Daikin VRV III RXYQ-PY1K, Installation Manual, Page: 12 / 34

Installation manual
9
RXYQ8~1 RXYQ8~12P7YLK
VRVIII System air conditioner
4PW41760-1
Pipe siz
e selection
F
or an outdoor unit m
ulti installation (RXYQ20~36), select the
pipe siz
e in accordance with the f
ollo
wing figure
.
A,B,C.
Piping between outdoor unit and refrigerant branc
h kit
•
Choose from the f
ollo
wing tab
le in accordance with the outdoor unit total
capacity type
, connected do
wnstream.
Outdoor unit connection piping siz
e
D.
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
.
E.
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.
When the equiv
alent pipe length betw
een outdoor and indoor units is 90 m or more
, the siz
e of the main pipes (both gas side and
liquid side) m
ust be increased.
Depending on the length of the piping, the capacity ma
y drop
, b
ut e
v
en in such a case it is possib
le to increase the siz
e of th
e main pipes
.
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 refnet joint and refnet
header f
or RXYQ34P ((1x 16) + (1x 18))
If the outdoor unit is RXYQ34P and the piping lengths are as belo
w
A
= Outdoor system:
RXYQ34
B
=
T
otal capacity of indoor system:
116%
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 i
f all the f
ollo
wing conditions are fulfilled.
Required conditions
Example dra
wings
It is necessar
y to increase the pipe siz
e of the liquid and the gas pipe if the pipe length betw
een the first
and the final br
anch kit is o
v
er 40 m (reducers m
ust be procured on site).
If the increased pipe siz
e is larger than the pipe siz
e of the main pipe
, then the pipe siz
e of the main pipe
needs to be increased as w
ell.
indoor unit
8
:
b+c+d+e+f+g+p
≤
90 m
increase the pipe siz
e
of b
, c
, d, e
, f
, g
Increase the pipe siz
e as f
ollo
ws
* If a
v
ailab
le on the site
. Otherwise it can not be increased.
F
or calculation of total e
xtension length, the actual length of abo
v
e
pipes m
ust be doub
led.
(e
xcept main
pipe and the pipes that not increase the pipe siz
e)
a+b*2+c*2+d*2+e*2+f*2+g*2 +h+i+j+k+l+m+n+p
≤
1000 m
Indoor unit to the nearest br
anch kit
≤
40 m
h, i, j.......
p
≤
40 m
The diff
erence betw
een the distance of the outdoor unit to the f
a
rthest indoor unit and the distance of the
outdoor unit to the nearest indoor unit
≤
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
Note 2
If the pipe siz
e abo
v
e
the refnet header is Ø34.9 or more
,
KHRQ22M75H is required.
B
A
C
D
E
B
B
Outdoor unit capacity type
Piping siz
e (outer diameter) (mm)
Gas pipe
Liquid pipe
RXYQ8
Ø19.1
Ø9.5
RXYQ10
Ø22.2
16
Ø28.6
Ø12.7
RXYQ18~22
Ø15.9
RXYQ24
Ø34.9
RXYQ26~34
Ø19.1
RXYQ36
Ø41.3
Indoor or outdoor unit total capacity
Piping siz
e (outer diameter) (mm)
Gas pipe
Liquid pipe
<150
Ø15.9
Ø9.5
150
≤
x<200
Ø19.1
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
Indoor capacity type
Piping siz
e (outer diameter) (mm)
Gas pipe
Liquid pipe
20~50
Ø12.7
Ø6.4
63~125
Ø15.9
Ø9.5
200
Ø19.1
250
Ø22.2
Gas side
Liquid side
RXYQ8
Ø19.1
➞
Ø22.2
RXYQ8+10
Ø9.5
➞
Ø12.7
RXYQ10
Ø22.2
➞
Ø25.4
(a)
(a)
If not a
v
ailab
le
, increase is not allo
w
e
d
16
Ø12.7
➞
Ø15.9
RXYQ12
Ø28.6
—
RXYQ18~24
Ø15.9
➞
Ø19.1
RXYQ16~22
Ø28.6
➞
Ø31.8
(a)
RXYQ26~36
Ø19.1
➞
Ø22.2
RXYQ24
Ø34.9
—
—
Increase is not allo
w
e
d
RXYQ26~34
Ø34.9
➞
Ø38.1
(a)
RXYQ36
Ø41.3
—
— Increase is not allo
w
e
d
1
Outdoor unit
2
Main pipes
3
Increase
4
First refr
iger
ant br
anch kit
5
Indoor unit
1
5
2
4
3
The refr
iger
ant charge of the system m
ust be less
than 100 kg.
This means that in case the calculated
refr
iger
ant charge is equal to or more than 95
kg y
ou
m
ust divide y
our m
ultiple outdoor system into smaller
independent systems
, each containing less than
95 kg refr
iger
ant charge
.
F
or f
actor
y charge
, ref
er to the unit name plate
.
8~12
16~26
Y
≤
100%
100% <
Y
≤
120%
120% <
Y
≤
130%
0.5 0 0.5 0.5
1.0 0 0.5 0.5
1.5 0 0.5 0.5
1.5 0 0.5 1.0
kg kg kg kg
28~32
34+36
X
1...6
=
T
otal length (m) of liquid piping siz
e at
Øa
A
= Refr
iger
ant w
eight f
or heat pump system according to tab
le
B
= Refr
iger
ant w
eight f
or e
xceeding connection capacity of indoor unit according to tab
le
Y
= Indoor connection capacity
R
= [30x0.26]+[10x0.18]+[10x0.12]+[40x0.059]+[49x0.022]
+1.5+0.5
= 16.238
⇒
R = 16.2 kg
a :
Ø19.1x30
m
b :
Ø15.9x10
m
c :
Ø9.5x10
m
d :
Ø9.5x10
m
e :
Ø9.5x10
m
f :
Ø9.5x10
m
g :
Ø6.4x10
m
h :
Ø6.4x20
m
j :
Ø6.4x10
m
k :
Ø6.4x9
m
i :
Ø12.7x10
m
A
B
Ø9.5
➞
Ø12.7
Ø15.9
➞
Ø19.1
Ø22.2
➞
Ø25.4*
Ø12.7
➞
Ø15.9
Ø19.1
➞
Ø22.2
Ø28.6
➞
Ø31.8*
Ø34.9
➞
Ø38.1*
ab
c
d
e
f
g
H1
p
AB
C
D
E
F
G
12
3
4
5
6
7
8
H2
hi
j
k
l
m
n
1 2 3
1
Outdoor unit
2
Refnet joints (a~g)
3
Indoor units (1~8)