Installation manual
11 English
Required Conditions
Example Drawings (In case of “Branch with REFNET joint”)
1.
It is necessary to increase the pipe size between the first branch kit
and the final branch kit. (Reducers must be procured on site)
However, the pipes that are same pipe size with main pipe must 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 branch kit ≤ 40 m
4. The difference between
[Outdoor unit to the farthest 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 size 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 farthest 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 size as follows
φ 9.5 → φ12.7
φ12.7 → φ15.9
φ15.9 → φ19.1
φ19.1 → φ22.2
φ22.2 → φ25.4*
φ28.6 → φ31.8*
φ34.9 → φ38.1*
a
b
ijk mnp
cde f h
q
g
ABCDEFG
Outdoor unit
Function unit
1234567
8
REFNET joint
(A~G)
Indoor units ( 1 - 8 )
*If available on the site, use this size. 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 φ22.2
Total length(m)
of liquid piping
size at φ15.9
Total length(m)
of liquid piping
size at φ9.5
Total length(m)
of liquid piping
size at φ19.1
Total length(m)
of liquid piping
size at φ12.7
Total length(m)
of liquid piping
size at φ6.4
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 : RTSYQ20PAY1
Independent outdoor unit : RTSQ8PAY1, RTSQ12PAY1
Function unit : BTSQ20PY1
R =
40 × 0.18 + 25 × 0.12 + 50 × 0.059 + 80 × 0.022 = 14.91
a : φ15.9 × 10m
b : φ15.9 × 30m
c : φ12.7 × 20m
d : φ6.4 × 10m
e : φ6.4 × 10m
f : φ6.4 × 20m
g : φ6.4 × 20m
h : φ6.4 × 10m
i : φ6.4 × 10m
j : φ9.5 × 20m
k : φ9.5 × 10m
: φ9.5 × 10m
r : φ12.7 × 5m
s : φ9.5 × 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
RTSYQ10PA type
RTSYQ14PA type
RTSYQ16PA type
RTSYQ20PA type
Gas
φ22.2 → φ25.4 (*)
Not Increased
φ28.6 → φ31.8 (*)
Liquid
φ9.5 → φ12.7
φ12.7 → φ15.9
φ15.9 → φ19.1
RTSYQ10PAY1
RTSYQ14PAY1
RTSYQ16PAY1
RTSYQ20PAY1
—
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 to 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_3P201178-14S.fm Page 11 Friday, February 3, 2012 1:30 PM