Daikin VRV IV RXYQ TYDN Series Engineering Data page 22

EDUS341411-N
Maximum allowable length after branch
130 ft. (40 m)
Example 1.1: unit 8: b+c+d+e+f+g+p 130 ft. (40 m)
Example 1.2: unit 6: b+h 130 ft. (40 m), unit 8: i+k 130 ft. (40 m)
Example 1.3: unit 8: 130 ft. (40 m)
1
a b c
2
A B
h i
3
1 2
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
130 ft. (40 m)
Example: h, I, j ... p 130 ft. (40 m)
b It is necessary to increase the pipe size of the gas and liquid piping
over 130 ft. (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:
3/8 1/2; 1/2
(3)
1-1/8 1-1/4 ; 1-3/8
Example: unit 8: b+c+d+e+f+g+p 295 ft. (90 m) and
b+c+d+e+f+g>130 ft. (40 m); increase the pipe size of b, c, d, e, f, g.
(3) If available on the site. Otherwise it cannot be increased.
c When the piping size is increased (step b), the piping length has to
are not increased in pipe size).
The total piping length has to be within limitations (see table above).
Example:
(1000 m).
d The piping length difference between the nearest indoor from the
unit is 130 ft. (40 m).
Example: The farthest indoor unit 8. The nearest indoor unit 1
(a+b+c+d+e+f+g+p)–(a+h) 130 ft. (40 m).
13
Installation of Outdoor Units
d e f g
C D E F G
p H1
j k l m n
3 4 5 6 7
8
H2
5/8; 5/8 3/4; 3/4 7/8; 7/8
(3)
1-1/2 ;
3280 ft.
7.5.3. System containing VRV indoor units and Mini-split
indoor units
System setup
a
A
H4
H5
H1
Header
BP unit
1 – 5 Mini-split indoor units
6, 7 VRV indoor units
Maximum allowable length
Between outdoor unit and indoor unit.
Actual piping
295 ft. (100 m)
length
393 ft. (200 m)
length (a)
(3)
1 ;
Total piping
820 ft. (250 m)
length
(a) Assume equivalent piping length of refnet joint = 1.6 ft. (0.5 m) and refnet header
= 3.3 ft. (1 m) (for calculation purposes).
Between BP unit and indoor unit.
<60
Remark:
Minimum allowable length
branch kit>16 ft. (5 m) (the refrigerant noise from the outdoor unit can
be transmitted).
Example: a>16 ft. (5 m)
Maximum allowable height difference
164 ft. (50 m) (131 ft. (40 m) (if outdoor is located below
H1
indoor units))
H2 49 ft. (15 m)
H4 131 ft. (40 m)
H5 49 ft. (15 m)
H6 16 ft. (5 m)
Maximum allowable length after branch
164 ft. (50 m).
Example: b+g+l 164 ft. (50 m)
unit is over 65 ft. (20 m), it is necessary to increase the gas and liquid
piping and gas piping size up.
Installation Manual
b d
B
c
e f g
BP1 6
BP2
k
1 2 3
H2
H6
l
4
5
Example:
a+b+g+l 295 ft. (100 m)
—
Example:
a+b+d+g+l+k+c+e+f+h+i+j 820 ft.
(250 m)
Pipe length
6.6 ft. – 49 ft. (2 – 5 m)
3P362438-1B English
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3P362438-1B
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