9
English
Pipe Siz
es Selection
Piping between Outdoor Unit ~ Refrig
erant Branc
h Connection (P
ar
t A)
Calculation Method of Re-c
har
ging Amount of
Refrig
erant
Re-charging Amount R (kg)
( • Round off at 2 places of decimals f
or R.)
NO
TE:
THE ADDITIONAL REFRIGERANT CHARGING AMOUNT BEFORE
TEST
R
UN IS ONL
Y CORRECTION
V
ALUE BY OUTDOOR UNIT CAP
A
CITY
.
(unit:mm)
R=
+
+
+
+
+
R= 45 0.18 + 23 0.12 + 195 0.059 + 40 0.022 + 2.8 =26.045
i+r
a+b
c+d+e+f+g+h+s
26.0 kg
×0.37
+
Example f
or refrig
erant branc
hes using REFNET joints and REFNET header
s
j+k
Q22 type
< f
or individual systems >
< f
or m
ulti-connecting systems >
Indoor unit
Indoor unit
Outdoor unit
Outdoor unit
Pa
rt
D
Pa
rt
D
P
a
rt
E
P
ar
t A
P
ar
t B
P
ar
t C
Pa
rt
E
Pa
rt
A
•
Select from belo
w char
t according to system name of the outdoor unit.
•
W
hen equiv
alent piping length betw
een outdoor unit ~ indoor unit is 90m or
longer
, siz
es of main pipes on the gas and liquid sides (P
ar
t A) m
ust be
enlarged.
Piping between Refrig
erant Branc
h Connection ~ Indoor Unit (P
ar
t E)
•
Match to the siz
e of the connection piping on the indoor unit.
*1 Existing pipes m
ust meet the condition of design pressure 3.3MP
a.
Specificly
, to confir
m that the (pipe) thic
kness m
ust not be less than the
required minim
um thic
kness instr
ucted in the installation man
ual (1).
*2 Existing pipes m
ust be connected at P
a
rt
A.
Piping between Outdoor unit m
ulti Connection Piping kit (P
ar
t B)
•
Select from belo
w char
t according to individual capacity type of constr
ucting
outdoor unit.
Piping between Outdoor unit m
ulti Connection Piping Kit ~ Outdoor Unit (P
ar
t C)
•
Select from belo
w char
t according to individual capacity type of constr
ucting
outdoor unit.
Q8 type
Q10 type
Q12 type
Q14 type
Q16 type
Q18~22 type
Q24 type
Q26~34 type
Q36~48 type
φ
19.1
φ
22.2
φ
28.6
φ
34.9
φ
41.3
φ
28.6
φ
34.9
φ
41.3
φ
54.1
φ
9.5
φ
12.7
φ
15.9
φ
19.1
φ
15.9
φ
19.1
φ
22.2
System name of
outdoor unit
gas pipe
liquid pipe
standar
d siz
e
max.
siz
e
standar
d siz
e
max.
siz
e
[gas side]
Q8 type :
φ
19.1
→
φ
22.2
Q10 type :
φ
22.2
→
φ
25.4*
Q12, 14 type :
Not lncreased
Q16~22 type :
φ
28.6
→
φ
31.8
Q24 type :
Not lncreased
Q26~34 type :
φ
34.9
→
φ
38.1
Q36~48 type :
Not lncreased
[liquid side]
Q8, 10 type :
φ
9.5
→
φ
12.7
Q12~16 type :
φ
12.7
→
φ
15.9
Q18~24 type :
φ
15.9
→
φ
19.1
Q26~48 type :
φ
19.1
→
φ
22.2
*
If a
v
ailab
le on the site
, use this siz
e
.
Otherwise it can not be increased.
Piping between Refrig
erant Branc
h kits (P
ar
t D)
•
Select from belo
w char
t according to total capacity of indoor units connected
do
wn-stream.
(Note)
Siz
es of connection pipings m
ust not e
xceed main pipe siz
es (P
ar
t A).
(unit:mm)
< 150
150
≤
x < 200
200
≤
x < 290
290
≤
x < 420
420
≤
x < 640
640
≤
x < 920
920
≤
x
φ
15.9
φ
19.1
φ
22.2
φ
28.6*
φ
34.9
φ
41.3
φ
19.1
φ
25.4
φ
28.6
φ
34.9
φ
54.1
φ
9.5
φ
12.7
φ
15.9
φ
19.1
φ
12.7
φ
15.9
φ
19.1
φ
22.2
T
otal capacity of
indoor units
gas pipe
liquid pipe
standar
d siz
e
max.
siz
e
standar
d siz
e
max.
siz
e
(unit:mm)
P20 · 25 · 32 · 40 · 50 type
P63 type *
φ
12.7 appliab
le
P80 type
P100 · 125 · 140 type
P200 type
P250 type
φ
12.7
φ
15.9*
φ
15.9
φ
19.1
φ
22.2
φ
15.9
φ
19.1
φ
25.4
φ
28.6
φ
6.4
φ
9.5
φ
9.5
φ
12.7
Capacity type of
indoor unit
gas pipe
liquid pipe
standar
d siz
e
max.
siz
e
standar
d siz
e
max.
siz
e
total length (m)
of liquid pipe
siz
e at
φ
22.2
×0.022
total length (m)
of liquid pipe
siz
e at
φ
6.4
×0.26
total length (m)
of liquid pipe
siz
e at
φ
19.1
×0.18
total length (m)
of liquid pipe
siz
e at
φ
15.9
×0.12
total length (m)
of liquid pipe
siz
e at
φ
12.7
×0.059
total length (m)
of liquid pipe
siz
e at
φ
9.5
Q8
0kg
Q18
0.7kg
Q28
4.1kg
Q38
4.8kg
Q48
6.0kg
Q10
0.7kg
Q20
2.1kg
Q30
3.7kg
Q40
6.2kg
Q12
2.1kg
Q22
2.8kg
Q32
4.0kg
Q42
4.7kg
Q14
1.7kg
Q24
4.2kg
Q34
2.7kg
Q44
6.1kg
Q16
2.0kg
Q26
2.7kg
Q36
4.1kg
Q46
5.7kg
(Example)
When outdoor unit is Q22
type and each piping
length is as r
ight.
a :
φ
15.9 × 40 m
b :
φ
15.9 × 5 m
c :
φ
9.5 × 35 m
d :
φ
9.5 × 35 m
e :
φ
9.5 × 35 m
f :
φ
9.5 × 35 m
g :
φ
9.5 × 30 m
h :
φ
9.5 × 20 m
i :
φ
12.7 × 20 m
j :
φ
6.4 × 20 m
k :
φ
6.4 × 20 m
r :
φ
12.7 × 3 m
s :
φ
9.5 × 5 m
∗
Note 1
Allo
w
a
b
le length after the first refr
iger
ant br
anch kit to indoor units is 40 m or less
, ho
w
e
v
er it can be e
xtended up to
90
m if all the f
ollo
wing conditions are satisfied.
(In case of
“ Branc
h with REFNET joint ”
)
*
If a
vailab
le on the site
,
use this siz
e
.
Otherwise it can not be
increased.
Required Conditions
Example Dr
a
wings
1.
It is necessar
y to increase the pipe siz
e if the pipe length betw
een the first br
anch
kit and the final br
anch kit is o
v
er than 40m.
(Reducers m
ust be procured on site)
If the increased pipe siz
e is larger than main pipe siz
e
, then increase the main pipe
siz
e to the same pipe siz
e
.
4.
The diff
erence betw
een
[Outdoor unit to the f
a
rthest indoor unit] and [Outdoor unit to the nearest indoor unit]
≤
40 m
2.
F
or calculation of
T
otal e
xtension length, the actual length of abo
v
e
pipes m
ust be
doub
led.
(e
xcept main pipe and the pipes that are not increased)
3.
Indoor unit to the nearest br
anch kit
≤
40 m
8 b+c+d+e+f+g+p
≤
90 m
increase the pipe siz
e of b
, c
, d, e
, f
, g
a+b×2+c×2+d×2+e×2+f×2+g×2
+h+i+j+k+l+m+n+p
≤
300 m
h, i, j.......
p
≤
40 m
The f
a
rthest indoor unit 8
The nearest indoor unit 1
(a+b+c+d+e+f+g+p)-(a+h)
≤
40 m
Increase the pipe siz
e as f
ollo
ws
φ
9.5
→ φ
12.7
φ
12.7
→ φ
15.9
φ
15.9
→ φ
19.1
φ
19.1
→ φ
22.2
φ
22.2
→ φ
25.4*
φ
28.6
→ φ
31.8*
φ
34.9
→ φ
38.1*
a
AB
C
D
E
F
G
bcd
e
f
g
hi
j
k
l
m
n
12
34
56
7
8
H1
p
Outdoor unit
REFNET joint (A-G)
Indoor units ( 1 - 8 )
*
φ
25.4 applicab
le in case of 290
≤
x <
420, if a
v
ailab
le on the site
.
Correction v
alue b
y
outdoor unit capacity
01_EN_3P226891-13Q.fm Page 9 Thursday, December 2, 2010 10:15 AM
