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4

2-2

OPTIONAL ACCESSORIES

• The optional decoration panel and remote controller are 

required for this indoor unit. 

Table 1

Table 2

FOR THE FOLLOWING ITEMS, TAKE SPECIAL 
CARE DURING CONSTRUCTION AND CHECK 
AFTER INSTALLATION IS FINISHED.

a. Items to be checked after completion of work

b. Items to be checked at time of delivery

Also review the “SAFETY CONSIDERATIONS”

c. Points for explanation about operations

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.
For this unit, you are able to select air flow direction.
To enable the discharge of air in 2 or 3 directions, it is necessary 
to purchase the optional blocking pad kit.

(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.

• Where piping between indoor and outdoor units is possi-

ble 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.)

(2) Ceiling height

This indoor unit may be installed on ceilings up to 11.5 ft. 

(30, 36: 13.8 ft.) in height. (Refer to the table.) 

(3) Air flow direction 

(The below figures are greatly generalized.)

Select the air flow directions best suited to the room and 

point of installation. (For air discharge in 2 or 3 directions, it 

is necessary to make field settings by remote controller and 

to close the air outlet(s). Refer to the installation manual of 

the optional blocking pad kit and the section entitled “FIELD 

SETTING”.)

Model

Optional decoration panel

Color

White

FXFQ12 · 18 · 24 · 30 · 36MVJU

BYC125KW1

Remote controller

Wired type

BRC1C71

Items to be checked

If not properly done, what is 
likely to occur.

Check

Are the indoor and outdoor unit 
fixed firmly?

The units may drop, vibrate or 
make noise.

Is the gas leak test finished? 

It may result in insuffcient cool-
ing.

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?

The unit may malfunction or 
the components burn out.

Are wiring and piping correct?

The unit may malfunction or 
the components burn out.

Is the unit safely grounded?

Dangerous at electric leakage.

Is wiring size according to 
specifications?

The unit may malfunction or 
the components burn out.

Is something blocking the air 
outlet or inlet of either the 
indoor or outdoor units?

It may result in insufficient cool-
ing.

Are refrigerant piping length 
and additional refrigerant 
charge noted down?

The refrigerant charge in the 
system is not clear.

Items to be checked

Check

Did you explain about operations while showing the operation 
manual to your customer?
Did you hand the operation manual over to your customer?

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 expla-
nation about the described contents and also ask your customers to 
read the operation manual.

Number of discharge outlets used

FXFQ12M~24M

4-way air 

discharge

3-way air 

discharge

2-way air 

discharge

Ceiling 

height

Standard

8.9

9.9

11.5

Number of discharge outlets used

FXFQ30M·36M

4-way air 

discharge

3-way air 

discharge

2-way air 

discharge

Ceiling 

height

Standard

10.5

11.8

13.8

Summary of Contents for FXFQ12MVJU

Page 1: ...VJU FXFQ18MVJU FXFQ24MVJU FXFQ30MVJU FXFQ36MVJU SYSTEM Inverter Air Conditioners INSTALLATION MANUAL Read these instructions carefully before installation Keep this manual in a handy place for future...

Page 2: ...LATION 5 5 INSTALLATION PROCEDURES FOR FRESH AIR INTAKE DUCT CONNECTION 6 6 INDOOR UNIT INSTALLATION 6 7 REFRIGERANT PIPING WORK 7 8 DRAIN PIPING WORK 8 9 ELECTRIC WIRING WORK 10 10 WIRING EXAMPLE AND...

Page 3: ...esult in the equip ment 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 t...

Page 4: ...ne of transport Leave the unit inside its packaging while moving until reach ing the installation site Where unpacking is unavoidable use a sling of soft material or protective plates together with a...

Page 5: ...t be sufficient enough to eliminate the noise 2 Ceiling height This indoor unit may be installed on ceilings up to 11 5 ft 30 36 13 8 ft in height Refer to the table 3 Air flow direction The below fig...

Page 6: ...rked on the paper pattern for instal lation Refer to it to check for points requiring reinforcing length in 4 PREPARATIONS BEFORE INSTALLA TION 1 Relation of ceiling opening to unit and suspension bol...

Page 7: ...nd a sunken insert sunken anchor or other field supplied parts for new ceilings to reinforce the ceiling to bear the weight of the unit Adjust clearance from the ceiling before proceeding further 5 IN...

Page 8: ...BEFORE INSTALLATION 1 3 Perform steps 4 5 in 6 1 For new ceilings 7 REFRIGERANT PIPING WORK 7 1 GENERAL INSTRUCTIONS For refrigerant piping of outdoor units see the installation man ual attached to t...

Page 9: ...unit Any exposed piping may cause condensation or burns if touched 7 4 Brazing referigerant piping Before brazing local refrigerant piping nitrogen gas shall be blown through the piping to expel air...

Page 10: ...r the operating capacity of the unit NOTE Drain piping connections Do not connect the drain piping directly to sewage pipes that smell of ammonia The ammonia in the sewage might enter the indoor unit...

Page 11: ...ax 3280 ft Total wiring length 6560 ft 2 Indoor unit Remote controller Max 1640 ft 10 WIRING EXAMPLE AND HOW TO SET THE REMOTE CONTROLLER 10 1 HOW TO CONNECT WIRINGS Methods of wiring power supply uni...

Page 12: ...he terminal Tightening torque 0 97ft lbf 10 2 Tightening torque for the terminal screws Use the correct screwdriver for tightening the terminal screws If the blade of screwdriver is too small the head...

Page 13: ...rystal display air filer signs to display the time to clean air filters Change the SECOND CODE NO according to Table 5 depending on the amount of dirt or dust in the room SECOND CODE NO is factory set...

Page 14: ...ON FOR SERVICING of the outdoor unit If any of the items in Table 6 are displayed there may be a problem with the wiring or power so check the wiring again Table 4 Remote control display Content Conce...

Page 15: ...14 MEMO...

Page 16: ...0403 HT 3PN01417 8U EM03A040B Daikin US Corporation 375 Park Avenue Suite 3308 New York NY 10152 www daikinac com info daikinac com...

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