Daikin VRV IV RXYQ TTJU Series, Engineering Data

Page: 21 / 91

Installation Manual EDUS341411-N
22 Installation of Outdoor Units
3P362438-1B
12 3P362438-1B English
7.5.2. System only containing VRV indoor units
System setup
Branch with refnet joint Branch with refnet joint and refnet header Branch with refnet header
Single outdoor
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
Example 1.1
a
b
c d e f
i
k
j
g h
A B
1 2 3 4 5 6
7 8
H1
H2
Example 1.2
a
c b d e f
i
g h
1 2 3 4 5 6 7
8
H1
H2
Example 1.3
Multi outdoor
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
Example 2.1
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
Example 2.2
a
b
1 2 3 4 5 6 7
8
c d e f g h i
t
u
r
s
H1
H3
Example 2.3
Indoor unit
Refnet joint
Refnet header
Outdoor multi con-
nection piping kit
Difference in height between outdoor and indoor units: H1.
Difference in height between indoor and indoor units: H2.
Difference in height between outdoor and outdoor units: H3.
Difference in height between outdoor and BP unit: H4.
Difference in height between BP unit and BP unit: H5.
Difference in height between BP unit and Mini-split indoor unit: H6.
Example 3: with standard multi layout
r s t
Maximum allowable length
r
Between outdoor and indoor units (standard multi/free multi combinations)
Actual piping
length 540 ft.
(165 m) Example 1.1
unit 8: a+b+c+d+e+f+g+p d 540 ft. (165 m)
Example 2.1
unit 8: a+b+c+d+e+f+g+p
d
540 ft. (165 m)
Example 1.2
unit 6: a+b+h d 540 ft. (165 m)
unit 8: a+i+k d 540 ft. (165 m)
Example 1.3
unit 8: a+i d 540 ft. (165 m)
Equivalent length (2) 623 ft.
(190 m) — — —
Total piping length 3280 ft.
(1000 m) Example 1.1
a+b+c+d+e+f+g+h+i+j+k+l+m+n+p d 3280 ft. (1000 m)
Example 2.1
a+b+c+d+e+f+g+h+i+j+k+l+m+n+p
d
3280 ft. (1000 m)
Example 1.2
a+b+c+d+e+f+g+h+i+j+k
d 3280 ft. (1000 m)
Example 1.3
a+b+c+d+e+f+g+h+I
d 3280 ft. (1000 m)
r Between outdoor branch and outdoor unit
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Actual piping
length 33 ft. (10 m) Example 3
r d 33 ft. (10 m)
s d 33 ft. (10 m)
t
d
33 ft. (10 m)
Equivalent length 43 ft. (13 m) —
Maximum allowable height difference
H1 d 164 ft. (50 m ) (130 ft. (40 m) (a) (if outdoor is located below indoor units))
H2
d
98 ft. (30 m)
H3 d 16 ft. (5 m)
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kit:
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Liquid piping size up (see table Size up for equivalent length for outdoor-
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130-197 ft. (40-60 m): minimum connection ratio connected: 80%.
197-213 ft. (60-65 m): minimum connection ratio connected: 90%.
213-262 ft. (65-80 m): minimum connection ratio connected: 100%.
262-295 ft. (80-90 m): minimum connection ratio connected: 110%.
Liquid piping size up (see table Size up for equivalent length for outdoor-indoor
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