Mitsubishi Electric MXZ-2C20NA4 Installation Manual page 6

3 . F L A R I N G
3 - 1 . P R E C A U T I O N S F O R D E V I C E S T H A T U S E R 4 1 0 A R E F R I G E R A N T
• U se C1220 copper phosphorus, for copper and copper alloy seamless pipes, to connect the refrigerant pipes. Use refrigerant pipes with the thicknesses specified
i n t h e t a b l e t o t h e b e l o w . M a k e
o r d u s t .
A l w a y s a p p l y n o - o x i d a t i o n b r a z i n g w h e n b r a z i n g t h e p i p e s ,
When installing, relocating, or servicing the unit, make sure that no substance other than the specified refrigerant (R410A) enters the refrigerant circuit.
A ny p r es enc e o f f o r ei g n s u b s t a nc e s u c h a s a i r c a n c a u s e a b no r m a l p r es s u r e r i s e a nd m a y r es u l t i n ex p l o s i o n o r i nj u r y . T h e u s e o f a ny r ef r i g er a nt o t h er
than that specified for the system will cause mechanical failure, system malfunction, or unit breakdown. In the worst case, this could lead to a serious
i m p ed i m ent t o s ec u r i ng p r o d u c t s a f et y .
P i p e s i z e (m m ) ø 6 . 3 5
T h i c k n e s s (m m ) 0 . 8
• D o not use pipes thinner than those specified above.
• U s e 1 / 2 H o r H p i p e s i f t h e d i a m e t e r i s 1 9 . 0 5 m m
• B e sure to have appropriate ventilation in order to prevent ignition. Furthermore, be sure to carry out fire prevention measures that there are no dangerous or flam-
m a b l e o b j e c t s i n t h e s u
3 - 2 . F L A R I N G W O R K
en
1 ) Cu t t h e c o p p e r p i p e c o
2) Completely remove all burrs from the cut cross section of
p i p e . (Fi g . 3 )
• Aim the copper pipe downward while removing burrs to
prevent burrs from dropping in the pipe.
3) Remove flare nuts attached to indoor and outdoor units,
then put them on pipe having completed burr removal.
(Not possible to put them on after flaring work.)
4 ) Fl a r i n g w o r k (Fi g . 4 , 5 ). Fi r m l y h o l d c o
d i m e n s i o n s h o w n i n t h e t a b l e . S e l e c t
t h e t a b l e a c c o r d i n g t o t h e t o o l s e
5 ) Ch e c k
• Compare the flared work with Fig. 6.
• If flare is noted to be defective, cut off the flared section
and do flaring work again.
P i p e d i a m e t e r B
[ i n c h (m m )] [ i n c h (m m )]
1 / 4 (ø 6 . 3 5 ) 2 1 / 3 2 (1 7 )
3 / 8 (ø 9 . 5 2 ) 7 / 8 (2 2 )
1 / 2 (ø 1 2 . 7 ) 1 - 1 / 3 2 (2 6 )
5 / 8 (ø 1 5 . 8 8 ) 1 - 5 / 3 2 (2 9 )
3 - 3 . P I P E C O N N E C T I O N
• T h e c o n n e c t e d p i p e s i z e
In d o o r u n i t c a p a c i t y
In d o o r u n i t : M s e r i e s
In d o o r u n i t : S s e r i e s
In d o o r u n i t : P s e r i e s * 1
* 1 R e f e r t o t h e i n s t a l l a t i o n m a n u a l o f P s e
• Use tightening torque table above as a guideline for indoor unit side union
joint section, and tighten using two wrenches. Excessive tightening damages
the flare section.
1) Do not apply refrigeration oil on screw threads. Excessive tightening torque
w i l l r e s u l t i n d a m a g e o n t h e s c r
2) For connection, first align the center, then tighten the first 3 to 4 turns of flare
n u t b y h a n d .
3) Tighten the flare nut with a torque wrench as specified in the table.
• Over-tightening may cause damage to the flare nut, resulting in refrigerant
l e a k a g e .
• B e s u r e t o w r a p i n s u
p i p i n g m a y r e s u l t i n b u r n s o r f r o s t b i t e .
3 - 4 . I N S U L A T I O N A N D T A P I N G
1) Cover piping joints with pipe cover.
2) For outdoor unit side, surely insulate every piping including valves.
3 ) U s i n g p i p i n g t a p e (E), a p p l y t a p i n g s t a r t i n g f r o m
• Stop the end of piping tape (E) with tape (with adhesive agent attached).
• When piping have to be arranged through above ceiling, closet or where
t h e t e m p e r a t u r e a n d h u m i d i t y a r e h i g h , w i n d a d d i t i o n a l c o
insulation to prevent condensation.
5
W O R K A N D P I P E C O N N E C T I O N
s u r e t h e i n s i d e s o f t h e p i p e s a r e c l e a n a n d d o n o t c o n t a i n a n y h a r m f u l c o
ø 9 . 5 2 ø 1 2 . 7 ø 1 5 . 8 8 ø 1 9 . 0 5 ø 2 2 . 2
0 . 8 0 . 8 1 . 0 1 . 0 1 . 0
o r l a r g e r .
r r o u n d i n g a r e a .
r r e c t l y w i t h p i p e c u t t e r . (Fi g . 1 , 2 )
p p e r p i p e i n t h e
A i n c h (m m ) f r o m
l e c t e d .
Cl u t c h t y p e t o o l f o r R 4 1 0 A Cl u t c h
0 t o 0 . 0 2
(0 t o 0 . 5 )
d i f f e r s d e p e n d i n g t h e m o d e l s a n d t h e c a
0 6 ~ 0 9
L i q u i d p i p e s i z e ø 6 . 3 5 ø 6 . 3 5
Ga s p i p e s i z e ø 9 . 5 2 ø 9 . 5 2
L i q u i d p i p e s i z e ø 6 . 3 5 ø 6 . 3 5
Ga s p i p e s i z e ø 9 . 5 2 ø 9 . 5 2
L i q u i d p i p e s i z e ø 6 . 3 5 ø 6 . 3 5
Ga s p i p e s i z e ø 9 . 5 2 ø 1 2 . 7
r i e s f o r d e t a i l s o f M V Z - A a n d S V Z - K P .
e w .
l a t i o n a r o u n d t h e p i p i n g . Di r e c t c o n t a c t
t h e e n t r y o f o u t d o o r u n i t .
o t h e r w i s e , t h e c o m p r e s s o r w i l l b e d a m a g e d .
WARNING
ø 2 5 . 4 ø 2 8 . 5 8
1 . 0 1 . 0
Co p p e r
p i p e
Fi g . 1
Fl a r i n g t o o l
Di e
Cl u t c h t y p e W i n g n u t t y p e
Fi g . 4
A [ i n c h (m m )]
t y p e t o o l f o r R 2 2 W i n g n u t t y p
0 . 0 6 t o 0 . 0 8
(1 . 5 t o 2 . 0 )
0 . 0 4 t o 0 . 0 6
(1 . 0 t o 1 . 5 )
0 . 0 8 t o 1 . 0
(2 . 0 t o 2 . 5 )
p a c i t i e s o f i n d o o r u n i t s .
1 2 1 5
ø 6 . 3 5
ø 1 2 . 7
ø 6 . 3 5
ø 1 2 . 7
ø 6 . 3 5
ø 1 2 . 7
I nd o o r u ni t c o nnec t i o n
w i t h t h e b a r e
In t e r n a l t h r e a d s i d e
Tighten the flare nut
w i t h a t o r q u e w r e n c h
O u t d o o r u ni t c o nnec t i o n
m m e r c i a l l y s o l d
n t a m i n a n t s s u c h a s s u l f u r i c c o
N o g o o d
Go o d
B u r r
Tilted Uneven Burred
Fi g . 2
S m o o t h a l l
a r o u n d
Co p p e r p i p e
Fl a r e n u t
B
Fi g . 5
T i g h t e n i n g t o r q u e
e t o o l f o r R 2 2 f t - Ib
1 0 t o 1 3 1 3 . 7 t o 1 7 . 7
2 5 t o 3 0 3 4 . 4 t o 4 1 . 2
3 6 t o 4 2 4 9 . 1 t o 5 6 . 9
5 4 t o 5 8 7 3 . 5 t o 7 8 . 5
WARNING
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 .
CAUTION
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
n o t u s e d , m a k e s u r e t h e i r n u t s a r e
t i g h t ened s ec u r el y .
Fl a r e n u t U n i o n j o i n t
.
Tighten the flare nut
w i t h a t o r q u e w r e n c h
m p o u n d s , o x i d a n t s , d e b r i s ,
Co p p e r p i p e
S p a r e r e a m e r
P i p e c u t t e r
Fi g . 3
In s i d e i s s h i n -
i n g w i t h o u t a n y
s c r a t c h e s .
Even length
a l l a r o u n d
Fi g . 6
N • m k g f • c m
1 4 0 t o 1 8 0
3 5 0 t o 4 2 0
5 0 0 t o 5 8 0
7 5 0 t o 8 0 0
Ex t e r n a l t h r e a d s i d e
Gr i p t h e n u t o n t h e
u n i o n j o i n t w i t h a s p a n n e r .
.