Haier AD42NAMNAA user guide manual

INSTRUCTION

MANUAL

No. 0010570247

G

DUCT TYPE AIR CONDITIONER

AD242AMNAA
AU242ANNAA
(HDU-24CA03/M(R1))
AD282AMMAA
AU282ANMAA
(HDU-28C03/M)
AD282AMACA
AU282ANAFA
(HDU-28H03/M)
AD28NAMBAA
AU28NANBAA
(HDU-28HA03/M(R1))
AD28NAMNAA
AU28NANNAA
(HDU-28CA03/M(R1))
AD362AMBAA
AU362APBAA
(HDU-36HC03/M(R1))

AD36NAMNAA
AU36NAPNAA
(HDU-36CA03/M(R1))
AD36NAMBAA
AU36NAPBAA
(HDU-36HA03/M(R1))
AD42NAMMAA
AU42NAPMAA
(HDU-42C03/M)
AD42NAMACA
AU42NAPAGA
(HDU-42H03/M)
AD42NAMBAA
AU42NAPBAA
(HDU-42HA03/M(R1))
AD42NAMNAA
AU42NAPNAA
(HDU-42CA03/M(R1))

****

1

TABLE OF CONTENTS

OPERATION

9-14

MALFUNCTION

15-16

CARE AND MAINTENANCE

17

FOR PREPARATION OF HEATING("HOT KEEP")

18

IS THE UNIT INSTALLED CORRECTLY

19

INSTALLATION MANUAL FOR WIRE CONTROLLER

20-21

INSTALLATION MANUAL FOR OUTDOOR UNIT

22-25

INSTALLATION MANUAL FOR INDOOR UNIT

26-31

SAFETY PRECAUTIONS

3-5

PARTS AND FUNCTIONS

6-8

CAUTIONS

2

AIR PURGING METHOD (TO USE VACUUM PUMP)

32

*

CAUTIONS

2

All electrical repairs must be carried out by
qualified electricians. Inadequate repairs may
result in a major source of danger for the user of
the air conditoiner.

Do not damage any parts of the air conditioner
that carry refrigerant by piercing or perforating
the air conditioner's tubes with sharp or pointed
items, crushing or twisting any tubes, or scraping
the coatings off the surfaces. If the refrigerant
spurts out and gets into eyes, it may result in
serious eye injuries.

Do not obstruct or cover the ventilation grille
of the air conditioner. Do not put fingers or any
other things into the inlet/outlet and swing louver.

Do not allow children to play with the air
conditioner. In no case should children be allowed
to sit on the outdoor unit.

Disposal of the old air conditioner

Before disposing an old air conditioner that
goes out of use, please make sure it's
inoperative and safe. Unplug the air
conditioner in order to avoid the risk of
child entrapment.

It must be noticed that air conditioner
system contains refrigerants, which require
specialized waste disposal. The valuable
materials contained in a air conditioner can
be recycled. Contact your local waste
disposal center for proper disposal of an
old air conditioner and contact your local
authority or your dealer if you have any
question. Please ensure that the pipework
of your air conditioner does not get
damaged prior to being picked up by the
relevant waste disposal center, and
contribute to environmental awareness by
insisting on an appropriate, anti-pollution
method of disposal.

Disposal of the packaging of your new air
conditioner

All the packaging materials employed in
the package of your new air conditioner
may be disposed without any danger to the
environment.

The cardboard box may be broken or cut
into smaller pieces and given to a waste
paper disposal service. The wrapping bag
made of polyethylene and the polyethylene
foam pads contain no fluorochloric
hydrocarbon.

Consult your local authorities for the name
and address of the waste materials collecting
centers and waste paper disposal services
nearest to your house.

Safety Instructions and Warnings

Installation shall be done by professional people,
don't install unit by yourself.

All these valuable materials may be taken to
a waste collecting center and used again
after adequate recycling.

Damaged air conditioners are not to be put
into operation. In case of doubt, consult your

Use of the air conditioner is to be carried out
in strict compliance with the relative instructions
set forth in the User's Guide.

For the purpose of safety, the air conditioner
must be properly grounded in accordance with
specifications.

Always remember to unplug the air conditioner
before opening inlet grill. Never unplug your air
conditioner by pulling on the power cord. Always
grip plug firmly and pull straight out from the

The manufacturer does not accept responsibility
for any damages that may arise due to non­observation of the following instruction.

Before starting the air conditioner, read
the information given in the User's Guide
carefully. The User's Guide contains very
important observations relating to the
assembly, operation and maintenance of
the air conditioner.

*

Attention:
As a result of poor conditions of the electrical
MAINS, shortly voltage drops can appear when
starting the EQUIPMENT. This can influence other
equipment (et.Blinking of a lamp). If the MAIN­IMPEDANCE Zmax<0.095388656HM, such
disturbance are not expected. In case of need , you
may contact your local supply authority for further
information.

SAFETY PRECATIONS

Before starting to use the system, read carefully this"SAFETY PRECAUTIONS" to ensure a proper operation of the system.
Safety precautions described here are classified to " WARNING" and " CAUTION". Precautions which are shown in the column of

"

WANING" means that an improper handing could lead to a grave result like a death, serious injury, etc. However, even if precautions
are shown in the column of " CAUTION", a very serious problem could occur depending on situation. Make sure to observe these safety
precautions faithfully because they are very important information to ensure the safety.

Symbols which appear frequently in the text have following meanings.

Strictly prohibited.

Observe instructions faithfully.

Provide a positive grounding.

When you have read through the manual, keep it always at hand for read consultation. If the operator is replaced, make sure to hand over
this manual to the new operator

.

ON

OFF

WARNING

CAUTION

WARNING

CAUTION

CAUTIONS FOR INSTALLATION

The system should be applied to places as
of

fice, restaurant, residence and the like.

The system should be installed by your
dealer or a professional installer

.

When you need some optional devices such as a hu­midifier

, electric heater, etc., be sure to use the products
which are recommended by us. These devices should
be attached by a professional installer.

Application to inferior environment such as an engi­neering shop, could cause equipment malfunction and
serious injury or death

Installation by yourself is not encouraged because
it could cause such problems as water leakage,
electrical shock or fire accident by some improper
handing

Installation by yourself is not encouraged because it
could cause such problems as water leakage, electrical
shock or fire accident by some improper handing

Do not install nearby the place where may
have leakage of flammable gas.

Depending on the place of installation, a
circuit breaker may be necessary

.

Drain pipe should be arranged to provide a
positive draining.

If the gas leakes and gathers around, it may cause the
fire

Unless the circuit breaker is installed, it could
cause elecrical shocks

Where strong winds may prevail, the
system should be fixed securely to prevent
a collapse.

Install on the place where can endure
the weight of air conditioner

.

Make sure the system is grounded.

If the pipe is arranged improperly, furniture or the
likes may be damaged by leaked water

Bodily injury could result by a collapse

Bodily injury could result by a careless installation

Grounding cable should never be connected to a gas
pipe, city water pipe, lightning conductor rod or
grounding cable of telephone If the grounding cable
is not set properly

, it could cause electric shocks

CAUTIONS FOR OPERATION

You should refrain from exposing your body
directly to cool wind for a long time.

Do not poke the air inlet or outlet with a
bar

, etc.

When any abnormal condition (scorching smell or oth­ers) is found, stop the operation immediately and turn
of

f the power switch. Then consult your dealer.

It could affect your physical condition or cause some
health problems

Since the internal fan is operating with a high
speed, it could cause an injury

If you continue the operation without removing the
cause, it could result in a trouble, electric shock or fire

The system should never be used for any
other purposes than intended such as for
preservation of food, flora and fauna, pre­cision deices or work of art.

Do not handle switches with a wet hand.

Combustion apparatus should not be placed
allowing a direct exposure to wind of air con­ditioner

Incomplete combustion could occur on the apparatus

It could cause electric shocks

It could cause deterioration of food or other problems

3

SAFETY PRECAUTIONS

4

CAUTION

Do not wash the air conditioner with water.

Do not install the system where the air outlet
reaches directly the flora and fauna

Make sure to use a fuse of proper electric
rating.

Do not operate the system while the
air outlet grill is removed.

It is strictly prohibited to place a container of
combustible gas or liquid near the air condi­tioner or to spray it directly with the gas or liquid.

Neither stand on the air conditioner nor
place something on it.

Do not use the power switch to turn on or
of

f the system.

Do not touch the air outlet section while
the swing louver is operating.

Do not use such equipment as a water
heater

, etc. around the indoor unit or the
wire controller.

ON

OFF

It could cause electric shocks

It will not be good for their health

Use of steel or copper wire in place of a fuse is strictly
prohibited because it could result in a trouble or fire
accident

There is a risk of injury

It could cause a fire accident

There are risks of falling or injury by collapsed object

It could cause a fire or water leakage There is a risk of injury

If the system is operated at the vicinity of such equip­ment which generates steam, condensed water may
drip during cooling operation or it could cause a fault
current or short-circuit

When operating the system simultaneously with a combustion
apparatus, indoor air must be ventilated frequently

.

Check occasionally the support structure of the unit for any damage
after a use of long period of time.

Insufficient ventilation could cause an oxygen deficiency accident If the structure is not repaired immediately, the unit could topple down to cause

a personal injury

When cleaning the system, stop the operation and turn off the
power switch.

Do not put water containers on the unit such as a flower vase, etc.

Cleaning should never be done while the internal fans are running with high
speed

If the structure is not repaired immediately, the unit could topple down to cause
apersonal injury

WARNING

CAUTIONS FOR TRANSFER OR REPAIR

Modification of the system is strictly prohibited. When the system
needs a repair

, consult your dealer.

When the air conditioner is relocated, contact your dealer or a pro­fessional installer

.

Improper practice of repair could cause water leakage, electric shock or fire Improper practice of installation could cause water leakage, electric shock or fire

SAFETY PRECAUTION

5

2. If the supply cord is damaged, it must be replaced by the manufacturer or its service agent
or a similar qualified person.

3. If the fuse on PC board is broken please change it with the type of T3.15A /250VAC.

4. The wiring method should be in line with the local wiring standard.

1. Applicable ambient temperature range:

The machine is adaptive in following situation

5. The power cable and connecting cable are self-provided.
The power cable should beH07RN-F 5G 2.5mm2 (for 36,42 series, 28 series (380-400V,
3N~, 50Hz)) or H07RN-F 3G 4.0mm2 (for 24,28,36 series (1PH, 220-230V~, 50Hz)) .
The connecting cable should beH05RN-F 6G 1.5mm2.
All the cables shall have got the European authentication certificate. During installa­ tion, when the connecting cables break off, it must be assured that the grouding wire is
the last one to be broken off.

6. The breaker of the air conditioner should be all-pole switch; and the distance between its
two contacts should be no less 3mm.

7. The indoor unit installation height is at least 2.5m.

Cooling

Heating

Indoor

Indoor

Outdoor

Outdoor

Maximum:
Minimum:

Maximum:
Minimum:

Maximum:
Minimum:

Maximum:
Minimum:

D.B / W.B
D.B / W.B

D.B / W.B
D.B / W.B

D.B / W.B

D.B / W.B

D.B
D.B

D.B

32 / 23
18 / 14

-7 / -8

24 / 18

43

15

15

27

/ 26

PARTS AND FUNCTIONS

6

Indoor Unit

Air outlet

Air inlet

Duct

Air outlet

Air inlet

Duct

Outdoor Unit

Air inlet

Air outlet

Compressor
(Inside of unit)

Connecting piping
and electrical wiring

Air inlet

Air outlet

Drain hose

For series 24,28

For series 36,42

For series 24,28

For series 36,42

Buttons and display of the wire controller.

Cautions:
On cooling only unit, heating
mode is not available.
HEAT HEALTH FUNCTION are
not available.

Note:
The above information is the explanation of
the displayed information therefore varies
with those displayed in actual operation.

7

CLOCK

Used to set correct time.

TIMER

Used to select
TIMER ON,
TIMER OFF,
TIMER ON/OFF.

TIME

Used to set clock and
timer setting.

Used for unit start and
stop.

Power ON/OFF

MODE

Used to select AUTO
RUN, COOL, DRY,
HEAT and FAN
operation.

FAN SPEED

Used to select fan
speed: LO, MID, HI,
AUTO

TEMP

Used to select your
desired temp.

SET

Used to confirm Timer
and Clock settings.

SLEEP

Used to select sleep
mode.

AM
PM

AM
PM

PARTS AND FUNCTIONS

Operation

AUTO

%

SET

ROOM

ON OFF

MODE

FAN SWING

TEMP

CLOCK SET

TIMER SLEEP

RESET

FILTER RESET

ON/OFF

HEALTH

HEAT

***

HEALTH

Used to set HEALTH
FUNCTION

HEAT

Used to select Auxiliary heater.

*

OPERATING LAMP

PARTS AND FUNCTIONS

8

Buttons and display of the wire controller.

DRY

COOL

AUTO

FAN SPEED

SLEEP

TIMER ON

TIMER OFF

CLOCK

TEMP.

FAN OPERATION

HEAT

Clock set

When unit is started for the first time, clock should be adjusted as follows:
Press CLOCK button, "AM"or "PM" flashes.
Press or to set correct time. Each press will increase or decrease 1min. If the
button is kept depressed, time will change quickly.
After time setting is confirmed, press SET, "AM "and "PM" stop flashing, while clock
starts working.

Operation

Remote control

AM
PM

AM
PM

***

AUTO

%

SET

ROOM

ON OFF

MODE

FAN SWING

TEMP

CLOCK SET

TIMER SLEEP

RESET

FILTER RESET

ON/OFF

HEALTH

HEAT

***

MODE

FAN SWING

TEMP

CLOCK SET

TIMER SLEEP

RESET

FILTER RESET

ON/OFF

1

4

2

AM

ROOM

OPERATION

9

Fan operation

Enjoy yourself by just a gentle press.

(1) Unit start

(2) Select operation mode

(3) Fan

Press ON/OFF button, unit starts.
Previous operation status appears on display.
(Not Timer setting)
Power indicator lights up.

Press MODE button. For each press, operation
mode changes as follows:

Unit will run in selected mode.
stop display at " " FAN.

Press FAN button. For each press, fan speed
changes as follows:

Unit will run at selected fan speed.

Wire controller can memorize settings in each operation mode. To run it next time just select
the operation mode and it will start with the previous setting.
No reselecting is needed.(TIMER ON/OFF needs reselecting)
In FAN mode, temp. can't be set.

Hints

For cooling only type no " HEAT " function.

AUTO COOL DRY FAN

The air conditioner has the function of POWER
FAILURE RESUME.

(4) Unit stop

Press ON/OFF button.
Only time and room temp remains on LCD.
All indicators go out.
Vertical flap closed automatically.

HEAT

LOW

MID HIGH

HEAT

3

AUTO RUN, COOL,HEAT and DRY operation

Use COOL in summer.
Use HEA

T in winter.

Use DRY in spring,autumn and in damp climate.

(1) Unit start

(2) Select operation mode

(3) Select temp. setting

Press ON/OFF button, unit starts.
Previous operation status appears on display
(Not

Timer setting). Power indicator lights up.

Press MODE button. For each press, operation mode
changes as follows:

Unit will run in operation mode displayed on LCD.
Stop display at your desired mode.

Every time the button is pressed, temp. setting
increases 1 C.
If button is kept depressed, temp.setting will
increase quickly

.
Every time the button is pressed, temp. setting
decreases 1 C.
If button is kept depressed, temp. setting will
decrease quickly.

Recommendations

Hints

Wire controller can memorize each operation
status. When starting it next time, just press
ON/OFF button and unit will run in previous
status.

Press FAN button. For each press, fan speed changes
as follows:

(4) Fan speed selection

Unit runs at the speed displayed on LCD.
In HEA

T mode, warm air will blow out after a short
period of time due to cold-draft prevention function.
In DRY mode, when room temp. becomes 2 C
higher than temp. setting, unit will run intermittently
at LOW speed regardless of FAN setting.

Unit will start running to reach the temp. setting
on LCD.

Press ON/OFF button.
Only time and room temp remains on LCD.
All indicators go out.
V

ertical flap closes automatically.

(5) Unit stop

Press TEMP button

10

AUTO

LOW

MID HIGH

AUTO

AUTO COOL DRY F ANHEAT

AM

***

OPERATION

AUTO

MODE

FAN SWING

TEMP

CLO SET

TIMER SLEEP

RESET

FILTER RESET

ON/OFF

1

5

2

3

SET

H

HEAT

4

***

ON

MODE

FAN SWING

TEMP

CLOCK SET

MER SLEE

T

FILTER RE

ON/OFF

AM AM

1

2

4

3

SET

OPERATION

11

TIMER operation

Hints

Set Clock correctly before starting Timer operation.

Y ou can let unit start or stop automatically at following time: Before you wake up in the
morning, or get back from outside or after you fall asleep at night.

Operation mode will be displayed on LCD.
Power indicator lights up.

(2)TIMER mode selection

Press TIMER button to change TIMER mode.
Every time the button is pressed, display changes
as follows:

Select your desired TIMER mode (ON or OFF)

(3)Timer setting

Press TIME button.

Every time the button is pressed, time increases 10min.
If button is kept depressed, time will change quickly

.
Every time the button is pressed, time decreases 10min.
If button is kept depressed, time will change quickly.
Time will be shown on LCD. It can be adjusted within
24hours.

(4)Confirming your setting

After setting correct time, press SET button to confirm
"ON" or "OFF" stops flashing.
T

ime displayed: Unit starts or stops at x hour x min (ON
or OFF).
Timer mode indicator lights up.

TIMER ON/OFF

To cancel TIMER mode

Just press TIMER button several times until TIMER mode disappears.

Wire controller possesses memory function, when use TIMER mode next time, just
press SET

button after mode selecting if timer setting is the same as previous one.

(1)After unit start, select your desired
operation mode.

blank

ON

OFF

ON

OFF

HEALTH

HEAT

***

ON OFF

MODE

FAN SWING

TEMP

CLOCK SET

MER SLEEP

FILTER RE

ON/OFF

PM

AM

1

5

6

4

2

3

SET

blank

ON

OFF

ON

OFF

OPERATION

12

TIMER ON-OFF

Operation mode will be displayed on LCD.
Power indicator lights up.

Every time the button is pressed, display changes as follows:

Select .

(3)Time setting for TIMER ON

Press TIME button.

(5)Time setting for TIMER OFF

To cancel TIMER mode

Every time the button is pressed, time increases 10min.
If button is kept depressed, time will change quickly

.
Every time the button is pressed, time decreases 10min.
If button is kept depressed, time will change quickly.
Time will be shown on LCD.
It can be adjusted within 24hours.

AM refers to morning and PM to afternoon.

Time displayed: Unit starts at Xhour X min.

After time setting, press TIMER button to confirm.
"ON" stops blinking,

While "OFF" starts blinking.

(4) Time confirming for TIMER ON

Follow the same procedures in "Time setting for
TIMER ON".

(6)Time confirming for TIMER OFF

After time setting, press SET button to confirm
"OFF" stops flashing.

Time displayed: Unit stops at X hour X min.

Just press TIMER button several times until TIMER mode disappears.
According to the Time setting sequence of TIMER ON or TIMER OFF, either Start-Stop or Stop-Start can
be achieved.

(1)After unit start, select your desired
operation mode

(2) Press TIMER button to change TIMER
mode

ON
OFF

HEALTH

HEAT

AM

***

OPERATION

about 6 hrs

1 hr

1 hr

increase 1 C

increase 1 C

13

At night, before going to bed you
can press down the SLEEP

button
on the controller and the air­conditioner will run by the
comfortable sleeping mode to
make you sleep more comfortable.

One hour after sleeping operation start, the temp. is 1 C higher than the setting one. After another
hour the temp. rises 1 C and then run continuously for another 6

hrs' and then close. The actual

temp. is higher than the setting one which is to prevent from being too cool to your sleep.

In cooling, dehumidifying mode

One hour after start up, the temp. decrease 2 C lower than the setting one. After another hour
decrease by more 2 C.
The temperature will automatically rise by 1 C after another 3hrs' operation, and then automatically
close after 3hrs' continuous operation.

The actral temperature is lower than the setting one which

is to prevent from being too hot to your sleep.

In heating mode

SETTING T

SLEEP RUN BEGINS SLEEP RUN STOPS

1 hr

1 hr

3 hrs

about 3 hrs

decrease 2 C

decreases 2 C

increase1 C

SHUT DOWN

SLEEP RUN STOPS

Heat mode

SLEEP RUN BEGINS

SETTING T

SHUT DOWN

Cooling mode

Comfortable Sleep

Note:
In

AUTO mode, unit will run in SLEEP function according to the operation mode.
After setting SLEEP function, it is forbidden to calibrate clock.
If the set sleep-time does not reach 8 hours, the unit will stop operation automatically after set
time is complete.
Set "TIMER-OFF" function first, then set SLEEP, and the sleep-set is performance; set TIMER­ON function first, the sleep function can only be set before TIMER-ON; if set theSLEEP function
first, the TIMER function can not be set.

Press SLEEP button once to make the air conditioner have the previous-set sleep time (first power­on is "1h"), the sleep symbol will appear

. Press time button / , you can choose the time in
1~8 hours. Each press f / , the time increases/reduces 1 hour and "xh" appears in the humidity
setting part, "OFF" appears in "TIMER OFF" display part and timer-off time; press SLEEP button
again to cancel sleep function, the sleep symbol diappears.

MODE

FAN SWING

TEMP

CLOCK SET

TIMER SLEEP

R

FILTER RESET

ON/OFF

AM

SET

OFF

HEALTH

HEAT

14

OPERATION

Power Failure Compensation (to be applied for a necessary situation)

After the power failure compensation is set, if power failure suddenly occurs while the air conditioner
is working, it will resume the previous working state when the power is supplied again.

Setting Method: When the wire controller is on (excluding timer mode and fan mode), press
the "Sleeping" button on the remote controller 10 times within 5 seconds, and
after the buzzer rings 4 times, the air conditioner will enter the state of power
failure compensation.

Cancel Method: Press the "Sleeping" button on the wire controller 10 times within 5 seconds,
and after the buzzer rings 2 timer, the power failure compensation mode will be
cancelled.

Notes: When a power failure suddenly occurs during the air conditioner is working after the power
failure compensation is set, if the air conditioner will not be used for a long time, please cut off the
power supply to prevent its operation from being resumed after the power is supplied again, or press
the "Switch On/Off" button after the power comes again.

In this series changeover switch is set:

1. ON 2.OFF 3.OFF 4.OFF

Change-over switch

MARK ON

1
2
3
4

3 level fan speed

AUTO mode

Display of humidity

Swing

OFF

2 level fan speed

Varible Temp. setting Auto Mode

No display of humidity

No swing

15

please check the following things about your air conditioner before making a servie call.

Unit fails to start

MALFUNCTION

ON

OFF

Is the power source
switch adjust cut in?

Is city supply power in
normal?

Power
stoppage?

Isn't the signal receiving
section exposed to the
dir

ect sunlight or strong

illumination?

Isn't the earth leakage
breaker in action?

It is dangerous. Turn off
the power supply switch
immediately and contact
the sales dealer

.

Power supply switch is
not ON.

Cooling or heating is not sufficient

Is the thermostat adjust
as r

equired?

Isn't the air filter dirty?

Isn't any doors or windows
left open?

Doesn't any obstacle
exist at the air inlet or
outlet?

Cooling is not sufficient

Isn't sun-shine invading
dir

ect?

Isn't any unexpected
heating load generated?

Isn't the room much
cr

owded?

Isn't the swing louver
horizontal?
(At HEA

TING mode)

If swing louver is horizontal,
the blow wind does not reach
floor

.

The wind does not blow
during heating operation

Isn't it warming up?

page 9

When the air conditioner does not operate properly after you have checked the above mentioned
items or when the following phenomenon is observed, stop the operation of the air conditioner
and contact your sales dealer

.

The fuse or breaker often shuts down.
W

ater drops off during cooling operation.
There is a irregularity in operation or abnormal sound is audible.
When the CHECK lamp (red) flickers, an irregularity has occurred in the air conditioner.

Note:

This unit has a function of automatic restart system after recovering power stoppage. Please contact the sales
dealer if it is not required.

Flickering

E0

The trouble
of the
drainage
system

Content
of defect

E1

The trouble
of the room
temp sensor

E2

The trouble
of the pipe
temp sensor

E3

The trouble
of the outdoor
temp sensor

E4

The trouble of
the outdoor
pipe temp
sensor

E5

The trouble of
the overload
current

E6

The trouble of
the low pressure
pressure of pipe

E8

The trouble of the
main control board
communication

E9

The trouble of the
main control board
outdoor board
communication

16

MALFUNCTION

The followings are not malfunction

Shuru

Shuru

When the air conditioner is started, when the compressor starts or
stops during operation or when the air conditioner is stopped, it
sometimes sounds "shuru shuru" or "gobo gobo". It is the flowing
sound of the refrigerant, and it is not a trouble.

Water flowing
sound is heard.

This is caused by heat expansion or contraction of plastics.

Cracking sound is heard.

It smells.

Air which blows out from the indoor unit sometimes smells.
The smell results from residents of tobacco smoke or cosmetics
stuck inside of unit.

When the air conditioner is used at restaurant etc. where dense
edible oil fume is always exists, white fog sometimes blows out
of air outlet during operation.
In this case consult sales dealer for cleaning the heat exchanger.

During operation,
white fog comes
out of indoor unit.

Unit does
not start

Wait for
three
minutes

It is switched into the FAN mode
during cooling.

To prevent frost from being accumulated on the indoor unit heat
exchanger, it is sometimes automatically switched to the FAN mode
but it will soon return to the cooling mode.

Even if the operation switch is turned on, cooling, dehumidifying
or heating is not operable for three minutes after the conditioner is
stopped. Because the protecting circuit is activated.
(During this time air conditioner operates in fan
mode.)

The air conditioner can not be
restarted soon after it stops.

Air does not blow or the fan
speed can not be changed during
dehumidifying

During operation, operation mode
has changed over automatically.

Water or steam generates from
the outdoor unit during heating.

When it is excessively cooled during dehumidifying, the blower
automatically repeats reducing and lowering the fan speed.

Isn't the AUTO mode selected?
In the case of AUTO mode, operation mode is changed automati­cally from cooling to heating or vise-versa according to the room
temperature.

This results when frost accumulated on the outdoor unit is removed
(during defrosting operation).

17

CARE AND MAINTENANCE

Points to observe

Turn off the power supply switch. Do not touch with wet hand.

Do not use hot water or volatileliquid.

ON

OFF

Thinner

Do not
use!

Benzine

Tooth powder

Cleaning

1. Clean the air filter by lightly tapping it or with the cleaner. It is more
ef

fective to clean the air filter with water.

If the air filter is very dirty, dissolve neutral detergent in the lukewarm
water (approx. 30 C), rinse the air filter in the water, and thoroughly
wash the air filter off the detergent in the plain water.

2. After drying the air filter, set it up on the air conditioner.

CAUTION

Do not dry the air filter with fire.
Do not run the air conditioner without the air filter

.

Do not open the inlet grill until fan stops completely.
Fan will continue rotating for a while by the law of inertia after operation is being stopped.

CAUTION

Pre-Season Care

See that there are no obstacles blocking the air inlet and air outlet of both indoor and outdoor units.
Make sure that the air filter is not dirty

.

Cut in the power supply switch 12 hours before starting run.

Post-Season Care

Operate the unit with FAN mode on a fair day for about half a day to dry the inside of the unit well.
Stop operation and turn of

f the power supply switch. Electric power is consumed even the air conditioner is in stop.

Clean the air filter and set it in the place.

Care and Cleaning of the unit

Clean with soft and dry cloth.
If it is very dirty

, dissolve neutral detergent in the lukewarm water and make the cloth wet with the water.

After wiping, clean off the detergent using clean water.

18

FOR PREPARATION OF HEATING("HOT KEEP")

"HOT KEEP"is operated in the following cases.

When heating is started:

In order to prevent blowing out of cool wind, the indoor unit fan stopped
according to the room temperature which heating operation is started. Wait
for approx. 2 to 3 minute, and the operation will be automatically changed
to the ordinary heating mode.

Defrosting operation (in the heating mode):

When it is liable to frost. the heating operation is stopped automatically
for 5 to 12 minutes once per approx. one hour, and defrosting is operated.
After defrosting is completed, operation mode is automatically changed
to ordinary heating operation.

When the room thermostat is actuated:

When room temperature increases and room temperature controller actu­ates, the fan speed is automatically changed to stop under low temperature
condition of indoor heat exchanger. When room temperature decreases,
air conditioner automatically changes over to ordinary heating operation.

WARMING OPERATION

Heat pump type warming

Defrosting operation

Atmospheric temperature and warming capacity

Period of warm-up

With the heat pump type warming, the mechanism of heat pump that concentrate heat of outdoor
air with the help of refrigerant to warm the indoor space, is utilized.

When a room is warmed with a heat pump type air conditioner, frost accumulates on the heat ex­changer of outdoor unit along with the drop of indoor temperature. Since the accumulated frost re­duces the effect of warming, it is necessery to automatically switch the operation to the defrosting
mode. During the defrosting operation, heating operation is interrupted.

Warming capacity of heat pump type air conditioner decreases along with the
drop of outdoor temperature.
When the warming capacity is not sufficient, it is recommended to use another
heating implement.

Since the heat pump type air conditioner employs a method to circulate warm
winds to warm the entire space of a room, it takes time before the room tem­perature rises.
It is recommendable to start the operation a little earlier in a very cold morning.

19

IS THE UNIT INSTALLED CORRECTLY

For inspection and maintenance

When you change your address or the installation place

Electric work

Confirm the following items for safe and comfortable use of air conditioner.
The installation work is to be burden on the sales dealer, and do not conduct it by yourself.

Installation place

Avoid installing the air conditioner
near the place where possibility of
inflammable gas leakage exists.

Install the unit at well ventilated
place.

Install the air conditioner firmly on
the foundation that can fully support
the weight of the unit.

If not, it may cause vibration or noise.

If some obstacle exist, it may cause
capacity reduction or noise increase.

Explosion (Ignition) may occur.

Select the place so as not to annoy
neighbor with the hot air or noise.

Snow protection work is necessary
where outdoor unit is blocked up
by snow.

It is advisable not to install the air con­ditioner at the following special place.
It may cause malfunction, consult the
sales dealer when you have to install
the unit on such a place.

The place where corrosive gas generates
(Hot spring area etc.)
The place where salt breeze blows
(Seaside etc.)
The place where dense soot smoke exists
The place where humidity is extraordina­rily high
The place where near the machine which
radiates the electromagnetic wave
The place where voltage variation is con­siderably large

For details consult your sales dealer.

The electric work must be burden on the authorized engineer with qualification for electric work and
grounding work, and the work must be conducted in accordance with electric equipment technical standard.

The power source for the unit is to be of exclusive use.
An earth leakage breaker should be installed.(This is necessary to prevent electric shock.)
The unit must be grounded.

Special technology is required for removal or reinstallation of air conditioner, consult the sales dealer.
Besides, construction expense is charged for removal or reinstallation.

The capacity of air conditioner will decrease by contamination of inside of unit when it is used for about
three years although depending upon the circumstances under which it is used, and so in addition to the
usual maintenance service, special inspection/maintenance service is necessary. It is recommended to
make a maintenance contract (charged) by consulting your sales dealer.

INSTALLATION MANUAL FOR WIRE CONTROLLER

20

1. Remove upper part of wire controller

Remove upper part of wire controller
by press.

2. Install wire controller

(1) For exposed installation,
use 2 wood screws (accessory).
(2) For recessed installation,
use 2 wood screws (accessory).

Note

Try as far as possible a flat surface for installation. Don't use excessive
force when tightening screws, or lower part might got deformed.

PCB is mounted on lower part of wire
controller, be careful not to damage it.

Lower part of wire
controller

Upper part of wire
controller

INSTALLATION MANUAL FOR WIRE CONTROLLER

21

3. Indoor unit wiring

Connect terminals (A,B,C,D) on lower
part of wire controller to terminals (A,
B,C,D) on PCB of indoor unit.

Hint

When make wiring, please keep
a distance between wires and
power supply cord.

Hint

Tread surface of the terminal well so that
shielding may not contact other part.

Cord kind

Size

Shield wire (4 core) (refer to Hint 3,4)

0.33mm

2

Wire size

4. Replace the upper part of wire controller

Hint

Be careful not to press the wiring.

1. Switch box and cord for wiring are not supplied.

2. Don't touch PCB with hand.

Use shielede wires for telecommunication
between wire controller and indoor unit;
indoor unit and outdoor unit. Ground the
shield on one side.
Otherwise misoperation because of
noise may occur.
Signal wire is self-provided.

Shielded wire

ground

Lower part of
wire controller

A B C D

Upper part of
wire controller

wiring from here

INSTALLATION MANUAL FOR OUTDOOR UNIT

22

Edging

(2) Installation where the area with strong winds.

Install the unit so that the air outlet section of the unit must NOT be faced
toward wind direction.

(1) Open space requirement around the unit

2. Selection of the place of installation

1. Accessories

"Edging" for protection of electric wires from an
opening edge.

Select the place of installation satisfying the following conditions and, at the same time, obtain a consent
from the client or user.

Place where air circulates.
Place free from heat radiation from other heat sources.
Place where drain water may be discharged.
Place where noise and hot air may not disturb the neighborhood.
Place where there is not heavy snowfall in the winter time.
Place where obstacles do not exist near the air inlet and air outlet .
Place where the air outlet may not be exposed to a strong wind.
Place surrounded at four sides are not suitable for installation. A 1m or more of overhead space is
needed for the unit.
Mount guide-louvers to place where short-circuit is a possibility.
When installing several units, secure sufficient suction space to avoid short circuiting.

<Heat Pump model/Cooling Only model >

WARNING

BE SURE TO READ THESE INSTRUCTIONS CAREFULLY BEFORE BEGINNING
INSTALLATION. FAILURE TO FOLLOW THESE INSTRUCTIONS COULD CAUSE SERIOUS
INJURY OR DEATH, EQUIPMENT MALFUNCTION AND/OR PROPERTY DAMAGE.
BE SURE TO READ INSTALLATION MANUAL FOR INDOOR UNIT WITH THIS MANUAL.

Wind direction

NO

Unit

Concrete foundation

Anchor bolt

To fix by bolts

Anchor bolt

Concrete foundation

Unit

Concrete foundation

Foundation anchor

Note (1) Give enough room for the concrete
foundation to fix by anchor bolts.

(a)

Note (1) Place the concrete foundation deep enough.

Install the unit so that the angle of inclination must be less than 3 degrees.

3. Installation of outdoor unit

Fix the unit in a proper way according to the condition of a place where it is installed by referring to the following .

(1) Installation

L2

L3

L1

500

(Servicing
space)

Air outlet

Air inlet

Air
inlet

Case

Distance

Unit: mm

open

open

open

500

150

150

300

300

0

L1
L2
L3

I

II

III

INSTALLATION MANUAL FOR OUTDOOR UNIT

23

Open

Hexagon wrench
(attachment)

(1) Outline piping

4. Refrigerant piping

(2) Piping size

(3) Limitations for one way piping length and vertical height difference.

One way piping length: less than 30m (for 24,28 series).
less than 50m (for 36,42 series).
V

ertical height difference: Less than 15m (for 24,28 series).

less than 30m (for 36,42 series).

(4) Air purge

b. For 36,42 series.
Carry out the air pur

ge of the indoor unit and refrigerant piping by vacuuming.

Procedures:

1) Tighten all the flare nuts of the piping on the side of indoor and outdoor units so that there is no leakage.

2) Carry out vacuuming from the service valve char

ge port with the service valves (both liquid and gas side)

of the outdoor unit fully closed.

3) After vacuuming, remove the cap nut for the valve stem, and tighten the cap nuts (cap nuts for valve stem
and charge port) with service valve (both liquid and gas) fully opened.

1) Remove the hexagonal cap nut.

2) Operate the valve using a hexagonal wrench to open by left turn
and to close by right turn.

3) T

ighten the hexagonal cap nut after the piping works.

(5) Method of opening and closing service valve of outdoor unit

90*0.5

Outdoor
unit

Service valve

Flare connection

Check joint

Gas pipe

Liquid
pipe

Flare connection

Indoor
unit

Model

Gas piping

Liquid piping

19 05(3/4")x1 0mm
9 52(3/8")x0 8mm

15 88(5/8")x1 0mm
9 52(3/8")x0 8mm

Install the removed flared nuts to the pipes to be connected,
then flare the pipes.

Precautions for refrigerant piping

Do not twist or crush piping.
Be sure that no dust is mixed in piping.
Bend piping with as wide angle as possible.
Keep insulating both gas and liquid piping.
Check flare-connected area for gas leakage.

a. For 24,28 series.
Purge air out of indoor unit and piping as shown in the Fig.
(1) Remove the valve cap on 2-way valve in outdoor unit.
(2) Loosen by 1-1.5 turn the flare nut of gas pipe, which is connected
to 3-way valve.
(3) Loosen the valve rod of 2-way valve by 90 degrees (use a hexagon
wrench) for about 15 seconds, air will be pushed out from flare nut
on gas pipe.
(4) Open 2-way and 3-way valves using specified torque.
(5) Tighten the caps on the valves with specified torque.
(6) Conduct gas leakage using gas leakage detector or soap water.

90

Flare nut

Gas pipe
15 88mm(5/8")

Liquid pipe
9 52mm(3/8")

When additional refrigerant piping is necessary, first purge air out of connecting pipe by external gas,
then drive out the excessive refrigerant by pur

ging method.
Brand new unit is charged 80g more refrigerant than spec. This is only for first installation to purgeair in
the indoor unit and connecting pipe.

Note:

36,42 series 24,28 series

30mA

INSTALLATION MANUAL FOR OUTDOOR UNIT

24

(6) Additional charge of refrigerant

5. Electric wiring

Outdoor unit is precharged at a factory for the piping length up to 5m. Additional charge is not required
up to 5m.

Notes (i) Basic refrigerant charge amount means refrigerant amount when refrigerant piping length is 5m.
(ii) When the refrigerant piping length exceeds the length that additional refrigerant charge is not
required, charge additional refrigerant based on to the calculated amount of refrigerant per unit
piping length.

Example of additional charge amount calculation

Calculate the additional charge amount when the piping length is 25 m.

Additional charge amount of refrigerant =0.70kg(Calculate the amount in any case.)

WARNING

DANGER OF BODILY INJURY OR DEATH

TURN OFF ELECTRIC POWER AT CIRCUIT BREAKER OR POWER SOURCE BEFORE
MAKING ANY ELECTRIC CONNECTIONS. GROUND CONNECTIONS MUST BE
COMPLETED BEFORE MAKING LINE VOLTAGE CONNECTIONS.

(1) Selection of size of power supply and interconnecting wires.

Precautions for Electric wiring

Electric wiring work should be conducted only by authorized personnel.
Do not connect more than three wires to the terminal block. Always use round type crimped terminal
lugs with insulated grip on the ends of the wires.
Use copper conductor only.

Select wire sizes and circuit protection from table below. (This table shows 20 m length wires with
less than 2% voltage drop.)

(25 - 5 ) x 0.06 = 1.2

Additional charge amount (kg)

Additional charge amount per 1m (kg/m)

Length that additional refrigerant charge is not required (m)

Total length of the piping (one way) (m)

Heat
pump

Length that

additional

charge is not

required

Maximum

piping
length

Additional

charge

amount

(ii)

per meter

Basic

refrigerant

charge

amount

(i)

Factory charge amount

of refrigerant

Outdoor unit Indoor unit

Item

Model

3.44

3.52 0 0.06

5m

50m

(v)
(viii)

2.32 2.40

0

0.06

5m

(vii)
(viii)

30m

36,42 series

24,28 series

Item

Model

Phase

3

Switch breaker

(A)

Circuit breaker

Overcurrent protector

rated capacity (A)

Power source

wire size

(minimum)

30 20 2.5mm

2

1

40 26 4.0mm

2

36,42 series, 28 series

(380-400V,3N~,50Hz)

24,28,36 series (1PH,

220-230V~, 50Hz)

Switch

breaker

Earth leakage breaker

Leak

current

30 30mA

40

INSTALLATION MANUAL FOR OUTDOOR UNIT

25

(2) Wiring connection

6. Test run

WARNING

Make wiring to supply power to the outdoor unit, so that the power for the indoor unit is supplied by
*and*terminals.

DO NOT CONNECT THE NEUTRAL WIRE TO , OR PHASE. INTERCONNECT­ING WIRES MUST BE WIRED WITH SAME SYMBOLS ON THE TERMINALS OF BOTH
INDOOR AND OUTDOOR UNIT .INCORRECT WIRING CAUSE EQUIPMENT DAMAGE OR
A FIRE.

N R S

T

(3) Wiring procedure

1) Remove set screws on the side before taking off the front panel toward the direction shown in
figure.

2) Connect wires to the terminal block correctly and fix the wires with a wire clamp equipped near
by the terminal block.

3) Route the wires in a proper way and penetrate the wires through the opening for electric wiring
on the side panel.

Front panel

Opening for
electric wiring

(1) Before starting test run (for all Heat pump models)

Confirm whether the power source breaker (main switch) of the unit has been turned on for over 12
hrs to energize the crankcase heater in advance of operation.

(2) Test run

Run the unit continuously for about 30 minutes, and check the following.

Suction pressure at check joint of service valve for gas pipe.
Discharge pressure at check joint on the compressor discharge pipe.
Temperature difference between return air and supply air for indoor unit.

CAUTION

THIS UNIT WILL BE ST ARTED INST ANTLY WITHOUT "ON" OPERATION WHEN ELECTRIC
POWER IS SUPPLIED.
BE SURE TO EXECUTE "OFF" OPERATION BEFORE ELECTRIC POWER IS DISCONNECTED
FOR SERVICING.

This unit has a function of automatic restart system after recovering power stoppage.

1

TB1

1
2
3

TB2

1
2
3

TB

L

N

Outdoor
unit

Circuit breaker
Earth leakage

breaker

Indoor
unit

HIGH VOLTAGE

Interconnecting
wires

Interconnecting
wires

2

TB1

1
2
3

TB2

1
2
3

TB

R
S
T
N

Outdoor
unit

Circuit breaker
Earth leakage

breaker

Indoor
unit

HIGH VOLTAGE

(For 24,28 series (1PH,

220-230V~, 50Hz))

(For 36,42 series, 28 series

(380-400V,3N~,50Hz))

INSTALLATION MANUAL FOR INDOOR UNIT

26

1. Safety precautions

WARNING

Please read these "Safety Precautions" first then accurately execute the installation work.
Though the precautionary points indicated herein are divided under two headings,
and , those points which are related to the strong possibility of an installation done in error
resulting in death or serious injury are listed in the section. However, there is also a
possibility of serious consequences in relationship to the points listed in the section as well.
In either case, important safety related information is indicated, so by all means, properly observe all that is
mentioned.
After completing the installation, along with confirming that no abnormalities were seen from the operation
tests, please explain operating methods as well as maintenance methods to the user (customer) of this equipment,
based on the owner's manual.
Moreover, ask the customer to keep this sheet together with the owner's manual.

This system should be applied to places as office, restaurant, residence and the like. Application to inferior
environment such as engineering shop could cause equipment malfunction.
Please entrust installation to either the company which sold you the equipment or to a professional contractor.
Defects from improper installations can be the cause of water leakage, electric shocks and fires.
Execute the installation accurately, based on following the installation manual. Again, improper installations
can result in water leakage, electric shocks and fires.
When a large air-conditioning system is installed to a small room, it is necessary to have a prior planned
countermeasure for the rare case of a refrigerant leakage, to prevent the exceeding of threshold concentration.
In regards to preparing this countermeasure, consult with the company from which you perchased the equipment,
and make the installation accordingly. In the rare event that a refrigerant leakage and exceeding of threshold
concentration does occur, there is the danger of a resultant oxygen deficiency accident.
For installation, confirm that the installation site can sufficiently support heavy weight. When strength is
insufficient, injury can result from a falling of the unit.
Execute the prescribed installation construction to prepare for earthquakes and the strong winds of typhoons
and hurricanes, etc. Improper installations can result in accidents due to a violent falling over of the unit.
For electrical work, please see that a licensed electrician executes the work while following the safety standards
related to electrical equipment, and local regulations as well as the installation instructions, and that only
exclusive use circuits are used.
Insufficient power source circuit capacity and defective installation execution can be the cause of electric
shocks and fires.
Accurately connect wiring using the proper cable, and insure that the external force of the cable is not conducted
to the terminal connection part, through properly securing it. Improper connection or securing can result in
heat generation or fire.
Take care that wiring does not rise upward, and accurately install the lid/service panel. Its improper installation
can also result in heat generation or fire.
When setting up or moving the location of the air conditioner, do not mix air etc. or anything other than the
designated refrigerant (R22) within the refrigeration cycle.
Rupture and injury caused by abnormal high pressure can result from such mixing.
Always use accessory parts and authorized parts for installation construction. Using parts not authorized by
this company can result in water leakage, electric shock, fire and refrigerant leakage.

CAUTION

WARNING

WARNING

CAUTION

CAUTION

Execute proper grounding. Do not connect the ground wire to a gas pipe, water pipe, lightning rod or a
telephone ground wire. Improper placement of ground wires can result in electric shock.
The installation of an earth leakage breaker is necessary depending on the established location of the unit.
Not installing an earth leakage breaker may result in electric shock.
Do not install the unit where there is a concern about leakage of combustible gas.
The rare event of leaked gas collecting around the unit could result in an outbreak of fire.
For the drain pipe, follow the installation manual to insure that it allows proper drainage and thermally insulate
it to prevent condensation. Inadequate plumbing can result in water leakage and water damage to interior
items.

INSTALLATION MANUAL FOR INDOOR UNIT

27

NOTICE

All Wiring of this installation must comply with NATIONAL, STATE AND LOCAL REGULATIONS. These
instructions do not cover all variations for every kind of installation circumstance. Should further information be
desired or should particular problems occur, the matter should be referred to your local distributor.

WARNING

BE SURE TO READ THESE INSTRUCTIONS CAREFULLY BEFORE BEGINNING INSTALLATION. FAI­LURE TO FOLLOW THESE INSTRUCTIONS COULD CAUSE SERIOUS INJURY OR DEATH, EQUIPMENT
MALFUNCTION AND/OR PROPERTY DAMAGE.

(1) Preparation of indoor unit

Before or during the installation of the unit, assemble necessary optional panel etc. depending on the
specific type.

(2) Select places for installation satisfying following conditions and at the same time obtain the
consent on the part of your client user.

(a) Places where chilled or heated air circulates freely.
When the installation height exceeds 3m warmed air stays close to the ceiling. In such cases, suggest
your client users to install air circulators.
(b) Places where perfect drainage can be prepared and sufficient drainage.
(c) Places free from air disturbances to the suction port and blowout hole of the indoor unit, places
where the fire alarm may not malfunction or short-circuit.
(d) Places with the environmental dew-point temperature is lower than 28 and the relative
humidity is less than 80 %.
(When installing at a place under a high humidity environment, pay sufficient attention to the
prevention of dewing such as thermal insulation of the unit. )
(e) Ceiling height shall have the following height.

(3) Avoid installation and use at those places listed below.

(a) Places exposed to oil splashes or steam (e.g. kitchens and machine plants).
Installation and use at such places incur deteriorations in the performance or corrosion with the
heat exchanger or damage in molded synthetic resin parts.
(b) Places where corrosive gas (such as sulfurous acid gas) or inflammable gas (thinner, gasoline,
etc) in generated or remains. Installation and use at such places cause corrosion in the heat exchanger
and damage in molded synthetic resin parts.
(c) Places adjacent to equipment generating electromagnetic waves or high-frequency waves such as
in hospitals.
Generated noise may cause malfunctioning of the controller.

Combination
with silent
panel

416mm 366mm

50 or more

Obstacle

100 or
more

100 or
more

1000 or more

Unit: mm

Installation space

36,42 series

24,28 series

C

INSTALLATION MANUAL FOR INDOOR UNIT

28

(4) Preparation for suspending the unit

(a) Size of hole at ceiling and position of hanging bolts

<Combination with silent panel>

57

A

B

C

(Hanging bolt position)

(Ceiling hole size)

(Panel dimensions)

137

30

30

(Ceiling ~ panel
wrap dimensions)

(Ceiling ~ panel

wrap dimensions)

(Hanging bolt position)

(Ceiling hole size)

(Panel dimensions)

75

545

690

750

70

(Pipe co-

nnection side)

(b) Hanger bolts installation

Use care of the piping direction when the unit is installed.

Hanging bolt M10

Hole-in anchor
Hole-in plug

Insert

Concrete

Dimensions

A

Unit: mm

B C

1406 1600

1660

986 1180

1240

Model

36,42 series

24,28 series

INSTALLATION MANUAL FOR INDOOR UNIT

29

(5) Installation of indoor unit

Fix the indoor unit to the hanger bolts.
If required, it is possible to suspend the unit to the beam, etc.
Directly by use of the bolts without using the hanger bolts.

When the dimensions of main unit and ceiling holes does not match, it can be adjusted with the slot
holes of hanging bracket.

Note

Adjusting to the levelness

(a) Adjust the out-of levelness using a level or by
the following method.

Make adjustment so that the relation between
the lower surface of the unit proper and water
level in the hose becomes as given below

.

(b) Unless the adjustment to the levelness is made properly, malfunctioning or failure of the float
switch may occur

.

Tap selection on blower unit

(When the high performance filter is used.)

Taps of blower unit are set at the standard selection at the shipping from factory. Where the static
pr

essure is raised by employing such option as the high performance filter, etc., change the connection

of connectors provided at the flank of control box as shown below.

(6) Drain Piping

(a) Drain piping should always be in a downhill grade (1/50~1/100) and avoid riding across an
elevation or making traps.

When connecting the drain pipe to unit, pay suffcient
attention not to apply excess force to the
piping on the unit side.

Also, fix the piping at a

point as close as possible to the unit.
For drain pipe, use hard PVC general purpose pipe

VP-25(I.D.1") which can be purchased locally

. When
connecting, insert a PVC pipe end securely into the
drain socket before tightening securely using the
attached drain hose and clamp. Adhesive must not
be used connection of the drain socket and drain
hose (accessory).

Drain hose

Stage
dif

ference

part

Drain socket

Drain socket

Main unit

VP 25 joint
(field purchased)

Pipe cover(large)
[for insulation]
(accessory)

VP 25
(field purchased)

Pipe cover
[for insulation]
(field purchased)

Drain hose
(accessory)

Pipe cover(small)
[for insulation]
(accessory)

Clamp
(accessory)

Adhesion

PVC hose

Piping side

Supply water

Water level

0~5 mm

(0~0.2")

Bring the piping side slightly lower.

Hanging bolt

M10 nut

Main unit

M10 washer

M10 spring washer

Do not pipe under water

Keep free from traps

Avoid riding across an elevation

Air vent

Inproper pipingGood piping

1 5m ~ 2m

Suspension
bolts

Heat
insulation

A downhill grade
of 1/100 or more

(b)

(c)

Red

Yellow

White

Standard tap (at shipping) High speed tap

Black

White

Connector white

Connector white

Control box side

Moter side

Moter side

Red

Blue

Red

Yellow

White

Blue

Red

Yellow

White
Blue

White
Blue

Red

INSTALLATION MANUAL FOR INDOOR UNIT

30

VP 30

Secure the elevation as high as possible
(approx. 100 mm)

A downhill grade of
1/100 or more

Drain hose

Joint for VP 25
(Local procurement)

600

(Maximum local drain up dimension)

Right overhead

290~325mm

Attached drain hose clamp

Drain piping

Main unit

Drain situation can be checked with transparent socket

Remove grommet
Make sure to install
it back after test

Insert water supply hose
for 20 mm ~ 30 mm to
supply water
(Insert hose facing
toward bottom )

Pour water into a convex joint

When constructing drain piping for several units, position the
common pipe about 100 mm below the drain outlet of each
unit as shown in the sketch. Use

VP-30(11/4") or thicker pipe
for this purpose.
Be sure to provide heat insulation to hard PVC pipes of indoor
placement.
Do not ever provide an air vent.
The height of the drain head can be elevated up to a point 500
mm above the ceiling, and when an obstacle exists in the
ceiling space, elevate the piping to avoid the obstacle using
an elbow or corresponding gadget. When doing this, if the
stretch for the needed height is higher than 500 mm, the back­flow quantity of drain at the event of interruption of the
operation gets too much and it may cause overflow at the
drain pan. Therefore, make the height of the drain pipe within
the distance given in the sketch below.
Avoid positioning the drain piping outlet at a place where
generation of odor may be stimulated. Do not lead the drain
piping direct into a sewer from where sulfur gas may generate.

Drainage Test

Conduct a drainage test after completion of the electrical work.
During the trial, make sure that drain flows properly through the piping and that no water leaks
from connections.
In case of a new building, conduct the test before it is furnished with the ceiling.
Be sure to conduct this test even when the unit is installed in the heating season.

Procedures

Supply about 1000 cc of water to the unit through the air outlet using a feed water pump.
Check the drain while cooling operation.

(d)

(e)

(f)

(h)

(g)

1
2

3
4

1
2

(In the electrical work has not been completed,
connect a convex joint in the drain pipe connection
to provide a water inlet. Then, check if water
leaks from the piping system and that drain flows
through the drain pipe normally.)

INSTALLATION MANUAL FOR INDOOR UNIT

31

Exhaust hole

State seeing from top of unit

Side fresh air inlet

Rear fresh air inlet

Fig.1

Fig.2

(7) Installation work for air outlet ducts

Calculate the draft and external static pressure and select the length, shape and blowout.

A Blowout duct

2-spot, 3-spot and 4-spot with 200 type duct are the standard specifications. Determine the
number of spots based on following table.

Note (1) Shield the central blowout hole for 2-spot.
(2) Shield the blowout hole around the center for 3-spot.

Limit the difference in length between spots at less than 2:1.
Reduce the length of duct as much as possible.
Reduce the number of bends as much as possible. (Corner R should be as larger as possible.)

Use a band. etc. to connect the main unit and the blowout duct flange.
Conduct the duct installation work before finishing the ceiling.

(8) Connection of suction, exhaust ducts

(a) Duct connection position

i) Fresh air inlet

Inlet can be selected from the side or rear faces depending on the working conditions.
Use the rear fresh air inlet when the simultaneous intake and exhaust is conducted. (Side inlet
cannot be used.)

ii) Exhaust (Make sure to use also the suction.)

Use the side exhaust port.

Good exampleBad exampleBad example

Ceiling surface

Heat

insulation

Suction panel
(Silent panel)

Air conditioner main unit

B Special blowout
(Option)

A Blowout duct
(Optional or marketed item)

C

Hole for check

special inlet (option)
(with air filter)

inlet duct

(optional or

marketat item)

AIR PURGING METHOD (TO USE VACUUM PUMP)

32

3-way valve

3-way valve

2-way valve

2-way valve

7

Valve rod cap

Valve rod cap

7

Service port cap

7

7

Valve rod cap

Valve rod cap

7

Service port cap

7

For series 24,28

For series 36,42

If it does not stop gas leakage, discharge
whole refrigerants from the serice port
After flaring work again and vacuumize,
fill up prescribed refrigerant from the gas
cylinder

Detach the charge hose from the service port, open
2-way valve and 3-way Turn the valve rod
anticlockwise until hitting lightly

6

In case of gas leakage, tighten
parts of pipe connection If
leakage stops, then proceed
steps

6

No gas leakage?

5

4

Open the valve rod for the 2-way valve to and angle of
anticlockwise 90 degree
After 6 seconds later, close the 2-way valve and male
the inspection of gas leakage

3

Vacuumize for over 15min And check the level gauge
which should read -0 1 MPa (-76 cm Hg) at low
pressure side After the completion of vacuumizing,
close the handle 'Lo' in gaugemanifold and stop the
operation of the vacuum pump
Check the condition of the scale and hold it for 1-2min
If the scale-moves back in spite of tightening, make
flaring work again, the return to the beginning of 3

2

Open the handle at low in gaugemanifold, operate
vacuum pump If the scale-moves of gause (low)
reach vacuum condition in a moment, check 1 again

1

Detach the service port's cap of 3-way valve, the
valve rod's cap for 2-way valve and 3-way's, connect
the service port into the projection of charge hose
(low) for gaugemanifold Then connect the projection
of charge hose (center) for gaugemanifold into
vacuum pump

To use vacuum pump

3

Close

CAUTION:

If the refrigerant of the air conditioner leaks, it is necessary to make
all the refrigerant out, then charge the liquid refrigerant into air
conditioner according to the amount marked on the name plate

7

8

After attaching the each caps, check the gas leakage
around the caps

To prevent the gas leakage, turn the service port's
cap, the valve rod'd cap for 2-way valve and 3-way's
a lottle more than the point where the torque increases
suddenly

2

Open

AD28NAMBAA AU28NANBAA (HDU-28HA03/M(R1)), AD42NAMBAA AU42NAPBAA (HDU-42HA03/M(R1))
AD28NAMNAA

AU28NANNAA (HDU-28CA03/M(R1)), AD42NAMNAA AU42NAPNAA (HDU-42CA03/M(R1))
AD36NAMNAA AU36NAPNAA (HDU-36CA03/M(R1)), AD36NAMBAA AU42NAPBAA (HDU-36HA03/M(R1))
AD242AMNAA AU242ANNAA (HDU-24CA03/M(R1)) the refrigerant is R407C.

For

3-way valve

2-way valve

2-way valve

3-way valve

Open

90

Service port

90

4

90 for 6 sec.

90

Service port

90

4

90 for 6 sec.

Open

3-way valve

2-way valve

Liquid pipe 9.52mm

Gas pipe 19.05mm

2-way valve

3-way valve

6

6

6

6

For series 24,28

For series 36,42

For series 24,28

For series 36,42

Vacuum pump

Gaugemanifold

Vacuum pump

For series 24,28

3-way valve

2-way valve

Gaugemanifold

2-way valve

3-way valve

For series 36,42