Daikin VRV III REMQ72PBYD, Engineering Data

Page: 54 / 130

EDUS391004-N Installation
Installation of Outdoor Units 53
6-5 Example of connection
Example of connection (Connection of
8
indoor
u
nits)
(*1) “ ” Indicate the O
u
tdoor
u
nit m
u
lti
connection piping kit. (*2) In case of m
u
lti o
u
tdoor system, re-read
“o
u
tdoor
u
nit” to “the first O
u
tdoor
u
nit
m
u
lti connection piping kit” as seen from
the indoor
u
nit.
Branch with REFNET joint
Branch with REFNET joint and header
Branch with REFNET header
Sin
g
le
outdoor
system
Multi
outdoor
system
O
u
tdoor
u
nit
O
u
tdoor
u
nit
O
u
tdoor
u
nit
O
u
tdoor
u
nit
O
u
tdoor
u
nit
REF
N
ET joint (A
~
G)
REF
N
ET joint (A
~
G)
Indoor
u
nit ( 1
~
8
)
( )
RXYQ72
~
120PBYD
RXYQ72
~
144PBTJ
( )
RXYQ144
~
360PBYD
RXYQ16
8~
360PBTJ
REF
N
ET joint (A
~
G)
REF
N
ET header
REF
N
ET header
First o
u
tdoor
u
nit m
u
lti connection piping kit
REF
N
ET joint (A
~
G)
REF
N
ET header
REF
N
ET header
Maximum allowable
len
g
th
Allowable
hei
g
ht
difference Allowable len
g
th after the branch
Bet
w
een o
u
tdoor
u
nit (*2)
and indoor
u
nit
Bet
w
een first o
u
tdoor
u
nit m
u
lti
connection piping kit and o
u
tdoor
u
nit
(in case of m
u
lti system)
Bet
w
een o
u
tdoor and indoor
u
nits
Bet
w
een indoor and indoor
u
nits
Bet
w
een o
u
tdoor and o
u
tdoor
u
nits
Act
u
al pipe
length E
qu
i
v
alent
length Act
u
al and
E
qu
i
v
alent
pipe length Act
u
al pipe
length Difference in height Difference in height Difference in height Total extension length
Pipe length
b
et
w
een o
u
tdoor
u
nit (*2) and indoor
u
nit
<
540 ft
Example
8
: a +
b
+ c + d + e + o
<
540 ft
Example 6 : a +
b
+ h
<
540 ft,
8
: a + i + j
<
540 ft
Example
8
: a + i
<
540 ft
E
qu
i
v
alent pipe length
b
et
w
een o
u
tdoor
u
nit (*2) and indoor
u
nit
<
620 ft (
N
ote 1)
(Ass
u
me e
qu
i
v
alent pipe length of REF
N
ET joint to
b
e 1.6 ft, that of REF
N
ET header to
b
e 3.3 ft, for calc
u
lation p
u
rposes)
Total piping length from o
u
tdoor
u
nit (*2) to all indoor
u
nit
<
32
8
0 ft
Act
u
al pipe length from first o
u
tdoor
u
nit m
u
lti connection piping kit to o
u
tdoor
u
nit
<
33 ft
E
qu
i
v
alent pipe length from first o
u
tdoor
u
nit m
u
lti connection piping kit to o
u
tdoor
u
nit
<
43 ft
Act
u
al pipe length from first refrigerant
b
ranch kit (either REF
N
ET joint or REF
N
ET header) to indoor
u
nit
<
130 ft (
N
ote 2)
Example
8
:
b
+ c + d + e + o
<
130 ft
Difference in height
b
et
w
een o
u
tside
u
nit and indoor
u
nit (H1)
<
164 ft (*3)(
Max 295 ft if the o
u
tside
u
nit is
b
elo
w
(*4)
Difference in height
b
et
w
een adjacent indoor
u
nits (H2)
<
49 ft
Difference in height
b
et
w
een adjacent o
u
tdoor
u
nits (H3)
<
16 ft
O
u
tdoor
u
nit
r
<
33 ft
(E
qu
i
v
alent length
<
43 ft)
s
≤
33 ft
(E
qu
i
v
alent length
<
43 ft)
t
<
33 ft
(E
qu
i
v
alent length
<
43 ft)
Example 6 :
b
+ h 130 ft,
8
: i + j 130 ft
Example
8
: i 130 ft
a
b
c
d
e
a
b
c
d
e
H1
H1
H1
H2
o
n
m
k
f
h
g
i
h
g
m
k
G
F
j
AB
C
D
E
H1
o
n
AB
C
D
E
12
34
567
8
H2
G
F
12
34
567
8
Indoor
u
nit ( 1
~
8
)
Indoor
u
nit ( 1
~
8
)
Indoor
u
nit ( 1
~
8
)
Indoor
u
nit ( 1
~
8
)
Indoor
u
nit ( 1
~
8
)
a
a
i
i
cd
ef
g
h
A
A
B
H2
12
3
4
5
6
7
8
H3
r
t
H3
H3
r
t
a
b
cd
g
h
B
8
H2
r
t
a
12
3
4
5
6
7
b
c
j
b
e
f
d
c
b
e
fg
d
i
gh
H2
H1 H1
12
3
4
5
6
7
8
12
3
4
5
6
7
8
i
h
H2
r
t
ef
O
u
tdoor
u
nit
f
j
ij
k
k
s
s
s
s
(*3) This can
b
e extended to 295 ft
w
ith a replacement o
u
tdoor
u
nit PCB.
(*4) If the difference
b
et
w
een the o
u
tdoor
u
nit and indoor
u
nit is greater than 164 ft, the li
qu
id line m
u
st
b
e increased
b
y one size.
(*1) Indicates the O
u
tside
u
nit m
u
lti-connection piping kit.
(*2) In case of m
u
lti o
u
tdoor system, re-read “o
u
tside
u
nit” to “the first O
u
tside
u
nit m
u
lti connection piping kit” as seen from the indoor
u
nit.
3P215731-10R