Daikin | FTXS46KVMA | Installation manual | Daikin FTXS46KVMA Installation manual

3P232733-1A M08B058A
Two-dimensional bar code
is a code for manufacturing.
Safety Precautions
• Read these Safety Precautions carefully to ensure correct installation.
• This manual classifies the precautions into DANGER, WARNING and CAUTION. Be sure to follow all the
precautions below: they are all important for ensuring safety.
Indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury.
Failure to follow any of WARNING is likely to result in such grave consequences as death or serious injury.
Failure to follow any of CAUTION may in some cases result in grave consequences.
• The following safety symbols are used throughout this manual:
Be sure to observe this instruction.
Be sure to establish an earth
Never attempt.
• After completing installation, test the unit to check for installation errors. Give the user adequate instructions
concerning the use and cleaning of the unit according to the Operation Manual.
• Refrigerant gas is heavier than air and replaces oxygen. A massive leak could lead to oxygen depletion, especially
in basements, and an asphyxiation hazard could occur leading to serious injury or death.
• If the refrigerant gas leaks during installation, ventilate the area immediately.
Refrigerant gas may produce a toxic gas if it comes in contact with fire such as from a fan heater, stove or cooking device. Exposure to this gas could cause severe injury or death.
• After completing the installation work, check that the refrigerant gas does not leak.
Refrigerant gas may produce a toxic gas if it comes in contact with fire such as from a fan heater, stove or cooking device. Exposure to this gas could cause severe injury or death.
• Do not ground units to water pipes, telephone wires or lightning rods because incomplete grounding could cause a severe shock hazard
resulting in severe injury or death, and to gas pipes because a gas leak could result in an explosion which could lead to severe injury or death.
• Safely dispose of the packing materials. Packing materials, such as nails and other metal or wooden parts, may cause stabs or other injuries. Tear
apart and throw away plastic packaging bags so that children will not play with them. Children playing with plastic bags face the danger of death by suffocation.
• Do not install unit in an area where flammable materials are present due to risk of explosion resulting in serious injury or death.
• Do not ground units to telephone wires or lightning rods because lightning strikes could cause a severe shock hazard resulting in
severe injury or death, and to gas pipes because a gas leak could result in an explosion which could lead to severe injury or death.
• Installation should be left to the authorized dealer or another trained professional.
Improper installation may cause water leakage, electrical shock, fire, or equipment damage.
• Install the air conditioner according to the instructions given in this manual.
Incomplete installation may cause water leakage, electrical shock, fire or equipment damage.
• Be sure to use the supplied or exact specified installation parts.
Use of other parts may cause the unit to come to lose, water leakage, electrical shock, fire or equipment damage.
• Install the air conditioner on a solid base that is level and can support the weight of the unit.
An inadequate base or incomplete installation may cause injury or equipment damage in the event the unit falls off the base or comes loose.
• Electrical work should be carried out in accordance with the installation manual and the national, state and local electrical wiring codes.
Insufficient capacity or incomplete electrical work may cause electrical shock, fire or equipment damage.
• Be sure to use a dedicated power circuit. Never use a power supply shared by another appliance. Follow all appropriate electrical codes.
• For wiring, use a wire or cable long enough to cover the entire distance with no splices if possible. Do not use an extension cord. Do not put other
loads on the power supply. Use a only a separate dedicated power circuit. (Failure to do so may cause abnormal heat, electric shock, fire or equipment damage.)
• Use the specified types of wires for electrical connections between the indoor and outdoor units. Follow all state and local electrical codes.
Firmly clamp the interconnecting wires so their terminals receive no external stresses. Incomplete connections or clamping may cause terminal overheating, fire or equipment damage.
• After connecting all wiring be sure to shape the cables so that they do not put undue stress on the electrical covers, panels or terminals.
Install covers over the wires. Incomplete cover installation may cause terminal overheating, electrical shock,fire or equipment damage.
• When installing or relocating the system, be sure to keep the refrigerant circuit free from all substances other than the specified refrigerant (R410A), such as air.
(Any presence of air or other foreign substance in the refrigerant circuit causes an abnormal pressure rise which may result in rupture, resulting in injury.)
Safety Precautions
• During pump-down, stop the compressor before removing the refrigerant piping.
If the compressor is still running and the stop valve is open during pump-down, air will be sucked in when the refrigerant piping is removed,
causing abnormally high pressure which could lead to equipment damage or and personal injury.
• During installation, attach the refrigerant piping securely before running the compressor.
If the compressor is not attached and the stop valve is open during pump-down, air will be sucked in when the compressor is run, causing
abnormally high pressure which could lead to equipment damage and personal injury.
• Install a leak circuit breaker, as required. If a leak circuit breaker is not installed, electric shock may result.
• Be sure to install a ground fault circuit interrupter breaker. Failure to install a ground fault circuit interrupter breaker may result in electrically shocks, or fire personal injury.
• Do not install the air conditioner where gas leakage would be exposed to open flames.
If the gas leaks and builds up around the unit, it may catch fire.
• Establish drain piping according to the instructions of this manual. Inadequate piping may cause water damage.
• Tighten the flare nut according to the specified torque. A torque wrench should be used.
If the flare nut is tightened too much, the flare nut may crack over time and cause refrigerant leakage.
• Do not touch the heat exchanger fins.
Improper handling may result in injury.
• Be very careful about product transportation. Some products use PP bands for packaging. Do not use any PP bands for a means of transportation. It is dangerous.
• Make sure to provide for adequate measures in order to prevent that the outdoor unit be used as a shelter by small animals.
Small animals making contact with electrical parts can cause malfunctions, smoke or fire. Please instruct the customer to keep the area around the unit clean.
Accessories supplied with the outdoor unit:
(B) Drain plug
(A) Installation manual
Located on the bottom
of the packing case.
Precautions for Selecting the Location
Choose a place strong enough to bear the weight and vibration of the unit, The location should not amplified the unit noise.
Choose a location where the hot air discharged from the unit and the operationing noise will not be a nuisance to the neighbors.
Avoid noise sensitive locations such as bedrooms to avoid future problems.
There must be sufficient clearance for carrying the unit into and out of the site.
There must be sufficient space around the air inlet and the air outlet with no obstructions to airflow.
The surrounding area must be free from the possibility of flammable gas leakage.
Install units, power cords and inter-connecting cables at least 10 feet away from television and radio sets. This is to prevent interference
to images and sounds. (Noises may be heard even if they are more than 10 feet away depending on radio wave conditions.)
8) In coastal areas or other places with salty atmosphere of sulfate gas, corrosion may shorten the life of the air conditioner.
9) Do not place moisture sensitive equipment or articles under the outdoor unit condenstate drain.
Do not install unit by hanging from a ceiling or stacking units.
When operating the air conditioner in a outdoor temperature below, be sure to
follow the instructions described below.
1) To prevent exposure to wind, install the outdoor unit with its suction side facing the wall.
2) Never install the outdoor unit at a site where the suction side may be exposed directly to wind.
3) To prevent exposure to wind, it is recommended to install a baffle plate on the
air discharge side of the outdoor unit.
4) In heavy snowfall areas, select an installation site where the snow will not affect the unit.
• Construct a large
• Construct a
Install the unit high
enough off the
ground to prevent
burying in snow.
Precautions on Installation
• Ensure the strength and level of the installation will not cause any operating vibration or noise after installed.
• In accordance with the foundation drawing, fix the unit securely by means of the foundation bolts. (Prepare
four sets of 3/8” or 7/16” foundation bolts, nuts and washers each which are available on the market.)
• It is best to screw in the foundation bolts until their length are 3/4” from the foundation surface.
Outdoor Unit Installation Drawings
09 / 12 class
Max. allowable length
65 ft
Max. allowable height
49 ft
Additionl refrigerant
required for refrigerant
pipe exceeding
33 ft in length.
0.22 oz/ft
Gas pipe
O.D. 3/8”
Liquid pipe
O.D. 1/4”
Wrap the insulation pipe with
the finishing tape from bottom
to top.
* Be sure to add the proper amount of
additional refrigerant.
Failure to do so may result in reduced
Stop valve cover
n How to remove the stop valve cover.
from wall
• Remove the screw on the
stop valve cover.
• Slide the lid downward to
remove it.
n How to attach the stop valve cover.
Fo 2-1/
ce ot b 4
ntr olt
es -ho
• Insert the upper part of the
stop valve cover into the
outdoor unit to install.
• Tighten the screws.
In sites with poor drainage, use
block bases for outdoor unit.
Adjust foot height until the unit is
leveled. Otherwise, water leakage
or pooling of water may occur.
Allow space for piping
and electrical servicing.
(Foot b
Unit: inch
Where there is a danger of the unit
falling, use foot bolts, or wires.
Installation Guidelines
• Where a wall or other obstacle is in the path of outdoor unit’s intake or exhaust airflow, follow the installation
guidelines below.
• For any of the below installation patterns, the wall height on the exhaust side should be 4 ft or less.
Wall facing one side
More than 1-15/16
Walls facing two sides
Walls facing three sides
More than 3-15/16
More than 5-7/8
than 3-15/16
or less
More than 1-15/16
More than 1-15/16
Side view
More than 5-7/8
More than 1-15/16
Top view
More than 11-13/16
Top view
Unit: inch
Outdoor Unit Installation (1)
Installing Outdoor Unit
1) When installing the outdoor unit, refer to “Precautions for Selecting the Location” and the “Outdoor
Unit Installation Drawings.”
2) If drain work is necessary, follow the procedures below.
Drain Work
1) Use drain plug for drainage.
2) If the drain port is covered by a mounting base or floor surface, place
additional foot bases of at least 1-1/4” inch height under the outdoor unit’s feet.
3) In cold areas, do not use a drain hose with the outdoor unit.
(Otherwise, drain water may freeze, impairing heating performance.)
Drain-water hole
Bottom frame
Drain plug
Hose (available commercially,
inner dia. 5/8inch)
Flaring the Pipe End
(Cut exactly at
right angles.)
1) Cut the pipe end with a pipe cutter.
2) Remove burrs with the cut surface
facing downward so that the chips do
not enter the pipe.
3) Put the flare nut on the pipe.
4) Flare the pipe.
5) Check that the flaring is properly made.
Remove burrs
Set exactly at the position shown below.
Flare tool for R410A
Conventional flare tool
Clutch-type (Rigid-type) Wing-nut type (Imperial-type)
Flare’s inner
surface must
be flaw-free.
The pipe end must
be evenly flared in
a perfect circle.
Make sure that the
flare nut is fitted.
Do not use mineral oil on flared part.
Prevent mineral oil from getting into the system as this would reduce the unit life.
Never use piping which has been used for previous installations. Only use parts which are provided with the unit.
Do never install a refrigerant drier to this unit.
The drying material may dissolve and damage the system.
Incomplete or improper flaring may cause refrigerant gas leakage.
Refrigerant Piping
1) Use the flare nut fixed to the main unit. (To prevent cracking of the flare nut by aged deterioration.)
2) To prevent gas leakage, apply refrigeration oil only to the inner surface of the flare. (Use refrigeration oil
for R410A.)
3) Use torque wrenches when tightening the flare nuts to prevent damage to the flare nuts and gas leakage.
Align the centers of both flares and tighten the flare nuts 3 or 4 turns by hand. Then tighten them fully
with the torque wrenches.
[Apply oil]
Do not apply refrigeration
oil to the outer surface.
Apply refrigeration oil to the
inner surface of the flare.
Torque wrench
Flare nut
Piping union
Do not apply refrigeration oil to the flare
nut avoid tightening with over torque.
Flare nut tightening torque
Gas side
Liquid side
3/8 inch
1/4 inch
24.1-29.4ft • Ibf
10.4-12.7ft • Ibf
Flare nut
Valve cap tightening torque
Gas side
Liquid side
3/8 inch
1/4 inch
15.9-20.2ft • Ibf
15.9-20.2ft • Ibf
Service port cap
tightening torque
7.9-10.8ft • Ibf
Outdoor Unit Installation (2)
Purging Air and Checking for Gas Leakage
• When the piping work is completed, it is necessary to purge the air and check for gas leakage.
1) Do not place any substance other than the specified refrigerant (R410A) into the refrigeration cycle.
2) When a refrigerant gas leak occurs, ventilate the room as soon and as much as possible.
3) R410A, as well as other refrigerants, should always be recovered and never be released directly into
the environment.
4) Use a vacuum pump for R410A exclusively. Using the same vacuum pump for different refrigerants
may damage the vacuum pump or the unit.
• If adding additional refrigerant, perform air purging from the
refrigerant pipes and indoor unit using a vacuum pump before
charging additional refrigerant.
• Use a hexagonal wrench (3/16”) to operate the stop valve rod.
• All refrigerant pipe joints should be tightened with a torque
wrench to the specified tightening torque.
pressure gauge meter
Valve caps
Vacuum pump
Service port
Gas stop valve
1) Connect projection side of charging hose (which comes from gauge manifold) to gas stop valve’s service port.
2) Fully open gauge manifold’s low-pressure valve (Lo) and completely close its high-pressure valve (Hi).
(High-pressure valve subsequently requires no operation.)
3) Do vacuum pumping and make sure that the vacuum pressure gauge reads – 29.9 inHg *1.
4) Close gauge manifold's low-pressure valve (Lo) and stop vacuum pump.
(Keep this state for a few minutes to make sure that the vacuum pressure gauge pointer does not swing back.)*2.
5) Remove valve caps from liquid stop valve and gas stop valve.
6) Turn the liquid stop valve’s rod 90 degrees counterclockwise with a hexagonal wrench to open valve.
Close it after 5 seconds, and check for gas leakage.
Using soapy water, check for gas leakage from indoor unit’s flare and outdoor unit’s flare and valve rods.
After the check is complete, wipe all soapy water off.
7) Disconnect charging hose from gas stop valve’s service port, then fully open liquid and gas stop valves.
(Do not attempt to turn valve rod beyond its stop.)
8) Tighten valve caps and service port caps for the liquid and gas stop valves with a torque wrench at the specified torques.
*1. Pipe length vs. vacuum pump run time
Pipe length
Up to 50 feet
More than 50 feet
Run time
Not less than 10 min.
Not less than 15 min.
*2. If the vacuum pressure gauge pointer swings back, refrigerant may have water content or a loose pipe
joint may exists. Check all pipe joints and retighten nuts as needed, then repeat steps 2) through 4).
Outdoor Unit Installation (3)
Refilling The Refrigerant
Filling a cylinder with an
Filling other cylinders
Check the type of refrigerant to be used on the machine
attached siphon
Turn the cylinder
Stand the cylinder upright when filling.
upside-down when
There is a siphon pipe inside,
Precautions when adding R410A
so the cylinder need not be
Fill from the liquid pipe in liquid form.
upside-down to fill with liquid.
It is a mixture of refrigerant, so adding it in gas form may cause the
refrigerant composition to change, preventing normal operation.
1) Before filling, check whether the cylinder has a siphon attached or not. (It should have something like “liquid filling
siphon attached” displayed on it.)
• Be sure to use the R410A tools to ensure pressure and to prevent foreign objects entering.
Refrigerant Piping Work
7-1 Cautions on Pipe Handling
1) Protect the open end of the pipe against dust and moisture.
2) All pipe bends should be as gentle as possible. Use a pipe bender for bending.
Selection of Copper and Heat Insulation materials
When using commercial copper pipes and fittings, observe the following:
1) Insulation material: Polyethylene foam
Heat transfer rate: 0.041 to 0.052 W/mK (0.024-0.030 Btu/fth˚F)
Refrigerant gas pipe’s surface temperature reaches 230˚F max.
Choose heat insulation materials that will withstand this temperature.
2) Be sure to insulate both the gas and liquid piping and to provide insulation dimensions as below.
Gas side
09/12 class
O.D. 3/8 inch
Liquid side
Gas pipe thermal insulation
O.D. 1/4 inch
09/12 class
Liquid pipe
thermal insulation
I.D. 0.472-0.590 inch
I.D. 0.315-0.393 inch
If no flare cap is
available, cover the
flare mouth with
tape to keep dirt or
water out.
Inter-unit wiring
Gas pipe
Gas pipe
Minimum bend radius
1-3/16 inch or more
Be sure to
place a cap.
Thickness 0.393 inch Min.
Liquid pipe
Liquid pipe
Finishing tape
Drain hose
Thickness 0.031 inch (C1220T-O)
3) Use separate thermal insulation pipes for gas and liquid refrigerant pipes.
Pump Down Operation
In order to protect the environment, be sure to pump down
when relocating or disposing of the unit.
Remove the valve cap from liquid stop valve and gas stop valve.
Carry out forced cooling operation.
After 5 to 10 minutes, close the liquid stop valve with a hexagonal wrench.
After 2 to 3 minutes, close the gas stop valve and stop forced cooling operation.
How to force cooling operation mode
Liquid stop valve
Gas stop
Valve cap
Using the indoor unit operation/stop button
Press the indoor unit operation/stop button for at least 5 seconds. (Operation will start.)
• Forced cooling operation will stop automatically after around 15 minutes.
To force a test run to stop, press the indoor unit operation/stop button.
Using the main unit’s remote control
1) Press the “operation/stop” button. (Operation will start.)
2) Press the temperature
button and the “operation select” button at the same time.
3) Press the “operation select” button twice. ( will be displayed and the unit will enter test run mode.)
4) Press the “operation select” button to return the operation mode to cooling.
• Test run mode will stop automatically after around 30 minutes. To force a test run to stop, press the operation/stop button.
After closing the liquid stop valve, close the gas stop valve within 3 minutes, then stop the forced operation.
1) Do not use spliced wires, stranded wires, extension cords, or starburst connections, as they may cause
overheating, electrical shock, or fire. Follow all Local, and State electrical codes.
2) Do not use locally purchased electrical parts inside the product. (Do not overload the circuit by adding
drain pump or other electrical equipment to unit terminals.) Doing so may cause electric shock or fire.
3) Be sure to install an earth leak detector. (One that can handle higher harmonics.)
(This unit uses an inverter, which means that it must be used an earth leak detector capable handling
harmonics in order to prevent malfunctioning of the earth leak detector itself.)
4) When carrying out wiring connection, take care not to pull at the conduit.
5) Do not connect the power wire to the indoor unit. Doing so may cause electric shock or fire.
• Do not turn ON the safety breaker until all work is completed.
1) Strip the insulation from the wire (3/4 inch).
When wire length exceeds
2) Connect the connection wires between the
33ft, use AWG14 wires.
indoor and outdoor units so that the terminal
numbers match. Tighten the terminal screws
securely. We recommend a flathead screwdriver
be used to tighten the screws.
The screws are packed with the terminal board.
Outdoor unit
1 23
L1 L2
Earth leakage
circuit breaker
60Hz 208/230V
Use AWG16 or AWG14 wire
for the Interconnecting wires.
Power supply
terminal block
Shape wires so
that the service
lid and stop
valve cover fit
Use the specified wire type and
connect it securely.
Lock nut
Observe the notes mentioned below when wiring to the power
supply terminal board.
Round crimp-style
Precautions to be taken for power supply wiring.
(Use a round crimp-style terminal for connection to the power terminal
supply terminal board. In case it cannot be used due to
unavoidable reasons, be sure to observe the following instruction.)
Strand Wire
When connecting the connection wires to the terminal board using a single core wire, be sure to perform curling.
Problems with the work may cause heat and fires.
Strip wire end
to this point.
Excessive strip length
may cause electrical
shock or leakage.
Stripping wire at terminal block
3) Pull the wire and make sure that it is tight. Then fix the wire in place with a strain relief.
Run Test and Final Check
Trial Operation and Testing.
1-1 Measure the supply voltage and make sure that it falls in the specified range.
1-2 Trial operation should be carried out in either cooling or heating mode.
• In cooling mode, select the lowest programmable temperature; in heating mode, select the highest
programmable temperature.
1) Trial operation may be disabled in either mode depending on the room temperature.
2) After trial operation is complete, set the temperature to a normal level (78˚F to 82˚F in cooling mode, 68˚F to
75˚F in heating mode).
3) For protection, the unit disables restart operation for 3 minutes after it is turned off.
1-3 Carry out the test operation in accordance with the Operation Manual to ensure that all functions
and parts, such as louver movement, are working properly.
• The air conditioner requires a small amount of power in its standby mode. If the system is not to be used for
some time after installation, shut off the circuit breaker to eliminate unnecessary power consumption.
• If the circuit breaker trips to shut off the power to the air conditioner, the system will restore the original
operation mode when the circuit breaker is opened again.
Test Items.
Test Items
(diagnostic display on RC)
Indoor and outdoor units are installed properly on
solid bases.
Fall, vibration, noise
No refrigerant gas leaks.
Incomplete cooling/heating function
Refrigerant gas and liquid pipes and indoor drain
hose extension are thermally insulated.
Water leakage
Drain line is properly installed.
Water leakage
System is properly ground to earth.
Electrical leakage
The specified wires are used for interconnecting
wire connections.
Inoperative or burn damage
Indoor or outdoor unit’s air intake or exhaust has
clear path of air.
Stop valves are opened.
Incomplete cooling/heating function
Indoor unit properly receives remote control
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