Panasonic U-5MX3XPQ, Installation Manual

Page: 12 / 24

Installation manual
8
U-5~48MX3
Urban Multi air conditioner
4PW16235-1C
Pipe siz
e selection
F
or an outdoor unit m
ulti installation (U-18~48MX3), mak
e the
settings in accordance with the f
ollo
wing figure
.
A.
Piping between outdoor unit and refrigerant branc
h kit
•
Match to the siz
e of the connection piping on the outdoor unit.
Outdoor unit connection piping siz
e
Piping between refrig
erant branc
h kits
•
Choose from the f
ollo
wing tab
le in accordance with the total capacity of
all the indoor units connected below this
.
•
Do not let the connection piping e
xceed the refr
iger
ant piping siz
e
chosen b
y
gener
al system model name
.
B.
Piping between outdoor branc
hes
•
Choose from the f
ollo
wing tab
le in accordance with the total capacity of
all the oudoor units connected abov
e
this
.
Piping between refrig
erant branc
h kit and indoor unit
•
Pipe siz
e f
or direct connection to indoor unit must be the same as the
connection siz
e of indoor unit.
C.
Piping between outdoor branc
h and outdoor unit
D.
Oil-equalizing line (Onl
y f
or U-18MX3 or greater)
Ho
w to calculate the ad
ditional refrig
erant to be c
har
g
e
d
Additional refr
iger
ant to be charged R (kg)
R should be rounded off in units of 0.1 kg
Example f
or refrig
erant branc
h using line branc
h pipe and header branc
h pipe f
or U-34MX3
If the outdoor unit is U-34MX3 and the piping lengths are as belo
w
R = [30x0.25]+[10x0.17]+[10x0.11]+[40x0.054]+[49x0.022]–6 = 7.538
⇒
R = 7.5 kg
A
B
C
D
Outdoor unit capacity type
Piping siz
e (outer diameter)
Gas pipe
Liquid pipe
U-5MX3
Ø15.9
Ø9.5
U-8MX3
Ø19.1
U-10MX3
Ø22.2
U-12~16MX3
Ø28.6
Ø12.7
U-18~22MX3
Ø15.9
U-24MX3
Ø34.9
U-26~34MX3
Ø19.1
U-36~48MX3
Ø41.3
Indoor capacity inde
x
Piping siz
e (outer diameter)
Gas pipe
Liquid pipe
<200
Ø15.9
Ø9.5
200
≤
x<290
Ø22.2
290
≤
x<420
Ø28.6
Ø12.7
420
≤
x<640
Ø15.9
640
≤
x<920
Ø34.9
Ø19.1
>920
Ø41.3
Outdoor capacity inde
x
Piping siz
e (outer diameter)
Gas pipe
Liquid pipe
<22 HP
Ø28.6
Ø15.9
24 HP
Ø34.9
>26 HP
Ø19.1
Indoor capacity type
Piping siz
e (outer diameter)
Gas pipe
Liquid pipe
20~50
Ø12.7
Ø6.4
63~125
Ø15.9
Ø9.5
200
Ø19.1
250
Ø22.2
Outdoor capacity type
Piping siz
e (outer diameter)
Gas pipe
Liquid pipe
U-8MX3
Ø19.1
Ø9.5
U-10MX3
Ø22.2
U-12~16MX3
Ø28.6
Ø12.7
Piping siz
e
Ø6.4
NOTE
If a negativ
e result is gotten f
or R from
the f
o
rm
ula at r
ight, no refr
iger
ant
needs to be added nor remo
v
ed.
R=
(
T
otal length (m) of liquid
piping siz
e at Ø22.2
)
x0.35+
(
T
otal length (m) of liquid
piping siz
e at Ø19.1
)
x0.25+
(
T
otal length (m) of liquid
piping siz
e at Ø15.9
)
x0.17+
(
T
otal length (m) of liquid
piping siz
e at Ø12.7
)
x0.11
+
(
T
otal length (m) of liquid
piping siz
e at Ø9.5
)
x0.054+
(
T
otal length (m) of liquid
piping siz
e at Ø6.4
)
x0.022–
Model
Amount of refrig
erant
U-5~16MX3
0 kg
U-18~32MX3
3
kg
U-34~48MX3
6
kg
a:
Ø19.1x30 m
d
: Ø9.5x10 m
g
: Ø6.4x10 m
j: Ø6.4x10 m
b:
Ø15.9x10 m
e
: Ø9.5x10 m
h
: Ø6.4x20 m
k
: Ø6.4x9 m
c:
Ø9.5x10 m
f:
Ø9.5x10 m
i: Ø12.7x10 m