Daikin VRV IV Manuel D'installation page 15

7 .5 .2 . System only containing VRV indoor units
System setup
Branch with refnet joint
Single outdoor
Multi outdoor
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.
Example 3: with standard multi layout
r s t
Maximum allowable length
• Between outdoor and indoor units (standard multi/free multi combinations).
Actual piping 540 ft.
(165 m)
length
Equivalent length 623 ft. (2)
(190 m)
Total piping length 3280 ft.
(1000 m)
(2) See [7.3.3]= on page 10.
• Between outdoor branch and outdoor unit
(in case of multi outdoor units).
(only in case ≥192 type)
Actual piping 33 ft. (10 m) Example 3
length
Equivalent length 43 ft. (13 m)
English
a b c d e f g
H1
A B C D E F G
p
h i j k l m n
1 2 3 4 5 6 7
8
H2
Example 1 .1
H3
r s
t
u
a b c d e f g
H1
A B C D E F G
p
h i j k l m n
1 2 3 4 5 6 7
8
Example 2 .1
Example 1 .1
unit 8: a+b+c+d+e+f+g+p≤540 ft. (165 m)
Example 2 .1
unit 8: a+b+c+d+e+f+g+p≤540 ft. (165 m)
—
Example 1 .1
a+b+c+d+e+f+g+h+i+j+k+l+m+n+p≤3280 ft. (1000 m)
Example 2 .1
a+b+c+d+e+f+g+h+i+j+k+l+m+n+p≤3280 ft. (1000 m)
r≤33 ft. (10 m)
s≤33 ft. (10 m)
t≤33 ft. (10 m)
—
Branch with refnet joint and refnet header
i
a
A B
b j
H1
7 8
c d e f g h
1 2 3 4 5 6
Example 1 .2
H3
t
r
s
u a
A A B
b b
j
7
H2
c d e f g h
1 2 3 4 5 6
Example 2 .2
Example 1 .2
unit 6: a+b+h≤540 ft. (165 m)
unit 8: a+i+k≤540 ft. (165 m)
—
Example 1 .2
a+b+c+d+e+f+g+h+i+j+k
≤3280 ft. (1000 m)
Maximum allowable height difference
≤164 ft. (50 m ) (130 ft. (40 m)
H1
≤98 ft. (30 m)
H2
≤16 ft. (5 m)
H3
(a) Conditional extension up till 295 ft. (90 m) is possible without additional option
kit:
In case the outdoor location is higher than indoor: extension is possible up till
295 ft. (90 m) and following 2 conditions must be fulfilled:
• Liquid piping size up (see table Size up for equivalent length for outdoor-
indoor units over 295 ft. (90 m) on page 10).
• Dedicated setting on outdoor unit is required (see [2-49]= on page 34).
In case the outdoor location is lower than indoor: extension is possible up till
295 ft. (90 m) and following 6 conditions must be fulfilled:
• Liquid piping size up (see table Size up for equivalent length for outdoor-
indoor units over 295 ft. (90 m) on page 10).
• Dedicated setting on outdoor unit is required (see [2-35]= on page 34).
Branch with refnet header
a
k
H2
b c d e f g h
1 2 3 4 5 6 7
H2
Example 1 .3
H3
r t
s
u
a
H1
k
8
b c d e f g h
1 2 3 4 5 6 7
Example 2 .3
Example 1 .3
unit 8: a+i≤540 ft. (165 m)
—
Example 1 .3
a+b+c+d+e+f+g+h+I
≤3280 ft. (1000 m)
(a) (if outdoor is located below indoor units))
H1
i
8
H1
i
8
12