Daikin VRV Aurora Série Manuel D'installation page 16

(*6) In the case where the equivalent piping length from outdoor units to indoor units ≥295 ft. (90 m), make sure to upsize the liquid pipe of the main
pipe (see the figure below), referring to the table below. (Do not upsize the high/low pressure gas pipe and the suction gas pipe.)
Outdoor unit capacity type
RELQ 72,96 T type
RELQ 120,144 T type
RELQ 192,240 T type
(*7) It can be extended to ≤295 ft. (90 m) (if outdoor unit is lower than indoor unit, ≤195 ft. (60 m) by field setting [2-35] on page 33). See
[2-49]=Height difference setting on page 34.
(*8) When conditions listed in the table below are all satisfied, the allowable length restrictions after branch is ≤295 ft. (90 m).
Necessary conditions
1. Upsize the liquid pipe from the first
refrigerant branch kit to the final
refrigerant branch kit for the indoor
unit beyond 130 ft. (40 m).
• If upsizing is impossible, the condi-
tions are not satisfied.
• If the upsized line would become
larger than the main pipe, then the
main pipe should also be upsized.
2. The total piping length, calculated by
doubling the piping length as upsized
in 1 above, is ≤1640 ft. (500 m).
(The main pipe, and lines that are
not upsized, should not be doubled.)
3. The actual piping length from each
indoor units to the nearest refriger-
ant branch kit are all ≤130 ft. (40 m).
4. The difference between the actual
piping length from the outdoor unit
to the farthest indoor unit, and the
actual piping length from the outdoor
unit to the nearest indoor unit, is
≤130 ft. (40 m).
In the case of a multi Branch Selector unit, if a junction pipe kit (separately sold) is used for combining 2 lines, the actual piping length between the
multi Branch Selector unit and the indoor units should be ≤65 ft. (20 m).
This limitation can be extended beyond 65 ft. (20 m), if all of the three conditions below are satisfied.
1. Upsize the liquid line between the joined 2 branches and the indoor unit.
2. Actual pipe length between the multi branch selector box and the indoor unit needs to be ≤130 ft. (40 m).
3. Double the pipe length of upsized line between joined 2 branches and the indoor unit, when calculating the overall total piping length.
13
Liquid pipe
f3/8 in. (9.5 mm) →
f1/2 in. (12.7 mm)
f1/2 in. (12.7 mm) →
f5/8 in. (15.9 mm)
f5/8 in. (15.9 mm) →
f3/4 in. (19.1 mm)
Example: Only the allowable length after branch for the indoor unit 9 exceeds 130 ft. (40 m) in the
figure in the lower right
Upsize the liquid pipes b, c, d, e, f and g in the
figure in the right.
The upsizing specifications should be as fol-
lows:
f3/8 in. (9.5 mm) → f1/2 in. (12.7 mm)
f1/2 in. (12.7 mm) → f5/8 in. (15.9 mm)
f5/8 in. (15.9 mm) → f3/4 in. (19.1 mm)
f3/4 in. (19.1 mm) → f7/8 in. (22.2 mm)
a +b×2+c×2+d×2+e×2+f×2+g×2
+h+i+j+k+l+m+n+p+q+r+s
≤1640 ft. (500 m)
• i, j ∙∙∙, p≤130 ft. (40 m)
• h+q+r≤130 ft. (40 m)
• h+q+s≤130 ft. (40 m)
Actual piping length of 9 Actual piping length of 1
(a+b+c+d+e+f+g+p) − (a+h+q+r)
≤130 ft. (40 m)
First refrigerant
Outdoor units
branch kit
Branch
Selector
units
Main pipe
Upsize the liquid pipe
Outdoor unit
a b c d
A B C
h i j
B1 B2 B3
q
3 4
H
s
r
1 2
b+c+d+e+f+g+p>130 ft. (40 m)
From outdoor unit to the farthest indoor unit 9
From outdoor unit to the nearest indoor unit 1
Indoor
units
Branch Selector units (B1-B7)
REFNET joints
(A-G)
e f g
D E F G
p
k m n
B4 B5 B6 B7
9
5 6 7 8
Indoor unit (1-9)
3P477778-1J English