Mitsubishi Electric MXZ-2C20NA4 Manual De Instalación página 7

4 . P U R G I N G P R O C E D U R E S , L E A K T E S T , A N D T E S T R U N
4 - 1 . P U R G I N G P R O C E D U R E S A N D L E A K T E S T
1) Remove service port cap of stop valve on the side of the outdoor unit gas pipe.
(The stop valves are fully closed and covered in caps in their initial state.)
2) Connect gauge manifold valve and vacuum pump to service port of stop valve
o n t h e s i d e o f t h e o u t d o o r u n i t g a s p i p e .
3) Run the vacuum pump. (Vacuumize for more than 15 minutes.)
4) Check the vacuum with gauge manifold valve, then close gauge manifold
valve, and stop the vacuum pump.
5) Leave as it is for one or two minutes. Make sure the pointer of gauge manifold
valve remains in the same position. Confirm that pressure gauge shows -14.7
p s i [ Ga u g e ] (- 0 . 1 0 1 M P a ).
6) Remove gauge manifold valve quickly from service port of stop valve.
7) After refrigerant pipes are connected and evacuated, fully open the valve stem
of all stop valves on both sides of gas pipe and liquid pipe by the hexagonal
wrench. If the valve stem hits the stopper, do not turn it any further. Operating
w i t h o u t f u l l y o p e n i n g l o w e r s t h e p e r f o r m a n c e
8 ) R e f e r t o 1 - 2 . , a n d c h a r g e t h e p r e s c r
s u r e t o c h a r g e s l o w l y w i t h l i q u i d r e f r i g e r a n t . O t h e r w i s e
r e f r i g e r a n t i n t h e s y s t e m m a y b e c h
c o n d i t i o n e r .
9) Tighten cap of service port to obtain the initial status.
1 0 ) L e a k t e s t
WARNING
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 eez i 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 .
4 - 2 . G A S C H A R G E
P e r f o r m g a s c h a r g e t o u n i t .
1) Connect gas cylinder to the service port of stop valve.
2 ) P e r f o r m a i r p u r g e o f t h e p i p e (o r h o s e
3) Replenish specified amount of the refrigerant, while operating the air conditioner for cooling.
N o t e:
In case of adding refrigerant, comply with the quantity specified for the refrigerating cycle.
W h en c h a r g i n g t h e r e f r i g e r a n t s y s t e m
r ef r i g er a nt . A d d i ng g a s r ef r i g er a nt m a y c h a ng e t h e c o m p o s i t i o n o f t h e r ef r i g er a nt i n
t h e s y s t em a nd a f f ec t no r m a l o p er a t i o n o f t h e a i r c o nd i t i o ner . A l s o , c h a r g e t h e l i q u i d
r ef r i g er a nt s l o w l y , o t h er w i s e t h e c o m p r es s o r w i l l b e l o c k ed .
T o m a i nt a i n t h e h i g h p r es s u r e o f t h e g a s c y l i nd er , w a r m
water (under 104°F (40°C)) during cold season. But never use naked fire or steam.
4 - 3 . R E M O V I N G T H E M A I N T E N A N C E P A N E L
T h e s e t t i n g o f Di p S w i t c h o n t h e o u t d o o r c o
without removing the front panel.
Follow the procedures below to remove the maintenance panel and set
t h e Di p S w i t c h .
1) Remove screw(s) which fix the maintenance panel.
2) Remove the maintenance panel, and perform necessary settings.
3 ) In s t a l l t h e m a i n t e n a n c e p a n e l .
N o t e:
Make sure to fix the maintenance panel securely. Incomplete installation
c o u l d c a u s e m a l f u n c t i o n .
a n d t h i s c a u s e s t r o u b l e .
i b e d a m o u n t o f r e f r i g e r a n t i f n e e d e d . B e
, c o m p o s i t i o n o f t h e
a n g e d a n d a f f e c t p e r f o r m a n c e o f t h e a i r
Valve body
Ca p
Valve stem
) c o m i n g f r o m r e f r i g e r a n t g a s c y l i n d e r .
CAUTION
w i t h a d d i t i o n a l r e f r i g e r a n t , b e s u r e t o u s e l i q u i d
t h e g a s c y l i nd er w i t h w a r m
n t r o l l e r b o a r d c a n b e c h a n g e d
Valve stem
Stop valve cap
(T o r q u e 1 9 . 6 t o
Cl o s e
2 9 . 4 N • m , 2 0 0
O p e n
t o 3 0 0 k g
He x a g o n a l
w r e n c h
Service port cap
(T o r q u e 1 3 . 7 t o
1 7 . 7 N • m , 1 4 0 t o
1 8 0 k g f • c m )
Stop valve
f o r GA S
P r e c a u t i o n s w h e n u s -
ing the control valve
B o d y
Cl o s e
A
O p e n
Co n t r o l
Service port
valve
Ch a r g e h o s e
(f o r R 4 1 0 A )
U n i o n
U n i o n
U n i o n
U n i o n
R e f r i g e r a n t g a s
c y l i n d e r
operating valve
(f o r R 4 1 0 A )
M a i n t e n a n c e
Co m p o u n d p r e s s u
– 0 . 1 0 1 M P a
g a u g e (f o r R 4 1 0 A )
(– 7 6 0 m m Hg )
P r e s s u r e g a u g e
(f o r R 4 1 0 A )
f • c m )
Ga u g e m a n i f o l d
valve (for R410A)
Ha n d l e Hi g h
Ha n d l e
L o w
Ch a r g e h o s e
(f o r R 4 1 0 A )
Stop valve
V a c u u m p u m p
f o r L IQ U ID
(f o r R 4 1 0 A )
When attaching the control valve
to the service port, valve core may
d e f o r m o r l o o s e n i f e x c e s s p r e s -
s u r e i s a p p l i e d . T h i s m a y c a u s e
g a s l e a k .
When attaching the control valve to
the service port, make sure that the
valve core is in closed position, and
t h e n t i g h t e n p a r t A . Do n o t t i g h t e n
part A or turn the body when valve
c o r e i s i n o p e n p o s i t i o n .
Stop valve
L i q u i d
p i p e
In d o o r O u t d o o r
u n i t u n i t
Stop valve with
Ga s
service port
p i p e
Ga u g e m a n i f o l d
valve (for R410A)
Ch a r g e h o s e
(f o r R 4 1 0 A )
R e f r i g e r a n t g a s c y l i n d e r f o r R 4 1 0 A w i t h s i p h o n
R e f r i g e r a n t (l i q u i d )
El e c t r o n i c s c a l e f o r r e f r i g e r a n t c h a r g i n g
p a n e l
r e
en
6