daikin air conditioner
3P235796-1F M08B133E
Two-dimensional bar code
is a code for manufacturing.
Safety Precautions (1)
• 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 connection.
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.
Safety Precautions (2)
• 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 inter-unit wire 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.)
• 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 refrigerant pipes are 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.
• 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.
• The temperature of refrigerant circuit will be high, please keep the inter-unit wire away from copper pipes that are not
thermally insulated.
• Electrical work must be performed in accordance with the NEC/CEC by authorized personnel only.
Accessories supplied with the outdoor unit:
(A) Installation manual
(C) Tube
(D) Binding band
(B) Drain socket assy
Precautions for Selecting the Location
1) Choose a place solid enough to bear the weight and vibration of the unit, where the operation noise will
not be amplified.
2) Choose a location where the hot air discharged from the unit or the operation noise will not cause a
nuisance to the neighbors of the user.
3) Avoid places near a bedroom and the like, so that the operation noise will cause no trouble.
4) There must be sufficient spaces for carrying the unit into and out of the site.
5) There must be sufficient space for air passage and no obstructions around the air inlet and the air outlet.
6) The site must be free from the possibility of flammable gas leakage in a nearby place.
7) Install units, power cords and inter-unit wire at least 10ft (3m) 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 10ft (3m)
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) Since drain flows out of the outdoor unit, do not place under the unit anything which must be kept away
from moisture.
Cannot be installed hanging from ceiling or stacked.
When operating the air conditioner in a low outdoor ambient
temperature, 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 canopy.
Construct a pedestal.
Install the unit high enough off the
ground to prevent burying in snow.
Precautions on Installation
• Check the strength and level of the installation ground so that the unit 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 1/2 inch (M12) 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 inch (20mm) from the foundation surface.
Outdoor Unit Installation Drawings
30/36 class
Max. allowable length
98.4ft (30m)
Min. allowable length
6.6ft (2m)
Max. allowable height
65.6ft (20m)
Additional refrigerant
required for refrigerant
pipe exceeding 32ft
(10m) in length.
Gas pipe
O.D. 5/8 inch (15.9mm)
Liquid pipe
O.D. 3/8 inch (9.5mm)
Wrap the insulation
pipe with the finishing
tape from bottom to top.
Allow 11-13/16 inch (300mm)
of work space below the
ceiling surface.
Set the piping length
from 6.6ft (2m) to 98.4ft (30m).
* Be sure to add the proper amount of additional refrigerant.
Failure to do so may result in reduced performance.
9-7/8” (250mm) from
Allow space for piping
and electrical servicing.
If there is the danger of the unit falling
or overturning, fix the unit with
foundation bolts, or with wire or other
Right side plate
If the location does not have good
drainage, place the unit on a level
mounting base (or a plastic pedestal).
Install the outdoor unit in a level
position. Failure to do so may result in
water leakage or accumulation.
8” )
-5/ m
13 45m
t s
oo re
(F ent
Also insulate the connection on the outdoor unit.
Clamping material
Level mounting base
(available separately)
Insulation tube
Bottom frame
Use tape or insulating material on all connections
to prevent air from getting in between the copper
piping and the insulation tube.
Be sure to do this if the outdoor unit is installed
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 47-1/4 inch
(1200mm) or less.
Wall facing one side
More than 3-15/16”
Walls facing two sides
Walls facing three sides
More than 13-3/4” (350mm)
or less
More than 1-15/16”
Side view
More than
Top view
More than 3-15/16”
More than 13-3/4”
More than 1-15/16”
More than 1-15/16”
Top view
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.
• Use drain plug for drainage.
• If the drain port is covered by a mounting base or floor surface, place additional foot bases of at least
3-15/16 inch (100mm) in height under the outdoor unit’s feet.
• In cold areas, do not use a drain socket (A), drain caps (B) and a drain hose with the outdoor unit.
(Otherwise, drain water may freeze, impairing heating performance.)
1) Insert drain receiver (C) onto drain socket (A) and drain cap (B)
beyond 4 projections around drain socket and drain cap.
2) Insert drain socket and drain caps into their matching drain hole;
Drain socket (A) into drain hole I and drain caps (B) into drain
hole II and III. After insertion, turn them about 40˚ clockwise.
(A) Drain socket
(B) Drain cap
(Be sure not to insert them into wrong drain
holes, or there causes water leakage.)
(View from bottom)
(C) Drain receiver
Check that the drain receiver (C) is correctly engaged with the projections of the drain socket (A) and
drain cap (B). Otherwise, water leakage may result.
(4 points)
(4 points)
3) Connect vinyl hose on the market (internal diameter of 1 inch (25mm)) to drain socket (A).
(If the hose is too long and hangs down, fix it carefully to prevent the kinks.)
4) Make sure that there is no water leakage from portion I, II, or III.
If the drain holes of the outdoor unit are covered with the mounting bracket or the floor, raise the unit to
provide the space of more than 3-15/16 inch (100mm) under the leg of the outdoor unit.
Outdoor Unit Installation (2)
Flaring the pipe end.
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.
Set exactly at the position shown below.
Flare tool for R410A
Wing-nut type
0-0.020 inch
0.039-0.059 inch
0.059-0.079 inch
Conventional flare tool
(Cut exactly at
right angles.)
Flare’s inner
surface must
be flaw-free.
Remove burrs
The pipe end must
be evenly flared in a
perfect circle.
Make sure that the
flare nut is fitted.
1) Do not use mineral oil on flared part.
2) Prevent mineral oil from getting into the system as this would reduce the lifetime of the units.
3) Never use piping which has been used for previous installations. Only use parts which are delivered with
the unit.
4) Do never install a drier to this R410A unit in order to guarantee its lifetime.
5) The drying material may dissolve and damage the system.
6) Incomplete 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
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.
Do not apply refrigeration
oil to the flare nut avoid
tightening with over torque.
Flare nut tightening torque
Gas side
Liquid side
5/8 inch(15.9mm) 3/8 inch(9.5mm)
45.6-55.6ft • lbf
24.1-29.4ft • lbf
(61.8-75.4N • m) (32.7-39.9N • m)
Valve cap tightening torque
Gas side
Liquid side
5/8 inch(15.9mm) 3/8 inch(9.5mm)
35.5-44.0ft • lbf
15.9-20.2ft • lbf
(48.1-59.7N • m) (21.6-27.4N • m)
Service port cap tightening torque
7.9-10.8ft • lbf (10.8-14.7N • m)
Outdoor Unit Installation (3)
Purging air and checking gas leakage.
• When piping work is completed, it is necessary to purge the air and check for gas leakage.
1) Do not mix any substance other than the specified refrigerant (R410A) into the refrigeration cycle.
2) When refrigerant gas leaks occur, 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 using additional refrigerant, perform air purging from the refrigerant pipes and indoor unit using a
vacuum pump, then charge additional refrigerant.
• Use a hexagonal wrench (3/16 inch (4mm)) to operate the stop valve rod.
• All refrigerant pipe joints should be tightened with a torque wrench at the specified tightening torque.
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 compound pressure gauge reads – 29.9inHg (– 0.1MPa).*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 compound 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 49.2ft (15m)
More than 49.2ft (15m)
Run time
Not less than 10 min.
Not less than 15 min.
*2. If the compound 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 (4)
Refilling the refrigerant.
Check the type of refrigerant to be used on the machine nameplate.
Precautions when adding R410A
Fill from the liquid pipe in liquid form.
It is a mixed 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.)
Filling a cylinder with an
attached siphon
Filling other cylinders
Stand the cylinder upright
when filling.
Turn the cylinder
upside-down when filling.
There is a siphon pipe
inside, so the cylinder
need not be upsidedown to fill with liquid.
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.
If no flare cap is
available, cover the
flare mouth with
tape to keep dirt or
water out.
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.
7-2 Selection of copper and heat insulation materials.
Inter-unit wire
Gas pipe
When using commercial copper pipes and fittings, observe the following:
1) Insulation material: Polyethylene foam
Heat transfer rate: 0.041 to 0.052W/mK (0.024 to 0.030Btu/fth˚F (0.035 to 0.045kcal/mh˚C))
Refrigerant gas pipe’s surface temperature reaches 230˚F (110˚C) max.
Choose heat insulation materials that will withstand this temperature.
Gas pipe
2) Be sure to insulate both the gas and liquid piping and to provide insulation
dimensions as below.
Finishing tape
Gas side
Liquid side
O.D. 5/8 inch (15.9mm)
O.D. 3/8 inch (9.5mm)
Minimum bend radius
1-15/16 inch (50mm) or more
Be sure to
place a cap.
Gas pipe thermal insulation
Liquid pipe
Liquid pipe
Drain hose
Liquid pipe thermal insulation
I.D. 0.630-0.787 inch (16-20mm) I.D. 0.472-0.591 inch (12-15mm)
Thickness 0.393 inch (10mm) Min.
1-3/16 inch (30mm) or more
Thickness 0.039 inch (1.0mm) (C1220T-O) Thickness 0.031 inch (0.8mm) (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.
1) Remove the valve cap from liquid stop valve and gas stop valve.
2) Carry out forced cooling operation.
3) After 5 to 10 minutes, close the liquid stop valve with a
hexagonal wrench.
4) After 2 to 3 minutes, close the gas stop valve and stop forced
cooling operation.
Service port
Gas stop valve
Liquid stop valve
valve cap
Forced cooling operation
1) Press the Forced Operation switch (SW1) to begin forced cooling. Press the Forced Operation switch (SW1) again
to stop forced cooling.
Wiring (1)
1) Do not use spliced wires, stranded wires (CAUTION (1)), 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 branch the power for the drain
pump, etc., from the terminal block.) 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) Use an all-pole disconnection type breaker with at least 1/8 inch (3mm) between the contact point gaps.
5) When carrying out wiring connection, take care not to pull at the conduit.
6) Do not connect the power wire to the indoor unit. Doing so may cause electric shock or fire.
<Method of Mounting Conduit>
Pass wires through the conduit and secure them with a lock nut.
Lock nut
Wire retainer
Service port
Conduit mounting plate
Conduit mounting plate
Wiring (2)
• Do not turn ON the safety breaker until all
work is completed.
1) Strip the insulation from the wire (3/4 inch
2) Connect the connection wires between the
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
Firmly fix the wires with
the terminal screws.
Outdoor unit
1 23
If the length of a connection wire is
33ft (10m) or more, use AWG14 wire.
L1 L2
Use AWG 14 wires.
Earth leakage
circuit breaker
Power supply
60Hz 208-230V
Use AWG 16 or AWG 14 wire
for inter-unit wiring.
Power supply terminal block
(D) Binding band
(C) Tube
Secure the wires firmly
using the binding band, as
shown in the figure.
Secure firmly, making sure
no outside pressure is
exerted on the terminals.
• Use the specified wires and
connect them securely.
• Shape the wires so that there
is no lifting of the service hatch
or other structural parts.
Observe the notes mentioned below when wiring to the power supply terminal board.
Precautions to be taken for power supply wiring.
Use a round crimp-style terminal for connection to the power supply terminal board.
In case it cannot be used due to unavoidable reasons, be sure to observe the following
Place the round crimp-style terminals on the wires up to the covered part and
secure in place.
Round crimp-style
Stranded wire
• Ground terminal installation
Use the following method when installing
the round crimp-style terminal.
Round crimpstyle terminal
Flat washer
Round crimpstyle terminal
Flat washer
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.
Stripping wire at terminal block
3) Pull the wire and make sure that it does not disconnect. Then fix the wire in place with a wire stop.
Facility Setting Switch (cooling at low outdoor temperature)
This function is limited only for facilities (the target of air conditioning is equipment (such as computer)).
Never use it in a residence or office (the space where there is a human).
1) You can expand the operation range to 5˚F (–15˚C) by turning on switch B (SW4) on the PCB. If the
outdoor temperature falls to – 4˚F (–20˚C) or lower, the operation will stop. If the outdoor temperature rises,
the operation will start again
Turn on
switch B.
1) If the outdoor unit is installed where the heat exchanger of the unit is exposed to direct wind, provide a
windbreak wall.
2) Intermittent noises may be produced by the indoor unit due to the outdoor fan turning on and off when
using facility settings.
3) Do not place humidifiers or other items which might raise the humidity in rooms where facility settings
are being used. A humidifier might cause dew jumping from the indoor unit outlet vent.
4) Use the indoor unit at the highest level of air flow rate.
Trial Operation and Testing
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.
For heat pump
1) In cooling mode, select the lowest programmable temperature; in heating mode, select the highest
programmable temperature.
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 (26˚C to 28˚C) in
cooling mode, 68˚F to 75˚F (20˚C to 24˚C) in heating mode).
• For protection, the unit disables restart operation for 3 minutes after it is turned off.
For cooling only
• Select the lowest programmable temperature.
1) Trial operation in cooling mode may be disabled depending on the room temperature.
2) After trial operation is complete, set the temperature to a normal level (78˚F to 82˚F (26˚C to 28˚C)).
3) For protection, the system 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, 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
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
Draining line is properly installed.
Water leakage
System is properly ground to earth.
Electrical leakage
The specified wires are used for inter-unit wiring.
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 controller
3P235796-1F M08B133E
Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF