DAIKIN FXMQ30MVJU, FXMQ36MVJU, FXMQ48MVJU, FXSQ12MVJU, FXSQ30MVJU INSTALLATION MANUAL
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SYSTEM Inverter Air Conditioners
MODELS
Ceiling-mounted Duct type
FXMQ30MVJU
FXMQ36MVJU
FXMQ48MVJU
Ceiling-mounted Built-in type
FXSQ12MVJU FXSQ30MVJU
FXSQ18MVJU FXSQ36MVJU
FXSQ24MVJU FXSQ48MVJU
INSTALLATION MANUAL
Read these instructions carefully before installation.
Keep this manual in a handy place for future reference.
This manual should be left with the equipment owner.
SAFETY CONSIDERATIONS 2
BEFORE INSTALLATION 3
SELECTING INSTALLATION SITE 4
PREPARATIONS BEFORE INSTALLATION 5
INDOOR UNIT INSTALLATION 5
REFRIGERANT PIPING WORK 6
DRAIN PIPING WORK 7
ELECTRIC WIRING WORK 7
WIRING EXAMPLE AND HOW TO SET THE REMOTE CON-
TROLLER 8
SELECTING INSTALLATION SITE 11
PREPARATIONS BEFORE INSTALLATION 11
INDOOR UNIT INSTALLATION 12
REFRIGERANT PIPING WORK 12
DRAIN PIPING WORK 14
ELECTRIC WIRING WORK 15
WIRING EXAMPLE AND HOW TO SET THE REMOTE CON-
TROLLER 16
FIELD SETTING 19
TEST OPERATION 19
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VRV SYSTEM Inverter Air Conditioners Installation manual
CONTENTS
1. SAFETY CONSIDERATIONS ......................................... 2
2. BEFORE INSTALLATION ............................................... 3
FXMQ30/36/48MVJU
3.SELECTING INSTALLATION SITE................................ 4
4.PREPARATIONS BEFORE INSTALLATION ................. 5
5.INDOOR UNIT INSTALLATION ..................................... 5
6.REFRIGERANT PIPING WORK .................................... 6
7.DRAIN PIPING WORK................................................... 7
8.ELECTRIC WIRING WORK ........................................... 7
9.WIRING EXAMPLE AND HOW TO SET
THE REMOTE CONTROLLER ...................................... 8
FXSQ12/18/24/30/36/48MVJU
3.SELECTING INSTALLATION SITE ............................. 11
4.PREPARATIONS BEFORE INSTALLATION ............... 11
5.INDOOR UNIT INSTALLATION ................................... 12
6.REFRIGERANT PIPING WORK .................................. 12
7.DRAIN PIPING WORK................................................. 14
8.ELECTRIC WIRING WORK ......................................... 15
9.WIRING EXAMPLE AND HOW TO SET
THE REMOTE CONTROLLER .................................... 16
COMMON ITEM
10. FIELD SETTING............................................................ 19
11. TEST OPERATION ....................................................... 19
1. SAFETY CONSIDERATIONS
Please read these “SAFETY CONSIDERATIONS” carefully
before installing air conditioning equipment and be sure to
install it correctly. After completing the installation, make sure
that the unit operates properly during the start-up operation.
Please instruct the customer on how to operate the unit and
keep it maintained.
Also, inform customers that they should store this installation
manual along with the operation manual for future reference.
This air conditioner comes under the term “appliances not
accessible to the general public”.
Meaning of warning, caution and note symbols.
WARNING ............ Indication a potentially hazardous sit-
uation which, if not avoided, could
result in death or serious injury.
CAUTION ............. Indication a potentially hazardous sit-
uation which, if not avoided, may
result in minor or moderate injury. It
may also be sued to alert against
unsafe practices.
NOTE .................... Indication situation that may result in
equipment or property-damage-only
accidents.
WARNING
• Ask your dealer or qualified personnel to carry out
installation work. Do not try to install the machine by
yourself.
Improper installation may result in water leakage, electric
shocks or fire.
• Perform installation work in accordance with this
installation manual.
Improper installation may result in water leakage, electric
shocks or fire.
• When installing the unit in a small room, take mea-
sures against to keep refrigerant concentration from
exceeding allowable safety limits in the event of refrigerant leakage.
Contact the place of purchase for more information. Excessive
refrigerant in a closed ambient can lead to oxygen deficiency.
• Be sure to use only the specified accessories and
parts for installation work.
Failure to use the specified parts may result in water leakage,
electric shocks, fire or the unit falling.
• Install the air conditioner on a foundation strong
enough to withstand the weight of the unit.
A foundation of insufficient strength may result in the equipment falling and causing injuries.
• Carry out the specified installation work after taking
into account strong winds, typhoons or earthquakes.
Improper installation work may result in the equipment falling
and causing accidents.
• Make sure that a separate power supply circuit is pro-
vided for this unit and that all electrical work is carried
out by qualified personnel according to local laws and
regulations and this installation manual.
An insufficient power supply capacity or improper electrical
construction may lead to electric shocks or fire.
• Make sure that all wiring is secured, the specified
wires and used, and no external forces act on the terminal connections or wires.
Improper connections or installation may result in fire.
• When wiring the power supply and connecting the
remote controller wiring and transmission wiring,
position the wires so that the electric parts box lid can
be securely fastened.
Improper positioning of the electric parts box lid may result in
electric shocks, fire or the terminals overheating.
• If the refrigerant gas leaks during installation, ventilate
the area immediately.
Toxic gas may be produced if the refrigerant gas comes into
contact with fire.
• After completing the installation work, check that the
refrigerant gas does not leak.
Toxic gas may be produced if the refrigerant gas leaks into
the room and comes into contact with a source of fire, such
as a fan heater, stove or cooker.
• Before touching electrical parts, turn off the unit.
• Ground the air conditioner. Do not connect the ground
wire to gas or water pipes, lightning rod or a telephone
ground wire.
Incomplete grounding may result in electric shocks.
• Do not touch the switch with wet fingers.
Touching a switch with wet fingers can cause electric shock.
• Install an leak circuit breaker, as required.
If an leak circuit breaker is not installed, electric shock may
result.
2
• Do not install the air conditioner in the following loca-
tions:
(a) where a mineral oil mist or an oil spray or vapor is produced, for example in a kitchen Plastic parts may deteriorate
and fall off or result in water leakage.
(b) where corrosive gas, such as sulfurous acid gas, is produced Corroding copper pipes or soldered parts may result
in refrigerant leakage.
(c) near machinery emitting electromagnetic waves Electromagnetic waves may disturb the operation of the control system and result in a malfunction of the equipment.
(d) where flammable gases may leak, where there are carbon fiber or ignitable dust suspensions in the air, or where
volatile flammables such as thinner or gasoline are handled.
Operating the unit in such conditions may result in fire.
CAUTION
• While following the instructions in this installation manual, install drain piping in order to ensure proper drainage and insulate piping in order to prevent
condensation.
Improper drain piping may result in water leakage and property damage.
• 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.
• 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. If children play with a plastic
bag which was not torn apart, they face the risk of suffocation.
• Do not turn off the power immediately after stopping
operation.
Always wait at least five minutes before turning off the power.
Otherwise, water leakage and trouble may occur.
NOTE
• Install the indoor and outdoor units, power supply wiring and connecting wires at least 3.5ft. away from televisions or radios in order to prevent image interference or
noise.
(Depending on the radio waves, a distance of 3.5ft. may not
be sufficient enough to eliminate the noise.)
• Remote controller (wireless kit) transmitting distance
can result shorter than expected in rooms with electronic fluorescent lamps. (inverter or rapid start types)
Install the indoor unit as far away from fluorescent lamps as
possible.
• This unit is a class A product.
In a domestic environment this product may cause radio
interference in which case the user may be required to take
adequate measures.
• Dismantling of the unit, treatment of the refrigerant, oil
and eventual other parts, should be done in accordance
with the relevant local and national regulations.
• Be sure to check the type of R410A refrigerant to be used
before installing the unit. (Using an incorrect refrigerant will
prevent normal operation of the unit.)
• The accessories needed for installation must be retained in
your custody until the installation work is completed. Do not
discard them!
• Decide upon a line of transport.
• Leave the unit inside its packaging while moving, until reaching the installation site. Where unpacking is unavoidable, use
a sling of soft material or protective plates together with a
rope when lifting, to avoid damage or scratches to the unit.
• When moving the unit at or affter opening, hold the unit by
the hanger brackets (× 4). Do not apply force to the refrigerant piping, drain piping or plastic parts.
• For the installation of an outdoor unit, refer to the installation
manual attached to the outdoor unit.
• Do not install or operate the unit in rooms mentioned below.
• Laden with mineral oil, or filled with oil vapor or spray
like in kitchens. (Plastic parts may deteriorate which
could eventually cause the unit to fall out of place, or
could lead to leaks.)
• Where corrosive gas like sulfurous gas exists. (Cop-
per tubing and brazed spots may corrode which could
eventually lead to refrigerant leaks.)
• Where exposed to combustible gases and where vol-
atile flammable gas like thinner or gasoline is used.
(Gas in the vicinity of the unit could ignite.)
• Where machines can generate electromagnetic
waves. (Control system may malfunction.)
• Where the air contains high levels of salt such as that
near the ocean and where voltage fluctuates greatly
such as that in factories.
Also in vehicles or vessels.
•
This unit, both indoor and outdoor, is suitable for installation in a
commercial and light industrial environment.
If installed as a household appliance it could cause electromagnetic interference.
NOTE
• Be sure to read this manual before installing the indoor unit.
• Entrust installation to the place of purchase or a qualified serviceman. Improper installation could lead to leaks and, in
worse cases, electric shock of fire.
• Use only parts provided with the unit or parts satisfying
required specifications. Unspecified parts could cause the
unit to fall out of place, or could lead to leaks and, in worse
cases, electric shock or fire.
• Be sure to mount an air filter (part to be procured in the field)
in the suction air passage in order to prevent water leaking,
etc.
2. BEFORE INSTALLATION
•
When moving the unit while removing it from the carton
box, be sure to lift it by holding on to the four lifting lugs
without exerting any pressure on other parts, especially,
the refrigerant piping, drain piping, and other resin parts
.
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FXMQ30MVJU FXMQ48MVJU
FXMQ36MVJU
2-1 ACCESSORIES
Check the following accessories are included with your
unit.
Name
Quantity 1 pc. 1 pc. 1 each. 1 each.
Shape
Name Clamp Screws for duct flanges
Quantity 6 pcs. As described in table below
Shape
Metal
clamp
Drain
hose
Insulation for
fitting
for gas pipe
for liquid pipe
Sealing pad
Large
Mid
(Other)
• Operation
manual
• Installation
manual
• Washers
for hanger
bracket
(8 pcs.)
2-2 OPTIONAL ACCESSORIES
Table 1
Remote controller
Wired type BRC1C71
FOR THE FOLLOWING ITEMS, TAKE SPECIAL
CARE DURING CONSTRUCTION AND CHECK
AFTER INSTALLATION IS FINISHED.
a. Items to be checked after completion of work
Items to be checked
Are the indoor and outdoor unit
fixed firmly?
Is the gas leak test finished?
Is the unit fully insulated? Condensate water may drip.
Does drainage flow smoothly? Condensate water may drip.
Does the power supply voltage
correspond to that shown on
the name plate?
Are wiring and piping correct?
Is the unit safely grounded? Dangerous at electric leakage.
Is wiring size according to
specifications?
Is something blocking the air
outlet or inlet of either the
indoor or outdoor units?
Are refrigerant piping length
and additional refrigerant
charge noted down?
If not properly done, what is
likely to occur.
The units may drop, vibrate or
make noise.
It may result in insuffcient cooling.
The unit may malfunction or
the components burn out.
The unit may malfunction or
the components burn out.
The unit may malfunction or
the components burn out.
It may result in insufficient cooling.
The refrigerant charge in the
system is not clear.
Check
b. Items to be checked at time of delivery
Also review the “SAFETY CONSIDERATIONS”
Items to be checked Check
Did you explain about operations while showing the
manual to your customer?
Did you hand the
operation
manual over to your customer?
operation
c. Points for explanation about operations
The items with WARNING and CAUTION marks in the operation
manual are the items pertaining to possibillties for bodily injury and
material damage in addition to the general usage of the product.
Accordingly, it is necessary that you make a full explanation about
the described contents and also ask your customers to read the operation manual.
2-3 NOTE TO INSTALLER
• Be sure to instruct customers how to properly operate the
unit (especially cleaning filters, operating different functions,
and adjusting the temperature) by having them carry out
operations themselves while looking at the manual.
3. SELECTING INSTALLATION SITE
Please attach additional thermal insulation material to the unit
body when it is believed that the relative humidity in the ceiling
exceeds 80%. Use glass wool, polyethylene foam, or similar
with a thickness of 3/8”. or more as thermal insulation material.
(1) Select an installation site where the following conditions are
fulfilled and that meets with your customer’s approval.
•
In the upper space (including the back of the ceiling) of the
indoor unit where there is no possible dripping of water
from the refrigerant pipe, drain pipe, water pipe, etc.
• Where optimum air distribution can be ensured.
• Where nothing blocks the air passage.
• Where condensate can be properly drained.
• If supporting structural members are not strong enough
to take the unit’s weight, the unit could fall out of place
and cause serious injury.
• Where the false ceiling is not noticeably on an incline.
• Where there is no risk of flammable gas leakage.
• Where sufficient clearance for maintenance and service
can be ensured. (Refer to Fig. 1)
• Where piping between indoor and outdoor units is possible within the allowable limit. (Refer to the installation
manual of the outdoor unit.)
NOTE
• Install the indoor and outdoor units, power supply wiring and
connecting wires at least 3.5ft. away from televisions or
radios in order to prevent image interference or noise.
(Depending on the radio waves, a distance of 3.5ft. may not
be sufficient enough to eliminate the noise.)
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(2) Use suspension bolts for installation. Check whether
the ceiling is strong enough to support the weight of
the unit or not. If there is a risk, reinforce the ceiling
before installing the unit.
4. PREPARATIONS BEFORE INSTALLATION
(1) Relative positions of indoor unit and suspension bolt.
(Refer to Fig. 2)
5. INDOOR UNIT INSTALLATION
Installing optional accessories before installing the indoor
unit is easier.
As for the parts to be used for installation work, be sure to use
the provided accessories and specified parts designated by our
company.
(1) Fix the hanger bracket to the suspension bolt. Tighten both
upper and lower nuts firmly using washers.
(2) Install a canvass duct to the air discharge outlet and air inlet
so that vibration from the machine body isn’t transmitted to
the duct or ceiling.
You should also apply acoustic (insulation material) to the
inside of the duct, and vibration insulation rubber to the suspension bolts.
(3) Install suspension bolts.
(Use bolts of 3/8” diameter.)
• Install the equipment where supporting structures are
strong enough to bear the equipment’s weight. Use
embedded inserts or anchor bolts with new buildings and
hole-in-anchors with old buildings.
(2) Adjust the height of the unit.
(3) Make sure the unit is
level.
• Level the unit with
a level when
installing. If the unit
is not level, it could
become the source
of water leaks.
• When leveling the
unit, check all four
corners with a level
or a vinyl tube containing water. (See
the figure on the
right.)
(4) Tighten the nuts on the top.
NOTE
Setting the unit at an angle opposite to the drain piping
might cause leaks.
5
6. REFRIGERANT PIPING WORK
6-1 GENERAL INSTRUCTIONS
• For refrigerant piping of outdoor units, see the installation
manual attached to the outdoor unit.
• Before refrigerant piping work, check which type of refrigerant is used. Proper operation is not possible if the types of
refrigerant are not the same.
• The outdoor unit is charged with refrigerant.
NOTE
• Use a pipe cutter and flare suitable for the type of refrigerant.
•
To prevent dust, moisuture or other foreign matter from infiltrating
the tube, either pinch the end or cover it with tape.
• Do not allow anything other than the designated refrigerant
to get mixed into the refrigerant circuit, such as air, etc. If any
refrigerant gas leaks while working on the unit, ventilate the
room thoroughly right away.
6-2 Connecting the refrigerant piping
• When connecting the flare nut, coat the flare both inside and
outside with ester oil or ether oil and initially tighten by hand 3
or 4 turns before tightening firmly.
• To prevent flare nut cracking and gas leaks, be sure to use
both a spanner and torque wrench together, as shown in the
drawing below, when connecting or disconnecting pipes to/
from the unit.
Not recommendable but in case of emergency
You must use a torque wrench but if you are obliged to
install the unit without a torque wrench, you may
follow the installation method mentioned below.
After the work is finished, make sure to check that
there is no gas leak.
When you keep on tightening the flare nut with a spanner,
there is a point where the tightening torque
suddenly increases. From that position, further tighten the
flare nut the angle shown below:
Table 3
Pipe size
φ 1/4” 60 to 90 degrees Approx. 5 7/8
φ 3/8” 60 to 90 degrees Approx. 7 7/8
φ 1/2” 30 to 60 degrees Approx. 9 13/16
φ 5/8” 30 to 60 degrees Approx. 11 13/16
Further tightening
angle
Recommended arm length of
tool (in.)
6-3 Piping insulation
• Execute heat insulation work completely on both sides of the
gas piping and the liquid piping. Otherwise, a water leakage
can result sometimes.
• When using a heat pump, the temperature of the gas piping
can reach up to approximately 250°F, so use insulation
which is sufficiently resistant.
•
Also, in cases where the temperature and humidity of the refrigerant piping sections might exceed 86°F or RH80%, reinforce
the refrigerant insulation. (13/16” or thicker) Condensation may
form on the surface of the insulating material.
• Check the pipe connector for gas leaks, then insulate it as
shown in the drawing below.
• Make absolutely sure to execute heat insulation works on the
pipe-connecting section after checking gas leakage by thoroughly studying the following figure and using the attached
heat insulating materials for fitting. (Fasten both ends with
the clamps (accessory).)
• Wrap the sealing pad (accessory) only around the insulation
for the joints on the gas piping side.
• Refer to the Table 2 for the dimensions of flare nut spaces.
•
Refer to the Table 2 to determine the proper tightening torque.
Table 2
Pipe
Tightening torque
size
φ
1/4”10.4 – 12.7 0.342-0.358
φ 3/8”
φ 1/2”
φ 5/8”
(ft.lbf)
24.1 – 29.4 0.504-0.520
36.5 – 44.5 0.638-0.654
45.6 – 55.6 0.760-0.776
Flare
dimensions
A (in.)
Flare shape (in.)
NOTE
• Apply ester oil or ether oil around the flare portions before
connecting.
• The flare nuts used must be those included with the main
body.
• Over-tightening may damage the flare and cause a refrigerant leakage.
CAUTION
Be sure to insulate any field piping all the way to the piping
connection inside the unit. Any exposed piping may cause
condensation or burns if touched.
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