Midea DLFSDA User manual

Specifications subject to change without notice.
DLFSDA and DLFLDA
INSTALLATION INSTRUCTIONS
Ducted Style Ductless System − Sizes 09 to 58
Fig. 1 - Sizes09−48
Fig. 2 - Size 58
NOTES:
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.............................
PARTS LIST 3...........................................
SYSTEM REQUIREMENTS 4...............................
WIRING 4...............................................
DIMENSIONS 5..........................................
INSTALLATION CLEARANCES 7...........................
MAINTENANCE CLEARANCES 7..........................
INSTALLATION LOCATION REQUIREMENTS 8..............
INDOOR UNIT INSTALLATION 8...........................
EXTERNAL STATIC PRESSURE 12.........................
FAN PERFORMANCES AT VARYING STATIC PRESSURES 13....
ELECTRICAL DATA 21...................................
CONNECTION DIAGRAMS 21.............................
START−UP 24............................................
TROUBLESHOOTING 25..................................

232801000302
Specifications subject to change without notice.
SAFETY CONSIDERATIONS
Installing,starting up, and servicing air−conditioning equipment can be
hazardous due to system pressures, electrical components, and
equipment location (roofs, elevated structures, etc.).
Only trained, qualified installers and service mechanics should install,
start−up, and service this equipment.
Untrained personnel can perform basic maintenance functions such as
cleaning coils. All other operations should be performed by trained
servicepersonnel.
When working on the equipment, observe precautions in the literature
and on tags, stickers, and labels attached to the equipment.
Follow all safety codes. Wear safety glasses and work gloves. Keep
quenching cloth and fire extinguisher nearby when brazing. Use care in
handling, rigging, and setting bulky equipment.
Read these instructions thoroughly and follow all warnings or cautions
included in literature and attached to the unit. Consult local building
codes and National Electrical Code (NEC) for special requirements.
Recognize safety information.
This is the safety−alert symbol . When you see this symbol on the unit
and in instructions or manuals, be alert to the potential for personal
injury. Understand these signal words: DANGER, WARNING, 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.
WARNING
The 9 and 12K units are for single room application only.
!WARNING
!WARNING
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.
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.
!WARNING
CAUTION
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
compressorat start−up.
!CAUTION

32801000302 3
Specifications subject to change without notice.
PARTS LIST
Table 1—Parts List
PART NAME
INDOOR UNIT
DRAIN ADAPTER
AIR FILTER
WIRED CONTROLLER
WIRELESS REMOTE
LITERATURE PACKAGE INCLUDING
INSTALLATION INSTRUCTIONS AND
WARRANTY
CONDENSATE LIFT PUMP
(EXTERNAL SIZES 09-18, INTERNAL
SIZES 24-58)
Air outlet
Air inlet
Air filter
Drain hose(field supplied)
Electric control cabinet
Refrigerant connecting pipe
(field supplied)
ON/
OFF
TEMP
FP
TIMER
ON
TIMER
OFF
MODE
FAN/SLC
SLEEP SWING
DIRECT
TURBO CLEANLED
FOLLOW
Fig. 3 - Parts List
NOTE: Images are for illustration purposes only.
Notes:
- If the outdoor unit is higher than the indoor unit, prevent rain from flowing into the indoor unit along the connection pipe by creating a downward arc 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.
- The illustration above is only a sketch. Different models may be slightly different.
- Filter Standard on units produced after serial number 2815V10001
Table 2 lists the units covered in these installation instructions.
Table 2—Indoor Units
kBTUh V-Ph-Hz ID Model No.
9
208/230-1-60
40MBDQ09---3
12 40MBDQ12---3
18 40MBDQ18---3
24 40MBDQ24---3
36 40MBDQ36---3
48 40MBDQ48---3
58 40MBDQ58---3

432801000302
Specifications subject to change without notice.
SYSTEM REQUIREMENTS
Allow sufficient space for airflow and servicing unit. See Fig. 6 for minimum required distances between the unit and the walls or ceilings.
Piping
IMPORTANT: Both refrigerant lines must be insulated separately.
SMinimum refrigerant line length between the indoor and outdoor units is 10 ft. (3 m).
STable 3 lists the pipe sizes for the indoor unit. Refer to the outdoor unit installation instructions for other allowed piping lengths and refrigerant
information.
Table 3—Piping Lengths
9K12K 18K 24K 36K 48K 58K
Gas Pipe (size-connection type) In.
(mm)
3/8
(9.52)
1/2
(12.7)
1/2
(12.7)
5/8
(16)
5/8
(16)
5/8
(16)
3/4
(19)
Liquid Pipe (size-connection type) In
(mm)
1/4
(6.35)
1/4
(6.35)
1/4
(6.35)
3/8
(9.52)
3/8
(9.52))
3/8
(9.52)
3/8
(9.52)
WIRING
All wires must be sized per NEC (National Electrical Code) or CEC
(Canadian Electrical Code) and local codes. Use Electrical Data table
MCA (minimum circuit amps) and MOCP (maximum over current
protection) to correctly size the wires and the disconnect fuse or
breakersrespectively.
Sizes 09−24 Recommended Connection Method for
Power and Communication Wiring
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.
To minimize communication interference: If installed in a high
Electromagnetic field (EMF) area and communication issues exist, a
14/2 stranded shielded wire can be used to replace L2 and (S) between
outdoor unit and indoor unit − landing the shield onto ground in the
outdoor unit only.
Sizes 36−58 Recommended Connection Method for
Power and Communication Wiring
Power and Communication Wiring:
The main power is supplied to the outdoor unit. The field supplied
power wiring from the outdoor unit to the indoor unit consists of three
(3) wires and provides the power for the indoor unit. Two wires are
high voltage AC power and one is a ground wire. To minimize voltage
drop, the factory recommended wire size is 14/2 stranded with a
ground.
Communication Wiring:
A separate shielded stranded copper conductor only, with a 600 volt
rating and double insulated copper wire, must be used as the
communication wire from the outdoor unit to the indoor unit. Please
use a separate shielded 16GA stranded control wire.
!
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.
CAUTION
CAUTION
!
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

32801000302 5
Specifications subject to change without notice.
DIMENSIONS
Air filter Air inlet from rear side
Air inlet from bottom side
Air filter
Test mouth & Test cover
0.98in (25mm) Drain
connecting pipe (for lift pump)
Gas connection
Liquid connection
4-install hanger
Outside air intake Electric control box
0.98in (25mm)
Drain pipe
Airow
Airow
Fig. 4 - Indoor Unit Sizes 09K−48K
Table 4—Indoor Unit
OUTLINE
DIMENSIONS
AIR OUTLET
OPENING SIZE
AIR RETURN
OPENING SIZE
HANGER
BRACKERS
REFRIGERANT
PIPE LOCATIONS
OPERATING
WEIGHT
lb (kg)
Size Unit A B C D E F G H I J K L M H1 H2 W1 W2
9
In. 27.6 7.9 19.9 17.7 5.4 21.1 1.2 623.6 7.3 229.2 14.2 3.3 5.5 3.3 3.3 40
mm 700 200 506 450 137 537 30 152 599 186 50 741 360 84 140 84 84 18.1
12
In. 27.6 7.9 19.9 17.7 5.4 21.1 1.2 623.6 7.3 229.2 14.2 3.3 5.5 3.3 3.3 40
mm 700 200 506 450 137 537 30 152 599 186 50 741 360 84 140 84 84 18.1
18
In. 34.65 8.27 26.54 23.62 5.51 27.80 1.97 5.35 30.79 7.48 1.57 36.22 20 3.07 5.83 3.46 4.41 54
mm 880 210 674 600 140 706 50 136 782 190 40 920 508 78 148 88 112 24.5
24
In. 43.31 9.8 30.47 27.56 5.51 36.46 1.97 6.89 39.41 8.98 0.2 44.88 23.54 3.15 5.91 5.12 6.1 87
mm 1100 249 774 700 140 926 50 175 1001 228 51140 598 80 150 130 155 39.4
36
In. 53.54 9.8 30.47 27.56 5.51 46.69 1.97 6.89 49.65 8.98 0.2 55.12 23.54 3.15 5.91 5.12 6.1 106
mm 1360 249 774 700 140 1186 50 175 1261 228 51400 598 80 150 130 155 48.3
48
In. 47.24 11.81 34.41 31.5 4.84 41.1 1.97 8.94 43.35 11.02 0.2 48.82 27.44 3.15 5.91 7.28 8.27 120
mm 1200 300 874 800 123 1044 50 227 1101 280 51240 697 80 150 185 210 54.3
58
In. 55.12 17.32 33.78 30.31 4.17 46.81 1.1 15.16 46.54 11.02 1.57 56.57 27.56 8.15 10.75 5.67 5.67 163
mm 1400 440 858 770 106 1189 28 385 1182 280 40 1437 700 207 273 144 144 74

632801000302
Specifications subject to change without notice.
DIMENSIONS − (CONT)
Airow
Airow
Fig. 5 - Indoor Unit Sizes 58K

32801000302 7
Specifications subject to change without notice.
INSTALLATION CLEARANCES
Maintenance space
Left
side
Right
side
Strong and durable ceiling
Indoor unit
)mc03(ni8.11>)mc01(ni4>
>0.8in(2cm)
> 0.8in(2cm)
> 11.8in(30cm)
(ni
2.
8
>)mc052
Floor
Service access Ceiling
)gn
i
l
iecon
ne
h
W(
Ceiling opening size
Access Panel Ceiling opening size
Fig. 6 - InstallationClearances
MAINTENANCE CLEARANCES
>11.8in（30cm）
Service access
Service access
Unit
Width of the Unit
Coil Connection Area
Condensate Drain Piping Area
Condensate Pump Service Clearance
Sensor Service Clearance
B
Depth of unit
Access Panel
17.7 in (45cm) x 17.7 in (45cm)
7.8 in (20cm)
>11.81 in (30cm)
>4 in (10cm)
Bottom Return
Blower/Motor Service Clearance
Filter Service Clearance
Blower/Motor Service Clearance
PCB Board Service Clearance
Fig. 7 - MaintenanceClearances
Table 5—Maintenance Clearances
Capacity (Kbtu) B
9K 11.81in.(30cm)
12K 11.81in.(30cm)
18K 11.81in.(30cm)
24K 11.81in.(30cm)
36K 11.81in.(30cm)
48K 15.75in.(40cm)
58K 15.75in.(40cm)
NOTE: If installed above a hard lid ceiling, utilize a ceiling access panel the length and width of the unit, otherwise the blower components and/or
entire unit cannot be removed.
If a single access panel is desired, the minimum dimensions should be:
SWidth: The width of the unit plus 2−inches on both sides
SLength: The length of the unit plus 18−inches on the connection end and 2−inches on the opposite end

832801000302
Specifications subject to change without notice.
INSTALLATION LOCATION REQUIREMENTS
Indoor Unit
SConfirm that the ceiling is able to support the weight of the unit.
SThere should be enough room within the false ceiling for installation
and maintenance.
SThe false ceiling should be horizontal and leveled.
SInstall the unit in a location within the room that allows uniform air
flow in all directions.
SDo not install the indoor units near a direct source of heat such as
direct sunlight or a heating appliance.
SA location which provides appropriate clearances.
SEnsure the hanger is strong enough to withstand the unit’s weight.
Indoor and Outdoor Units (General)
SEnsure space is left for access for maintenance.
SLocation should be far away from where there is a heat source,
leakage of any inflammable, explosive substances, or smog.
SAll wiring and refrigerant lines must be at least 3 ft. (1m) away from
sources of electromagnetic interference (televisions, radios, etc.).
Interference is still possible even if this distance is maintained.
SDo not install the indoor or outdoor units in a location with special
environmental conditions. For those applications, contact your
Ductless representative.
INDOOR UNIT INSTALLATION
INDOOR DUCTED UNIT INSTALLATION
!
Be sure that the ceiling grid is supported separately from
the unit.
The ceiling grid must not be supported by any part of the
unit or any associated wiring or piping work.
CAUTION
MOUNTING THE UNIT
1. INSTALLING HANGER BOLTS − Install the hanger bolts at
the locations (see Fig. 8, top view). Use a Ø0.39in. /(10mm)
all−threaded rod.
Fig. 8 - Install the Hanger Bolts
2. The unit can now be lifted on to the hanging rods for
mounting.
3. Use rods and fasteners to suspend the unit at the factory
provided mounting holes.
4. Adjust the unit’s height until the bottom is level with the false
ceiling, with adequate space to provide enough pitch for the drain.
5. Secure the unit in position with lock nuts and washers on both
sides of the mounting bracket. Ensure the threaded rod does not
extend more than 2 in. below the mounting brackets (see Fig.
9).
A150665
Fig. 9 - Secure the Unit
RETURN AIR ARRANGEMENT (ONLY SIZES 09−48)
Based on the return air arrangement requirement in the field, the unit
can be modified from the rear return to the bottom return.
1. Remove the return Air Return Flange/filter rack and plenum
bottom panel.
Air return ange
Ventilation panel
Fig. 10 - Remove the Return Air Return Flange
2. Install the Seal Sponge on the bottom inlet.
3. Swap the position to change the rear return to bottom return
arrangementinstalling the Air Return flange and the filters.
Air return ange
Ventilation panel
Fig. 11 - Change the Rear Return
4. Install the filter brackets to lock the filter in place.
Fig. 12 - Installthe Filter Brackets

32801000302 9
Specifications subject to change without notice.
INSTALLING DUCTWORK
Connect the return and supply ducts to the duct collars provided on the
unit. Adequate distance between the return and supply diffusers should be
maintained to avoid short circulation of air within the space.
The filter is located on the return side of the unit, on the rear or bottom
depending on the return air inlet arrangement.
A150671
Fig. 13 - InstallingDuct
OUTSIDE AIR CONNECTION
If necessary, an outside air connection knockout is located on the side of
the unit downstream of the air filter. It is recommended to field supply and
field install a booster fan on the duct work used for outside air. A booster
fan may be powered by the connection on the PCB board CN43. The
maximum input for the motor is 200W. The output of the NEW FAN will
be active while the indoor fan is active.
NOTE: The amount of outside air is dependent on different factors as
the booster fan, outside air duct work type and length, static pressure,
conditions, etc..
Ø4.92” (125mm) Ø6.3”(160mm)
Fig. 14 - Outside Air Connection
CONDENSATE PIPE INSTALLATION
The unit is supplied with a 1 1/4−in. OD drain connection to connect
copper or PVC drain piping. When installing condensate piping, follow
these recommendations:
SInstall drains to meet local sanitation codes.
SThe Ducted Style Indoor unit is supplied with a condensate lift pump
that is capable of lifting water 29.5in. (750mm).
SThe highest point in the condensate piping should be as close to the
unit as possible (see Fig. 17).
SCondensate piping should slope downward in the direction of
condensate flow, with a minimum gradient of 1/100.
SWhen multiple units are connected to a common condensate drain,
ensure the drain is large enough to accommodate the volume of
condensate from all units. It is also recommended to have an air vent
in the condensate piping to prevent air lock.
SCondensate piping must not be installed where it may be exposed to
freezing temperatures.
STo prevent the pipe from sagging, space hanging wires every
39−59in. (1−1.5m).
SIf 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 21.7in. (55cm) from the ceiling
board. The distance between the unit and the lift pipe must be less
than 7.9in (20cm). Incorrect installation could cause water to flow
back into the unit and flood.
STo prevent air bubbles, keep the drain hose level or slightly tiled up
<3in. (75mm).
1. Cover the drain hose with heat insulation to prevent
condensation and leakage.
2. Attach the mouth of the drain hose to the unit’s outlet pipe.
Sheath the mouth of the hose and clip it firmly with a pipe clasp
(see Fig. 15).
Drainpipe
connecting port
Drain hose
Pipe clasp Insulation
Fig. 15 - Indoor Drainpipe Installation
Fig. 16 - Condensate piping without a pump
(39-59”)
(7.9”)
<20cm
)
”7.1
2
(
m
c5
5
<
Lean over 1/50
1-1.5m
Ceiling
0 - 75mm
(3”)
Fig. 17 - Condensate piping with a pump
When connecting multiple drainpipes, install the pipes as illustrated on
Fig. 18.
0-53cm
(20.8”)
≥10cm
(4”)
Fig. 18 - Connecting Multiple Drain Pipes

10 32801000302
Specifications subject to change without notice.
CONDENSATE DRAIN AND CONDENSATE LIFT
PUMP INSTALLATION (HORIZONTAL
INSTALLATION)
For sizes 9, 12 and 18, the condensate lift pump has been provided in a
separate box. Use the following steps to install the External Condensate
Lift pump for a Horizontal Installation of the indoor unit.
NOTE: Drain connections A, B and C are covered with caps.
(1.) For sizes 09 and 12
a. Remove the cap on the drainage outlet.
b. Cut both ends of the rubber tubing provided into a straight one.
c. Connect the drainage outlet and condensate lift pump using the
rubber tubing and secure it with clamps on both ends, as shown
on Figure 19.
d. Plug the power cable of the external pump to CN13 / “PUMP”
pin and plug the water level sensor cable to the CN5 / ”WATER”
to enable the pump (see Fig. 23).
(2.) For size 18
a. Remove the cap on drain connector B.
b. Connect the drain connector B and the condensate lift pump using
the L rubber hose and secure it with clamps on both ends.
c. Connect the drainpipe to the connector D (see Fig. 20).
d. Plug the power cable of the external pump to CN13 / “PUMP”
pin and plug the water level sensor cable to the CN5 / “WATER”
to enable the pump (see Fig. 23).
Fig. 19 - Condensate lift pump installation sizes 09−12
Connector A
Connector B
Connector C
Connector D
Hose
Fig. 20 - Condensate lift pump installation size 18
(3.) Sizes 24, 36, 48 and 58 have a built−in condensate lift pump. The
drain connections (A, B and C) are covered with caps.
a. Connect the drainpipe to connector D (see Fig. 21).
Connector A
Connector B Connector C
Connector D
Fig. 21 - Connection of drain pipe to condensate lift pump sizes
24−58
VERTICAL INSTALLATION
Disable the Condensate Lift Pump
The pump must be disabled while the unit is installed vertically (up
flow) or the lift pump assembly is removed from its original position:
SOpen the cover of the E−Parts Box assembly, unplug the “PUMP” pin
to disable the pump function, and short connect the “CN5” plug to
disable the water level sensor (see Fig. 22 and Fig. 23).
Remove
the cover
Short connect the “CN5”
Unplug the “PUMP” plug pin
Fig. 22 - Unplug the PUMP Pin
Fig. 23 - Condensate Lift Pump Connectors