Installation Manual
Ductless Multi Zone with Highwall Indoor Unit
Design may vary by model number.
TABLE OF CONTENTS
IMPORTANT SAFETY INFORMATION .................................................................................4
INSTALLATION INSTRUCTIONS ......................................................................................6
Step 1 ...........................................................................................................9
Step 2 ..........................................................................................................11
Step 3 ..........................................................................................................13
Step 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
LIMITED WARRANTY .............................................................................................. 18
OPERATING RANGE
The following information lists the operating range specific to each model.
TAD2U18MOU / TAD3U24MOU / TAD4U36MOU
Cooling: 14F -115F Heating: 5F-75F
ENGLISH
NOTES:
• When the outdoor temperature drops below -22°F
(-30°C), the unit will stop running. The unit will turn back
on automatically when the temperature rises above the
lowest limit.
• It is recommended to have a secondary heating source(s)
available in case the temperature drops below the
operating range.
RECORD KEEPING
Thank you for purchasing this Haier product. This installation manual
will help you get the best performance from your new heat pump.
For future reference, record the model and serial number located on
the label on the side of your air conditioner/heat pump, and the date
of purchase.
Staple your proof of purchase to this manual to aid in obtaining
warranty service if needed.
_______________________________________
Model number
_______________________________________
Serial number
_______________________________________
Date of purchase
31-5000001 Rev. 1
3
ENGLISH
IMPORTANT SAFETY INFORMATION
WARNING
electric shock, or personal injury.
• Use this equipment only for its intended purpose as
described in this manual.
• This heat pump must be properly installed in accordance
with these instructions before it is used.
• All wiring should be rated for the amperage value listed
on the rating plate. Use only copper wiring.
• All electrical work must be completed by a qualified
electrician and completed in accordance with local and
national building codes.
• Any servicing must be performed by a qualified
individual.
WARNING
• An adequate ground is essential before connecting the
power supply.
• Disconnect all connected electric power supplies before
servicing.
For your safety, the information in this manual must be followed to minimize the risk of fire,
RISK OF ELECTRIC SHOCK. Could cause injury or death.
For any service which requires entry into the
refrigerant sealed system, Federal regulations
require that the work is performed by a technician
having a Class II or Universal certification.
• All air conditioners contain refrigerants, which under
federal law must be removed prior to product disposal.
If you are getting rid of an old product with refrigerants,
check with the company handling disposal.
• These R-410A heat pumps systems require that
contractors and technicians use tools, equipment and
safety standards approved for use with this refrigerant.
DO NOT use equipment certified for R22 refrigerant
only.
• Repair or replace immediately all electrical wiring that
has become frayed or otherwise damaged. Do not use
wiring that shows cracks or abrasion damage along its
length or at either end.
WARNING
•
Do not store or use combustible materials, gasoline or other flammable vapors or liquids in the vicinity of this or any
other appliance.
RISK OF FIRE. Could cause injury or death.
WARNING
This appliance is not intended for use by persons
(including children) with reduced physical,Sensory or
mental capabilities, or lack of experience and knowledge,
unless they have been given supervision or instruction
concerning use of the appliance by a person responsible
for their safety. Children should be supervised to ensure
that they do not play with the appliance.
To avoid danger of suffocation, keep the plastic bag or
thin film used as the packaging material away from young
children.
Be careful that foreign matter (oil, water, etc.) does not
enter the piping than with refrigerant models. Also, when
storing the piping, securely seal the openings by pinching,
taping, etc.
For installation purposes, be sure to use the parts
supplied by the manufacturer or other prescribed parts.
The use of non-prescribed parts can cause serious
accidents such as the unit falling, water leakage, electric
shock, or fire.
The rated voltage of this product is 208/230 V A.C. 60 Hz.
Before turning on verify that the voltage is within the 187
V to 264 V range.
Always use a special branch circuit and install a special
receptacle to supply power to the air conditioner.
Use a special branch circuit breaker and receptacle
matched to the capacity of the air conditioner. (Install in
accordance with standard.)
Do not extend the power cord.
Perform wiring work in accordance with standards so that
the air conditioner can be operated safely and positively.
Install a leakage special branch circuit breaker in
accordance with the related laws and regulations and
electric company standards.
4
31-5000001 Rev. 1
CAUTION
CAUTION
IMPORTANT SAFETY INFORMATION
Use pipes that have clean external and intermal sides
It is highly recommended that you do not open or close
the stop valves when the outdoor temperature is below
-5°F (-21°C) as this may cause refrigerant leakage.
After a long period of disuse in an environment 32 °F (0° C)
or lower, supply power to the unit at least 12 hours before
re-starting the unit.
Do not touch the fins of the heat exchanger. Touching the
heat exchanger fins could result in damage to the fins or
personal injury such as skin rupture.
The power source capacity must be the sum of the air
conditioner current and the current of other electrical
appliances. When the current contracted capacity is
insufficient, change the contracted capacity.
When the voltage is low and it is difficult to start the air
conditioner, contact the power company to have the
voltage raised.
Be sure to install a breaker of the specified capacity.
Regulation of cables and breaker differs from each
locality, refer in accordance with local rules.
Do not use existing pipes.
without any contamination which may cause trouble
during use, such an sulphur, oxide, dust, cutting waste,
oil, or water.
It is necessary to use seamless copper pipes. Material:
Phosphor deoxidized seamless copper pipes. It is
desirable that the amount of residual oil is less than 40
mg/10 m.
Do not use copper pipes that have a collapsed, deformed,
or discolored portion (especially on the interior surface).
Otherwise, the expansion valve or capillary tube may
become blocked with contaminants.
Improper pipe selection will dearade performance. As an
air conditioner using R410A incurs pressure higher than
when using conventional refrigerant, it is necessary to
choose adequate materials.
To prevent breaking of the pipe, avoid sharp bends. Bend
the pipe with a radius of curvature of 4 in. (100 mm ) or
more.
If the pipe is bent repeatedly at the same place, it will
break.
ENGLISH
READ AND SAVE THESE INSTRUCTIONS
FOR MORE HELP, VISIT HAIERAPPLIANCES.COM OR CALL THE CONSUMER HELP LINE AT 877-337-3639.
BEFORE YOU BEGIN
Read these instructions completely and carefully.
• IMPORTANT – Save these instructions
for local inspector’s use.
• IMPORTANT – Observe all governing
codes and ordinances.
• Note to installer – Be sure to leave these instructions
with the Consumer.
• Note to consumer – Keep these instructions for
future reference.
• Skill level – A licensed certified technician (to handle
refrigerant R-410A, recovery, etc) and a qualified
electrician are required for installation and service of
this split heat pump system.
• Proper installation is the responsibility of the
installer.
• Product failure due to improper installation is not
covered under the limited warranty.
• For personal safety, this system must be properly
grounded.
• Protective devices (fuses or circuit breakers)
acceptable for installation are specified on the
nameplate of each unit.
• Make sure to avoid wiring or plumbing inside the wall
when installing.
• Aluminum building wiring may present special
problems - consult a qualified electrician.
• When the unit is in the STOP position, there is still
voltage to the electrical controls.
31-5000001 Rev. 1
5
ENGLISH
INSTALLATION INSTRUCTIONS
Required Tools for Installation
• 14/4 AWG stranded wire
• 5/8” (16mm), 7/8” (22mm), 1” (25mm) or Adjustable
Wrench
• R-410A Refrigerant*
• Adhesive tape*
• Conduit cable clamp 1/2”*
• Copper line set (for size, see table on page 15)
• #2 phillips screwdriver
• Drill
• R-410A flaring tool
• Hex wrench
• Hole saw 2 1/4”
• Insulation*
• Refrigerant scale
• Level
• Manifold gauge set
• Measuring tape
• Micron gauge
• Mini-split adapter (5/16”F to 1/4”M)
• Nitrogen*
• Pipe cutter
• PVC pipe
• Razor knife
• Reamer
• Saddle clamp (L.S.) w/ screws
• Sealant, non-expanding (for lineset hole)
• Soap/water solution* or gas leakage detector
• Stud finder
• Torque wrench
• Vacuum pump
• Wire strippers
• All usual and customary HVAC hand and power tools,
meters, and testing devices
* consumable
6
31-5000001 Rev. 1
INSTALLATION INSTRUCTIONS
COMPATIBILITY MATRIX FOR MULTI ZONE DUCTLESS SYSYTEM
FlexFit Mult
Outdoor Indoor
Model Rated
TAD2U18MOU
TAD3U24MOU
( * ) For 3U24EH2VHA, please follow these combinations.
Capacity
(BTUh)
18K
24K
No. of
Zones
TWO
TWO
THREE
Total
Indoor
Capacity
Unit B Unit A
14K 7K 7K
16K 9K 7K
19K 12K 7K
18K 9K 9K
21K 12K 9K
24K 12K 12K
Unit C Unit B Unit A
*14K 7K 7K --*16K 9K 7K --*19K 12K 7K --*25K 18K 7K --*18K 9K 9K --*21K 12K 9K --*27K 18K 9K --*24K 12K 12K --*30K 18K 12K --*21K 7K 7K 7K
*23K 9K 7K 7K
*26K 12K 7K 7K
32K 18K 7K 7K
*25K 9K 9K 7K
*28K 12K 9K 7K
31K 12K 12K 7K
*27K 9K 9K 9K
*30K 12K 9K 9K
33K 12K 12K 9K
TAD4U36MOU
FlexFit Mult (table continued)
TWO
THREE
36K
FOUR
ENGLISH
Unit D Unit C Unit B Unit A
31K 24K 7K --- --27K 18K 9K --- --33K 24K 9K --- --30K 18K 12K --- --36K 24K 12K --- --36K 18K 18K --- --42K 18K 24K --- --48K 24K 24K --- --32K 18K 7K 7K --38K 24K 7K 7K --28K 12K 9K 7K --34K 18K 9K 7K --40K 24K 9K 7K --31K 12K 12K 7K --37K 18K 12K 7K --43K 24K 12K 7K --27K 9K 9K 9K --30K 12K 9K 9K --36K 18K 9K 9K --42K 24K 9K 9K --33K 12K 12K 9K --39K 18K 12K 9K --45K 24K 12K 9K --36K 12K 12K 12K --42K 18K 12K 12K --48K 24K 12K 12K --48K 18K 18K 12K --28K 7K 7K 7K 7K
30K 9K 7K 7K 7K
33K 12K 7K 7K 7K
39K 18K 7K 7K 7K
45K 24K 7K 7K 7K
32K 9K 9K 7K 7K
35K 12K 9K 7K 7K
41K 18K 9K 7K 7K
47K 24K 9K 7K 7K
38K 12K 12K 7K 7K
44K 18K 12K 7K 7K
34K 9K 9K 9K 7K
37K 12K 9K 9K 7K
43K 18K 9K 9K 7K
40K 12K 12K 9K 7K
43K 12K 12K 12K 7K
36K 9K 9K 9K 9K
39K 12K 9K 9K 9K
42K 12K 12K 9K 9K
48K 18K 12K 9K 9K
45K 12K 12K 12K 9K
48K 12K 12K 12K 12K
31-5000001 Rev. 1
7
ENGLISH
Sea
Protection walls
INSTALLATION INSTRUCTIONS
INDOOR CLEARANCES
(Appearance may vary)
This picture is for reference only. Your product may look different.
More than 4 inches
More than 4 inches
Wrap the insulation pipe with
the �nishing tape from the
bottom to top.
Cut thermal insulation pipe to an
appropriate length and wrap it with
tape, making sure that no gap is left in
the insulation pipe’s cut line.
Arrangement of
piping directions
Rear left
Left
Below
Condensate piping
must have a
downward slope of at
least 1/4" per foot for
proper drainage.
Rear right
Right
SALTWATER COAST INSTALL
• The outdoor unit should be installed at least ½ mile away from the salt water, including seacoasts and inland
waterways. If the unit installed from ½ mile to 5 miles away from the salt water, including seacoasts and inland
waterways, please follow the installation instruction below.
• Install the outdoor unit in a place (such as near buildings etc.) where it can be protected from sea breeze which
can damage the outdoor unit.
ODU
Sea breeze
Sea
ODU
• If you cannot avoid installing the outdoor unit by the seashore, construct a protection wall around it to block the
sea breeze.
• A protection wall should be constructed with a solid material to block the
sea breeze. The height and the width of the wall should be 1.5 times larger
than the size of the outdoor unit. Also, allow at least 28” (700mm) between
the protection wall and the outdoor unit for air circulation to ventilate.
• Install the outdoor unit in a place where water can drain.
• If the above conditions cannot be met, contact for assistance.
Sea breeze
ODU
Sea
ODU
Sea breeze
ODU
8
31-5000001 Rev. 1
INSTALLATION INSTRUCTIONS
Step 1 - Preparation
Outdoor Unit Clearances
NOTE: If there is danger that the unit will fall or turn over,
fix the unit by inserting bolts, wire or other foundation
options.
NOTE: Place the unit on a level mounting base (or a plastic
pedestal) for proper drainage.
(3) Installation and maintenance space
Selection of installation location of outdoor
ENGLISH
NOTE: Install the outdoor unit in a level position. Failure
to do so may result in water leakage or accumulation.
8
Select the Outdoor location:
• Choose a level place solid enough to bear the weight and
vibration of the OD unit and where the operation noise will
not be amplified.
• Choose a location where the hot air discharge and/or noise
will not create a nuisance for neighbors.
• Ensure there is sufficient space to maneuver the OD unit
into place.
• Ensure there is sufficient space and no obstructions for the
air inlet and outlet.
31-5000001 Rev. 1
• I nstall the unit’s power/communication wiring at least
10 feet away from television and radio sets to prevent
interference.
• Ensure any moisture sensitive items are kept away from the
condensate drain path of the OD unit.
• Choose a location not affected by heavy snowfall or wind.
• To prevent wind exposure, install a wind baffle.
9
ENGLISH
INSTALLATION INSTRUCTIONS
Step 1 - Preparation Cont.
NOTES:
• OD unit cannot hang from a ceiling or be stacked.
• If installing the OD unit with a fence or rail guard around it,
ensure that accumulated snow, debris, etc… will not block
the air inlet or the coil exchanger.
• Ensure ventilation in case of refrigerant leakage. R-410A is
a safe, nontoxic, and nonflammable refrigerant.
• Avoid installing the OD unit where corrosive gases, such as
sulfur oxides, ammonia, and sulfurous gas are produced. If
unavoidable, consult with an installation specialist about
using a corrosion-proof or anti-rust additive to protect the
unit coils.
• Do not install the outdoor unit near the edge of a balcony.
Otherwise, children may climb onto the outdoor unit and fall
off of the balcony.
• Do not install the outdoor unit in thw following areas: Area
filled with mineral oil or containing a large amout of splashed
oil or steam, such as a kitchen. It will deterorate plastic
partic parts, causing the parts to fail or the unit to leak
water.
• Area that can cause combustible gas to ledk, contains
suspended carbon fibers or flammable dust, or volatile
inflammables such as pain thinner or gasoline. If gas leaks
and settles around the unit, it can cause a fire.
• Area where small animals may live. It may cause failure,
smoke or fire if small animals enter and touch inernal
electrical parts.
• Area where animals may urinate on the unit or ammonia
may be generated.
• If the outdoor unit must be installed in an area within easy
reach of the general public,Install as necessary a protective
fence or the like to prevent their access.
• If the outdoor unit is installed in a cold region that is
affected by snow accumulation, snow fall, or freezing, take
appropriate measures to protect it from those elements. To
ensure a stable operating, install inlet and outlet ducts.
• Make sure the outdoor unit is installed level and is stable.
Install snow protection hood as necessary.
• Avoid salty places such as the seaside for installation where
air conditioner trouble is liable to occur.
• Install the outdoor unit in a location that is away from
exhaust or the vent ports that discharge vapor, soot, dust,
or debris.
• Install the unit where it will not be tilted by more than 3°.
However, do not install the unit with it tilted towards the
side containing the compressor.
• When installing the outdoor unit where it may exposed to
strong wind, fasten it securely.
• It is recommended that unit be installed under a canopy or
elevated on a high stand.
• In places where the outdoor temperature drops to 32°F
(0°C) or lower, the drain water may freeze and may stop up
the drain or cause other outdoor unit trouble. Therefore
take measures so that the drain water will not freeze and
clog the drain.
• Please set up the outdoor unit in a high place and pleade
do not arrange the frame of installed stand under the
drain port, because the water dropped from the drain port
repeats freezing and accumulating, and may block the drain
port.
• Do not use mineral oil on a flaredf part. Precent mineral
oil from getting into the syetem as this would reduce the
lifetiome of the units.
• While welding the pipes, be sure to blow dry nitrogen gas
through them.
• The maximum lengths of this product are shown in the
table. If the units are further apart than this , correct
operation cannot be guaranteed.
Step 2 - Installation of the Indoor Unit
A. Select the Indoor location:
• Do not allow any heat or steam near the unit.
• Select a location where there are no obstacles in
front of the unit.
• Make sure that condensate drainage can be
conveniently routed away.
• Do not install near a doorway.
• Ensure that the space around the left and right of
the unit is more than 4”. The unit should be installed
as high on the wall as possible but allow a minimum
of 4” from the ceiling.
• Use a stud finder to locate and mark stud locations
for mounting and to prevent unnecessary damage
to the wall.
• Install in a location that is strong enough to
withstand the full weight and vibration of the unit.
• Leave enough space to allow access for routine
maintenance.
• Select a location that gives easy access to removing
and cleaning air filters.
• Install in a location that is 3 ft. or more away from
other electrical appliances, such as televisions and
audio devices.
10
B. Install the Mounting Plate
• Remove plastic bag, tape, and mounting plate from
the back of the indoor unit.
• Place the mounting plate on the wall in the desired
location taking into account the minimum clearances
necessary for proper operation.
• Using a level, verify that the mounting plate is
horizontal and mark the screw locations.
• Attach the mounting plate to the wall with the
supplied screws.
• If not able to align all screw holes with studs, wall
anchors are supplied.
• Be sure that the mounting plate has been attached
firmly and that applied weight is evenly distributed
by each screw. (At least one screw in wall stud,
others can use wall anchors.)
• The piping for the indoor unit may be routed to and
from the unit in one of several directions: left, left
rear, right, right rear, or right below. See Illustration
on page 7.
31-5000001 Rev. 1
Outdoor unit
Power Wiring
3
2
1
)
(N)
(L
)
(
C
2
1
)
(
N
)
(
L
Indoor unit
Control Wiring
4 Wire - 14 AWG
Stranded
1
2
3
=White
=Black
=Red
=Green
Sugested Colors
Strain Relief
Brackets
INSTALLATION INSTRUCTIONS
Step 2 - Installation of the Indoor Unit (Cont.)
C. Install the Tubing
• Always use new clean copper tubing. Never reuse
tubing if replacing an existing system.
• Measure and mark the location where the piping hole
is to be drilled.
• If pipe location will be on the left side of the unit,
follow these steps to move the drain pipe.
1. Remove the stopper in the left drain hole and
knockout the molded plug inside the port.
2. Transfer the corrugate drain hose from the right side
to the left side.
3. Insert stopper into right side drain port. Using soap
as a lubricant and a small screwdriver will allow for
easier seating of the stopper.
• Drill the lineset hole using a 2 1/4” hole saw. Angle
the drill with a downward pitch to the outside wall so
that the outside wall hole will be at least a ¼” lower
than the inside hole. This allows for proper drainage
of condensate.
• Install the lineset hole flange at the hole opening on
the inside wall.
NOTE: The flange is prescored. It may be necessary
to modify the flange to fit properly behind the wall unit
housing.
D. Electrical Connections for the Indoor Unit
NOTE: Be certain all wiring complies with local building
codes and NEC and that the supply voltage for this
system is correct.
• Place the indoor unit on a solid work surface before
making electrical connections.
• To make the electrical connections for the indoor
unit, both the outer plastic and inner galvanized
steel cover plate must be removed.
• Raise the front cover to access the screws for
removing these covers.
• Rout the 14/4 AWG wiring through the slot in the
back of the unit and into the front access panel.
ENGLISH
E. Mount Indoor Unit to Mounting Plate
• Bundle the refrigerant piping, drain piping, and wiring
with tape and carefully rout the bundle through the
piping hole.
• With the top of the indoor unit closer to the wall,
hang the indoor unit on the upper hooks of the
mounting plate. Slide the unit slightly side to side to
verify proper placement.
• Rotate the lower portion of the indoor unit to the
mounting plate, and lower the unit onto the lower
hooks of the mounting plate. (see illustration)
• Verify the unit is secured and flush to the wall.
• Indoor Unit installation is finished at this time.
mounting plate
F. Condensate Drainage Pipe
• Verify the condensate drain line has a constant pitch
downward for proper water flow. There should be
no kinks or rises in the tubing which may cause a
trapping effect of the water (see illustration).
Optional: Can use PVC pipe by connecting a 1” ID
PVC pipe to the drain line coming out of the wall and
running to desired location.
31-5000001 Rev. 1
• Using a wire stripper, remove the insulation and
separate the 4 wires.
• Make wiring connections at each terminal according
to wiring diagram. (Take note of the color of the
wire at each terminal and ensure the wires are
connected to the outdoor unit accordingly.)
• Ensure each wire is under the screw terminal plate
and the plate is tightened.
• Ensure the 14/4 cable is secured under the strain
relief bracket.
• After the terminal block wiring is completed, replace
both cover plates and lower the front casing.
Less than
5cm
It becomes
high midway.
The end is immersed in water.
It waves.
The gap with the
ground is too small
There is the bad
smell from a sewer
G. To Remove the Indoor Unit
• Slightly raise the entire unit.
• Pull the lower portion of the unit off the lower hooks
and pull slightly away from the wall.
• Lift the upper portion of the unit off the upper hooks.
11
ENGLISH
35
N
1.84in (46mm)
0.236in (6mm)
Ø 2 1/4in (57mm)
3.150in (80mm)
1.85in (47mm)
35 T
Ø 2 1/4in (57mm)
INSTALLATION INSTRUCTIONS
Wall Brackets
2.795in (71mm)
Ø 2 1/4in (57mm)
0.472in (12mm)
40 N
50 N
50 T
100 N
4.961in (126 mm)
Ø 2 1/4in (57mm)
1.417in (36mm)
5.906in (150mm)
Ø 2 1/4in (57mm)
1.417in (36mm)
4.961in (126mm)
Ø 2 1/4in (57mm)
1.614in (41mm)
70 T
70 N
4.882in (124mm)
Ø 2 1/4in (57mm)
1.417in (36mm)
4.882in (124mm)
Ø 2 1/4in (57mm)
1.614in (41mm)
Capacity (BTUh) Bracket Style Part Number Factory Reference Number
07K/09K/12K 35N/35T/40N WJ65X23038/WJ65X23240/WJ65X23038 10101275/10103071/10101275
15K/18K 50N/50T/70N WJ65X23251/WJ65X23251/WJ65X23056 10102598/10102598/10102740
24K 70N/70T WJ65X23056/WJ65X23056 10102740/10102740
30K/36K 100N WJ65X22785 10103059
12
31-5000001 Rev. 1
INSTALLATION INSTRUCTIONS
Step 3 - Installation of the Outdoor Unit
A. Prepare the Outdoor Unit for Installation
• Remove all packaging.
• Place supplied vibration pads onto outdoor
unit’s feet.
• Place the unit on a solid foundation, 8” above
the average snowfall.
ENGLISH
B Attaching Drain Elbow to Outdoor Unit
• If required, attach the supplied drain elbow to
the outdoor unit. Connect extension piping as
needed (not supplied). (see illustration)
NOTE: The drain elbow is designed with an
air gap and will not sit flush to bottom of the
outdoor unit.
NOTE: Arctic Multi models will not use a drain
elbow. If condensate management is required
by code, a 3rd party pan is needed.
31-5000001 Rev. 1
13
ENGLISH
Outdoor unit
Power Wiring
3
2
1
)
(N)
(L
)
(
C
3
2
1
)
(N)
(L
)
(
C
Indoor unit 2
Control Wiring
4 Wire - 14 AWG
Stranded
To Service Disconnect
1
2
3
=White
=Black
=Red
=Green
Sugested Colors
230 Volt Supply. 1 to L1, 2 to L2.
Indoor unit 1
2
1
)
(
N
)
(
L
Strain Relief
Brackets
INSTALLATION INSTRUCTIONS
Step 3 - Installation of the Outdoor Unit (Cont.)
C. Electrical Connections for the Outdoor Unit
• Using a wire stripper, remove the insulation and
separate the wires.
WARNING
RISK OF ELECTRIC SHOCK.
Could cause injury or death.
Make sure power is off before touching wires.
NOTE: Be certain all wiring complies with local
building codes and NEC and that the supply
voltage for this system is correct.
• Connect the wiring for both the power source
• Verify that the wiring connections match the
indoor connections wire for wire.
• Ensure each wire is under the screw terminal
plate and the plate is tightened.
• Ensure the 14/4 wire cable is secured under the
strain relief bracket.
• Verify that all connections are secured
and the indoor wiring using a conduit cable
bracket on the side of the outdoor unit
NOTE: Failure to follow the wiring guidelines can result in control board damage and communication issues
(E7 error code). This includes improper wire size, use of solid core wire, midline splicing and poor terminal
connections.
Models:
TAD3U24MOU
TAD4U36MOU
Power Wiring
To Service Disconnect
230 Volt Supply. 1 to L1, 2 to L2.
Outdoor unit
Only on FlexFit 3U & 4U
and Arctic 2U & 3U
Diagnostic and Control
Only on FlexFit 4U
and Arctic 2U & 3U
43
)
(
1
N
Only on FlexFit 3U
)
(
L
2
43
Models: TAD2U18MOU
14
Indoor unit A
)
(
)
(N)
(L
C
1
3
2
A B C D
Strain Relief
Indoor unit B Indoor unit C Indoor unit D
Brackets
(N)
1
)
2
(
(L
3
)
(N)
C
1
Control Wiring
4 Wire - 14 AWG
Stranded
)
(L
2
)
(
C
3
)
(
)
(N)
(L
C
1
3
2
Sugested Colors
=White
1
=Black
2
=Red
3
=Green
31-5000001 Rev. 1
INSTALLATION INSTRUCTIONS
Step 3 - Installation of the Outdoor Unit (Cont.)
D. Wiring Error Check
• This unit is capable of automatically checking for wiring errors
between the indoor and outdoor units.
• To enter the wiring error check test, place all 4 DIP switches of
the test board to the ON position. (Illustration 6) Remove and
reapply power to the unit, the system will enter the operation
of “Wiring Error Check”.
• The numeric display will initialize and begin to alternate
between the compressor working frequency (a number
representing the Hz value) and “CH” (Checking).
• As the check is being performed, all units that are properly
connected will be indicated by the corresponding LED for that
circuit being lit constantly. (LED 1 = piping circuit A, LED 2 =
piping circuit B, ...)
• After the check has completed, if all wiring is correct,
the numeric display will indicate “0” and the single LEDs
representing the individual circuits for the connected indoor
units will be lit constantly.
• If there are any miswired units, the numeric display will flash
“EC” (error connection), and th corresponding LED for the
miswired circuit will flash. Check and correct the wiring as
needed.
LED 1 2 3 4 5 Message
OFF Unit not connected
ALL Flashing Automatic chekcing impossible, all units connected wrong
Status
ON Flashing Flashing ON Flashing ON: unit connected correctly
ON Flashing Flashing ON ON ON: unit connected correctly
ALL ON All units connected correctly
Only one LED flashing
• Refer to the chart shown below. (Table 2)
• When the test is complete, remove power to the system and
return the 4 DIP switches to the OFF position. Reapply power
to the the system. The test is complete.
• If the self-check is not possible, check the indoor unit wiring
and piping in the usual manner.
Flashing: unit connected wrong, need to change the wiring manually
between 2, 3, and 5
Flashing: unit connected wrong, need to change the wiring manually
between 2 and 3
ENGLISH
Connections Cautions
Model TAD4U36MOU TAD3U24MOU TAD2U18MOU
Connection priority
between indoor and
service valve higher
from down to up.
A
B
A
B
C
When there are 2
indoors, the prior
service valves are
When there are 3
indoors, the prior
service valves are
When there are 4
indoors, the prior
service valves are
NOTE: For better oil return and more reliable system, please execute as the above when connecting indoor unit.
31-5000001 Rev. 1
D C C B B A
D C B C B A /
D C B A / /
15
ENGLISH
Forced fastening without careful centering may
damage the threads and cause a refrigerant leak.
Pipe Diameter(ǿ) Fastening torque
Liquid side6.35mm(1/4") 18N.m/13.3Ft.lbs
Liquid/Gas side9.52mm(3/8") 42 N.m/30.1Ft.lbs
Gas side 12.7mm(1/2") 55N.m/40.6Ft.lbs
Gas side 15.88mm(5/8") 60 N.m/44.3Ft.lbs
Half union
Flare nut
h
Forced fastening without careful centering may
damage the threads and cause a refrigerant leak.
Pipe Diameter(ǿ) Fastening torque
Liquid side6.35mm(1/4") 18N.m/13.3Ft.lbs
Liquid/Gas side9.52mm(3/8") 42 N.m/30.1Ft.lbs
Gas side 12.7mm(1/2") 55N.m/40.6Ft.lbs
Gas side 15.88mm(5/8") 60 N.m/44.3Ft.lbs
Outdoor unit
Indoor unit
A
B
Outdoor unit
Indoor unit
A
B
A
B
Outdoor unit
Indoor unit
Oil trap
CAUTION
Max. Elevation: A Max
= 33ft / 10m (09k / 12k)
= 50ft / 15m (18k / 24k)
In case the height of A is more than
15ft / 5m, an oil trap should be
installed every 16-23ft /5-7m
Max. Length: B Max
= 50ft / 15m (09k / 12k)
= 83ft / 25m (18k / 24k)
●
●
●
INSTALLATION INSTRUCTIONS
Step 3 - Installation of the Outdoor Unit (Cont.)
E. Install Copper Lineset
• The standard line set length is 25 feet. If
the installation length is different, adjust the
refrigerant charge by 0.2 oz/ft if the liquid line
is 1/4”, or 0.5 oz/ft if the liquid line is 3/8”.
• See table on page 15.
• Cut the line set to length.
• Place nut over the pipe and then flare with the
R-410A flaring tool.
NOTE: Follow standard practices for creating
pipe flares. When cutting and reaming the
tubing, use caution to prevent dirt or debris
from entering the tubing. Remember to place
nut over the tubing before flaring.
• To join the line set, directly align the tubing
flare to the fitting on the other pipe. Slide the
nut onto the fitting and hand tighten.
• Torque the fittings according to the
specifications shown in the torque chart below.
• Two wrenches are required to
join the flare connection; one
standard wrench and one torque
wrench adjusted to the proper
settings.
• Repeat the process for
attaching the other end of the
line set.
16
F. Leak Test
FlexFit multi-zone models 2U18MS and 3U24MS do
not have master service valves. Perform the following
steps for EACH line set.
The FlexFit multi-zone model 4U36MS and Arctic multi
models 2U20EH and 3U24EH have a master service
valve. Performing the following steps will test ALL line
sets.
• Remove the cap on the service valve.
• Using a tank of dry nitrogen and approved regulator,
charge the system with 150 psig of dry nitrogen
using mini-split adapter to connect the valve.
• Check for leaks at the flare fittings using soap
bubbles or another detection device. If a leak is
detected, make repairs to the fittings and recheck.
If no leaks are detected within 3 minutes, proceed.
• Using the same tank/regulator, charge the system
to 300 psig.
• Check for leaks as earlier. If no leaks are detected
within 3 minutes, proceed.
• Using the same tank/regulator, charge the system
to 500 psig.
• Check for leaks as earlier. Keep system pressurized
for at least 20 minutes.
WARNING
Do not use acetylene, oxygen or
compressed air or mixtures
containing them for pressure testing. Do not use
mixtures of hydrogen containing refrigerant and air
above atmospheric pressure for pressure testing as
they may become flammable and could result in an
explosion. Refrigerant, when used as a trace gas,
should only be mixed with dry nitrogen for pressurizing
units. Failure to follow these recommendations could
result in death or serious injury as well as equipment or
property damage.
G. System Evacuation
Spanner
Torque wrenc
NOTE– Do not open service valve.
• Remove the suction line cap and attach a manifold
gauge, micron gauge, and vacuum pump to
the suction line port using adapter AD-87 (see
illustration).
• Evacuate the system to at least 350 microns.
• Close the vacuum pump valve and check the micron
gauge. If the gauge rises above 150 microns in 60
seconds, the evacuation is incomplete or there
is a leak in the system. If the gauge does not rise
above 150 microns in 60 seconds, the evacuation is
complete.
• Once evacuation is complete, remove the adapter
and hose connection from the suction line port and
replaced the cap.
31-5000001 Rev. 1
INSTALLATION INSTRUCTIONS
Step 3 - Installation of the Outdoor Unit (Cont.)
H. Refrigerant Charging
• Add any additional refrigerant after evacuation using a
digital scale.
NOTE: Charge liquid only.
• Fill out the refrigerant charge label using indelible ink.
• Place the factory refrigerant charge found in table on
page 15 in the box number 1.
• Place the amount of additional refrigerant added in box
number 2.
• Add boxes 1 and 2 together and place the value in the
sum box (D).
• Adhere the filled out label in the proximity of the
product charging port and under the outside unit valve
cover.
• If no sticker found, write amounts on outdoor unit with
permanent marker above the charging port.
• Remove the cap from the liquid line valve. Using a hex
wrench, open the valve, then replace and tighten the
cap securly to avoid leaks.
• Remove the cap from the suction line valve. Using a
hex wrench, open the valve, then replace and tighten
the cap securly to avoid leaks.
• Wrap the line set, drain line, and 14/4 AWG wiring
Step 4 - Final Check
starting at the bottom of the bundle with an overlap
type wrap until you reach the piping hole.
• Use a sealant to seal the piping hole opening on both
sides of the wall in order to prevent drafts, weather, or
pests from entering the building.
This product contains fluorinated greenhouse gases
covered by the Kyoto Protocol. Do not vent into the
atmosphere.
Contains fluorinated greenhouse gases
covered by the Kyoto Protocol
R410A
2
1
F E
Refrigerant type: R-410A
GWP* value: 1975
GWP = global warming potential
1=
2=
1+2=
oz
oz
oz
A
B
C
D
ENGLISH
System Test
Please explain to the customer how to operate the system
by using the Owner’s Manual found with the indoor unit.
Explaining Operation To the End User
• Using the User Manual, explain to the user how to use
the air conditioner/heat pump, (the remote controller,
adding/removing the air filters, placing or removing
the remote controller from the remote control holder,
cleaning methods, precautions for operation, etc.)
• Review precautions for operation.
• Recommend that the user read the Operating
Instructions carefully.
Check Items for Test Run
No gas leak from linesets?
Are the linesets insulated properly?
Are the connecting wirings of indoor and outdoor firmly
inserted to the terminal block?
Is the connecting wiring of indoor and outdoor fixed?
Is condensate draining correctly?
Is the ground wire securely connected? Is the indoor
unit securely fixed?
Is power source voltage correct according to local
code?
Is there any odd noise?
Does the cooling temperature drop between 20-30°F?
Does the heating temperature raise between 35-40°F?
Is the room temperature display accurate?
31-5000001 Rev. 1
17
Loading...