11
English
Required Conditions
Example Dr
awings (In case of “
Branch with REFNET joint
”)
1.
It is necessar
y to increase the pipe siz
e betw
een the first br
anch kit
and the final br
anch kit.
(Reducers m
ust be procured on site)
Ho
w
ev
e
r,
the pipes that are same pipe siz
e with main pipe m
ust not
be increased.
2. For calculation of Total extension length, the actual length of
above pipes must be doubled. (except main pipe and the
pipes that are not increased)
3.
Indoor unit to the nearest br
anch kit
≤
40 m
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
8 c+d+e+f+g+h+q
≤
90 m
increase the pipe siz
e of c
, d, e
, f
, g, h
a+b+c×2+d×2+e×2+f×2+g×2
+h×2+i+j+k+ +m+n+p+q
≤
500 m
i, j.......
p
, q
≤
40 m
The f
a
rthest indoor unit 8
The nearest indoor unit 1
(a+b+c+d+e+f+g+h+q)-(a+b+i)
≤
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
b
ij
k
m
n
p
cd
e
f
h
q
g
ABC
D
EF
G
Outdoor unit
Function unit
12
3
4
5
6
7
8
REFNET joint
(A~G)
Indoor units ( 1 - 8 )
*If a
vailab
le on the site
, use this siz
e
. Otherwise it can not be increased.
How to calculate the
additional refrigerant
to be charged
Additional refrigerant to
be charged : R(kg)
R should be rounded
off in units of 0.1 kg.
R =
Total length(m)
of liquid piping
size at
φ
22.2
Total length(m)
of liquid piping
size at
φ
15.9
Total length(m)
of liquid piping
size at
φ
9.5
Total length(m)
of liquid piping
size at
φ
19.1
Total length(m)
of liquid piping
size at
φ
12.7
Total length(m)
of liquid piping
size at
φ
6.4
0.37
0.18
0.059
0.26
0.12
0.022
FOR THE SYSTEM
SYSTEM NAME
THE AMOUNT OF REFRIGERANT
Example for refrigerant branch using REFNET joint and REFNET header for the systems and each pipe length as shown below.
System : RTSYQ20PY1
Independent outdoor unit : RTSQ8PY1, RTSQ12PY1
Function unit : BTSQ20PY1
R =
40 × 0.18 + 25 × 0.12 + 50 × 0.059 + 80 × 0.022 = 14.91
a :
φ
15.9 × 10m
b :
φ
15.9 × 30m
c :
φ
12.7 × 20m
d :
φ
6.4 × 10m
e :
φ
6.4 × 10m
f :
φ
6.4 × 20m
g :
φ
6.4 × 20m
h :
φ
6.4 × 10m
i :
φ
6.4 × 10m
j :
φ
9.5 × 20m
k :
φ
9.5 × 10m
:
φ
9.5 × 10m
r :
φ
12.7 × 5m
s :
φ
9.5 × 10m
a, b
c, r
j, k, , s
d~i
14.9kg
Round off in units of 0.1 kg.
Note 1.
When the equivalent pipe length between
outdor (*2) and indoor units is 90m or
more, the size of main pipes (figure on
right) must be increased according to the
right table.
System
RTSYQ10 type
RTSYQ14 type
RTSYQ16 type
RTSYQ20 type
Gas
φ
22.2
→
φ
25.4 (*)
Not Increased
φ
28.6
→
φ
31.8 (*)
Liquid
φ
9.5
→
φ
12.7
φ
12.7
→
φ
15.9
φ
15.9
→
φ
19.1
RTSYQ10PY1
RTSYQ14PY1
RTSYQ16PY1
RTSYQ20PY1
—
1.3kg
2.3kg
—
Note 2. Allowable length after the first refrigerant branch kit to indoor units is 40m or less, however it can be extended up t
o 90m if all the following conditions are satisfied.
(*)
If available on the site, use this size.
Otherwise, it can not be increased.
Outdoor unit
Indoor
unit
Function unit
First refrigerant
branch kit
Inclease gas and liquid
pipe size both.
In case of single outdoor unit system
Main pipes
Outdoor unit
Indoor
unit
Function unit
First refrigerant
branch kit
Inclease gas and liquid
pipe size both.
In case of multi outdoor unit system
Main pipes
01_EN_3P201178-10P.fm Page 11 Wednesday, September 2, 2009 11:10 AM
