¢
Limitation
The nearest indoor unit to the first separation tube.
The farthest indoor unit to the first separation tube.
c
b
a
H
H!
Limitation Diagram
Allowable pipe length (Actual pipe length)
Total pipe length
1,312 ft (400 m) or
less*
1
Total
Between outdoor unit and the farthest indoor unit
393 ft (120 m) or
less
a + b
Between the first separation tube and farthest indoor unit 295 ft (90 m) or less b
(The farthest indoor unit to the farthest separation tube) - (The
nearest indoor unit to the first separation tube)
196 ft (60 m) or less b - c
Between outdoor unit and nearest indoor unit 17 ft (5 m) or more a + c
Between outdoor unit and the first separation tube 10 ft (3 m) or more a
Allowable height difference
Between outdoor
unit and indoor unit
Outdoor unit is higher than indoor unit 164 ft (50 m) or less
H1
Outdoor unit is lower
than indoor unit
O.T.*
2
≥
23°F (-5°C)
131 ft (40 m) or less
O.T.*
2
< 23°F (-5°C)*
3
16 ft (5 m) or less
Between indoor unit
Outdoor unit is higher than indoor unit 164 ft (50 m) or less
H2
Outdoor unit is lower than indoor unit 131 ft (40 m) or less
*1: Total pipe length is limited by the condition that total refrigerant amount should not exceed the
following value.
•
6/8 ton: 44.1 lb (20.0 kg), 10 ton: 56.4 lb (25.6 kg)
*2: O.T.: Outdoor temperature
*3: 6/8 ton only (For operation range of outdoor unit, refer to "Operation range" in Chapter 3. OUT-
DOOR UNITS on page 03-18.)
2-2. Piping limitation - (06-18) - 2. Piping design
SYSTEM
DESIGN
SYSTEM
DESIGN
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