15
INSTAL
L
A
T
IO
N
OF
R
EF
R
IGER
ANT
PIPING
Step 6
Pip
ing
C
o
nne
ctions to
Outd
o
o
r Unit
1.
R
emov
e
serv
ice
v
alv
e
cov
er
(if
prov
ided)
to
access
the
serv
ice
v
alv
es
and
refrigerant
ports
.
2.
Carefully
bend
and
adjust
length
of
refrigerant
pipes
to
meet
outdoor
unit
serv
ice
v
alv
es
connections
w
ith
proper
tools
to
av
oid
kinks
.
N
O
T
E
:
U
se
proper
techniques
to
cut
and
re-flare
refrigerant
pipes
,
if
required.
An
R
410A
F
laring Tool
is
required
for
re-flaring
refrigerant
pipes
.
3. Apply
a
small
amount
of
refrigerant
oil
to
the
flare
connection
on
the
refrigerant
pipe
.
4. Properly
align
piping
and
tighten
flare
nut
using
a
standard
w
rench
and
a
torque
w
rench
as
show
n
in
the
indoor
piping
section.
5.
Carefully tighten flare nuts to corre
ct torque level referring to the following Torque Table:
NOTE: Over tightening may damage flare connections and cause leaks.
Pipe Diameter Nut Size
Tightening Torque
inch (mm) inch (mm) ft-lbs N-m
1/4 (6.35) 1/4 (17) 10 to 13 14 to 18
3/8 (9.5) 3/8 (22) 25 to 30 34 to 42
1/2 (12.7) 1/2 (25) 36 to 45 49 to 61
5/8 (15.9) 5/8 (29) 50 to 60 68 to 82
Torque Table
Service
Valve Cover
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