Daikin REYQ72TTJU Installation Manual page 16

Note 3: When conditions listed in the table below are satisfied, the allowable length restrictions after branch may be≤295 ft. (90 m).
Necessary conditions
1. Upsize by 1 step 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 unit to the nearest refrigerant
branch kit is 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).
Note 4: Cooling-only units should make up≤50% of the total capacity of indoor units.
Note 5: In the case of a Multi BS unit, if a junction pipe kit (separately sold) is used for combining 2 lines, the actual piping length from the BS unit
and the indoor unit 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 by 1 step 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)
• 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)
Outdoor unit
a b c d e f
A B C D E
h i j k
BS BS BS BS BS
q
3 4 5 6
H
s
r
Indoor unit (1-8)
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
3P362438-3H English
REFNET joint
(A-G)
g
F G
p
m n
BS BS
9
7 8