– 33 –
6-6-5. Final Installation Checks
Are there scr
a
tches or dents on the existing pipes?
NO
YE
S
Test run
Cle
a
n the pipes or use new pipes.
Existing pipes: C
a
nnot be used.
• Use new pipes.
YE
S
Is it possible to oper
a
te the existing
a
ir conditioner?
YE
S
NO
• After the existing
a
ir conditioner is oper
a
ted in cooling
mode for
a
pprox.
3
0 minutes or longer,* recover the
refriger
a
nt
• For cle
a
ning the pipes
a
nd recovering oil
• Refriger
a
nt recovery: Pump down method
Connect the indoor/outdoor units to the existing pipe.
• Use
a
fl
a
re nut
a
tt
a
ched indoor/outdoor units. (Do not
existing pipe.)
• Re-m
a
chine the fl
a
re m
a
chining size to size for R
3
2.
• (Airtight test), V
a
cuum dry, Refriger
a
nt ch
a
rge, G
a
s le
a
k
check
W
a
s l
a
rgely discolored oil or
a
l
a
rge qu
a
ntity of rem
a
ins
disch
a
rged? (When the oil deterior
a
tes, the color of the oil
ch
a
nges to
a
muddy or bl
a
ck color.)
NO
