Daikin VRV-WIII, Installation Manual

Page: 17 / 22

English 12
Required Conditions
Example Dr
a
wings
1.
It is necessar
y to increase the liquid and suction gas 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
[Outside unit to the f
a
rthest indoor unit] and [Outside unit to
the nearest indoor unit]
≤
40 m
8 b+c+d+e+f+g+p
≤
90 m
increase the liquid and suction gas 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
liquid and suction gas 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
p
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.
Note 1.
When the equivalent pipe length between outside and indoor units is 80m or more, the size of main pipes on the liquid side (refer to figure 21) must be increased according to the right table. (Never increase suction gas pipe and HP/LP gas pipe.) (Refer to figure 21) 1.
Outside unit
2.
Main pipes
3.
Increase only liquid pipe size
4.
First refrigerant branch kit
5.
Indoor unit
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. (In case of “
Branch with REFNET joint
”)
System
RWEYQ8, 10PY1 RWEYQ16PY1 RWEYQ18 ~ 24PY1 RWEYQ26 ~ 30PY1
Liquid pipe
φ
9.5
→
φ
12.7
φ
12.7
→
φ
15.9
φ
15.9
→
φ
19.1
φ
19.1
→
φ
22.2
Outside unit
01_EN_3P153897-8L.fm Page 12 Friday, July 11, 2008 5:04 PM