System Piping (Length) Limitations - Daikin REYQ72TTJU Installation Manual

7 .5 . System piping (length) limitations
<Example of refrigerant piping (8 indoor units are connected)>
First outdoor unit
Outdoor unit
multi connection
piping kit (*1)
r
a
b
A
d
B-1
g
e f
D
1 2
(*1) " " represents an outdoor unit multi connection piping kit.
The outdoor unit multi connection piping kit must always be installed horizontally, paying attention to the installation restrictions indicated in
"8. Precautions on refrigerant piping".
<Example of connection (8 indoor units are connected)>
(1)
Outdoor unit
side
(1) Piping from the outdoor unit to the BS unit
Suction gas pipe
(3 lines): 3 pipes
High/Low pressure gas pipe
Liquid pipe
(2) Piping from the BS unit to the indoor unit, and from the refrigerant branch kit to the cooling-only indoor unit (Note 1)
(Suction) gas pipe
(2 lines): 2 pipes
Liquid pipe
Note 1: The 2-line gas pipe that is branched from the 3-line pipe and goes to the cooling-only indoor unit should be connected to the suction gas
pipe.
11
Outdoor unit
B2
,
t
REFNET joint (A-E)
c
B
j
B-2
k
i
h
3 4 5
(2)
Indoor unit
BS unit
side
B1 : BS unit (Multi BS)
B3 : BS unit (Single BS)
C
B-3
m
E
n
6 7
1 - 7 : Indoor unit (cooling/heating
selectable)
8 : Indoor unit (cooling only)
(Note 4)
p
o
8
3P362438-3H English