protection.
• The specifications of the fuse, if equipped, are printed on the circuit board,
examples of such are T5A/250VAC and T10A/250VAC.

Page 5 
Safety
Precautions
WARNINGS FOR PRODUCT INSTALLATION
1. Installation must be performed by an authorized dealer or specialist.
Defective installation can cause water leakage, electrical shock, or fire.
2. Installation must be performed according to the installation instructions.
Improper installation can cause water leakage, electrical shock, or fire.
(In North America, installation must be performed in accordance with the
requirement of NEC or CEC by authorized personnel only.)
3. Contact an authorized service provider for repair or maintenance of this unit.
This appliance shall be installed in accordance with national wiring regulations.
4. Only use the included accessories, parts, and specified parts for installation.
Using non-standard parts can cause water leakage, electrical shock, fire, and
can cause the unit to fail.
5. Install the unit in a firm location that can support the unit’s weight. If the chosen
location cannot support the unit’s weight, or the installation is not done properly,
the unit may drop and cause serious injury and damage.
6. Install drainage piping according to the instructions in this manual. Improper
drainage may cause water damage to your home and property.
7. Do not install the unit in a location that may be exposed to combustible gas leaks.
If combustible gas accumulates around the unit, it may cause fire.
8. Do not turn on the power until all work has been completed.
9. When moving or relocating the air conditioner, consult experienced service
provider for disconnection and reinstallation of the unit.
10. Excessive Weight Hazard - Use two or more people when moving and installing
the unit. Failure to do so can result in back or other type of injury.
NOTE ABOUT FLUORINATED GASSES (NOT APPLICABLE TO THE UNIT
USING R290 REFRIGERANT)
1. This air-conditioning unit contains fluorinated greenhouse gasses. For specific
information on the type of gas and the amount, please refer to the relevant
label on the unit itself or the “Owner’s Manual - Product Fiche” in the packaging
of the outdoor unit. (European Union products only).
2. Installation, service, maintenance and repair of this unit must be performed by
a certified technician.
3. Product uninstallation and recycling must be performed by a certified technician.
4. When the unit is checked for leaks, proper record-keeping of all checks is
strongly recommended.

Page 6 
NOTICE
The functional static pressure range of the air conditioner on site is 0-0.80 in-H2O
(0-200 Pa).
The data below represents the static pressures at full required air flow used for
AHRI testing.
NOTICE
The maximum functional total external static pressure can not exceed 0.80 in WC
or 200 Pa. The airflow reduces significantly beyond 0.80 in WC or 200 Pa.
System design should allow for the increased resistance of filters as they
become dirty.
Safety
Precautions
Model 18-24K 30-36K 48-60K
Pressure 0.10 in-H2O (25 Pa) 0.15 in-H2O (37 Pa) 0.20 in-H2O (50 Pa)

Page 7 
The air conditioning system comes with the following accessories. Use all of the
installation parts and accessories to install the air conditioner. Improper installation
may result in water leakage, electrical shock and fire, or equipment failure.
Accessories (Packed with the indoor unit)
ACCESSORIES
Accessories
NOTICE
The remote control is only used to adjust the parameters.
Accessories (Packed with the outdoor unit)
Owner’s Manual & Installation Manual
Name Shape Quantity
1
Remote controller
1
2
2
1
2
Battery
Flare-to-braze adapter
Wired remote controller
Cable ties
2
Flare nut
4
Foam
2
Flare-to-braze adapter
Name Shape Quantity
1
1
Drain fitting
Gasket

Page 8 
Indoor Unit
Installation
CAUTION
• Install the indoor and outdoor units,
cables and wires at least 1 m (3.2’)
from televisions or radios to prevent
static or image distortion. Depending
on the appliances, a 1 m (3.2’)
distance may not be sufficient.
• If the indoor unit is installed on metal,
it must be electrically grounded.
INDOOR UNIT INSTALLATION
Indoor Unit Parts
Safety Precautions
Indoor Unit Installation Instructions
WARNING
• Securely install the indoor unit on a
structure that can sustain its weight.
If the structure is too weak, the unit
may fall and cause personal injury,
unit and property damage, or death.
• Do not install the indoor unit in a
moist environment as excessive
moisture can short the unit and
corrode the wiring.
• Danger of explosion. Keep flammable
materials and vapors, such as
gasoline, away from air handler. Place
air handler so that heating elements
are at least 18 inches (46 cm) above
the floor for a garage installation.
Failure to follow these instructions
can result in death, explosion, or fire.
The indoor unit should be installed in
a location that meets the following
requirements:
• Enough room for installation and
maintenance.
• Enough room for the connecting
refrigerant tubing and drainpipe.
• The structure that the equipment is
suspended from must support the
weight of the indoor unit.
• Room for properly sized return and
supply duct must be maintained.




CAUTION
Do not install the unit in the following
locations:
Areas with oil drilling or fracking.
Areas with caustic gases in the air,
such as near laundry vents.
Areas with strong electromagnetic
waves.
Areas that store flammable
materials or gas.
Rooms with high humidity, such as
bathrooms or laundry rooms.
WARNING
Please apply sealant around the places
where the wires, refrigerant pipes and
condensate pipes enter the cabinet.
WARNING
Use duct tape and/or Permagum to
seal closed space around the holes
where the drain lines exit the cabinet.
Warm air must not be allowed to
enter through any gaps or holes in the
cabinet.
Upow
Horizontal drain pan
Upflow
drain
pan
Coil compartment (Access panel removed)
Horizontal drain pan

Page 9 
Recommended Distances Between the Indoor Unit
Horizontal Installations
Vertical Installations
Indoor Unit
Installation
The distance between the mounted
indoor unit should meet the specifications
illlustrated in the following diagram.
The outlet side pipe length is 1.5m/59”.
Fixing instructions: When installed
vertically (upward or downward), the
lower end of the air outlet needs to be
connected to the L-shaped metal air
duct and fastened by screws.
Plenum Clearances
MINIMUM CLEARANCE
OF 25.4mm/1″ALL SIDES
FLEXIBLE
DUCT COLLAR
1.5m/59’’
WARNING
There must be an airtight seal between the bottom of the air handler and the return
air plenum. Use fiberglass sealing strips, foil duct tape, caulking, or equivalent sealing
method between the plenum and the air handler cabinet to ensure a tight seal. Return air
must not be drawn from a room where this air handler or any gas-fueled appliance (i.e.,
water heater), or carbon monoxide-producing device (i.e., wood fireplace) is installed.
Or
MODEL
(Btu/h) 18K~24K 30K~48K 60K
Dimensions
Length of A mm
1143 1245 1346
inch 45 49 53
Length of B mm
533 533 533
inch 21 21 21
Length of C mm
445 534 622
inch 17-1/2 21-1/50 24-1/2
Length of D mm
400 490 580
inch 15-3/4 19-5/16 22-27/32
Length of E mm
260 260 260
inch 10-1/4 10-1/4 10-1/4
Indoor parts installation size
(unit: mm/in)
A
B
C
E
D

Page 10 
Installation Place
Horizontal InstallationsVertical Installations
DUCT CONNECTIONS: Air supply and return may be handled in one of several ways
best place holder suited to the installation (See table for dimensions for duct inlet and
outlet connections). The vast majority of problems encountered with combination cooling
systems can be linked to improperly designed or installed duct systems. It is therefore
highly important to the success of an installation that the duct system be properly
designed and installed.
Use flexible duct collars to minimize the transmission of vibration/noise into the
conditioned space. Where return air duct is short, or where sound is could potentially to
be a problem, sound absorbing liner should be used inside the duct.
Insulation of duct work is a must where it runs through an unconditioned space during
the cooling season. The use of a vapor barrier is recommended to prevent absorption
of moisture from the surrounding air into the insulation. The supply air duct should
be properly sized by use of a transition to match unit opening. All ducts should be
suspended using flexible hangers and never fastened directly to the structure. This unit is
not designed for nonducted (freeblow) applications. Duct work should be fabricated and
installed in accordance with local and/or national codes.
NOTICE
This product filter is only used for energy efficiency sampling test, the user needs
to install a filter of their choice.
Recommended size of filter
(unit: mm/inch)
24inch(min)
30 inch (min)
24inch(min)
30 inch (min)
W
D
t
MODEL (Btu/h) 18K~24K 30K~48K 60K
Length of W mm
406.4 495.3 584.2
inch 16 20 23
Length of D mm
508 508 508
inch 20 20 20
Length of tmm
25.4 25.4 25.4
inch 111
Indoor Unit
Installation
Indoor Unit
Installation

Page 11 
Mount Positions
The units can be installed in a vertical
(down and up) and Horizontal (right
and left) configuration.
Horizontal Installations
Vertical Up Installations
NOTICE
For horizontal installation, a secondary
drain pan (not supplied) must be installed.
Please follow these steps to perform
Vertical up installation and Horizontal
right installation:
WARNING
• A field-fabricated secondary drain pan, with a drain pipe to the outside of the
building, is required in all installations over a finished living space or in any area that
may be damaged by overflow from the main drain pan. In some localities, local codes
may require a secondary drain pan for any horizontal installation.
• This unit is not designed for nonducted (freeblow) applications. Electric heat strips and
or blower is easily accessible without duct and presents electrocution or injury hazard.
downowupow
horizontal left
horizontal right
1. Open the upper cover.
2. Open the cover of the electronic control box.
3. Connect the wire according to the wiring
diagram.
4. Connect the pipes.
5. Install the drainage pipes.
Indoor Unit
Installation
Indoor Unit
Installation

Page 12 
NOTICE
Vertical up and horizontal left
installation does not need to change
the direction of evaporator.
NOTICE
The unit may be installed in one of the
upflow, downflow, horizontal left or
horizontal right orientations.
Indication of the position of each
temperature sensor of the evaporator:
18-24K model
30-48K model
60K model
T2A
T2
EEV
T2B
T1
T2
T2A
T2B
T1
T2
T2A
T2B
T1
EEV
EEV
Reversing instructions:
1. Remove the filter door, then take the
filter off.
2. Remove the upper cover assembly.
3. Remove evaporator cover plate.
Indoor Unit
Installation

Page 13 
NOTICE
T2A and T2B are only available for
some models.
4. Unplug temperature sensors T1, T2,
T2A, T2B and electronic expansion
valve (EEV) from the control board.
T1: Room temperature sensor
T2: Evaporator central sensor plug
T2A: Evaporator intput sensor plug
T2B: Evaporator output sensor plug
5. Remove T1, T2, T2A, T2B, EEV sensor
wire ties.
T2
T2A&T2B
T1
EEV
6. Take out the evaporator and drain
pan and rotate 180°.
7. Adjust the position of the mounting
parts.
8. Reinstall the evaporator and drain
pan.
Indoor Unit
Installation

Page 14 
NOTICE
The wire body needs to pass through
the wire groove from the drain pan and
be stuck on the hook of the drain pan.
9. Reinstall T1, T2, T2A, T2B sensor
plugs and electronic expansion valve
(EEV) and tie up the sensor wires.
10. The evaporator is assembled in place.
11. Reinstal evaporator cover plate.
12. Connect the wire according to the
wiring diagram.
th
Use cable ties
to fix the room
temperature
sensor as
shown in the
figure.
Cut the foam gasket.
Remove knockouts as
shown in the figure.
Hook the wire into the
buckle and go down
from the wire slot.
Replace foam gasket.
Indoor Unit
Installation

Page 15 
NOTE ON PURCHASING PIPES
Installation requires pvc pipe or other
suitable material per local and national
codes, which can be obtained at your
local hardware store or dealer.
13. Reassemble the upper cover. 14. Reinstal the filter and filter cover plate.
15. Connect the pipes.
16. Install the drainage pipes.
Drainpipe Installation
The drainpipe is used to drain water away
from the unit. Improper installation may
cause unit and property damage.
CAUTION
• Insulate all piping to prevent
condensation, which could lead to
water damage.
• If the drainpipe is bent or installed
incorrectly, water may leak and cause
property damage.
• In HEAT mode, the outdoor unit will
discharge water. Ensure that the drain
hose is placed in an appropriate area
to avoid water damage and slippage.
• Do not pull the drainpipe forcefully.
This could disconnect it.
WARNING
After removal of drain pan plug(s),
check drain hole(s) to verify that
drain opening is fully open and free
of any debris. Also check to make
sure that no debris has fallen into
the drain pan during installation that
may plug up the drain opening.
Seal around the exiting drain pipe,
liquid and suction lines to prevent
infiltration of humid air.
On units of this type, where the
blower “draws” rather than “blows”
air through the coil, traps must be
installed in the condensate drain
lines (primary and auxiliary, if used).
Traps prevent the blower from
drawing air through the drain lines
into the air supply.
Indoor Unit
Installation

Page 16 
Vertical Installations
These units operate with a negative
pressure at the drain connections and a
drain trap is required.
The trap needs to be installed as close to
the unit as possible. Make sure the top of
the trap is below the connection to the
drain pan to allow complete drainage of
the pan.
Vent T
Anti-syphon
air vent
Lean over
1/50
Drain Trap
>50mm(2”)
>50mm(2”)
>50mm(2”)
NOTICE
Horizontal runs must also have an
anti-siphon air vent (standpipe)
install ahead of the horizontal run to
eliminate air trapping.
NOTE ON DRAINPIPE INSTALLATION
• The Figure shows how to trap
or plug all drains during vertical
discharge.
• The Figure shows how to trap or
plug all drains during right-hand
discharge.
• The seal plug are supplied as
accessories and should be screwed
tightly only by hand.
• Incorrect installation could cause
water to flow back into the unit and
flood.
NOTICE
The drainpipe outlet should be at
least 5 cm (1.9 in) above the ground.
If it touches the ground, the unit may
become blocked and malfunction.
PRIMARY DRAIN
Main drain hole Overow drain
h
PRIMARY DRAIN
Main drain hole Overflow drain hole
VERTICAL DISCHARGE
Indoor Unit
Installation

Page 17 
REFRIGERANT PIPING CONNECTION
Safety Precautions
WARNING
• All field piping must be completed by a licensed technician and must comply with the
local and national regulations.
• When the air conditioner is installed in a small room, measures must be taken to
prevent the refrigerant concentration in the room from exceeding the safety limit in the
event of refrigerant leakage. If the refrigerant leaks and its concentration exceeds its
proper limit, hazards due to lack of oxygen may result.
• When installing the refrigeration system, ensure that air, dust, moisture or foreign
substances do not enter the refrigerant circuit. Contamination in the system may cause
poor operating capacity, high pressure in the refrigeration cycle, explosion or injury.
• Ventilate the area immediately if there is refrigerant leakage during the installation.
Leaked refrigerant gas can be both toxic and flammable. Ensure there is no refrigerant
leakage after completing the installation work.
Notes On Pipe Length and Elevation
Ensure that the length of the refrigerant pipe, the number of bends, and the drop height
between the indoor and outdoor units meets the requirements shown in the following table:
The Maximum Length And Drop Height
Based on Models. (Unit: m/ft.)
CAUTION
Oil traps
If oil flows back into the outdoor unit’s compressor, this might cause liquid
compression or deterioration of oil return. Oil traps in the rising gas piping can
prevent this. An oil trap should be installed every 6m (20ft) of vertical suction line
riser (<36000Btu/h unit). An oil trap should be installed every 10m (32.8ft) of vertical
suction line riser (≥36000Btu/h unit). See diagram for trap sizing and placement.
10m/32.8ft
(≥36000Btu/h unit)
6m/20ft
(＜36000Btu/h unit)
10m/32.8ft
(≥36000Btu/h unit)
6m/20ft
(＜36000Btu/h unit)
Indoor unit/
Outdoor unit
Indoor unit/
Outdoor unit
Type of
model
Capacity
(Btu/h)
Length
of
piping
(m/ft)
Maximum
drop
height
(m/ft)
North
America,
Australia
and the EU
frequency
conversion
Split Type
<15K 25/82 10/32.8
15K - <24K 30/98.4 20/65.6
24K - <36K 50/164 25/82
36K - 60K 65/213 30/98.4
Indoor Unit
Installation

Page 18 
CAUTION
Insulate both the gas and liquid
piping to prevent water leakage.
Step 1: Cut pipes
When preparing refrigerant pipes,
take extra care to cut and flare them
properly. This will ensure efficient
operation and minimize the need for
future maintenance.
1. Measure the distance between the
indoor and outdoor units.
2. Using a pipe cutter, cut the pipe
a little longer than the measured
distance.
3. Make sure that the pipe is cut at a
perfect 90° angle.
Step 2: Remove burrs
Burrs can affect the air-tight seal of
refrigerant piping connection. They must
be completely removed.
1. Hold the pipe at a downward angle to
prevent burrs from falling into the pipe.
2. Using a reamer or deburring tool, remove
all burrs from the cut section of the pipe.
Step 3: Flare pipe ends
Proper flaring is essential to achieve an
airtight seal.
1. After removing burrs from cut pipe,
seal the ends with PVC tape to prevent
foreign materials from entering the pipe.
2. Sheath the pipe with insulating material.
3. Place flare nuts on both ends of pipe.
Make sure they are facing in the right
direction, because you can’t put them on
or change their direction after flaring.
Connection Instructions – Refrigerant Piping
Name Shape Quantity (PC)
Connecting pipe
assembly
Liquid side Ø9.52mm (3/8in) Parts you must purchase
separately.
Consult the dealer about
the proper pipe size of the
unit you purchased.
Gas side
Ø19mm (3/4in) 4 Ton
Ø22mm (7/8in) 5 Ton only
Pipe
Reamer
Point down
Oblique Rough Warped
90°
Flare nut
Copper pipe
DO NOT DEFORM PIPE
WHILE CUTTING
Be extra careful not to damage, dent,
or deform the pipe while cutting.
This will drastically reduce the
heating efficiency of the unit. 4. Remove PVC tape from ends of pipe
when ready to perform flaring work.
Indoor Unit
Installation

Page 19 
Step 4: Connect pipes
Connect the copper pipes to the indoor unit
first, then connect it to the outdoor unit. You
should first connect the low-pressure pipe, then
the high-pressure pipe.
NOTICE
Use both a spanner and a
torque wrench when connecting
or disconnecting pipes to/from
the unit.
CAUTION
• Ensure to wrap insulation
around the piping. Direct
contact with the bare piping
may result in burns or
frostbite.
• Make sure the pipe is properly
connected. Over tightening
may damage the bell mouth
and under tightening may
lead to leakage.
Pipe
gauge
(mm)
Tightening
torque
Flare dimension (A)
(Unit: mm/Inch)
Flare shape
Min. Max.
Ø6.35
(1/4”)
18-20 N.m
(13-15 ft lb) 8.4/0.33 8.7/0.34
R0.4~0.8
45°±2
90 °
±4
A
Ø9.52
(3/8”)
25-26 N.m
(18.5-19.5 ft lb) 13.2/0.52 13.5/0.53
Ø12.7
(1/2”)
35-36 N.m
(25.5-26.5 ft lb)
16.2/0.64 16.5/0.65
Ø16
(5/8”)
45-47 N.m
(33-34.5 ft lb) 19.2/0.76 19.7/0.78
Ø19
(3/4”)
65-67 N.m
(48-49.5 ft lb) 23.2/0.91 23.7/0.93
Ø22
(7/8”)
75-85 N.m
(55.5-62.5 ft lb)
26.4/1.04 26.9/1.06
PIPING EXTENSION BEYOND FLARE FORM
5. Clamp flare form on the end of the pipe.
The end of the pipe must extend beyond
the flare form.
6. Place flaring tool onto the form.
7. Turn the handle of the flaring tool clockwise
until the pipe is fully flared.
8. Remove the flaring tool and flare form, then
inspect the end of the pipe for cracks and
even flaring.
Flare form
Pipe
1. When connecting the flare
nuts, apply a thin coat of
refrigeration oil to the flared
ends of the pipes.
2. Align the center of the two
pipes that you will connect.
3. Tighten the flare nut as tightly
as possible by hand.
4. Using a spanner, grip the nut
on the unit tubing.
5. While firmly gripping the nut,
use a torque wrench to tighten
the flare nut according to the
torque values in the table.
Indoor Unit
Installation

Page 20 
NOTE ON MINIMUM BEND RADIUS
Carefully bend the tubing in the middle
according to the diagram below.
DO NOT bend the tubing more than
90° or more than 3 times.
NOTICE
DO NOT intertwine signal cable with
other wires. While bundling these
items together, do not intertwine or
cross the signal cable with any other
wiring.
6. Thread this pipeline through the
wall and connect it to both the
indoor and outdoor units.
7. Evacuate air and moisture from
refrigerant lines.
8. Insulate all the piping, including the
valves of the outdoor unit.
9. Open the stop valves of the
outdoor unit to start the flow of the
refrigerant between the indoor and
outdoor unit.
CAUTION
Check to make sure there is no
refrigerant leak after completing
the installation work. If there is a
refrigerant leak, ventilate the area
immediately and evacuate the
system (refer to the Air Evacuation
section of this manual).
60K Air-Handler Air Conditioners
Refrigerant Piping Connection
Complete the indoor unit connection pipe
assembly as shown below, use flare-to-
braze (3/4” to 7/8”) and flare-to-braze
(3/8” to 3/8”) adapters to connect 7/8“ Line
set. If you connect it in a way other than
the one shown in the gure, it will cause the
performance of the product to decrease.
Flare-to-braze (3/8" to 3/8")
Flare-to-braze (3/4" to 7/8")
3/8" Service valve
3/8" Line set
3/4" Service valve
7/8" Line set
After the unit is installed, Wrap the valve
body with insulation material to prevent
condensation.
Indoor Unit
Installation
min-radius 10cm (3.9”)
Use appropriate tool
x
Thermal insulation
material
Thermal
insulation
material