Daikin REYQ72TAYCU Manuel D'installation page 16

(*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≤3280 ft.
(1000 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).
13
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
≤3280 ft. (1000 m) <REYQ-T type>
• 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)
Branch Selector units (B1-B7)
REFNET joints
Outdoor unit
(A-G)
a b c d e f
A B C D E
h i j k
B1 B2 B3 B4 B5
q
3 4 5 6
H
s
r Indoor unit (1-9)
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
3P362438-9J
g
F G
p
m n
B6 B7
9
7 8
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