![background image](http://html1.mh-extra.com/html/daikin/ryyq8t7y1b/ryyq8t7y1b_installation-and-operation-manual_4701695019.webp)
RYYQ+RYMQ+RXYQ8~20T7Y1B
VRV IV System Air Conditioner
4P329765-1 – 2012.09
Installation and operation manual
14
9.5.2.
System only containing VRV DX indoor units
System setup
Example 3: with standard multi layout
Maximum allowable length
Between outdoor and indoor units (standard multi/free multi combinations)
Between outdoor branch and outdoor unit (only in case >20 HP)
Maximum allowable height difference
Maximum allowable length after branch
The pipe length from the first refrigerant branch kit to the indoor unit
≤
40 m.
Example 1.1: unit 8: b+c+d+e+f+g+p
≤
40 m
Example 1.2: unit 6: b+h
≤
40 m, unit 8: i+k
≤
40 m
Example 1.3: unit 8: i
≤
40 m
However, extension is possible if all below conditions are met. In this
case limitation can be extended up to 90 m.
1
Outdoor units
2
Refnet joints (A~G)
3
Indoor unit (1~8)
a.
The piping length between all indoor to the nearest branch kit is
≤
40 m.
Example: h, I, j … p
≤
40 m
b.
It is necessary to increase the pipe size of the gas and liquid
piping if the pipe length between the first and the final branch kit
is over 40 m.
If the increased pipe size is larger than the pipe size of the main
pipe, then the pipe size of the main pipe has to be increased as
well.
Increase the pipe size as follows:
9.5
→
12.7; 12.7
→
15.9; 15.9
→
19.1; 19.1
→
22.2; 22.2
→
25.4
(3)
; 28.6
→
31.8
(3)
; 34.9
→
38.1
(3)
Example: unit 8: b+c+d+e+f+g+p
≤
90 m; increase the pipe size
of b, c, d, e, f, g.
Branch with refnet joint
Branch with refnet joint and refnet
header
Branch with refnet header
Single outdoor
Example 1.1
Example 1.2
Example 1.3
Multi outdoor
Example 2.1
Indoor unit
Refnet joint
Refnet header
Outdoor multi
connection piping
kit
Actual piping length
165 m/
135 m
Example 1.1
unit 8: a+b+c+d+e+f+g+p
≤
165 m
Example 2.1
unit 8: a+b+c+d+e+f+g+p
≤
135 m
Example 1.2
unit 6: a+b+h
≤
165 m
unit 8: a+i+k
≤
165 m
Example 1.3
unit 8: a+i
≤
165 m
Equivalent length
(2)
190 m/
160 m
—
—
—
Total piping length
1000 m/
500 m
Example 1.1
a+b+c+d+e+f+g+h+i+j+k+l+m+n+p
≤
1000 m
Example 2.1
a+b+c+d+e+f+g+h+i+j+k+l+m+n+p
≤
500 m
—
—
a
A
h
i
j
k
l
m
n
B
C
D
E
F
G
p
b
c
d
e
f
1
2
3
4
5
6
7
8
g
H1
H2
a
b
c
d
e
f
i
k
j
g
h
A
B
1
2
3
4
5
6
7
8
H1
H2
a
c
b
d
e
f
i
g
h
1
2
3
4
5
6
7
8
H1
H2
a
A
h
i
j
k
l
m
n
B
C
D
E
F
G
p
b
c
d
e
f
1
2
3
4
5
6
7
8
g
t
u
r
s
H1
H3
a
j
k
b
1
2
3
4
5
6
7
8
c
d
e
f
g
h
t
u
r
s
B
A
H1
H3
H2
a
b
1
2
3
4
5
6
7
8
c
d
e
f
g
h
i
t
u
r
s
H1
H3
r
s
u
t
Actual piping length
10 m
Example 3
r, s, t
≤
10 m; u
≤
5 m
Equivalent length
13 m
—
H1
≤
50 m (40 m)
(a)
(if outdoor is located below indoor units)
(a) Conditional extension up till 90 m is possible without additional option kit:
In case the outdoor location is higher than indoor: extension is possible up till
90 m and following 2 conditions must be fulfilled:
Liquid piping size up (see table
"Size up" on page 12
).
Dedicated setting on outdoor unit is required (see service manual; ask advice
to your dealer).
In case the outdoor location is lower than indoor: extension is possible up till 90 m
and following 6 conditions must be fulfilled:
40~60 m: minimum connection ratio connected: 80%.
60~65 m: minimum connection ratio connected: 90%.
65~80 m: minimum connection ratio connected: 100%.
80~90 m: minimum connection ratio connected: 110%.
Liquid piping size up (see table
"Size up" on page 12
).
Dedicated setting on outdoor unit is required (see service manual; ask advice
to your dealer).
H2
≤
30 m
H3
≤
5 m
(3)
If available on the site. Otherwise it cannot be increased.
a
A
h
i
j
k
l
m
n
B
C
D
E
F
G
p
b
c
d
e
f
1
2
3
4
5
6
7
8
g
H1
H2
1
2
3
Summary of Contents for RYYQ8T7Y1B
Page 68: ......
Page 69: ......
Page 70: ......
Page 72: ...4P329765 1 2012 09 Copyright 2012 Daikin 4P329765 1 0000000U...