Tadiran Telecom MINI-VRF User manual

)€TAIDIR,AI\T
MlNI-VRF . DC Variable Frequency Outdoor Unit
Installation Manual
YNI
WN
Wil.

Table of Contents
1 Safety Precaution
2Key Points for Construction Inspection
3 Installation of Outdoor Unit
4Installation of Connecting Pipe
5 Electrical Wiring
6 Trial Run
1
1
2
4
10
t4

This air conditioner is a comfortable unit. Dontt use it in some special places for machine rooms, precise instruments,
foods, plants, animals, artworks. etc,
The installation shall be done by the distributor or the professional staff. The installation staff must have related professional knowledge.
Misoperation in the self-installation will result in fire, electric shock, injury, water leak, etc.
Ifthe air conditioner is installed in a small room, some proper measures shall be taken to make sure that the concentration ofrefrigerant leak in the
room shall not exceed the critical level. For detailed meaiuis, please consult the distributor.
When connecting the power supply' comply with the regulations specified by the local power company. According to the law, the ground wire must
be connected. The misconnection ofthe ground wire will result in electric shock.
If the at conditioner needs to be moved or reinstalled, please inform the distributor or the professional stafi to operate. Inconect installation will
result in fire, electric shock, injury, water leak, etc.
The users axe not permitted to rebuild or repair the air conditioner by their om. Incorrect repair will result in fire, electric shock, injury, water leak,
etc.. Please inform *re distributor or the professional staffto repair.
Make sure the water drainage ditch is useable.
Make.sure a current leakage protection switch is equipped. The current leakage protection switch must be equipped. Ifnot, an electric shock will
take place.
It mush't be installed in any potential leakage location ofinflammable gas. In case ofthe inflammable gas leak around the outdoor unit, a lire takes
place.
Make sure the foundation and hoisting are fim and reliable. Ifnot, it will result in a falling accident.
Make sure all cables are correctly connected. The misconnection ofthe cables will result in the damage ofelectrical components.
Pre-instrallation exposure to water or other moistures will result in short circuit ofits electrical components.. Don't store it in any damp cellar or
expose it to rain or water.
In caseofthe refrigerant leaks during installation, the room must be ventilated at once. Ifthe leaked refrigerant is exposed to flame, some toxic
gases will be generated.
After installation, make sure the refrigerant is not leaked.
Ifthe refrigerant gas in the room is exposed to flame source, such as a heatet a stove or an electric cooker, some toxic gases will be generated..
A lightning protection device must be equipped according to national laws and regulations against the lightning strike.
Points for Construction fns
2.1 Anival ofgoods and open-case inspection
i) when receiving lhe machine, check if there is any damage in trmsportation. If any surface or intemal dmage is ibund, please infom the
trarsportation agency in a witten fom.
' 2) Afru receivittg the machine, check if the type, specification and, qumtity of the machine confom to the contract.
3) when unpacking the product, please keep tlre Manual well and check all accessories.
2.2 Refrigerant pipe
l) The-refrigerant pipe must be installed by the special refrigerant dishibutor made by our company (purchase).
2) The refrigerant pipe must use the pipe with specified diameter and wall thickness.
3) The welding of the copper pipe must be performed with nihogen-filled protection. Before welding, the copper pipe must be filled with the nitrogen of
0.2kgflcnt'. After welding, the nitrogen must be cut offuntil G copper pipe is thoroughly cooled down.
4) The refrigerant pipe must be treatcd with themal insulation.
5) After the refrigerant pipe is installed and before the air tightness test and vacuumization are performed, the indoor uit cannot be power-on.
2.3 Air tightness test
After the refrigerant pipe is instalied, nitrogen of40kgf/crf 1+.oula; must be filled from the gas side and liquid side simultaneously for 24-hour air
tightness test.
2.4 Vacuumizing
After the air tightness test, vacuumization (0.lMPa) must be perfomed from both thc gas side and the liquid side simultaneously.
2.5 Refilling of refrigerant
l) The refilling volune of refrigerant is calculated by the diarneter and length (actual length) of the pipe at the liquid sides of the indoor and outdoor
unlts.
2) The refilling volume of refiigermt, diameter and length (actual length) of liquid pipe, and height difference of the indoor and outdoor units shall be
recorded into the me confirmation table of the outdoor unit (on the cover plate of electronic conlol box) for future reference.
2.6 Electrical wiring
1) The power sryply capacity and wire diameter shall be selected according to the design manual. Generally, the power line ofthe air conditioner is
thicker thm rbat of rhe motor.
2) To prer'mt miscperatim of the airsnditioner, don't interlace or wind the power line (220-240v-l3g0v 3N-) wi*r the connecting wires (low-voltage
nires) of rhe indmr and mrdoor mis.
i t Tb€ iDdoor mir b pora-c affa air tighbss test md vacumization.
'- Trtdnr
I t ti{ rr '-l bc pafucd -n 6e orlldor uit is pos'r-on for more rhan 12 hours, or the system may be damaged.

3 Installation of Outdoor Unit
. The air conditioner must be installed in the place, which is strong enough to support the weight ofthe machine.
. If it is not strong enough, the machine may fall down and cause some personal injury.
. The special installation must be performed against strong wind or eadhquake.
. The falling-down because of inconect installation may cause some accidents.
J.l Selection of installation position
I ) Enough space for installation md maintenance.
2) No ban'ier at the air inlet and the air outlet and away from strong wind.
3) Dry and ventilated.
4) The flat supporting surface is able to bear the weight of the outdoor unit. The outdoor unit shall be horizontally installed, without my noise or
vibration.
5) Neighbors shall not be influenced by ruming noise and exhaust gas.
6) Without inflamable gas leak;
7) Convenient for installation of connecting pipe md electrical connection.
Dimensional drawing of outdoor unit (Unit: lm)
l) Model 08KW: IOKW:
Fig. 3-1 Dimension of Outdoor Unit
2) Model 12.5KW; 14KW; 16KW;18KW:
Fig. 3-2 Dimension of Outdoor Unit

3.4 Hoisting of outdoor unit
l) Don'tremoveanypackageuponhoisting.Tworopes(morethan8cm)shallbeusedtohoistthewell-packagedmachinestabtyandsafely.Ifthereisno
package or the packaging material is broken, use some backing plates or packaging materials to proteit the machine.
2) The outdoor unit shall be canied and hoisted vertically, within an inclination of less than 1 5 degrees. Care should be taken to safety during carrying
and hoisting the machine.
3) The gravity ofthe machine is not in the center, so be careful to hoist the machine.
4) Don't hold the suction inlet ofthe housing, or it will be deformed.
Installation md maintenance space of outdoor uit
l) Provide a firm and adequate foundation to:
O Prevent the outdoor unit from being sunken;
@ Prevent *re outdoor unit from abnormal noise.
2) Foundation types
O Steel structure
@ Concrete structure (Common practice is shown in the Fig. below)
Figure 3-3 space schematic diagram I for installation and maintenance of outdoor unit
J.)
n
V Airblow-offsuface
-77777-
Maintmmcc line and pipeline surface
Fixed by 4 Ml0 explosive bolts
Figure 3-4 space schematic diagram II for installation and maintenance of outdoor unit

3.6 Position md installation ofoutlet pipe
1) 08KW and IOKW( directly use the extemal stop valves to comect the pipes.
2) 12.5KWl4KW, l6KWandlSKWusethecomectingpipestogetinmdoutthroughtheknock-offholeofsheetmetal(asshominFig.3-5).
Thcaded comection
Liquid side connecting pipe
Gas side comectirg pipe
Welding
Fig. 3-5 Schematic Diagram for Connecting Pipe of Outdoor Unit
4 Installation of Connecting Pipe
Knock olT the opening of shect metal
For inlet and outlet ofthe connecting pipe
Table 4-1 Flaring Dimension of Connecting Pipe
Outer
Diameter
(lm)
A (mm)
g0 t{
/-R\
\r-+*r.Y
r'lf-
Maxiruurn Minimw
,b6.4 8.7 8.3
(D9.5 12.4 12.0
at2.7 15. B15. 4
o15.9 19.0 18. 6
4.i Refrigerant pipe ,
1) Flaring
Use a pipe cutter to cut the refrigerant pipe and a pipe expander to flare
X
"{t
W
a
I
OXX
90, *n'\o | **t\ |
wtn M
A UJ H
ltl
N
Fig. 4-1 Cutting Pipe of Connecting Pipe

Fastening nut
Align the connecting pipe, tighten it by hand, and then by a wrench.
4.2 Set refrigerant pipe dimension and pipe connecting steps
2) ConnectingmodeII
Fig. 4 -3 Connecting mode I
Table 4-2 Ttghtenlng Torque
14. 2-17. 2 (144-17 6 kgf.cm)
32. 7-39. I (333-407 kef.cm)
a72.7 I 49. 5-60. 3 (504-616 kgf'cm)
o15.9 I 61.8-75. 4G30-770 kgf.cm)
Fig. 4-2 Tightening Schenatic Diagram
To prevent the copper pipe from intemal oxidation upon welding, the copper pipe shall be filled with nitrogen. Otherwise, the oxide skin will block
the refrigoation system!
When fastening-the nut, too strong force will damage the flared socket, but too weak force will result in leakage. Please refer to the tightening
toroue in the table above to fasten the nuts!
Table 4-3 Definition of
Nme of Pip€$ Comecting Positioo of Pipe Code
Main pipe Pipe between the outdoor unit sd the fist distribuior at the ind@r uoit side L1
Main pipe of hdoor uit Pipe behind the fNt dishibutor at the indoor side ud iodirectly comected to
the indoor uit t'z-4
Btrch pipe of ind@r mit Pipe behird the distribulor ed directly connected to the iildoor unit A,b, c, d, e, f
DisAibutor comDonents of Pipe components to cm@t the main pipg frai! bruch pipe ud bmch pipe A,B,C,D,E
Connectins mode I
Fig.4 -4 Connecting mode II

All distributors must use our company's special distributors. Otherwise, it may cause severe fauls oftte system!
The indoor unit shall be equally installed on both sides ofthe U-type distributor.
4.3 Detemination of main pipe (Ll) diameter
Table 4-4 Diameter of Main Pipe
Capacity of Outd@r Unit (kW)
pipe
DiftensioD of Main Pipe ('m)
L r(30m L1)30n First disributor
Liquid pipe Gas pipe Liquid pipe G6 plpe
8/10 oq 52 @15.88 @9. 52 o15.88 SP_FQG_NO 2A
t2.5/t4/16 49.52 o15.88 (D9. 52 o19.05 S P-FQG_NO2A
l8 o9 52 @19.05 (D9.52 | O19.05 SP-FQG_NO 2A
4.4Determination of main pipe (Lr-L,) diameter
4.5 Allowable length and height difference of the.refrigerant pipe
l) Connecting mode 1
Table 4-5 Diameterl-J Dlameter ol PiPe
Length ofDoM E4uivalar Pipe
ofDownstream Indoor
Unit (kW) Dimension of main pipc of [email protected]
Liquid pip€ G6 ptF
w<6. 549.52 (D12.7 SP-FQG-NO 1 A
6.5<l{<16 49.52 o15.88 S P-FQG-NO2A
16<l{< 18 /o9.52 i o19. 05 SP-F8G_N O 2A
Eto the farthest pipc ofthe indoor uit
Equivalont length to the farthest pipe of the fist distributor
Fig. 4 -5 Connecting Mode I

2) Connectingmodell
Total Pipe Length
Length ofthe farftest pipe L
Equivaletrt length to the falthest pip€ ofrhe fist
dishibutor
Equivalent leDgth to the neorest distributor
Height differcnce betweeo the
indoor md outd@r eits
Height difference bctweetr the indoor uits
Direotion A
Fig.4 -5 Connecting Mode ll
Table 4-6 Diameter of pipe
L 1+la+Lt+Yo+Y5aa+b+c+d+e+f
LtL2+L3+L4+LS+f (comecmg noac I) {L1+L3+L5+f (6e*"cting mode rI)
L2+L3+L4+L5+f (connecring mode I) $L:*L5*f (connectiug nrode Il)
4.6.lnstallarion of distibutor
1) The dishibutor phall usi U-type or y-type, instead ofT_type.
2) Thedistributorshallbeinstalledhorizontalry,withthedeviationangleofnogreaterthan+10c
3) The distributor cannot be tumed directly, with the straight prpe ofno ress than 0.g meter.
r10'F
valot lsgth to the nercst dishibutor
€
6
length ro the farthest pipe ofte inaoof?nr
to dre farthesr pipe of the fi6t disributor
N3
N4
N6

4.7 Oilretumbendsettings
Comectirg io the sec@d stt of itrdool uit!
Outdoor unit (st)
OutdMuit(rd)
oil Etm b6d
Com@ting to the list set of hdoorunits
Fig. 4-7 Position of Oil ReturnBad Jfrc Eeight Direction
t
-{ - t'ig, 4-8 position of Oil Return Bend at the Horizontal Direction
4.8 Remove foreign materials in the pipeline.
1) The foreign n{aterials, whicb enter the refrigerant pipe during installation, shall be cleaned with high pressure nitrogen'
2) Don't connect with the indoor unit upon cleaning.
3) Use the nitogen irstead ofrefrigerant or flammable toxic gases like oxygen'
Air tightness test
l) After the refriserant pipe is installed and connected to. the indoor unit, and before the-co-nne-cting
'' ""*-J.ai" ift" rufi,"'. of the outdoor units, refill the nitrogen with the pressure of 40kgflcttti
simultaneously, mark the pressure value, and then perform 24-houf afu tightxess test.
2) If the pressure drops, recheck the leakage of all interfaces and then maintain the pressure for 24 hours
3) Don't connect witb the outdoor unit dudng maintaining tbe presswe'
oioes between the indoor and outdoor units are
?+.oup") from the gas side and the fluid side
4.9

l0Vacuumizing
1) Thevacuumpumphasthevacuurndegreeoflessthan-0.lMPaandtheairdisplacementofmorethan40l/min.
2) It is unnecessary to vacuumize the outdoor unit. Don't open the check valves at the gas side and the liquid side ofthe outdoor unit.
3) Makesurethevacuumpumpcandropupto-0.lMPawithin2hours;ifitfailstodropupto-0.lMpaafter3hours,checkmoistureorairleak.
4) The vacuum pump mirst have a check valve.
Comect the vacuum pump
Rutr the vacuum pmp (above 2 hours)
After dropping up to -0. 1 MPa, the vacum pMp keeps on ruming for 20-60 minutes,
Remain vacuum (above lh)
4.1 I Refilling volme of refiigerant
The refilling volume ofrefrigerant (R4l0A) is calculated according to the diameter and length ofthe pipe at the liquid side ofthe indoor and outdoor units.
Note: The R4 I 0A refrigerant must be weighed by an electronic scale and filled in the liquid state.
4.12 Stop valve instructions
I ) It is closed when leaving rhe factory;
2) Open the valve counterclockwise or clilsg the valve clo-ckwise with a 6mm socket head wrench:
3) After completing the operation, tighten the valve cover;'
4) R4l0Aspecialtoolshallbeusedtovacuumizethevalveand_f,rlltherefrigerantattheserviceentrance.Filltherefrigerantattheserviceentranceatthe
' gas side, and vacuumize the valve at the service entrance at the liquid sidE and the gas side simultaneously.
Refilling refrigerml
Liquid side
Fig.4-9 Stop Valve Instructions
l. Close the valve ofthe piessue gauge;
2. Discomect the pressurc gauge md the
pmp;
3. Close the vrcum pmp.
' Don't use tools and measuring apparatus using in different refrigerants or directly contacting the refrigerant.
. Don't exhaust air with refrigerant gas.
'Ifthevacuumdegreecannotreach-0.lMpa,recheckitsleakage, Ifnot,keepthevacuumpumponforl-2h.
Table 4-l Refilling Volume of Refrigerant

4.13 Thennal insulation ofpipe
l) Apply thermal insulation to the pipes at the gas side and the liquid side respectively;
2) Useclosed-cellthermatinsulationmaterials,withtheflameretardant$adeofBlandhightemperatureresistanceofl20C;
3) Outerdjameterof copperpipe<0 12,7 and thickness of thermal insulationcotton> l5mm; outerdiameterof copperpipe> 015.88 and
thi ckness of thennal insulation cotton 2 20mm,
4) The nutjoints ofthe indoor unit shall be performed thermal insulation
The power supplies for the indoor and outdoor units shall be separately designed.
The power supply must be designed with a sub-circuit, and equipped with a current leakage protector and a manual switch.
All indoor units in the same system shall be ananged on the same power circuit, and shall be tumed on/off the power simultaneously. It is not
allowed to equip each indoor unit with a power switch.
The connecting wire system and the refrigerant pipe system ofthe indoor unit shall be incorporated into the same system.
To reduce the interference, the indoor and outdoor communication cables shall use two-core or three-core shielded twisted-pair cables instead of
ordinary multi-core cables.
Conform to related national electrical standards.
Electrical wiring shall be done by a professionai electricim.
5 Electrical Wiring
5.1 0utdoor unit wiring
Ifneeded, t11e user can purchase a centralized controller, as shown in the dashed box. For the specific method ofinstallation, please contact your local
supplicr
Fig.5-1 Wiring and Control
Fig. 5-2 Electrical Wiring of Single-phase Outdoor Units
Table 5-1 Outdoor Unit Wiring
Signal Wire oflndoor/Outdoor Units (mm) (Signal Wirc of
three-core shielded cable 3x1.0 (two-core shielded cable 2x1.0)
5/14/16/1
10
Fig. 5-3 Electrical Wiring of Three-phase Outdoor Units

lvhen the signal line uses a two-core shielded cable, the shielding net shall be connected to "E ' of the terminal block. when the signal line uses a
tlree-core stieldeA cable, the shielding net shall be connected to the $ound'
Never connect the power line (shong lunent) to the terminal block ofthe signal line (weak cunent). otherwise, the powet board will be bumt out'
5.2 Indoor unit power supply wiring
Ind@r power suPPlY
Cllmt leakage Fot@tion
Mmual swilch
Iulction box
Fig, 5-4 Indoor Unit Power Supply \Yiring
When the power line is parallel to the signal line, please put the electrical wires into their own wire pipes, with proper wire spacing (10A or below:
5,3 Indoorunit signal line wiring
.; ' . Fig. 5-5 Indoor Unit Power Supply Wiring
If needed, the user can purchase a wire controller, as shown in the dashed box'
Wiring diagram
For electrical wiring diagram ofoutdoor unit, refer to the wiring diagram at the side oflhe right side plate ofthe outdoor unit'
Dialing setting ofmain control board
-------------\f
r-Y-n
H,T
-T-
r-J--.
'n:
5.4

Table 5-3 12. 5/14l16/18KW Dialing
Tabte 5-2 08/10KW Dialing
Diali4 Content SwitchNo. Dialing tllustration Set Value
sw3
nrlnnl
Irrrl
1 2 3 4l SEfting time l2 minutes
Starting time setting rnnn
!lrr
l1 2 ? 4Staning time 3 minutes
Ad&ess setting sw4+sw5
InN ill
tnnl
lrrl
11,
-:;.---l
li'Arl
l'v'I 0-15
FNt
Ei r-"--;--l
l{(-)it
| .i.d^ |
l6-31
M-t
rf-.--;-
l+'Gl;l
l,M^l 32-4',7
Fim
lrF
IT;
II
r -.--
l+'Gllrl
| ')=(^ |
48-63
Capaciry setting sw6 ro 8kw
NN'l
$l I okw
Dialing Content Switch No Dialing Illustration Set Value
Starting dme settng sw3
ffi;t
n
IStarling time 12 minutes
Nlt
t
UStaning tiDre 3 minutes
Address settlng sw4{ sw5
Fr sl
Eq l+'6rl
I ,)od^ |
0-15
InN";l
E! r-"-. -
l{F)il
| 'i.{^ |
l6-31
ru l+6rl
l,M^l 32-4',7
Ff tcl
lr_4 | 'dri' I
48-63
Crpacity sesing sw6
m12.5kw
Itt l4kw
rln
t!t I 6kw
ffi I 8la
5.6 Outdoor unit spot-check instructlons Instructions
Definition of opcration mode: O-OFF/Fan; 2:Cooling; 3-Heating; 4-Forced cooling'
Unit
Fault Code
E1
E2
HO
20-minute break at first ot 2-miDute break later
810
Table 5-4 Outdoor Unit
No, Spot-check Content NO, Spot{h€ck Content
Opening dcgtec of clectronic cxpansbo
valve = spoPcheck displaY !aLue / 6
Cment frequmcy / number of indoor uits (statrdby
disPlaY) 11
1Capacity of outdoor unit 1.2 AC transfomer cudenl
2Total capacity need of indoor unit LJ Sccondary side cmcnt
lnput AC voltage
Secondary side cunent - (spot-check display x 4)
3Total capacity needs of colrected host l4
4Operation mode (04) ID
5Actual running abiliry of ouldoor mlt l6 Number of indoor
6Gcars oflm (0-?) l7 Number of indoor unit working
Last fault protection codc (no fault display -)
7T2 / T2 B avclage temperature 18
8T3 temperatue ofoutdoor condenser l9 Control parunetels (only lbr use of development personnel)' display
Contsol pilameteas (only for use ofdevelopmenl penonnel)
9T4 elvironmental temper.atue 20
10 T5 exhaust tempqaNe 21
Conxnuication fault bet{'een the outdoor unit and the
Condenser pipe temperatwe sedsor fault
AC over-voltage / under-loltage protection
DSP and 0513 comunicalion failue
051 3 and 052Toommunication failure
H1

Fault Code Fault Contents Remark
H4 Display P6 protection for 3 times within 30 minules
H5 Display P2 Fotection for 3 times within 30 minutes z0{itrute break at fi6t or 2-minute break later
H6 Display P4 protection for 3 times within I 00 miniles Restore when powenng oo
H7 The decrease in number ofitrdoot uili1 Indoor units de lost for mole the 3 minutes. It cm't be
restored until nmrber of indoor units arc restoted
H9 Display P9 protoction tbr 2 times within I 0 minutes Restore when powoing on
H10 Display P3 protection for 3 times within 60 mitrutes Restore whd powering o0
H11 Display PIJ J'rotection for 2 limes within l0 rninutes Restorc when powering on
P1 Hi gh piessure protection
P2 Low presswe protection Display H5 after P2 protection for 3 times wilhin 30 minttes
P3 Vanous frequency over-crfr€ntproleclion
P4 Exhaust overheating protection Display H6 for 3 times within I 00 hinutes
P5 T3 high tcmpcralurc protection
P6 Module protection Display H4 after P6 protection for 3 times within 30 minutes
P9 DC far fault Display H9 after P9 protection for 2 times within 10 minutes
Pi0 Anti-t'?hoon prolection
P11 T2 high tenDerature protection
Pt2 Fault of the heating fm continuously working for 5 mintcs in area A
P13 Cwent dctcction cror protcctton 12. 5. 14, l6dd l8kw de eflective. 8 and l0kw have no such faults
LO DC comprcssor module fault
L1 DC bus low voltage protection
L2 DC bu high voltage prctection
L4 MCE fault / sync / closed loop
L5 Zqo speed protection
L7 Phasc sequenoe eror prolechon
L8 Protection when the speed chatrge oftuo
successive peiods exceeds 1sHz
L9 Protection ofspeed chdge (> l5Hz) for
lhe previous time and the next lime
6 Tlial Run
6.1 Inspection and confirmation before debugging
1) Check and make sure the refrigerating pipeline and comunication line comecting with the
refrigerating system. Otherwise, sorne running faults -occur. .
2) The power sripply voltage is within the'rated voltage of,t10%.
3) Check and make sure the power supply line and the conhol line are conectly connected.
4) Before power-on, make sule there is no short circuit.
5) Check ifall units have passed 24-hour nitrogen pressure-maintaining (40kgf/cm')) test.
6) Make sure the debugged system is fully vacuumized, dried and filled with the refrigerant as specified.
6.2 Preparation before debugging
l) Calculate the refilling volume ofrefrigerant for each set ofunits according to the length ofon-site liquid
2) Prepare lhe required refrigerant.
3) Prepare the system plan, system piping diagram and control wiring diagram.
4) Mark the set address codes on the system plan.
5) Tum on the power supply switch of the outdoor unit in advance, and make sure it
indoor and outdoor units ue comected with ths same
pipe
Fig. 6-1 Filling of Names of Connecting Systems
is power-on for more than 12 hours, so that the heater heats the
compressor o1l.
6) Fully open air pipe check valve, liquid pipe check valve md oil balance valve of the outdoor urit. If they me fully opened, the machine may be
damaged.
7) Check ifthe power supply phase sequence ofthe outdoor unit is conect.
8) Check if all dialing switches of the indoor and outdoor units are set according to the technical requirements of the product.
6.3 Filling of names of connecting systems
Room nme
Example: 2nd floor, firet
Remark: -2F-1A
13

When the multiple indoor units are arranged, in order to distinguish the connecting systems of indoor and outdoor units, all systems shall be named
respectively and recorded on the nameplate on the electronic control box cover ofthe outdoor unit.
6.4 Precautions against refrigerant leak
1) The refrigerant oftle air conditioner is harmless and nonflammable.
2) The room for the air conditioner shall have an appropriate space. In case of refrigerant leak, it cannot go beyond the critical concentration. In addition,
necessary measures can be taksn.
3) The critical gas concentration hannless to the human body is 0.3 kg/m'.
4) Confrm the critical concentration according to the following steps and take corresponding measures.
a) Calculate the filling volume ofrefrigerant (A[kg])
Volume of refrigerant = filling volume of refrigerant before delivery (see the nameplate) + refilling volume of reftigerant corresponding to the
length ofpipe
B) Calculate the indoor volume (B [m']) (by the minimum volume)
A [ke]
B [m, ] < Critical concentration:0' 3 [Kglm3]
Outdoor uit
Fig. G2 Refrigerant Leak
5) Measures against exceeding the critical concentration
a) To reduce the refrigerant concentration below the critical concentration, install a mechanical ventilation device (for fiequent ventilation).
b) Iffrequent ventilation cannot be performed, please install a leak waming device interlinked with the mechanical ventilation device.
iderlitrked with the mechaical ventilatio! device
0A+
I
I
/tr/f
Indoor unit
I
" trtf I
&
7tt
l\ 1J
/\
J \ )
()
Room of refrige@t leak
(Refiigmt is tully lcaked)
\ " *.*rofvenrilation
. (Ite feak waming dwig€ shall be instaled h the grthqing place ofrefiig€rmt.)
. ; Fig.6-3 Mechanical Ventilation Device
6.5 Handovertotheclient
l) Hand over the Use Manrial for the Indoor Unit and the lnstallation Manuhl for the Outdoor Unit to the client.
2) Explain the contents ofUse and Installation Manual to the client carefully.
I
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