Haier AU282AHERA User manual

ROOM AIR CONDITIONER
OUTDOOR UNIT
Before using the air conditioner,please read this anual carefully.
Please keep this anual properly for future use.
AU182AFERA
AU242AGERA
AU282AHERA
AU362AHERA
AU36NAHERA
INSTALLATION INSTRUCTIONS
AU122AEERA
DC INVERTER
No. 0010576506E
AU362AIERA
AU422AIERA
AU48NAIERA
AU522AIERA
AU60NAIERA

CONTENTS
Name of Part ------------------------------------------------------------------1
Safety Caution --------------------------------------------------------------2-7
Read Before In tallation--------------------------------------------------8-12
In tallation Procedure---------------------------------------------------13-24

Na e of Parts
Air inlet
Air outlet
(In ide of unit)
Co pressor
Air inlet
Air outlet
(In ide of unit)
Co pressor
1
AU182AFERA AU242AGERA
AU122AEERA
Air inlet
Air outlet
(In ide of unit)
Co pressor
AU282AHERA
AU362AHERA
AU36NAHERA
AU362AIERA
AU422AIERA
AU48NAIERA
AU522AIERA
AU60NAIERA
Air inlet
Air outlet
(In ide of unit)
Co pressor

Be ure to conform with the following important Safety Caution .
Safety Cautions
Carefully read the following infor ation in order to operate the air conditioner
correctly.
WARNING!
If any abnor al pheno ena is found
(e. g.s ell of firing), please cut off the
power supply i ediately, and contact
the dealer to find out the handling
ethod.
Don't dis antle the outlet of the
outdoor unit.
The expo ure of fan i very dangerou
whichmay harm human being .
Sy bols used in the illustrations
:Indicate an action that mu t be avoided.
:Indicate that important in truction mu t be followed.
:Indicate a part which mu t be grounded.
:Beware of electric hock (Thi umbol i di played on the main unit label.)
After reading this handbook, hand it over to those who will be using the unit.
The user of the unit should keep this a ual at hand and ake it available to those who will
be perfor ing repairs or relocating the unit.
Also, ake it available to the new user when the user changes hands.
Below are li ted three kind of Safety Caution and Sugge tion .
Incorrect operation may re ult in evere con equence of death or eriou injurie .
WARNING!
CAUTION! Incorrect operation may re ult in injurie or machine damage ; in ome ca e may
cau e eriou con equence .
INSTRUCTIONS:The e information can en ure the correct operation of the machine.
witch
off
In uch ca e, to continue u ing the
conditioner will damage the conditioner,
and may cau e electrical hock or fire
hazard.
Incorrect maintenance and repairment
may cau e water leak, electrical hock
and fire hazard.
When need aintenance and repair ent,
call dealer to handle it.
After a long ti e use of air-conditioner
the base should be checked for any
da ages.
If the damaged ba e i not repaired, the
unit may fall down and cau e accident .
2
!

Air-conditioner can't be installed in
the environ ent with infla able
gases because the infla able gases
near to air-conditioner ay cause fire
hazard.
Connect earthing wire.
Use discharge pipe correctly to ensure
efficient discharge.
Earthing wire hould not be con-
nected to the ga pipe, water pipe,
lightning rod or phone line, in-
correct earthing may cau e hock.
Incorrect pipe u e may cau e water
leaking.
Earthing
Safety Cautions
WARNING!
Installed electrical-leaking circuit
breaker.
It ea ily cau e electrical hock without
circuit breaker.
Please let the dealer be responsible for
installing the conditioner.
Incorrect in tallation may cau e water
leak, electrical hock and fire hazard.
Call the dealer to take easures to
prevent the refrigerant fro leaking.
If conditioner i in talled in a mall
room be ure to take every mea ure in
order to prevent uffocation accident
even in ca e of refrigerant leakage.
When conditioner is deinstalled or
reinstalled dealer should be
responsible for the .
Incorrect in tallation may cau e water
leaking, electrical hock and fire hazard.
No goods or nobody is per itted to
placed on or stand on outdoor unit.
The falling of good and people may
cau e accident .
Don't operate the air-conditioner with
da p hands.
Otherwi e will be hocked.
Only use correctly-typed fuse.
May not u e wire or any other material
replacing fu e, other-wi e may cau e
fault or fire accident .
3

Safety Cautions
Warning !
Have the unit professionally installed.
Improper in tallation by an unqualified per on
may re ult in water leak, electric hock, or fire.
Be sure to carefully follow each step in this
handbook when installing the unit.
Improper in tallation may re ult in water leak,
electric hock, moke or fire.
Have all electrical work perfor ed by a
licensed electrician according to the local
regulations and the instructions given in
this anual. Secure a circuit designated
exclusively to the unit.
Place the unit on a stable, level surface that
withstands the weight of the unit to prevent
the unit fro tipping over or falling causing
injury as a result.
Only use specified cables for wiring.Securely
connect each cable, and ake sure that the
cables are not straining the ter inals.
Cable not connected ecurely and properly may
generate heat and cau e fire.
Take necessary safety easures against
typhoons and earthquakes to prevent the
unit fro falling over.
Do not ake any changes or odifications
to the unit. In case of proble s, consult the
dealer.
If repair are not made properly, the unit may
leak water and pre ent a ri k of electric hock, or
it may produce moke or cau e fire.
Improper in tallation or a lack of circuit capacity
may cau e the unit to malfunction or pre ent a
ri k of electric hock, moke,and fire.
Securely attach the ter inal cover(panel)
on the unit.
If in talled improperly, du t and/or water may
enter the unit and pre ent a ri k of electric hock,
moke, or fire.
Only use refrigerant R410A as indicated
on the unit when installing or relocating
the unit.
The u e of any other refrigerant or an
introduction of air into the unit circuit may
cau e the unit to run an abnormal cycle and
abnormal cycle and cau e the unit to bur t.
4

Safety Cautions
In the event of a refrigerant gas leak,
provide adequate ventilation to the roo .
Do not touch the fins on the heat exchanger
with bare hands:they are sharp and
dangerous.
If leaked refrigerant ga i expo ed to a heat
ource, noxiou ga e may form.
Direct expe ure to outdoor air may pre ent a
health hazard, and it may al o cau e food item
to deteriorate.
Do not try to defeat the safety features of
the devices, and do not change the settings.
Defeating the afety feature on the unit uch a
the pre ure witch and temperature witch or
u ing part other than the dealer or peciali t
may re ult in fire or explo ion.
When installing the unit in a s all roo ,
safeguard against hypoxia that results fro
leaked refrigerant reaching the threshold
level.
When relocating the air conditioner,
consult the dealer or a specialist.
Con ult the dealer for nece ary mea ure to take.
Improper in tallation may re ult in water leak,
electric hock, or fire.
After co pleting the service work, check
for a refrigerant gas leak.
If leaked ga refrigerant i expo ed to a heat
ource uch a fan heater, tove,and electric grill,
noxiou ga e may form.
Only use specified parts.
Have the unit profe ionally in talled.
Improper in tallation may cau e water leak,
electric hock, moke, or fire.
Precautions for handling Units for Use with R410A
Caution!
Do not use the existing refrigerant piping
The old refrigerant and refrigerator oil in the
exi ting piping contain a large amount of
chlorine, which will cau e the refrigerator oil in
the new unit to deteriorate.
R410A i a high-pre ure refrigerant,and the u e
of the exi ting piping may re ult in bur ting.
Keep the inner and outer surfaces of the
pipes clean and free of conta inants such
as sulfur, oxides, dust/dirt shaving particles,
oils,and oisture.
Contaminant in ide the refrigerant piping will
cau e the refrigerant oil to deteriorate.
Do not use the following tools that have
been used with the conventional
refrigerants. prepare tools that are for
exclusive use with R410A.
(Gauge anifold, charging hose, gas leak
detector,reverse-flow check valve,
refrigerant charge base,vacuu gauge,
and refrigerant recovery equip ent.)
If refrigerant and/or refrigerant oil left on the e
tool are mixed in with R410, or if water i
mixed with R410A, it will cau e the refrigerant
to deteriorate.
Since R410A doe not contain chlorine, ga -leak
detector for conventional refrigerator will not
work.
With All-Fresh type air cinditioners, outdoor
air ay be directly blown into the roo
upon ther o off. Take this into consideration
when installing the unit.
Use a vacuu pu p with a reverse-flow-
check valve.
If other type of valve are u ed, the vacuum
pump oil will flow back into the refrigerant cycle
and cau e the refrigerator oil to deteriorate.
Warning !
5

Safety Cautions
Caution!
Store the piping to be used during
installation indoors, and keep both ends of
the piping sealed until i ediately before
brazing.(keep elbows and other joints
wrapped in plastic.)
A large amount of mineral oil will cau e the
refrigerating machine oil to deteriorate.
Do not use a charging cylinder.
Exercise special care when handling the
tools.
An introduction of foreign object uch a du t,
dirt, or water into the refrigerant cycle will cau e
the refrigerating machine oil to deteriorate.
Only use R410A refrigerant.
The u e of refrigerant containing chlorine(i.e.
R22) will cau e the refrigerant to deteriorate.
Before Installing the Unit
Warning!
Do not install the unit in a place where there
is a possibility of fla able gas leak.
Leaked ga accumulated around the unit may
tart a fire.
When installing the unit in a hospital,take
necessary easures against noise.
High-frequency medical equipment may interfere
with the normal operation of the air conditioning
unit or the air conditioning unit may interfere
with the normal operation of the medical
equipment
Do not use the unit to preserve food,
ani als, plants,artifacts, or for other special
purposes.
The unit i not de igned to provide adepuate
condition to pre erve the quality of the e item .
When humidity level exceed 80% or when the
drainage y tem i clogged, indoor unit may drip
water.
In tallation of a centralized drainage y tem for
the outdoor unit may al o need to be con idered
to prevent water drip from the outdoor unit .
If du t, dirt, or water enter the refrigerant cycle,
it may cau e the oil in the unit to deteriorate or
may cau e the compre or to malfunction.
Use a s all a ount of ester oil,ether oil, or
alkylbenzene to coat flares and flange
connections.
Use lipuid refrigerant to charge the syste .
Charge the unit with ga refrigerant will cau e
the refrigerant in the cylinder to change it
compo ition and will lead to a drop in
performance
The u e of charging cylinder will change the
compo ition of the refrigerant and lead to power
lo .
Do not use the unit in an unusual
environ ent
The u e of the unit in the pre ence of a large
amount of oil, team,acid, alkaline olvent ,or
pecial type of pray may lead to a remarkable
drop in performance and/or malfunction and
pre ent a ri k of electric hock, moke, or fire.
The pre ence of organic olvent , corroded ga
( uch a ammonia, ulfur compound ,and acid
may cau e ga or water leak.)
Do not place the unit on or over things that
ay not get wet.
6

Safety Cautions
Caution!
If the wire are too taut, they may break or
generate heat and/or moke and cau e fire.
Use breakers and fuses (electrical current
breaker, re ote switch<switch+Type-B
fuse>, olded case circuit breaker) with a
proper current capacity.
The u e of large-capacity fu e , teel wire, or
copper wire may damage the unit or cau e moke
or fire.
Do not spray water on the air conditioners
or i erse the air conditioners in water.
Water on the unit pre ent a ri k of electric hock.
When installing draining pipes, follow the
instructions in the anual, and ake
sure that they properly drain water so as
to avoid dew condensation.
Thing uch a nail may be included in the
package. Di po e of them properly to prevent
injury.
Pla tic bag pre ent a choking hazard to children.
Tear up the pla tic bag before di po ing of them
to prevent accident .
Make sure the wires are not subject to
tension.
Install a breaker for current leakage at the
power source to avoid the risk of electric
shock.
Without a breaker for current leakage, there i a
ri k of electric hock, moke, or fire.
Properly dispose of the packing aterials.
Ground the unit.
Before installing(Relocating) the Unit or Perfor ing Electric Work
Do not connect the grounding on the unit to ga
pipe ,water pipe , lightning rod ,or the
grounding terminal of telephone . Improper
grounding pre ent a ri k of electric hock,
moke, fire, or the noi e cau ed by improper
grounding may cau e the unit to malfunction.
Periodically check the platfor on which
is placed for da age to prevent the unit
fro falling.
If the unit i left on a damaged plarform, it may
topple over, cau ing injury.
If not in talled properly, they may cau e water
leak and damage the furni hing .
Before the Test Run
Do not operate switches with wet hands to
avoid electric.
Do not touch the refrigerant pipes with
bare hands during and i ediately after
operation.
Depending on the tate of the refrigerant in the
y tem, certain part of the unit uch a the pipe
and compre or may become very cold or hot
and may ubject the per on to fro t bite or
burning.
Allow for at lea t five minute before turning off
the unit; otherwi e, the unit may leak water or
experience other problem .
Do not turn off the power i ediately
after stopping the unit.
Du t particle in the air may clog the y tem and
cau e malfunction.
Do not operate the unit without air filters.
Do not operated the unit without panels
and safety guards in their proper places.
They are there to keep the u er from injury from
accidentally touching rotating, high-tempreture
or high-voltage part .
7

Read Before Installation
Tool /Material U e Note
Gauge Manifold Evacuating,refrigerant charging 5.09MPa on the High-pre ure ide.
Charging Ho e Evacuating, refrigerant charging Ho e diameter larger than the
concentional one .
Refrigerant Recovery
Equipment
Refrigerant recovery
Refrigerant Cylinder Refrigerant charging Write down the refrigerant type.
Pink in color at the top of the cylinder.
Refrigerant Cylinder
Charging Port
Refrigerant charging Ho e diameter larger than the
conventional one .
Flare Nut Connecting the unit to piping U e Type-2 Flare nut .
8
CAUTION!
Ite s to Be Checked
<1>. Verify the type of refrigerant used by the unit to be serviced.
Refrigerant Type: R410A
<2>. Check the sy pto exhibited by the unit to be serviced.
Look in thi ercice handbook for ympeom relating to the refrigerant cycle.
<3>. Be sure to carefully read the Safety cautions at the beginning of this docu ent.
<4>. If there is a gas leak or if the re aining refrigerant is exposed to an open fla e, a
noxious gas hydrofluoric acid ay for . Keep workplace well ventilated.
Install new pipes i ediately after re oving old ones to keep oisture out of the
refrigerant circuit.
Chloride in so e types of refrigerants such as R22 will cause the refrigerating
achine oil to deteriorate.
Necessary Tools and Materials
Prepare the following tool and material nece ary for in talling and ervicing the unit.
[Necessary tools for use with R410A(Adaptability of tools that are for use with R22 and
R407C)]
1. To be used exclusively with R410A ( Not to be used if used with R22 or R407C )

Tool /Material U e Note
Ga leak detector Detection of ga leak The one for HFC type refrigerant
may be u ed.
Vacuum Pump Vacuum drying May be u ed if a rever e flow check
adaptor i attached.
Refrigerant Recovery
Equipment
Recovery of refrigerant May be u ed if de igned for u e with
R410A.
Flare Tool Flare machining of piping Chage have been made in the flare
machining dimen ion.Refer to the
next page.
Tool /Material U e Note
Vacuum Pump with a
Check valve
Vacuum drying
Bender Bending pipe
Pipe Cutter Cutting pipe
Torque Wrench Tightening flare nut Only 12.70 (1/2'') and 15.88(5/8'')
have a larger flare machining
dimen ion.
Welder and Nitrogen
Cylinder
Welding pipe
Refrigerant Charging
Meter
Refrigerant charging
Vacuum Gauze Checking vacuum degree
Tool /Material U e Note
Charging Cylinder Refrigerant Charging
Mu t not be u ed with R410-type unit .
Maximum Operation Pre ure Applicable Refrigerant
3.4MPa R22, R407C
4.15MPa R410A
* U e pipe that meet the local tandard .
Read Before Installation
9
2. Tools and aterials that ay be used with R410 with so e restrictions
3. Tools and aterials that are used with R22 or R407C that can also be used with
R410A
4. Tool and aterials that ust not used with R410A
Tools for R410A ust be handled with special care; keep oisture and dust fro
entering the cycle.
Piping Materials
<Types of Copper Pipes (Reference)>

U e pipe made of pho phoru deoxidized copper.
Since the operation pre ure of the unit that u e R410A i higher than that of the unit for
u e with R22, u e pipe with at lea t the radial thickne pecified in the chart below.
(Pipe with a radial thickne of 0.7mm or le may not be u ed.)
* Although it wa po ible to u e type-O for pipe with a ize of up to 19.05(3/4") with
conventional refrigerant , u e type-1/2H pipe for unit that u e R410A.(Type-O pipe may
be u ed if the pipe ize i 19.05 and the radial thickne i 1.2t.)
* The table how the tandard in Japan .u ing thi table a a reference,choo e pipe that
meet the local tandard .
The flare machining dimen ion for unit that u e R410A i larger than tho e for unit that
u e R22 in order to increa e air tightne .
If a clutch type flare tool i u ed to machine flare on unit that u e R410A, make the
protruding part of the pipe between 1.0 and 1.5mm .Copper pipe gauge for adju ting the
length of pipe protru ion i u eful.
Read Before Installation
10
<Piping Materials/Radial Thickness>
<Flare Machining(type-O and OL only)>
Flare Machining Dimen ion(mm)
External dimen ion
of pipe Size Dimen ion A
R410A R22
6.35
9.52
12.7
15.88
19.05
1/4"
3/8"
1/2"
5/8"
3/4"
9.1
13.2
16.6
19.7
24.0
9.0
13.0
16.2
19.4
23.3
<Flare Nut>
Type-2 flare nut in tead of type-1 are u ed to increa e the trength. The ize of ome of
the flare nut have al o been changed.
Flare nut dimen ion(mm)
External dimen ion
of pipe Size Dimen ion B
R410A(Type2) R22(Type1)
6.35
9.52
12.7
15.88
19.05
1/4"
3/8"
1/2"
5/8"
3/4"
17.0
22.0
26.0
29.0
36.0
17.0
22.0
24.0
27.0
36.0
Size(mm) Radial Thickne (mm)Size(inch) Type
Type-O pipe
Type-1/2H or Hpipe
6.35
9.52
12.7
15.88
1/4''
3/8''
1/2''
5/8''
0.8t
0.8t
0.8t
1.0t
19.05 3/4'' 1.0t

1. Pre urize the equipment with nitrogen up to the de ign pre ure and then judge the
equipment' air tightne , taking temperature variation into account.
2. When inve tigating leakage location u ing a refrigerant, be ure to u e R410A.
3. En ure that R410A i in a liquid tate when charging.
1. U e of oxygen a the pre urized ga may cau e an explo ion.
2. Charging with R410A ga will lead the compo ition of the remaining refrigerant in the
cylinder to change and thi refrigerant can then not be u ed.
Read Before Installation
11
*The table how the tandard in Japan. U ing thi table a a reference, choo e pipe that
meet the local tandard .
Airtightness Test
No change from the conventional method .Note that a refrigerant leakage detector for R22 or
R407C cannot detect R410A leakage.
3. Required accuracy of the vacuum gauge
U e a vacuum gauge that can mea ure up to 650Pa. Do not u e a general gauge manifold
ince it cannot mea ure a vacuum of 650Pa.
Halide torch R22 or R407C leakage detector
NO NO
Ite s to be strictly observed :
Vacuu ing
Reasons :
1. Vacuum pump with check valve
A vacuum pump with a check valve i required to prevent the vacuum pump oil from flowing
back into the refrigerant circuit when the vacuum pump power i turned off (power failure).
It i al o po ible to attach a check valve to the actual vacuum pump afterward .
2. Standard degree of vacuum for the vacuum pump
U e a pump which reache 65Pa or below after 5 minute of operation.
In addition, be ure to u e a vacuum pump that ha been properly maintained and oiled u ing
the pecified oil. If the vacuum pump i not properly maintained, the degree of vacuum may
be too low.
4. Evacuating time
¡⁄Evacuate the equipment for 1 hour after 650Pa ha been reached.
¡⁄After envacuating, leave the equipment for 1 hour and make ure the that vacuum i not lo t.
5. Operating procedure when the vacuum pump i topped
In order to prevent a backflow of the vacuum pump oil, open the relief valve on the vacuum
pump ide or loo en the charge ho e to drawn in air before topping operation.
The ame operating procedure hould be u ed when u ing a vacuum pump with a check valve.

1. R410A i a p eudo-azeotropic refrigerant (boiling point R32= -52¡, R125= -49¡) and can
roughly be handled in the ame way a R22; however, be ure to fill the refrigerant from the
liquid ide, for doing o from the ga ide will omewhat change the compo ition of the
refrigerant in the cylinder.
Read Before Installation
12
Charging Refrigerant
R410A mu t be in a liquid tate when charging.
Reasons :
Note :
¡⁄ In the ca e of a cylinder with a yphon, liquid R410A i charged without turning the cylinder
up ide down. Check the type of cylinder before charging.
When refrigerant leak , additional refrigerant may be charged. (Add the refrigerant from the
liquid ide)
Re edies to be taken in case of a refrigerant leak
¡⁄ Becau e R410A i a imulated azeotropic refrigerant, it can be handled in almo t the ame
mammer a a ingle refrigerant uch a R22. Howerver,if the refrigerant i removed in the
vapor pha e , the compo ition of the refrigerant in the cylinder will omewhat change.
¡⁄ Remove the refrigerant in the liquid pha e. Additional refrigerant may be added in ca e of
a refrigerant leak.
Characteristics of the Conventional and the New Refrigerants

Note :
(1) Fix the part with crew
(2) Don't intake the trong wind directly to the
outlet air-flow hole.
(3) A one meter di tance hould be kept from the
unit top
(4) Don't block the urrounding of the unit with
undrie
Installation Procedure
2. Selection of the place of installation
1. Accessories
"Edging" for protection of electric wire from an
opening edge.
Select the place of in tallation ati fying the following condition and, at the
ame time, obtain a con ent from the client or u er.
Edging
Place where air circulate .
Place free from heat radiation from other heat ource .
Place where drain water may be di charged.
Place where noi e and hot air may not di turb the neighborhood.
Place where there i not heavy nowfall in the winter time.
Place where ob tacle do not exi t near the air inlet and air outlet .
Place where the air outlet may not be expo ed to a trong wind.
Place urrounded at four ide are not uitable for in tallation. A 1m or more
of overhead pace i needed for the unit.
Mount guide-louver to place where hort-circuit i a po ibility.
When in talling everal unit , ecure ufficient uction pace to avoid hort
circuiting.
Wind direction
NO
(2) Installation where the area with strong winds.
In tall the unit o that the air outlet ection of the unit mu t NOT be faced
toward wind direction.
(1) Open space require ent around the unit
L2
L3
L1
500
(Servicing
pace)
Air outlet
Air inlet
Air
inlet
Ca e
Di tance
Unit: mm
open open
open
500
150
150 300
300 300
L1
L2
L3
III III
Installation of outdoor unit
13

(2) Installation sketch of outdoor unit
(a) Concrete foundation
500
245
3. Installation of outdoor unit
Fix the unit in a proper way according to the condition of a place where it i
in talled by referring to the following .For example AU242AGERA.
(1) Installation
In tall the unit o that the angle of inclination mu t be le than 3 degree .
Installation of outdoor unit
14
Installation Procedure
AU122AEERA
810
680
AU182AFERA
Power Wiring Terminal
Power Wiring
Di tribution Hole
2
5
780
640
Power Wiring Terminal
Power Wiring
Di tribution Hole
Anchor bolt
Concrete foundation
Unit
To fix by bolt
(b) Foundation anchor
Concrete foundation
Unit
Anchor bolt

25
Installation of outdoor unit
15
Installation Procedure
AU282AHERA AU362AHERA AU36NAHERA
580
340
380
948
840
Power Wiring Terminal
Power Wiring
Di tribution Hole
580
288 315
AU242AGERA
Power Wiring Terminal
Power Wiring
Di tribution Hole
860
730
630
308 335

Installation of outdoor unit
16
Installation Procedure
AU362AIERA AU422AIERA AU48NAIERA AU522AIERA AU60NAIERA
580
340
380
948 Power wiring Terminal
25
1250
(1) Outline piping
4. Refrigerant piping
Outdoor
unit
Ga pipe
Liquid
pipe
Flare connection
Indoor
unit
3-way top valve
3-way top valve
Outdoor
unit
3-way top valve
Ga pipe
Liquid
pipe
Flare connection
Indoor
unit
Flare connection 2-way top valve
AU122AEERA AU182AFERA
AU242AGERA AU282AHERA AU362AHERA AU36NAHERA AU362AIERA
AU422AIERA AU48NAIERA AU522AIERA AU60NAIERA

(2) Piping size
(3) Li itations for one way piping length and vertical height difference.
Precaution for refrigerant piping
Do not twi t or cru h piping.
Be ure that no du t i mixed in piping.
Bend piping with a wide angle a po ible.
Keep in ulating both ga and liquid piping.
Check flare-connected area for ga leakage.
Connecting method (indoor unit)
Apply refrigerant oil at half union a large and flare nut.
To bend a pipe, give the roundne a po ible not to cru h
the pipe.
When connecting pipe, hold the pipe centre to centre then
crew nut on by hand, refer to Fig.
Be careful not to let foreign matter , uch a and enter
the pipe.
(4) Piping connection
Forced fa tening without centering
may damage the thread and cau e a
ga leakage.
Pipe diameter Fa tening torque
Liquid pipe 6.35mm
Ga pipe 15.88mm
Liquid pipe 9.52mm
Ga pipe 19.05mm
14.2-17.2N.m
61.8-75.4N.m
32.7-39.9N.m
97.2-118.6N.m
Ga pipe 12.7mm 49.5-60.3N.m
In tall the removed flare nut to
the pipe to be connected, then
flare the pipe .
Model
One way piping length Vertical height difference
(between indoor and outdoor)
le than 20 m
AU362AHERA
AU36NAHERA AU362AIERA
AU422AIERA AU48NAIERA
AU522AIERA AU60NAIERA
AU122AEERA
AU182AFERA
AU242AGERA AU282AHERA
Ga pipe 15.88x1.0mm
Liquid pipe
Ga pipe
9.52x0.8mm
19.05x1.0mm
Liquid pipe 9.52x0.8mm
Ga pipe 12.7x1.0mm
Liquid pipe 6.35x0.8mm
Refrigerant piping
17
Installation Procedure
90+0.5
AU422AIERA
AU48NAIERA
AU522AIERA
AU60NAIERA
AU242AGERA
AU282AHERA
AU362AHERA
AU36NAHERA
AU362AIERA
AU122AEERA
AU182AFERA
le than 30 m
le than 15 m
le than 15 m
le than 50 m le than 30 m

After fini hing connection of refrigerant pipe, it hall perform air tightne te t.
The air tightne te t adopt nitrogen tank to give pre ure according to the pipe connection
mode a the following figure hown.
The ga and liquid valve are all in clo e tate. In order to prevent the nitrogen entering the
circulation y tem of outdoor unit, tighten the valve rod before giving pre ure (both ga
and liquid valve rod ).
18
5. Air discharging ethod
CYLINDER
PRESSURE
GAUGE
Installation Procedure
Refrigerant piping
Outdoor
Completely tightened
Completely tightened
Flare part
Outdoor unit
Manhole
Di charging valve
3-way valve totally clo ed
(Ga ide)
Low pre ure peizometer
High pre ure peizometer
Meter eparator
Dropping valve
2-way valve totally clo ed
(Liquid ide)
Nitrogen tank
VL VH
Indoor unit
Indoor
Flare part
In the fir t to third te t tep , if the pre ure drop , check the leakage in each joint
u e en e of hearing, feeling and oap water, etc. method to find the leaking point.
After confirming the leaking point, welding it again or tighten the nut tightly again.
Checking the leaking point
Fir t tep: 0.3MPa (3.
0kg/cm
2g) pre urize
over 3 minute .
Second tep: 1.5Mpa
(15kg/cm2g) pre urize
over 3 minute . Large
leakage will be found.
Third tep: 3.0 MPa
(30kg/cm2g) pre urize
about 24 hour . Little
leakage will be found.
From pre urizing to 24 hour later, each 1¡ difference of ambient temperature
will make 0.01MPa(0.1kg/cm2g) pre ure change. It hall be corrected during te t.
Check if the pre ure drop
The pre ure doe not drop-pa ed
The pre ure drop -check the leaking point.
CYLINDER
OF
NITROGEN
SERVICE
HOUSE
LARGE
SLIP-ON
CONNECTOR
SWEAT
JOINT
TUBING
BRING
BRAZED
LINE
PRESSURE
GAUGE