Friedrich Ductless split system User manual

960-911-06
Installation Manual
TYPE : Single Zone
ENGLISH
FRANÇAIS
ESPAÑOL

Air Conditioner Installation Manual
CONTENTS
Safety Precautions ..............................................................................................3
Installation of Outdoor Unit................................................................................6
Wiring Connection...............................................................................................8
Connecting Copper Pipes.................................................................................11
Leakage test and Evacuation ...........................................................................17
Test running .......................................................................................................19
Function..............................................................................................................20
Self-diagnosis Function....................................................................................21
Installation Guide at the Seaside .....................................................................22
2Air Conditioner

To prevent the injury of the user or other people and property damage, the following instructions
must be followed.
■Be sure to read before installing the air conditioner.
■Be sure to observe the cautions specified here as they include important items related to safety.
■Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is
classified by the following indications.
■The meanings of the symbols used in this manual are as shown below.
This symbol indicates the possibility of death or serious injury.
This symbol indicates the possibility of injury or damage to properties only.
■Installation
Be sure not to do.
Be sure to follow the instruction.
Safety Precautions
Always perform grounding.
• Otherwise, it may cause electri-
cal shock.
Ensure that the power cord
used is not frayed or dam-
aged in anyway.
• Otherwise, it may cause a fire
or electrical shock.
Please contact a licensed ser-
vice center or installer to install
this equipment.
• Otherwise, it may cause a fire, elec-
trical shock, explosion or injury.
Securely attach the electrical
part cover to the indoor unit
and the service panel to the
outdoor unit.
•
If the electrical part cover of the indoor
unit and the service panel of the out-
door unit are not attached securely, it
could result in a fire or electric shock
due to dust, water, etc.
Ensure a dedicated circuit
breaker is installed as well as
an independent electrical dis-
connect.
• No installation may cause a fire
and electrical shock.
Do not keep or use flammable
gases or combustibles near
the air conditioner.
• Otherwise, it may cause a fire
or the failure of product.
Ensure that the outdoor system is free of dam-
age prior to installation.
• It may cause injury or an accident.
Do not service this equipment unless you are
a licensed contractor.
• It will cause a fire or electrical shock.
Use a vacuum pump or Inert (nitrogen) gas when doing leakage test or air purge. Do not use
oxygen, compressed air or other gases which may be flammable or harmful. Doing so causes
risk for fire, explosion, injury or death.
• There is the risk of death, injury, fire or explosion.
Installation Manual 3
Safety Precautions
ENGLISH

4Air Conditioner
Safety Precautions
Ensure that system is properly secured once
installation is complete.
• Otherwise, it may result in personal injury.
Use caution when unpacking and installing.
• Sharp edges may cause injury.
Do not use the power cord
near the heating tools.
• Otherwise, it may cause a fire
and electrical shock.
Do not open the suction
inlet of the indoor/outdoor
unit during operation.
• Otherwise, it may electrical
shock and failure.
If equipment is submerged.
Please shut off power and
call a service center.
• Otherwise, it may cause the
failure of machine or electrical
shock.
Hold the plug by the head
when taking it out.
• It may cause electric shock
and damage.
Never touch the metal parts
of the unit when removing
the filter.
• They are sharp and may
cause injury.
Do not use the equipment
as a step or a shelf.
• It may cause an injury through
dropping of the unit or falling
down.
Do not place a heavy object
on the power cord.
• Otherwise, it may cause a fire
or electrical shock.
When the product is sub-
merged into water, always
contact the service center.
• Otherwise, it may cause a fire
or electrical shock.
Take care so that children
may not step on the outdoor
unit.
• Otherwise, children may be
seriously injured due to falling
down.
Ensure system is installed
on a dedicated circuit.
• It will cause an electric shock
or a fire due to heat genera-
tion.
Do not use the damaged
power cord.
• Otherwise, it may cause a fire
or electrical shock.
Do not alter the power cord
without seeking assistance
from a licensed professional.
• Otherwise, it may cause a fire
or electrical shock.
Ensure power cord is
securely in place and care
is taken to prevent cord
from being pulled loose.
• Otherwise, it may cause a fire
or electrical shock.
Unplug the unit if strange
sounds, smell, or smoke
comes from it.
• Otherwise, it may cause elec-
trical shock or a fire.
Keep unit clear of any heat
source.
• Otherwise, it may cause a fire.
■Operation

Installation Manual 5
Safety Precautions
ENGLISH
■Installation
Ensure drain is securely fastened.
• Otherwise, it may cause water leakage.
Install in area where consideration of sur-
roundings have been made, noise and heat
may not affect those nearby.
• Otherwise, it may cause dispute with the neigh-
bors.
Always check for leaks at all connections, if
leak is found perform proper repairs.
• Otherwise, it may cause the failure of product.
Ensure equipment is level during installa-
tion.
• Otherwise, it may cause vibration or water
leakage.
Avoid excessive cooling and perform venti-
lation sometimes.
• Otherwise, it may do harm to your health.
Use a soft cloth to clean. Do not use wax,
thinner, or a strong detergent.
• The appearance of the air conditioner may
deteriorate, change color, or develop surface
flaws.
Do not use an appliance for special purposes
such as preserving animals vegetables, pre-
cision machine, or art articles.
• Otherwise, it may damage your properties.
Do not block or restrict the airflow inlet or
outlet.
• Otherwise, it may cause the failure of appli-
ance or an accident.
■Operation

1. Installation Locations
• If an awning is built over the unit to prevent
direct sunlight or rain exposure, make sure
that heat radiation from the condenser is not
restricted.
• Ensure that the spaces indicated by the
arrows around the front, back and side of the
unit are followed.
• Do not place animals and plants in the path of
the warm air.
• Take the air conditioner weight into account
and select a place where noise and vibration
are minimum.
• Be considerate of the surroundings when
choosing the location for the equipment to be
installed.
More than
300(11 13/16)
Fence or
obstacles
More than
700(27 9/16)
More than
600(23 21/32)
More than
More than
300(11 13/16)
300(11 13/16)
More than
300(11 13/16)
Sunroof
Installation of Outdoor Unit
Installation of Outdoor Unit
2. Piping length and the elevation
If installed tube is shorter than 7.6 m, additional charging is not necessary.
Additional Refrigerant = (A -7.6) x Additional refrigerant (g)
6Air Conditioner
Outdoor unit
Indoor unit
A
B
Outdoor unit
Indoor unit
A
B
Unit : mm(inch)
Model
Pipe Size
mm(inch)
Length A
Unit : m(ft)
Elevation B
Unit : m(ft)
Additional
refrigerant
Unit :
g/m(oz/ft)
Gas Liquid Standard Max. Standard Max.
MR24UY3J Ø15.88(5/8) Ø9.52(3/8) 7.6(25) 50(164) 5(16) 30(98) 40(0.43)
MR36UY3J Ø15.88(5/8) Ø9.52(3/8) 7.6(25) 75(246) 5(16) 30(98) 40(0.43)

Installation of Outdoor Unit
Installation Manual 7
ENGLISH
Night Silent Operation setting
1. Open the Side panel or Top Cover of outdoor unit.
2. Set the SW01N (PIP SW2).
3. Close the Side panel or Top Cover.
6
SW01N
SW01N
MR24UY3J MR36UY3J
6
MR24UY3J MR36UY3J

The power cord connected to the outdoor unit should be complied
withIEC 60245 or HD 22.4 S4 (This equipment shall be provided with a
cord set complying with the national regulation.
The connecting cable connected to the outdoor unit should be
complied with IEC 60245 or HD 22.4 S4 (This equipment shall be
provided with a cord set complying with the national regulation.)
If the supply cord is damaged, it must be replaced by a special cord or assembly availible from the manufacturer of its service agent.
CAUTION
NORMAL
CROSS-SECTIONAL
AREA 0.75mm2
When the connection line between the indoor unit and
outdooor unit is over 40m, connect the telecommunication
line and power line separately.
20mm
GN/YL
35±5mm
10±3mm
GN/YL
20mm
35±5mm
10±3mm
Wiring Connection
Wiring Connection
Electrical Wiring
Outdoor
Indoor
Main
power source Switch box
ELCB
Perform the electrical wiring work according to the electrical wiring connection.
• All wiring must comply with local requirements.
•
Select a power source that is capable of supply-
ing the current required by the air conditioner.
• Use a recognized ELCB(Electric Leakage Cir-
cuit Breaker) between the power source and
the unit. A disconnection device to adequately
disconnect all supply lines must be fitted.
• Model of circuit breaker recommended by
authorized personnel only
8Air Conditioner
Connecting Cables between Indoor Unit and Outdoor Unit
Model Phase(Ø) ELCB
MR24UY3J 1 30A
MR36UY3J 140A
Model Phase(Ø) Area(mm
2
)
MR24UY3J
(AUUW24GD2) 12.5
MR36UY3J
(AUUW36GD2) 15
Outdoor
unit Indoor unit
1
2
3
1
2
3

Wiring Connection
Installation Manual 9
ENGLISH
• For wiring, use the designated power wire and connect firmly, then secure to prevent outside pres-
sure being exerted on the terminal block.
• Use an appropriate screwdriver for tightening the terminal screws. A screwdriver with a small head
will strip the head and make proper tightening impossible.
• Over-tightening the terminal screws may break them.
When none are available, follow the instructions below.
• Do not connect wiring of different thicknesses to the power terminal block. (Slack in the power
wiring may cause abnormal heat.)
• When connecting wiring which is the same thickness, do as shown in the figure below.
◆
Precautions when laying power wiring
Round pressure terminal Power wire
Use round pressure terminals for connections to the power terminal block.

Wiring Connection
CAUTION:
• The circuit diagram is not subject to change without notice.
• Be sure to connect wires according to the wiring diagram.
• Connect the wires firmly, so that not to be pulled out easily.
• Connect the wires according to color codes by referring to the wiring diagram.
Makes sure rubber bushings are properly
used in knock out holes after connecting
main power.
Insulation
Main
Terminal
Block
Cord clamp
Cord clamp
• Remove the side panel for wiring connection.
• Use the cord clamp to fix the cord.
• Grounding work
- connect the cable of diameter more to the grounding terminal provided in the control
box and do grounding
Connecting the cable to Outdoor Unit
10 Air Conditioner
CAUTION:
• The power cord should be selected according to the specifications below.

Connecting Copper Pipes
Connecting Copper Pipes
Preparation of Piping
Main cause of gas leakage is defect in flaring
work. Carry out correct flaring work in the fol-
lowing procedure.
Cut the pipes and the cable.
• Use the accessory piping kit or the pipes
purchased locally.
• Measure the distance between the indoor
and the outdoor unit.
• Cut the pipes a little longer than measured
distance.
•
Cut the cable 1.5m (5ft) longer than the
pipe length.
Burr removal
• Completely remove all burrs from the cut
cross section of pipe/tube.
• Ensure that the tube/pipe is in the down-
ward position to keep burrs and other cont-
aminants from entering the system.
Installing flare nut
• Remove flare nuts attached to indoor and
outdoor units, than put them on pipe/tube
having completed burr removal.
(Not possible to put them on after flaring work)
Flaring work
• Carry out flaring work using dedicated flar-
ing tool for R-410A as shown below.
Firmly hold copper tube in a bar(or die) as
indicated dimension in the table above.
Check
• Compare the flared work with figure below.
• If flare is noted to be defective, cut off the
flared section and do flaring work again.
Outside diameter "A"
mm inch mm
Ø6.35 1/4 1.1~1.3
Ø9.52 3/8 1.5~1.7
Ø12.7 1/2 1.6~1.8
Ø15.88 5/8 1.6~1.8
Installation Manual 11
ENGLISH
Copper
tubing
90 Slanted Uneven Rough
Pipe
Reamer
Point down
Flare nut
Copper tubing
Bar
Copper tubing
Clamp handle Red arrow mark
Cone
Yoke
Handle
Bar
"A"
Inclined
Inside is shining without scratches
Smooth all round
Even length
all round
Surface
damaged Cracked Uneven thickness
= Improper flaring =

12 Air Conditioner
Connecting Copper Pipes
Pipe must be able to obtain the specified thickness and should be used with low impurities.
Also when handling storage, pipe must be careful to prevent a fracture, deformity and wound.
Should not be mixed with contaminations such as dust, moisture.
Refrigerant piping on three principles
Plumbing materials and storage methods
Drying Cleanliness Airtight
Should be no moisture inside No dust inside. There is no refrigerant leakage
Items
Moisture
Dust
Leakage
Cause failure
- Significant hydrolysis of refriger-
ant oil
- Degradation of refrigerant oil
- Poor insulation of the compres-
sor
- Do not cold and warm
- Clogging of EEV, Capillary
- Degradation of refrigerant oil
- Poor insulation of the compres-
sor
- Do not cold and warm
- Clogging of EEV, Capillary
- Gas shortages
- Degradation of refrigerant oil
- Poor insulation of the compres-
sor
- Do not cold and warm
Countermea-
sure
- No moisture in the pipe
- Until the connection is complet-
ed, the plumbing pipe entrance
should be strictly controlled.
- Stop plumbing at rainy day.
- Pipe entrance should be taken
side or bottom.
- When removal burr after cutting
pipe, pipe entrance should be
taken down.
- Pipe entrance should be fitted
cap when pass through the
walls.
- No dust in the pipe.
- Until the connection is complet-
ed, the plumbing pipe entrance
should be strictly controlled.
- Pipe entrance should be taken
side or bottom.
- When removal burr after cutting
pipe, pipe entrance should be
taken down.
- Pipe entrance should be fitted
cap when pass through the
walls.
- Airtightness test should be.
- Brazing operations to comply
with standards.
- Flare to comply with standards.
- Flange connections to comply
with standards.

Connecting Copper Pipes
Installation Manual 13
ENGLISH
Nitrogen substitution method
Welding, as when heating without nitrogen substitution a large amount of the oxide film is formed
on the internal piping.
The oxide film is a caused by clogging EEV, Capillary, oil hole of accumulator and suction hole of oil
pump in compressor.
It prevents normal operation of the compressor.
In order to avoid this problem, Welding should be done after replacing air by nitrogen gas.
When welding plumbing pipe, the work is required.
◆How to work
Regulator
Nitrogen gas
Pressure 0.02MPa less
Auxiliary valve
Taping
(Should not
contain air)
Welding Point
Note) should not block the outlet side.
When the internal pressure in pipe is abo
ve the atmospheric pressure, pinhole is o
ccurred and it is a leakage cause.
Oxide scale
Nitrogen
CAUTION:
1. Always use the nitrogen.(not use oxygen, carbon dioxide, and a Chevron gas):
Please use the following nitrogen pressure 0.02MPa
Oxygen --------- Promotes oxidative degradation of refrigerant oil.
Because it is flammable, it is strictly prohibited to use
Carbon dioxide --- Degrade the drying characteristics of gas
Chevron Gas ---- Toxic gas occurs when exposed to direct flame.
2. Always use a pressure reducing valve.
3. Please do not use commercially available antioxidant.
The residual material seems to be the oxide scale is observed.
In fact, due to the organic acids generated by oxidation of the alcohol contained in the
anti-oxidants, ants nest corrosion occurs. (causes of organic acid → alcohol + copper +
water + temperature)

• Align the center of the piping and sufficiently
tighten the flare nut by hand.
• Finally, tighten the flare nut with torque wrench
until the wrench clicks.
- When tightening the flare nut with torque
wrench, ensure the direction for tightening
follows the arrow on the wrench.
❈When tighten the pipe, hold the valve body.
mm inch N.m
Ø6.35 1/4 16±2
Ø9.52 3/8 38±4
Ø12.7 1/2 55±6
Ø15.88 5/8 75±7
Outside diameter Torque
Outdoor unit
Continuous
Torque wrench
Connecting Copper Pipes
Connecting the pipes to the Outdoor unit
14 Air Conditioner
Forward Sideways
Backward
Downward
<Figure 1>

Connecting Copper Pipes
• When pipes are to be routed through the bottom
of the equipment ensure knock out plugs have
been removed. (refer to figure 2)
Preventing foreign objects from entering
(Figure3)
• Plug all pipe access locations with putty or insu-
lation (Purchased Locally) to close off any poten-
tial gaps, as show in fig 3
Putty or insulating material
(produced locally)
Drain hose
Communication
cable
Liquid side piping
(Smaller Dia).
Gas side piping
(Bigger Dia).
Refrigerant pipe
<Figure 3>
Knock-out Base pan
<Figure 2>
Installation Manual 15
ENGLISH
CAUTION:
Insects or small animals entering the
outdoor unit may cause a short circuit
in the electrical box.

Connecting Copper Pipes
Forming the piping
Form the piping by wrapping the
connecting portion of the indoor
unit with insulation material and
secure it with two kinds of vinyl
tape.
• If you want to connect an additional drain
hose, the end of the drain outlet should be
routed above the ground. Secure the drain
hose appropriately.
In cases where the outdoor unit is
installed below the indoor unit per-
form the following.
1. Tape the piping, drain hose and connecting
cable from down to up.
2. Secure the tapped piping along the exteri-
or wall using saddle or equivalent.
In cases where the outdoor unit is
installed above the indoor unit per-
form the following.
1. Tape the piping and connecting cable from
down to up.
2. Secure the taped piping along the exterior
wall. Form a trap to prevent water entering
the room.
3. Fix the piping onto the wall by saddle or
equivalent.
Trap
Plastic
band
Seal a small
opening around
the pipings with
gum type sealer.
TrapTrapTrap
Seal a small openingSeal a small opening
around the pipingsaround the pipings
with gum type sealer.with gum type sealer.
Seal a small opening
around the pipings
with gum type sealant.
16 Air Conditioner
• Trap is required to prevent water from entering
into electrical parts.
Taping
Drain hose
Pipings
Connecting
cable
Power supply
cord
PlasticPlastic
bandband
Plastic
band
Seal a smallSeal a small
opening aroundopening around
the pipings withthe pipings with
gum type sealer.gum type sealer.
Seal a small
opening around
the pipings with
gum type sealant.
Trap
Seal a small opening
around the pipings
with gum type sealer.

Leakage test and Evacuation
Leakage test and Evacuation
Air and moisture remaining in the refrigerant system have undesirable effects as indicated below.
1. Pressure in the system rises.
2. Operating current rises.
3. Cooling(or heating) efficiency drops.
4. Moisture in the refrigerant circuit may freeze and block capillary tubing.
5. Water may lead to corrosion of parts in the refrigeration system.
Therefore, the indoor/outdoor unit and connecting tube must be checked for leaks, and vacuumed
to remove incondensible gas and moisture in the system.
• Check that each tube(both liquid and gas side tubes) between the indoor and outdoor units have been
properly connected and all wiring for the test run has been completed. Remove the service valve caps
from both the gas and the liquid side on the outdoor unit. Check that both the liquid and the gas side ser-
vice valves on the outdoor unit are kept closed at this stage.
• Connect the manifold valve(with pressure gauges)
and dry nitrogen gas cylinder to this service port
with charge hoses.
CAUTION: Be sure to use a mani-
fold valve for leakage test.
If it is not available, use a stop valve for
this purpose. The "Hi" knob of the man-
ifold valve must always be kept close.
• Pressurize the system to no more than 3.0
Mpa with dry nitrogen gas and close the cylin-
der valve when the gauge reading reaches 3.0
MPa Next, test for leaks with liquid soap.
CAUTION: To avoid nitrogen enter-
ing the refrigerant system in a liquid
state, the top of the cylinder must be high-
er than its bottom when you pressurize the
system. Usually, the cylinder is used in a
vertical standing position.
1. Do a leakage test of all joints of the
tubing(both Indoor unit and outdoor unit) and
both gas and liquid side service valves.
Bubbles indicate a leak. Be sure to wipe off
the soap with a clean cloth.
2. After the system is found to be free of leaks,
relieve the nitrogen pressure by loosening
the charge hose connector at the nitrogen
cylinder. When the system pressure is
reduced to normal, disconnect the hose from
the cylinder.
Preparation
Leakage test
Charge hose
Indoor unit
Outdoor unit
Manifold valve
Lo Hi
Pressure
gauge
Nitrogen gas
cylinder(in vertical
standing position)
Installation Manual 17
ENGLISH

Leakage test and Evacuation
1. Connect the charge hose end described in the pre-
ceding steps to the vacuum pump to evacuate the
tubing and indoor unit.
Confirm the "Lo and Hi" knob of the manifold valve
is open. Then, run the vacuum pump.
The operation time for evacuation varies with tub-
ing length and capacity of the pump. The following
table shows the time required for evacuation.
2. When the desired vacuum is reached, close the "Lo
and Hi" knob of the manifold valve and stop the
vacuum pump.
Finishing the job
1. With a service valve wrench, turn the valve stem of
liquid side valve counter-clockwise to fully open the
valve.
2. Turn the valve stem of gas side valve counter-
clockwise to fully open the valve.
3. Loosen the charge hose connected to the gas side
service port slightly to release the pressure, then
remove the hose.
4. Replace the flare nut and its bonnet on the gas
side service port and fasten the flare nut securely
with an adjustable wrench. This process is very
important to prevent leakage from the system.
5. Replace the valve caps at both gas and liquid side
service valves and fasten them tight.
This completes air purging with a vacuum pump.
The air conditioner is now ready to test run.
Indoor unit
Outdoor unit
Lo Hi
Manifold valve
Vacuum pump
Open Open
Pressure
gauge
Gas pipe
Evacuation
Required time for evacuation when 30 gal/h
vacuum pump is used
30 min. or more 60 min. or more
0.07 kPa or less
If tubing length is less
than 10 m(33 ft)
If tubing length is longer
than 10 m(33 ft)
18 Air Conditioner

Test running
1. PRECAUTIONS IN TEST RUNNING
• The initial power supply must provide at least 90% of the rated voltage.
Otherwise, the air conditioner should not be operated.
CAUTION ①Always initialize first test in Cooling Mode even if started in the heat-
ing season, if first test is run in heating compressor damage could
occur.
② Carry out the test run more than 5 minutes without fail.
(Test run will be cancelled 18 minutes later automatically)
• The test run is started by pressing the room temperature button and down button for 3 seconds
at the same time.
• To cancel the test run, press any button.
CHECK THE FOLLOWING ITEMS WHEN INSTALLATION IS COMPLETE
• After completing work, be sure to measure and record test run properties, and store measured
data, etc.
• Items to measure are room temperature, outside temperature, suction temperature, discharge
temperature, wind velocity, wind volume, voltage, current, presence of abnormal vibration and
noise, operating pressure, piping temperature, compressor pressure.
• Also inspect the installation and appearance, check following items.
2. Connection of power supply
1. Connect the power supply cord to the independent power supply.
• Circuit breaker is required.
2. Operate the unit for fifteen minutes or more.
3. Evaluation of the performance
1. Measure the temperature of the
intake and discharge air.
2. Ensure the difference between the
intake temperature and the discharge
one is more than 46°F (Cooling) or
reversely (Heating).
□Is the circulation of air adequate?
□Is the draining smooth?
□Is the heat insulation complete
(refrigerant and drain piping)?
□Is there any leakage of refrigerant?
□Is the remote controller switch operated?
□Is there any faulty wiring?
□Ensure terminal screws are not adjusted.
(Torque for screw size)
M4…..11 lbf.in / 118 N.cm(12 kgf.cm)
M5…..18 lbf.in / 196 N.cm(20 kgf.cm)
M6…..22 lbf.in / 245 N.cm(25 kgf.cm)
M8…..53 lbf.in / 588 N.cm(60 kgf.cm)
Test running
Thermometer
Installation Manual 19
ENGLISH
HAND OVER
Teach the customer the operation and maintenance procedures, using the operation manual.
(air filter cleaning, temperature control, etc.)

20 Air Conditioner
Function
Function
Forced Cooling Operation
• Adding the refrigerant in winter.
Setting Procedure
1) Set the Dip Switch as follow after shutting the power source down.
2) Reset the power.
3) Red LED and Green LED of PCB lights during work.
(The indoor unit is operated by force.)
4) If operation is done, Red LED will be turned off.
If operation is not done normally, Red LED will blink.
5) Close the Liquid valve only after green LED turned off (7 minutes from the start of the machine).
Then close the gas valve after Green LED on.
WARNING:
• When the green LED of PCB is on, compressor is going to be off because of low
pressure.
• You should return the Dip Switch to operate normally after finishing the operation.
• Improper Pump down will lead to product turn off along with LED (green &red) off
with in 20 minutes from the initial start.
6
Pump Down Dip S/W Setting
Power on
(Red LED On, Green LED Off)
Comp on
(Red LED On, Green LED On)
Pump Down Start
(Red LED On, Green LED Off) Liquid Valve Closed
Gas Valve Closed
Pump Down Complete
(Red LED Off, Green LED On)
Power off
(Red LED Off, Green LED On)
MR24UY3J MR36UY3J