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Outdoor unit capacity type
REYQ72, 96X type
REYQ120, 144X type
REYQ168-240X type
REYQ264-456X type
(*7) It can be extended to ≤295 ft. (90 m) with liquid piping of main pipe size up (see table size up for equivalent length from outdoor to indoor units
over 295 ft. (90 m) in this page) (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) F or Branch Selector unit connected in pass through installation, all three conditions below must be satisfied.
1. M aximum capacity index of connectable indoor units for BSF6, 8Q54T* is ≤162 per Branch Selector unit.
2. M aximum capacity index of connectable indoor units under Branch Selector units connected in pass through is ≤230.
3. T otal number of ports of Branch Selector units connected in pass through is ≤12.
(*9) W hen conditions listed in the table below are all satisfied, the allowable length restrictions after branch is ≤295 ft. (90 m). For Branch Selector
unit connected in pass through installation, also (*8) must be satisfied.
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).
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
φ3/8 in. (9.5 mm) →
φ1/2 in. (12.7 mm)
φ1/2 in. (12.7 mm) →
φ5/8 in. (15.9 mm)
φ5/8 in. (15.9 mm) →
φ3/4 in. (19.1 mm)
φ3/4 in. (19.1 mm) →
φ7/8 in. (22.2 mm)
Example: O nly 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:
φ3/8 in. (9.5 mm) → φ1/2 in. (12.7 mm)
φ1/2 in. (12.7 mm) → φ5/8 in. (15.9 mm)
φ5/8 in. (15.9 mm) → φ3/4 in. (19.1 mm)
φ3/4 in. (19.1 mm) → φ7/8 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)
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)
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