
en
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1 - 2 . S P E C I F I C A T I O N S
1 - 1 . T H E F O L L O W I N G S H O U L D A L W A Y S B E O B S E R V E D F O R S A F E T Y
• B e su r e t o r e a d “ T HE FO L L O W IN G S HO U L D A L W A Y S B E O B S ER V ED FO R S A FET Y ” b e f o r e in st a llin g t h e a i r co n d i t i o n e r .
• Besuretoobservethewarningsandcautionsspeciedhereastheyincludeimportantitemsrelatedtosafety.
• A f t e r r e a d i n g t h i s m a n u a l , b e su r e t o ke e p i t t o g e t h e r w i t h t h e O P ER A T IN G IN S T R U CT IO N S f o r f u t u r e r e f e r e n ce .
R eq u i r ed T o o l s f o r I ns t a l l a t i o n
Phillipsscrewdriver
Level
S ca l e
U t i l i t y kn i f e o r sci sso r s
T o r q u e w r e n ch
W r e n ch (o r sp a n n e r )
5 / 3 2 in . (4 m m ) h e xa g o n a l
w r e n ch
Fl a r e t o o l f o r R 4 1 0 A
Ga u g e m a n i f o l d f o r R 4 1 0 A
V a cu u m p u m p f o r R 4 1 0 A
Ch a r g e h o se f o r R 4 1 0 A
P i p e cu t t e r w it h r e a m e r
ENGLISH
C O N T E N T S
1 . B EFO R EIN S T A L L A T IO N ............................................................1
2 . O U T DO O R U N IT IN S T A L L A T IO N ...............................................3
3 . FL A R IN G W O R K A N D P IP E CO N N ECT IO N . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4 . P U R GIN G P R O CEDU R ES , L EA K T ES T , A N D T ES T R U N . . . . . . . . . 6
5 . P U M P IN GDO W N ........................................................................7
M odel P o w e r su p p ly P i p e le n g t h a n d h e i g h t d i f f e r e n ce * 1 , * 2 , * 3 , * 4 , * 5 , * 6 , * 8
R a t e d V o l t a g e Fr e q u e n cy M a x. p i p e l e n g t h p e r i n d o o r u n i t /
f o r m u l t i- syst e m M a x. h e i g h t
d i f f e r e n ce M ax. no.ofbends perindoorunit/
f o r m u l t i syst e m R e f r ig e r a n t
a d j u st m e n t A * 7
M X Z - 2 C2 0 N A 4 2 0 8 / 2 3 0 V 6 0 Hz 8 2 f t . (2 5 m ) / 1 6 4 f t . (5 0 m ) 4 9 f t . (1 5 m ) 2 5 / 5 0 1 . 0 8 o z e a ch 5 f t .
(2 0 g / m )
*1Neverusepipeswiththicknesslessthanspecied.Thepressureresistance
willbeinsufcient.
* 2 U se a co p p e r p i p e o r a co p p e r - a l l o y se a m l e ss p i p e .
* 3 B e ca r e f u l n o t t o cr u sh o r b e n d t h e p ip e d u r i n g p i p e b e n d in g .
* 4 R e f r i g e r a n t p ip e b e n d in g r a d i u s m u st b e 4 in . (1 0 0 m m ) o r m o r e .
*5Insulationmaterial:Heatresistingfoamplastic0.045specicgravity
*6Besuretousetheinsulationofspeciedthickness.Excessivethicknessmay
causeincorrectinstallation ofthe indoorunitand insufcientthickness may
ca u se d e w d r i p p a g e .
■D o no t i ns t a l l t h e u ni t b y y o u r s el f ( u s er ) .
Incompleteinstallationcouldcausereorelectricshock,injuryduetotheunit
f a l l i n g , o r l e a ka g e o f w a t e r . Co n su l t t h e d e a l e r f r o m w h o m yo u p u r ch a se d t h e
unitoraqualiedinstaller.
■F o l l o w t h e i ns t r u c t i o ns d et a i l ed i n t h e i ns t a l l a t i o n m a nu a l .
Incompleteinstallationcouldcausereorelectricshock,injuryduetotheunit
f a l l i n g , o r l e a ka g e o f w a t e r .
■W h en i ns t a l l i ng t h e u ni t , u s e a p p r o p r i a t e p r o t ec t i v e eq u i p m ent a nd t o o l s
f o r s a f et y .
Fa i l u r e t o d o so co u l d ca u se i n j u r y.
■I ns t a l l t h e u ni t s ec u r el y i n a p l a c e t h a t c a n b ea r t h e w ei g h t o f t h e u ni t .
If t h e i n st a l l a t i o n l o ca t i o n ca n n o t b e a r t h e w e i g h t o f t h e u n i t , t h e u n it co u l d f a ll
ca u si n g i n j u r y.
■
P er f o r m el ec t r i c a l w o r k a c c o r d i ng t o t h e i ns t a l l a t i o n m a nu a l a nd b e s u r e t o u s e
a n ex c l u s i v e c i r c u i t . D o no t c o nnec t o t h er el ec t r i c a l a p p l i a nc es t o t h e c i r c u i t .
Ifthecapacityofthepowercircuitisinsufcientorthereisincompleteelectrical
work,itcouldresultinareoranelectricshock.
■G r o u nd t h e u ni t c o r r ec t l y .
Do n o t co n n e ct t h e g r o u n d w i r e t o a g a s p i p e , w a t e r p ip e , l i g h t n i n g r o d o r
telephoneground.Defectivegroundingcouldcauseelectricshock.
■ D o no t d a m a g e t h e w i r es .
Damagedwirescouldcausere.
■ B e s u r e t o s h u t o f f t h e m a i n p o w er w h en s et t i ng u p t h e i nd o o r P . C . b o a r d
o r w i r i ng .
Fa i l u r e t o d o so co u l d ca u se e l e ct r i c sh o ck.
■ Usethespeciedwirestosecurelyconnecttheindoorandoutdoorunits.
Attachthewiresrmlytoavoidapplyingstresstotheterminalblock.
Improperconnectioncouldcausere.
■ Donotinstalltheunitinaplacewhereammablegasmayleak.
If g a s l e a ks a n d a c cu m u l a t e s a r o u n d t h e u n it , i t co u ld ca u se a n e xp l o si o n .
■D o no t u s e i nt er m ed i a t e c o nnec t i o n o f t h e p o w er c o r d o r t h e ex t ens i o n
c o r d . D o no t c o nnec t m a ny d ev i c es t o o ne A C o u t l et .
Itcouldcauseareoranelectricshock.
■ Usethepartsprovidedorspeciedpartsfortheinstallationwork.
Theuseofdefectivepartscouldcauseaninjuryorleakageofwaterduetoa
re,anelectricshock,theunitfalling,etc.
■ W h en p l u g g i ng t h ep o w er s u p p l y p l u g i nt o t h e o u t l et , m a k es u r e t h a t t h er e
i s no d u s t , b l o c k a g e, o r l o o s e p a r t s b o t h i n t h e o u t l et a nd o n t h e p l u g .
V er i f y t h a t t h e p o w er s u p p l y p l u g i s c o m p l et el y i n t h e o u t l et .
If t h e r e i s d u st , b lo cka g e , o r l o o se p a r t s o n t h e p o w e r su p p l y p lu g o r t h e o u t le t ,
itcouldcauseelectricshockorre.Ifloosepartsarefoundonthepowersupply
p l u g , r e p la ce i t .
■ S ec u r el y a t t a c h t h e el ec t r i c a l c o v er t o t h e i nd o o r u ni t a nd t h e s er v i c e
p a nel t o t h e o u t d o o r u ni t .
Iftheelectricalcoveroftheindoorunitand/ortheservicepaneloftheoutdoor
u n i t a r e n o t a t t a ch e d se cu r e l y, d u st , w a t e r , e t c. co u l d co lle ct i n t h e u n it a n d
couldcauseareoranelectricshock.
■
W h en i ns t a l l i ng , r el o c a t i ng , o r s er v i c i ng t h e u ni t , m a k e s u r e t h a t no s u b s t a nc e
otherthanthespeciedrefrigerant(R410A)enterstherefrigerantcircuit.
A n y p r e se n ce o f f o r e i g n su b st a n ce su ch a s a i r ca n ca u se a b n o r m a l p r e ssu r e
r ise a n d m a y r e su l t in e xp l o si o n o r in ju r y. T h e u se o f a n y r e f r i g e r a n t o t h e r t h a n
thatspeciedforthesystemwillcausemechanicalfailure,systemmalfunction,
o r u n i t b r e a kd o w n . In t h e w o r st ca se , t h is co u l d l e a d t o a se r i o u s i m p e d im e n t
t o se cu r i n g p r o d u ct sa f e t y.
■ D o no t d i s c h a r g e t h e r ef r i g er a nt i nt o t h e a t m o s p h er e. C h ec k t h a t t h e
r ef r i g er a nt g a s d o es no t l ea k a f t er i ns t a l l a t i o n h a s b een c o m p l et ed . I f
r ef r i g er a nt l ea k s d u r i ng i ns t a l l a t i o n, v ent i l a t e t h e r o o m .
Ifrefrigerantcomesincontactwithare,harmfulgascouldbegenerated.
Ifrefrigerantgasleaksindoors,andcomesintocontactwiththeameofafan
heater,spaceheater,stove,etc.,harmfulgaseswillbegenerated.
■ U s e a p p r o p r i a t e t o o l s a nd p i p i ng m a t er i a l s f o r i ns t a l l a t i o n.
T h e p r e ssu r e o f R 4 1 0 A i s 1 . 6 t i m e s h i g h e r t h a n R 2 2 . N o t u si n g t h e a p p r o p r i -
a t e t o o l s a n d m a t e r i a l s, o r i m p r o p e r i n st a l l a t i o n co u l d ca u se t h e p i p e s t o b u r st
ca u si n g a n in ju r y.
■ W h en p u m p i ng d o w nt h e r ef r i g er a nt , s t o p t h e c o m p r es s o r b ef o r e d i s c o n-
nec t i ng t h e r ef r i g er a nt p i p es .
If t h e r e f r i g e r a n t p i p e s a r e d isco n n e ct e d w h i l e t h e co m p r e sso r i s r u n n i n g a n d
thestopvalveisopen,aircouldbedrawninandthepressureintherefrigera-
t i o n cycl e co u l d b e co m e a b n o r m a l l y h ig h , ca u si n g t h e p ip e s t o b u r st .
■ W h en i ns t a l l i ng t h e u ni t , s ec u r el y c o nnec t t h e r ef r i g er a nt p i p es b ef o r e
s t a r t i ng t h e c o m p r es s o r .
If t h e co m p r e sso r i s st a r t e d b e f o r e t h e r e f r ig e r a n t p ip e s a r e co n n e ct e d a n d t h e
stopvalveisopen,aircouldbedrawninandthepressureintherefrigeration
cycl e co u l d b e co m e a b n o r m a l l y h ig h , ca u si n g t h e p ip e s t o b u r st .
■ Fastenaarenutwithatorquewrenchasspeciedinthismanual.
Iffastenedtootight,aarenutcouldbreakandcauserefrigerantleakage.
■ I ns t a l l t h e u ni t a c c o r d i ng t o na t i o na l w i r i ng r eg u l a t i o ns .
■B e s u r e t o i ns t a l l a G r o u nd F a u l t I nt er r u p t ( G F I ) c i r c u i t b r ea k er .
Fa i l u r e t o i n st a l l a Gr o u n d Fa u l t In t e r r u p t (GFI) ci r cu i t b r e a ke r m a y r e su l t i n
electricshockorre.
■W h en o p eni ng o r c l o s i ng t h e v a l v e b el o w f r eezi ng t em p er a t u r es , r ef r i g -
er a nt m a y s p u r t o u t f r o m t h e g a p b et w een t h e v a l v e s t em a nd t h e v a l v e
b o d y , r es u l t i ng i n i nj u r i es .
■
P er f o r m t h e d r a i na g e/ p i p i ng w o r k s ec u r el y a c c o r d i ng t o t h e i ns t a l l a t i o n m a nu a l .
If t h e r e i s d e f e ct i n t h e d r a i n a g e / p i p i n g w o r k, w a t e r co u l d d r i p f r o m t h e u n it ,
a n d d a m a g e h o u se h o l d i t e m s.
■ Donottouchtheairinletorthealuminumnsoftheoutdoorunit.
T h i s co u l d ca u se i n j u r y.
■D o no t i ns t a l l t h e o u t d o o r u ni t w h er e s m a l l a ni m a l s m a y l i v e.
If s m a ll a n i m a l s e n t e r t h e u n i t a n d d a m a g e i t s e le ct r i ca l p a r t s, i t co u l d ca u se a
malfunction,smokeemission,orre.Keeptheareaaroundtheunitclean.
■W h en t h er e a r e t h e p o r t s w h i c h a r e no t u s ed , m a k e s u r e t h ei r nu t s a r e
t i g h t ened s ec u r el y .
■W h enc h a r g i ng t h e r ef r i g er a nt s y s t em w i t h a d d i t i o na l r ef r i g er a nt , b e s u r e
t o u s e l i q u i d r ef r i g er a nt .
A d d i n g g a s r e f r ig e r a n t m a y ch a n g e t h e co m p o si t i o n o f t h e r e f r i g e r a n t i n t h e
syst e m a n d a f f e ct n o r m a l o p e r a t i o n o f t h e a i r co n d i t i o n e r . A l so , ch a r g e t h e
l i q u i d r e f r i g e r a n t sl o w l y, o t h e r w i se t h e co m p r e sso r w i l l b e lo cke d . T o m a in t a i n
t h e h ig h p r e ssu r e o f t h e g a s cyl in d e r , w a r m t h e g a s cyl in d e r w i t h w a r m w a t e r
(under104°F(40°C))duringcoldseason.Butneverusenakedreorsteam.
CAUTION (Co u l d le a d t o se r io u s in ju r y w h e n o p e r a t e d i n co r r e ct l y . )
WARNING (Co u l d l e a d t o d e a t h o r se r i o u s i n j u r y , e t c. )
1 . B E F O R E I N S T A L L A T I O N
* 7 If p ip e le n g t h e xce e d s 1 3 1 . 2 f t . (4 0 m ), a d d i t i o n a l r e f r i g e r a n t (R 4 1 0 A ) ch a r g e
i s r e q u i r e d . (N o a d d it i o n a l ch a r g e i s r e q u ir e d f o r p i p e l e n g t h l e ss t h a n 1 3 1 . 2 f t .
(4 0 m ). )
A d d i t i o n a l r e f r ig e r a n t (f t . ) = A × (p i p e le n g t h (f t . ) - 1 3 1 . 2 )
5
A d d i t i o n a l r e f r ig e r a n t (m ) = A × (p i p e le n g t h (m ) - 4 0 )
*8The piping specication table does not provide a minimum line set length.
However,indoorunitswithconnectedpipinglengthlessthan10ft.(3m)could
produceintermittentnoiseduringnormalsystemoperationinveryquietenvi-
r o n m e n t s. P l e a se b e a w a r e o f t h i s i m p o r t a n t i n f o r m a t i o n w h e n i n st a l l i n g a n d
l o ca t i n g t h e i n d o o r u n i t w it h i n t h e co n d i t i o n e d sp a ce .
VG79N191H01_01En.indd 1 2022/06/28 11:39:39