Daikin REYQ-T7Y1B Technical Data Manual page 45

12 Installation
12 - 3 Refrigerant Pipe Selection
REYQ-T
Connection with VRV DX indoor units and air handling units
a
4
1
c
3
b
b
b
a Outdoor unit
b VRV DX indoor unit
c Multi BS unit
d BS unit
e EKEXV kit
f AHU
Pipe
Longest pipe from the outdoor unit or the last
multi-outdoor piping branch (1+2, 1+3, 1+5)
In case of a multioutdoor setup: longest pipe
from the outdoor unit to the last multi-outdoor
piping branch (4)
Total pipe length
(a) If the equivalent piping length is more than 90 m, size up the main liquid piping according to
"5.3.2 To select the piping size" on page 13.
• Outdoor Unit • REYQ-T
5
2
d
e
d
f
e
f
Maximum length (actual/equivalent)
165 m/190 m (a)
40 m/—
10 m/13 m
1000 m/—
• VRV Systems • REYQ-T
outdoor-unit combinations
Connection with only VRV DX indoor units
a
4
3
b b
a Outdoor unit
b VRV DX indoor unit
c Multi BS unit
d BS unit
e VRV DX indoor unit
Pipe
Longest pipe from the outdoor unit or the last
multioutdoor piping branch (1+2, 1+3, 1+5)
In case of a multi-outdoor setup: longest pipe
from the outdoor unit to the last multi-outdoor
piping branch (4)
Total pipe length
(a) If the equivalent piping length is more than 90 m, size up the main liquid piping according to
"5.3.2 To select the piping size" on page 13.
(*)
An extension to up to 90 m is possible if all of the following conditions are met:
1. In case of BS1Q units, the piping length between all indoor units and the nearest branch
2. In case of multi BS units, the piping length between all indoor units and the multi BS unit
3.
that in contrast to multi BS units, BS1Q units are NOT considered branch kits. If the
increased pipe size is larger than the pipe size of the main pipe, also increase the size of
the main pipe.
4. After sizing up the liquid piping (previous condition), double its length in the calculation of
the total piping length. Make sure the total piping length is within limitations.
5. The piping length difference between the nearest indoor unit to the outdoor unit and the
1 5
c
2
d
e
e
Maximum length (actual/equivalent)
135 m/160 m (a)
40 m/—(*)
10 m/13 m
500 m/—
4P35399 -1 _4
3
12
43