Carrier DLFSOAH User manual

Specifications subject to change without notice.
Fig. 1 — Sizes 06K - 18K
NOTE: Read the entire instruction manual before starting the
installation.
Images are for illustration purposes only. Actual models
may differ slightly.
TABLE OF CONTENTS
PAGE
SAFETY CONSIDERATIONS........................................................2
ACCESSORIES................................................................................3
PARTS..............................................................................................4
SYSTEM REQUIREMENTS...........................................................5
WIRING ...........................................................................................5
DIMENSIONS..................................................................................6
PRIOR TO INSTALLATION ..........................................................7
Step 1 - Select Unit Location............................................................7
Step 2 - Indoor Unit Installation .......................................................7
Step 3 - Optional Parts Installation...................................................9
ELECTRICAL DATA......................................................................10
CONNECTION DIAGRAMS ..........................................................10
WIRING DIAGRAM .......................................................................10
CAPACITY SETTING.....................................................................11
DRAIN PIPE INSTALLATION ......................................................12
REFRIGERANT PIPING CONNECTION......................................13
CONNECTION INSTRUCTIONS - REFRIGERANT PIPING......14
OPTIONAL PARTS INSTALLATION...........................................19
ELECTRICAL CONNECTIONS.....................................................20
TROUBLESHOOTING ...................................................................22
DUCTLESS START-UP CHECKLIST - Single Zone ....................23
DLFSOAH
Installation Instructions
One Way Cassette Ductless Split Unit System - Sizes 06K - 18K

DLFSOAH: Installation Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
2
SAFETY CONSIDERATIONS
Improper installation, adjustment, alteration, service, maintenance, or use
can cause explosion, fire, electrical shock, or other conditions which may
cause death, personal injury or property damage. Consult a qualified
installer, service agency, or your distributor or branch for information or
assistance. The qualified installer or agency must use factory-authorized
kits or accessories when modifying this product. Refer to the individual
instructions packaged with kits or accessories when installing.
Follow all safety codes. Wear safety glasses, protective clothing and
work gloves. Have a fire extinguisher available. Read these instructions
thoroughly and follow all warnings or cautions included in the literature
and attached to the unit. Consult local building codes and the current
editions of the National Electrical Code (NEC) NFPA 70.
In Canada, refer to the current editions of the Canadian Electrical
Code CSA C22.1. Recognize safety information.
This is the safety-alert symbol . When you see this symbol on the
unit and in instruction manuals, be alert to the potential for personal
injury. Understand the signal words DANGER, WA R N I N G , and
CAUTION. These words are used with the safety-alert symbol.
DANGER identifies the most serious hazards which will result in
severe personal injury or death. WARNING signifies hazards which
could result in personal injury or death. CAUTION is used to identify
unsafe practices which may result in minor personal injury or product
and property damage. NOTE is used to highlight suggestions which
will result in enhanced installation, reliability, or operation.
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury or
death. Before installing, modifying, or servicing system, main
electrical disconnect switch must be in the OFF position. There
may be more than 1 disconnect switch. Lock out and tag switch
with a suitable warning label.
WA R N I N G
EXPLOSION HAZARD
Failure to follow this warning could
result in death, serious personal injury,
and/or property damage.
Never use air or gases containing oxygen
for leak testing or operating refrigerant
compressors. Pressurized mixtures of air
or gases containing oxygen can lead to
an explosion.
WA R N I N G
EQUIPMENT DAMAGE HAZARD
Failure to follow this caution may result in equipment damage or
improper operation.
Do not bury more than 36 in. (914 mm) of refrigerant pipe in the
ground. If any section of pipe is buried, there must be a 6 in. (152
mm) vertical rise to the valve connections on the outdoor units.
If more than the recommended length is buried, refrigerant may
migrate to the cooler buried section during extended periods of
system shutdown. This causes refrigerant slugging and could
possibly damage the compressor at start-up.
CAUTION

DLFSOAH: Installation Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
3
ACCESSORIES
The system is shipped with the following accessories (see Table 1). Use all of the installation parts and accessories to install the system. Improper installation
may result in water leakage, electrical shock and fire, or cause the equipment to fail.
Keep the installation manual in a safe place and do not discard any other accessories until the installation work has been completed.
Table 1 — Accessories
Table 2 — Accessories (Pipe)
NAME SHAPE QUANTITY
Cable Tie 6
Drainpipe Adapter 1
Screw kits 1
(8,8,2,2,3)
Tubing Cover 1
Remote Controller 1
Wire Controller (optional) 1
Rubber Grommet 1
Wi-Fi Dongle (optional) 1
Panel 1
Brass Nut 2
NAME SHAPE QUANTITY (PC)
Connecting
Pipe Assembly
Liquid Side 1/4in (Φ6.35) These parts must be purchased separately.
Consult the dealer about the proper pipe size of
the unit purchased.
Gas Side 3/8in (Φ9.52)
1/2in (Φ12.7)

DLFSOAH: Installation Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
4
PARTS
Fig. 2 — System Components
NOTE: Illustrations in this manual are for reference only. The actual shape of the indoor unit and parts may differ slightly.
1. Air Inlet (with air filter installed)
2. Air Flow Louver
3. Hanging Bracket
4. Display Panel
5. Drainage Pipe
6. Refrigerant Piping
7. Air Inlet
8. Air Outlet
9. Remote Controller
10. Outdoor Unit Power Cable (field supplied by installing contractor)
NOTES:
- If the outdoor unit is higher than the indoor unit, prevent rain from
flowing into the indoor unit along the connection pipe by making a
inverted trap in the connection pipe before it enters the wall to the
indoor unit. This ensures that rain drips from the connection pipe
before it enters the wall.
- Piping and the interconnecting wiring are field supplied.
- Figure 2 is a sketch. Different models may differ slightly.
The units listed in Table 3 are addressed in these installation instructions.
Table 3 — Indoor Units
NOTE: The installation must be performed in accordance with the
requirement of local and national standards. The installation
may differ slightly in some areas.
ʒ
ʓ
ʔ
ʕ
ʖ
ʗ
ʘʘ
ʙ
Disconnect Switch (Factory Installed/Standard)


Outdoor unit power cable

Hanging bracket
DESCRIPTION BTUH V-PH-HZ ID MODEL NO.
CASSETTE
6
208/230-1-60
DLFSOAH09XAK
9
12 DLFSOAH18XAK
18

DLFSOAH: Installation Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
5
SYSTEM REQUIREMENTS
Allow sufficient space for airflow and unit service. See Fig. 3 — on page 6 for the minimum required distances between the unit and walls or ceilings.
Table 4 — Indoor Unit Pipe Sizes
WIRING
All wires must be sized per NEC (National Electrical Code) or CEC
(Canadian Electrical Code) and local codes. See the rating plate and/or
the installation instructions of the compatible outdoor unit for MCA
(minimum circuit amps) and MOCP (maximum over current protection)
to correctly size the wires and the disconnect fuse or breakers
respectively.
Recommended Connection Method for Power and
Communication Wiring:
The main power is supplied to the outdoor unit. The field supplied 14/3
power/communication wiring from the outdoor unit to the indoor unit
consists of four (4) wires and provides the power for the indoor unit. Two
wires are high voltage AC power, one is communication wiring and the
other is a ground wire. Wiring between the indoor and outdoor unit is
polarity sensitive. The use of BX wire is NOT recommended.
If installed in a high Electromagnetic field (EMF) area and
communication issues exists, a 14/2 stranded shielded wire can be used to
replace wires 2 and 3 between the outdoor unit and indoor unit landing
the shield onto ground in the outdoor unit only.
NOTE: The main power is supplied to the outdoor unit. When
disconnecting the power of the outdoor unit, the indoor unit
would lose power. A disconnect switch is not required on the
Indoor unit side on the wiring between the Outdoor and
Indoor unit. A 3 pole disconnect may be used for extra
protection between the Indoor and Outdoor Unit.
UNIT SIZES 6K
(208/230V)
9K
(208/230V)
12K
(208/230V)
18K
(208/230V)
GAS PIPE in 3/8” 3/8” 1/2” 1/2”
(mm) 9.52 9.52 12.7 12.7
LIQUID PIPE in 1/4” 1/4” 1/4” 1/4”
(mm) 6.35 6.35 6.35 6.35
EQUIPMENT DAMAGE HAZARD
Failure to follow this caution may result in equipment damage
or improper operation.
Wires should be sized based on NEC and local codes.
WA R N I N G
EQUIPMENT DAMAGE HAZARD
Failure to follow this caution may result in equipment damage
or improper operation.
Be sure to comply with local codes while running wire from
the indoor unit to the outdoor unit.
Every wire must be connected firmly. Loose wiring may
cause the terminal to overheat or result in unit malfunction. A
fire hazard may also exist. Ensure all wiring is tightly
connected.
No wire should touch the refrigerant tubing, compressor or
any moving parts.
Disconnecting means must be provided and shall be located
within sight and readily accessible from the air conditioner.
Connecting cable with conduit shall be routed through the
hole in the conduit panel.
CAUTION

DLFSOAH: Installation Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
6
DIMENSIONS
Fig. 3 — Dimensions
Installation place (unit: inch/mm)
16.65in(423mm)
13.19in(335mm)
43.5in(1105mm)
9.84in(250mm)
53.54in(1360mm)
18.4in(475mm)
8.07in(205mm)
(unit: inch/mm)
Indoor parts installation size
≤ 5/8 in(16mm)
＞7.87 in(200mm)
Ceiling hole
air inlet
air outlet
Ceiling Wall

DLFSOAH: Installation Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
7
PRIOR TO INSTALLATION
Before installing the indoor unit, ensure the compatibility with the
outdoor unit using the product data as a reference. It is also necessary to
confirm the proper application of the equipment and to perform a heat
load calculation for proper sizing.
Step 1 - Select Unit Location
Before installing the indoor unit (cassette), select an appropriate location.
The following are standards that will help you choose an appropriate
location for the unit.
Proper installation locations meet the following standards:
• Enough room for installation and maintenance
• Enough room for the line set and drainpipe
• A horizontal ceiling and a structure that can sustain the weight of the
indoor unit
• The air inlet and outlet are not impeded
• The airflow can fill the entire room
• The is no direct radiation from heaters.
Step 2 - Indoor Unit Installation
Ensure that only specified components are used for the installation.
1. Connect the wire to the indoor unit.
a. Remove the four screws to open the indoor control box and
disconnect switch box.
Fig. 4 — Remove 4 screws
b. Remove the electrical knockout on the disconnect switch box.
Fig. 5 — Remove the Electrical Knockout
DO NOT install the unit in the following locations:
• Areas with oil drilling or fracking
• Coastal areas with high salt content in the air
• Areas with caustic gases in the air, such as near hot springs
• Areas with power fluctuations, such as factories
• Enclosed spaces, such as cabinets
• Areas with strong electromagnetic waves
• Areas that store flammable materials or gas
• Rooms with high humidity, such as bathrooms or laundry rooms.
CAUTION
PRODUCT INSTALLATION
• Installation must be performed by an authorized dealer or specialist.
A defective installation can cause water leakage, electrical shock, or
fire.
• The 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 requirements of NEC or CEC by authorized
personnel only.)
• Contact an authorized service technician for repair or maintenance of
this unit. This appliance must be installed in accordance with local
codes.
• Only use the included accessories, parts, and specified parts for
installation. Using non-standard parts can cause water leakage,
electrical shock, fire, or unit failure.
• Install drainage piping according to the instructions in this manual.
Improper drainage may cause water damage to your home and
property.
•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 a fire.
•DO NOT turn on the power until all work has been completed.
• When moving or relocating the system, consult experienced service
technicians for the disconnection and re-installation of the unit.
WA R N I N G
Four screws
electrical knockout

DLFSOAH: Installation Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
8
c. Connect the wire to the disconnect switch according to the
wire connecting diagram.
Fig. 6 — Connect wire to disconnect switch
d. Fasten and secure the cable body with a tie.
Fig. 7 — Fasten and secure the cable body
e. Install the disconnect switch cover and secure the two screws.
Fig. 8 — Reinstall the cover
321
TO OUTDOOR UNIT
TO INDOOR UNIT MAIN BOARD
1 2 3
Y/G
Disconnect
Switch
The ground wire should be tightened firmly.
WA R N I N G
Two screws

DLFSOAH: Installation Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
9
Step 3 - Optional Parts Installation
Wire Controller
For the function introduction, operation instruction and installation, refer
to the wire controller installation and owner’s manual. However, for this
unit, follow the steps for wire connection.
NOTE: If you select this configuration, it is recommended that the
installation of this wire controller occur during the indoor
unit installation.
1. Remove the electrical knockout from the disconnect switch box.
Fig. 9 — Remove the electrical knockout
2. Connect the wire from the control box.
Fig. 10 — Connect Wire from Control Box
3. Connect the other side of the connecting cable to the wire controller.
Fig. 11 — Connect the other side of the connecting
cable
NOTE: Reserve a length of the connecting wire for periodic
maintenance. If there is a connection lug at the end of the
shielded wire, the connection lug should be properly
grounded.
Pre-cutting cover both
holes can cross the wire.
Select one to install
the rubber ring.
INDOOR UNIT
MAIN BOARD
TO 485 WIRE
CONTROLLER
CN40
4
for ground
wire
CN40
4-core wire
CN41
2-core wire (customer purchases wiring)
Pass a tie through
the hole to x wire .
Wire controller
The connective wires group
shielded wire (some units)
Follow the local regulations and take measures to isolate high
and low voltages.
WA R N I N G

DLFSOAH: Installation Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
10
ELECTRICAL DATA
Table 5 — Electrical Data
CONNECTION DIAGRAMS
Fig. 12 — Connection Diagram Sizes 06K-18K
WIRING DIAGRAM
Fig. 13 — Wiring Diagram Sizes 06K-18K
ONE WAY CASSETTE 6K
(208/230V)
9K
(208/230V)
12K
(208/230V)
18K
(208/230V)
Running Current (A) 0.8 0.8 1.5 1.5
Power Consumption (W) 30 30 30 30
Power Factor (%) 64.4 64.4 97.7 67.7
SWITCH
FOR COOLING & HEATING
SW7
21
67$7(
02'(
&22/,1*
+($7,1*
&22/,1*
21/<
21
21
)DFWRU\
6HWWLQJ
OR
SETTING
COOLING ONLY
:,),
Y/G
18~20
5
OUTER DRIVER
DC MOTOR
:$7(5
/(9(/6:,7&+
+80,',7<
6(1625
7
7
2XWSXW9$&
2XWSXW9'&
2XWSXW9$& 2XWSXW9'& 2XWSXW9'&
2XWSXW9'&
2XWSXW9'&
2XWSXW9'&
2XWSXW9'&
TO PROGRAMMABLE
WIRED CONTROLLER
TO WIRED
CONTROLLER
2XWSXW9'&
'5<&217$&7
2XWSXW9'&
2XWSXW9'&
2XWSXW9'&
1
2
3
1
2
3
6
5
RED(BROWN)
WHITE
BLUE(BLACK)
&LUFXLW
%UHDNHU
Y/G
Y/G
287'22581,7
4
3
2
1
NOTE:The 1,2,3 number
on the electronic control
box should match with
the outdoor unit terminal.
2XWSXW9'&
2XWSXW9'&

DLFSOAH: Installation Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
11
CAPACITY SETTING
One-way cassette models are dual capacity and can be downsized by
adjusting the dial switch ENC1 found in the main board as shown in
Figure 14.
Table 6 — Capacity Setting
Fig. 14 — Capacity Setting
9K to 6K Setting
The default capacity of DLFSOAH09XAK is 9K BTUH, to downsize it
to a 6K model.
1. The default ENC1 setting for 9K unit is 1.
Fig. 15 — Capacity Setting
2. Disconnect the power first.
3. Open the electronic control box, change ENC1 to 0. Then close the
electronic control box
Fig. 16 — Capacity Setting
4. Connect the power again, the capacity of the unit has changed to 6K.
18K to 12K Setting
The default capacity of DLFSOAH18XAK is 18K BTUH, to downsize it
to a 12K model
1. The default ENC1 setting for 18K unit is 4.
Fig. 17 — Capacity Setting
2. Disconnect the power first.
3. Open the electronic control box, change ENC1 to 2. Then close the
electronic control box.
Fig. 18 — Capacity Setting
4. Connect the power again, the capacity of the unit has changed to 12K.
DESCRIPTION BTUH V-PH-HZ ID MODEL NO.
CASSETTE
6
208/230-1-60
DLFSOAH09XAK
9
12 DLFSOAH18XAK
18


DLFSOAH: Installation Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
12
DIP SWITCH SETTINGS
Table 7 — Dip Switch Settings
DRAIN PIPE INSTALLATION
The drainpipe is used to drain water away from the unit. Improper
installation may cause unit and property damage.
NOTE: Installation requires a PVC tube (exterior diameter = 1in
(25mm)) (depending on models), which can be obtained at
your local hardware store or dealer.
Indoor Pipe Installation
Install the drain pipe as shown in Figure 19.
Fig. 19 — Pipe Installation
NOTE: When using an extended drainpipe, tighten the indoor connection with an
additional protection tube to prevent it from pulling loose. The
drainpipe should slope downward at a gradient of at least 1/8” per foot
to prevent water from flowing back into the air conditioner. To prevent
the pipe from sagging, space hanging wires every 39-59”(1-1.5m). If the
outlet of the drainpipe is higher than the body’s pump joint, provide a
lift pipe for the exhaust outlet of the indoor unit. The lift pipe must be
installed no higher than 29.5”(75cm) from the ceiling board and the
distance between the unit and the lift pipe must be less than 11.8”
(30cm) (depending on models). Incorrect installation could cause water
to flow back into the unit and flood. To prevent air bubbles, keep the
drain hose level or slightly tilted up (3”/<75mm) (some models).
Fig. 20 — Drain pipe installation
Fig. 21 — Drain pipe installation
1. Pass the drain hose through the wall hole. Ensure the water drains to a
safe location where it will not cause water damage or a slipping hazard.
NOTE: The drain pipe outlet should be at least 1.9” (5cm) above the ground.
If the drain pipe touches the ground, the unit may become blocked
and malfunction. If you discharge the water directly into a sewer, be
sure the drain has a U or S pipe to catch odors that might otherwise
come back into the house.
NO. DIAL CODE FUNCTION ON OFF 1 ON&2 ON 1 ON&2 OFF 1 OFF&2
ON 1 OFF&2 OFF
1SW2-1
Fan speed control after compressor
stops Lowest speed [Default] Fan stop N/A N/A N/A N/A
2 SW2-2 Breezeless function Breezeless
on
[Default]
Breezeless
off
N/A N/A N/A N/A
3SW1
Indoor fan stop temperature (TEL0) for
normal anti-cold air function in the
HEATING mode
N/A N/A According to
EEROM setting 15°C 8°C [Default]24°C
4 SW6 Heating temperature compensation N/A N/A According to
EEROM setting 4°C 2°C [Default]6°C
5 S1+Rotary Switch S2 Central control address selection N/A N/A S2 + 48 S2 + 16 S2 + 32 S2
6 SW8 Settings for Twins connection Slave unit Master unit, has a slave unit Master unit, has a
slave unit [Default] Master unit, no slave unit
7 Rotary Switch ENC1 Capacity selection 6K: ENC1=0; 9K:ENC1=1; 12K: ENC1=2; 18K:ENC1=4
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 a water-level switch malfunction.
In HEAT mode, the outdoor unit discharges water. Ensure that
the drain hose is placed in an appropriate area to avoid water
damage and slippage. DO NOT pull the drainpipe forcefully,
doing so may disconnect it.
CAUTION
Drainpipe
connecting port
Drainpipe
Drain adapter
Metal clamp
Downward slope
1/100
(1-1.5m)
39-59”
≤(75c
m
29.5”
1 - 1.5m
39-59”
3”(0 - 75mm)
11.8”
≤(30cm)
≤20.8” (53cm)
8.6”(22cm)
(0-53cm)
20.8”
≥(10cm)
4”

DLFSOAH: Installation Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
13
Drill a Wall Hole
1. Use a 2.5in (65mm) or 3.5in (90mm) (depending on models) core drill to
drill a hole in the wall. Ensure that the hole is drilled at a slight downward
angle, so that the outdoor end of the hole is lower than the indoor end by
approximately 1/4” (6mm). This ensures proper water drainage.
2. Place the protective wall cuff in the hole. The cuff protects the edges of
the hole and helps seal the hole once the installation is.
Fig. 22 — Drill Hole
NOTE: When the gas side connective pipe is 5/8in (16mm) or
more, the wall hole should be 3.54in(90mm).
REFRIGERANT PIPING CONNECTION
When connecting the refrigerant piping, do not allow substances or
gases, other than the specified refrigerant, to enter the unit. The presence
of other gases or substances lower the unit’s capacity and can cause
abnormally high pressure in the refrigeration cycle which may cause an
explosion and injury.
NOTE: Ensure the refrigerant pipe length, the number of bends, and
the drop height between the indoor and outdoor units meet
the requirements listed in Table 8.
Table 8 — Maximum Length and Drop Height Based on
Models (Unit ft./m)
Fig. 23 — Oil Traps
When drilling the wall hole, be mindful to avoid wires,
plumbing, and other sensitive components.
CAUTION
Wall
Indoor
Outdoor
(5-7mm)
0.2-0.275in
CAPACITY (BTU/H) PIPING LENGTH MAXIMUM DROP
HEIGHT
06K-12K 25/82 10/32.8
18K30/98.4 20/65.6
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 20ft (6m) of the vertical suction line riser
(<36000Btu/h unit). An oil trap should be installed every
32.8ft(10m) of vertical suction line riser (36000Btu/h unit)
CAUTION
20ft/6m
32.8ft/10m
20ft/6m
32.8ft/10m

DLFSOAH: Installation Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
14
CONNECTION INSTRUCTIONS -
REFRIGERANT PIPING
Step 1 - Cut Pipes
When preparing refrigerant pipes, take extra care to cut and flare them
properly. Doing so ensures 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. Ensure the pipe is cut at a perfect 90.
Fig. 24 — Cut pipes
NOTE: DO NOT deform the pipe while cutting. Be careful not to
damage, dent, or deform the pipe while cutting. This
drastically reduces the heating efficiency of the unit.
Step 2 - Remove The Burrs
Burrs can affect the air-tight seal of the refrigerant piping connection.
They must be completely removed.
1. Hold the pipe at a downward angle to prevent burrs into the pipe.
2. Using a reamer or deburring tool, remove all burrs from the cut section
of the pipe.
Fig. 25 — Reamer
Step 3 - Flare Pipe Ends
Proper flaring is essential to achieve an airtight seal.
1. After removing burrs from the 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 the pipe. Ensure they are facing the
right direction, because they can not put on or their direction changed
after flaring.
Fig. 26 — Flare Pipe Ends
4. Remove the PVC tape from the pipe ends when ready to perform
flaring work.
5. Clamp flare form on the end of the pipe. The end of the pipe must
extend beyond the flare form.
Fig. 27 — Flare Form
6. Place the flaring tool on the form.
7. Turn the handle of the flaring tool clockwise until the pipe is fully
flared. Flare the pipe in accordance with the dimensions.
Table 9 — Piping Extension Beyond Flare Form
8. Remove the flaring tool and flare form, then inspect the end of the pipe
for cracks and even flaring.
• The branching pipe must be installed horizontally. An angle of
more than 10may cause a malfunction.
•DO NOT install the connecting pipe until both the indoor and
outdoor units have been installed.
• Insulate both the gas and liquid piping to prevent water
leakage.
CAUTION
Pipe
Gauge
Tightening
Torque
Flare Dimensions
(A) (Unit: In/mm) Flare Shape
1/4”
(6.35)
18-20 N.m
(180-200kgf.com)
0.33
/8.4
0.37
/8.7
3/8”
(9.52) 32-39 N.m (320-390kgf.cm)
0.52/
13.2
0.53/
13.5
1/2”
(12.7)
49-59 N.m
(490-590kgf.cm)
0.64/
16.2
0.65/
16.5

DLFSOAH: Installation Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
15
Step 4 - Connect The Pipes
Connect the copper pipes to the indoor unit first, then connect them to the
outdoor unit. Connect the low pressure pipe then the high pressure 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 to connect.
Fig. 28 — Align the Pipes
3. Tighten the flare nut as tight as possible by hand.
4. Use an adjustable wrench, 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 Table 9 on page 14.
NOTE: Use an adjustable wrench and a torque wrench when
connecting or disconnecting pipe to or from the unit.
Fig. 29 — Torque fittings
NOTE: Carefully bend the tubing in the middle. DO NOT bend the
tubing more than 90 degrees or more than three times.
6. After connecting the copper pipes to the indoor unit, wrap the power
cable, signal cable and the piping together with binding tape.
NOTE: DO NOT intertwine the signal cable with other wires. While
bundling these items do not intertwine or cross the signal
cable with any other wiring.
7. Thread this pipeline through the wall and connect it to the outdoor unit.
8. Insulate all the piping, including the outdoor unit valves.
9. Secure the tubing cover (supplied in Accessories box) to the indoor unit
by a screw.
Fig. 30 — ST4.8#12 Screws
10. Open the stop valves of the outdoor unit to start the refrigerant flow
between the indoor and outdoor unit.
indoor unit tubing pipe
are nut
Be sure to wrap the insulation around the piping. Direct contact
with the bare piping may result in burns or frostbite.
Ensure the pipe is properly connected. Over-tightening may
damage the bell mouth and under tightening may lead to leakage.
CAUTION
NOTE:
Two ST4.8*12
screws are supplied,
one of which
is a spare.
ST4.8*12 screw
Ensure there is no refrigerant leak after installation completion.
If a leak exists, ventilate the area immediately and evacuate the
system.
CAUTION

DLFSOAH: Installation Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
16
Step 5 - Panel Installation - Ceiling Prep
Use the following steps to prepare the ceiling.
1. Drill a 16.93”x51.18” (430 mm x 1300 mm) hole into the ceiling based
on the layout of the installation board. The center of the ceiling opening
should match the center of the body of the indoor unit.
NOTE: To prevent vibrations, reinforce the ceiling where necessary.
2. Once the ceiling is cut, remove the installation board.
Step 6 - Panel Installation
Model A
NOTE: The air grille received by the customer is not tightened by the
wire rope, however is specifically designed to be loose for
easy installation.
1. Grab air grille by hand and pull it out slowly in the direction of the
arrow.
Fig. 31 — Panel Installation
2. Pull the panel grille out of the panel, secure the cassette panel to the
one-way cassette with the two plastic straps.
Fig. 32 — Panel Installation
3. Manually rotate the louver, secure the panel to the cassette with
3×M4*22 screws and a ST3.9*16 screw.
Fig. 33 — Panel Installation
4. Open the two covers on both sides of the panel and secure the panel to
the cassette with 3× M4*22 screws.
Fig. 34 — Panel Installation
5. Connect the display board to the main control board, up to four wires
are required to connect.
Grab at these locations
Before securing the screw, open the screw cover.
After securing the screw, close the cover.
NOTE
Eight M4*22 screws are supplied,
two of which are spares.
Two ST3.9*16 screws are supplied,
one of which is a spare.
M4*22 screw
ST3.9*16 screw
M4*22 screw

DLFSOAH: Installation Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
17
NOTE: The corresponding colors or pins are connected to each other.
Fig. 35 — Panel Installation
6. Install the control box cover and turn the disconnect switch to ON, then
close the two plastic covers on both sides of the panel.
Fig. 36 — Panel Installation
7. During the test-run process, the display illuminates and the air grille
raises automatically.
Fig. 37 — Panel Installation
Model B
1. Press the circular position to open the two screw covers, then remove
the two screws.
Fig. 38 — Panel Installation
2. Hold and open the air grille, then push both latches to the middle to
unlock the air grille.
Fig. 39 — Panel Installation
3. Remove the panel grille from the panel, secure the cassette panel to the
one-way cassette with the two plastic straps.
Fig. 40 — Panel Installation
when the connection is complete,
cli
p
the wires to the stra
p
.
(white 10-core)
(white 5-core)
(red 5-core)
( 4 core)
Screw Covers
Latch
plastic strap

DLFSOAH: Installation Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
18
4. Manually rotate the louver, secure the panel to the cassette with
3×M4*22 screws and a ST3.9*16 screw.
Fig. 41 — Panel Installation
5. Open the two covers on both sides of the panel, secure the panel to the
cassette with 3× M4*22 screws.
Fig. 42 — Panel Installation
6. Connect the display board to the main control board, up to four wires
are required to make the connection.
NOTE: The corresponding colors are corresponding pins are
connected to each other.
Fig. 43 — Panel Installation
7. Install the control box cover and set the disconnect switch to ON, then
close the two plastic covers on both sides of the panel.
Fig. 44 — Panel Installation
8. Re-install the air grille by pushing the latches to lock it and secure the
two screws, then close the two screw covers.
Fig. 45 — Panel Installation
Before securing the screw, open the screw cover.
After securing the screw, close the cover.
NOTE:
Eight M4*22 screws are supplied,
two of which are spares.
Two ST3.9*16 screws are supplied,
one of which is a spare.
M4*22 screw
ST3.9*16 screw
M4*22 screw
display panel
(white 10-core)
louver
(white 5-core)
Wi
(4 core)
when the connection is complete, clip
the wires to the strap.

DLFSOAH: Installation Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
19
OPTIONAL PARTS INSTALLATION
Wi-Fi Dongle Installation
Use the following steps below to install the Wi-Fi dongle.
NOTE: If you choose this configuration, it is recommended that the
installation of the wireless dongle be performed during the
panel installation.
1. Remove the Wi-Fi dongle protective cap.
Fig. 46 — Wi-Fi Dongle Installation
2. Open the cover with the display panel, loosen the screw and remove the
cover.
Fig. 47 — Wi-Fi Dongle Installation
3. Open the front panel and insert the Wi-Fi dongle into the reserved
interface.
Fig. 48 — Wi-Fi Dongle Installation
Loosen the screw and remove the cover
infrared controller plug
5 core
This interface is only compatible with the wireless dongle (Wi-Fi
dongle) provided by the manufacturer.
WA R N I N G

DLFSOAH: Installation Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
20
ELECTRICAL CONNECTIONS
NOTE: Before performing any electrical work, read these
regulations.
1. All wiring must comply with local and national electrical codes,
regulations, and must be installed by a licensed electrician
2. All electrical connections must be made according to the Electrical
Connection Diagram located on the indoor and outdoor unit
panels.
3. It there is a serious safety issue with the power supply, stop work
immediately. Resolve the issue before proceeding with the
installation.
4. Power voltage should be 90-110% of the rated voltage. An
insufficient power supply can cause a malfunction, electrical shock
or fire.
5. If connecting power to fixed wiring, a surge protector and main
power switch should be installed.
6. If connecting power to fixed wiring, a switch or a circuit breaker
that disconnects all poles and has a contact separation of at least 1/
8in(3mm) must be incorporated in the secured wiring. The
qualified technician must use an approved circuit breaker or
switch.
7. Only connect the unit to an individual branch circuit outlet. Do not
connect another appliance to that outlet.
8. Properly ground the air conditioner.
9. Every wire must be firmly connected. Loose wiring can cause the
terminal to overheat, resulting in product malfunction and possible
fire.
10. DO NOT let the wires to touch or rest against the refrigerant
tubing, the compressor, or any moving parts within the unit.
11. To avoid an electrical shock, refrain from touching the electrical
components shortly after the power supply has been turned on.
After turning off the power, always wait at least ten minutes before
touching electrical components.
12. Ensure you do not cross electrical wiring with signal wiring. Doing
so may cause distortion and interference.
13. The unit must be connected to the main outlet. Normally the power
supply must have a impedance of 32 ohms.
14. No other equipment should be connected to the same power
circuit.
15. Connect the outdoor wires before connecting the indoor wires.
NOTE: In North America, the appliance should be wired according
to NEC and CEC requirements.
Fig. 49 — Disconnect Switch and Connective Wires
Before performing any electrical or wiring work, turn off the
main power to the system.
WA R N I N G
Disconnect Switch
Disconnect Switch