– 95 –
Heat insulating process
•
A
fter dra
in
c
h
eck, coverin
g
the h
eat insulato
r fo
r drain con
necting section
, wr
ap th
e dr
ain pipe with he
at insulator
(Loca
lly procured) wit
hout
c
lea
ran
ce from t
he en
d of
the drain p
ip
e conn
ecting po
rt
of the
hot wate
r m
odu
le
.
Check the follow
ing contents
To c
o
v
e
r th
e pi
p
e
an
d t
h
e
h
o
t wa
te
r mo
du
le
w
ith
a he
at
i
n
su
lat
or
, d
o not
mak
e a
s
pa
c
e
bet
w
een
th
em.
H
e
a
t insu
la
to
r
PVC p
ipe
Fi
x
t
he i
ns
ul
a
tor w
it
h adh
es
iv
e ta
pe
He
at ins
ula
to
r
(l
oc
al
ly
pr
oc
ur
ed)
(lo
ca
lly pr
oc
ur
ed
)
(l
oc
a
lly
pr
oc
ur
ed
)
Un
it
Wa
te
r ou
tl
e
t
W
a
te
r in
let
Dr
ain
T
o
av
oid
wat
er
le
a
k
, wr
ap
s
o
m
e
se
al
in
g ta
pe
a
ro
und
th
e scr
ew
p
a
rt.
8
Refrigerant piping
CAU
TI
ON
When the refrigerant pipe is long,
provide support brackets at
intervals of 2.5 m to
3 m to clamp
the refrigerant pipe. Otherwise,
abnor
mal sound may be
gener
ate
d.
Use the flare nut attached with
the indoor unit or R4
10A flare nut.
Per
m
is
si
bl
e p
ipi
ng
le
ngth
an
d
height difference
The
y
vary d
epen
ding on
the o
u
tdo
o
r
unit. For deta
ils,
refe
r to
the
In
stallation Manu
al
att
a
ched to the outdo
or
u
n
it, an
d this ma
nual (Re
fer to "3
.
System
c
o
ntrol of
Hot Water
M
odule").
Pipe size
Connecting refrigerant piping
Fl
arin
g
1
Cut the pipe with a
pipe
cutter.
Rem
o
ve burrs
com
p
letely. (Rem
ainin
g burrs may
cause ga
s le
akage.
)
2
Insert a
flare
nut into
the
p
ipe, and flare the
pipe.
Use the
flare nut provided
with the unit or
th
e one
used fo
r t
he R410A
re
frige
ran
t. The flaring
dimen
s
ion
s for R410A
are
different
fro
m th
e on
es
used fo
r t
he con
v
e
n
tional R22
refr
iger
ant
. A new
flare
tool m
anuf
actur
ed fo
r u
s
e
with
the R410
A
re
frigeran
t
is re
c
o
mmende
d, but the
con
v
e
ntional
tool can still be u
s
e
d if
t
he pr
ojection ma
rg
in
o
f the
copper pipe
is
adjusted
to be
as shown in th
e
follo
wing
table.
Proj
ection m
a
rg
in
in
flari
ng:
B (Uni
t:
mm)
Flarin
g d
iameter s
ize: A
(Unit:
mm)
*
In case
of flarin
g for R410A
with
the con
v
e
n
tiona
l
flare
tool, p
u
ll it o
u
t ap
pro
x. 0.5
mm
more th
an th
at
for R2
2 to a
d
just to
the spe
c
ified
flare
size.
T
h
e
coppe
r p
ipe
gau
ge is usefu
l f
o
r
adjusting p
rojection
margin size.
•
T
h
e
sealed
gas was sealed
at th
e atmosphe
ric
pressure
so when t
he flare n
u
t is re
move
d, the
re
will
no “whooshing
” sou
nd: This is norma
l a
nd is no
t
in
dicative of trou
ble.
•
U
se
two
wrenche
s to conn
ect the
indoor un
it
pipe.
Model MM
W
-
Pi
pe size
(m
m)
Gas
side
L
iquid
side
AP027 to
AP056
Ø15
.9
Ø
9.5
Out
e
r d
ia.
of
copper pipe
R410A t
ool
used
Conventi
onal
tool used
6.4, 9.5
0 to
0.5
1.0 t
o
1.5
12.7, 15.9
Outer
di
a. of c
opper
pi
pe
A
+0
–0.4
6.4
9.1
9.5
13
.2
1
2
.7
16
.6
1
5
.9
19
.7
W
o
rk
us
ing do
ub
le sp
an
ner
