Table of Contents
Advertisement
3
SAFETY PRECAUTION
3-1. ALWAYS OBSERVE FOR SAFETY
Before obtaining access to terminal, all supply
circuits must d isconnected .
3-2. CAUTIONS RELATED TO NEW REFRIGERANT
Cautions for units utiliz i ng refrigerant R410A
Use new refrigerant pipes.
I n c a
s e
o f u s i n g t h e e x i s t i n g p i p e s f o r R 22, b e c a
t h e f o l l o w i n g s .
· B e s u
r e t o c l e a n t h e p i p e s a n d m a k e
o f t h e p i p e s a r e c l e a n .
· C h a n g e f l a r e n u t t o t h e o n e p r o v i d e d w i t h t h i s p r o d u c t .
U s e
a n e w l y f l a r e d p i p e .
· A v o
i d u s i n g t h i n p i p e s .
Make sure th at th e inside and outside of refrige-
rant piping is clean and it h as no contamination
such as sulfur h az a rdous for use, ox ides, dirt,
sh av ing particles, etc.
In addition, use pipes with specified th ickness.
C o n t a m i n a t i o n i n s i d e r e f r i g e r a n t p i p i n g c a
r a t i o n o f r e f r i g e r a n t o i l e t c .
Store th e piping to be used indoors during
installation and both ends of th e piping sealed
until j ust before braz i ng. (Leav e elbow j oints, etc.
in th eir packaging.)
I f d i r t , d u s t
o r m o i s t u r e e n t e r i n t o r e f r i g e r a n t c y c l
c a
u s e
d e t e r i o r a t i o n o f r e f r i g e r a n t o i l o r m a l f u n c t i o n o f c o
p r e s s o
r .
Th e refrigerant oil applied to flare and flange
connections must be ester oil, eth er oil or
alkylbenz e ne oil in a small amount.
I f l a r g e a m o u n t o f m i n e r a l o i l e n t e r , t h a t c a
r a t i o n o f r e f r i g e r a n t o i l e t c .
Ch arge refrigerant from liq uid ph ase of gas
cylinder.
I f t h e r e f r i g e r a n t i s c h
a r g e d f r o m
c h
a n g e m a y o c c u r i n r e f r i g e r a n t a n d t h e e f f i c i e n c y
l o w e r e d .
Do not use refrigerant oth er th an R410A.
I f o t h e r r e f r i g e r a n t (R 22 e t c . ) i s u s e
r a n t c a
n c a
u s e
d e t e r i o r a t i o n o f r e f r i g e r a n t o i l e t c .
OC37 9 J
r e f u l w i t h
s u
r e t h a t t h e i n s i d e s
n c a
u s e
d e t e r i o -
e , t h a t c a
n
m -
n c a
u s e
d e t e r i o -
g a s p h a s e
, c o
m p o s i t i o n
w i l l b e
d , c h
l o r i n e i n r e f r i g e -
5
Use a v acuum pump with a rev erse flow ch eck
v alv e.
V a c u
u m
p u m p o i l m a y f l o w b a c k
t h a t c a
n c a
u s e
d e t e r i o r a t i o n o f r e f r i g e r a n t o i l e t c .
Use th e following tools specifically designed for
use with R410A refrigerant.
Th e f o l l o w i n g t o o l s a r e n e c e s s a r y t o u s e R 410A r e f r i g e r a n t .
To o l s f o r R 410A
G a u g e m a n i f o l d
C h a r g e h o s e
G a s l e a k d e t e c t o r
To r q u e w r e n c h
Handle tools with care.
I f d i r t , d u s t
o r m o i s t u r e e n t e r i n t o r e f r i g e r a n t c y c l
c a
u s e
d e t e r i o r a t i o n o f r e f r i g e r a n t o i l o r m a l f u n c t i o n o f c o
p r e s s o
r .
Do not use a ch arging cylinder.
I f a c h
a r g i n g c y l
i n d e r i s u s e
n t w i l l c h
a n g e a n d t h e e f f i c i e n c y
Use th e specified refrigerant only.
Nev er use any refrigerant oth er th an th at specified.
D o i n g s o
m a y c a
u s e
a b u r s t , a n e x p
u n i t i s b e i n g u s e
d , s e
r v i c e
d , o r d i s p
C o r r e c t
r e f r i g e r a n t i s s p
e c i f i e d i n t h e m a n u a l s a n d o n t h e
s p
e c l a b e l s p r o v i d e d w i t h o u r p r o d u c t s .
W e w i l l n o t b e h e l d r e s p
o n s i b l e f o r m e c h
s y s t
e m
m a l f u n c t i o n , u n i t b r e a k d
b y f a i l u r e t o f o l l o w t h e i n s t r u c t i o n s .
Ventilate th e room if refrigerant leaks during
operation. If refrigerant comes into contact with
a flame, poisonous gases will be released.
i n t o r e f r i g e r a n t c y c l
e a n d
F l a r e t o o l
S i z e
a d j u s t m e n t g a u g e
V a c u
u m
p u m p a d a p t o r
E l e c t r o n i c r e f r i g e r a n t
c h
a r g i n g s c a
l e
e , t h a t c a
d , t h e c o
m p o s i t i o n o f r e f r i g e r a -
w i l l b e l o w e r e d .
l o s i o n , o r f i r e w h e n t h e
o s e
d o f .
a n i c a
l f a i l u r e ,
o w n o r a c c i
d e n t s c a
u s e
n
m -
d
Advertisement
Table of Contents
