Example Of Connection (R-410A Type) - Daikin VRV III REYQ8PY1 Service Manual

Si37-701

6. Example of Connection (R-410A Type)

Example of connection
(Connection of 8 indoor units)
Outdoor unit Indoor unit
side side
(3 pipes) (2 pipes)
Suction gas pipe Gas pipe
BS
HP/LP gas pipe
Unit
Liquid pipe Liquid pipe
Piping from outdoor unit to BS unit
Suction gas pipe
(Bold):3 pipes
HP/LP gas pipe
Liquid pipe
Piping from BS unit to indoor unit or
Piping from Refrigerant branch kit to
indoor unit used as cooling only
(Suction) gas pipe
(Thin):2 pipes
Liquid pipe
(*1) " " Indicate the Outdoor unit multi
connection piping kit.
(*2) In case of multi outdoor system, re-read
"outdoor unit" to "the first Outdoor unit
multi connection piping kit" as seen from
the indoor unit.
Between outdoor unit (*2)
and indoor unit
Maximum
allowable
length
Between first outdoor unit multi
connection piping kit and outdoor unit
(in case of multi system)
Between outdoor and indoor units
Allowable
height Between indoor and indoor units
difference
Between outdoor and outdoor units
Allowable length after the branch
Appendix
Branch with REFNET joint
Outdoor unit
a
b c
Single
A B C
outdoor
f
system
i k
B1 B2
REYQ
G
F
8~16 m o
j
g
1 2 3 4
B1 ~ B4 : BS Unit
: Indoor unit (Cool/Heat selection possible)
1 ~ 6
7 , 8 : Indoor unit (Cooling only)
First outdoor unit multi connection piping kit
Outdoor unit
r
s t
a
b c
Multi
A B C
outdoor
f
system
i k
REYQ
18~48
G
F
m o
g
1 2 3 4
B1 ~ B4 : BS Unit
: Indoor unit (Cool/Heat selection possible)
1 ~ 6
: Indoor unit (Cooling only)
7 , 8
Pipe length between outdoor unit (*2) and indoor unit ≤ 165m
Actual pipe
length Example 8 : a + b + c + d + e + s ≤ 165m
Equvalent pipe length between outdoor unit (*2) and indoor unit ≤ 190m (Note 1)
Equivalent
length (Assume eqivalent pipe length of REFNET joint to be 0.5m, that of REFNET header to be 1m, that of BSVQ100, 160 to be 4m, that of BSVQ250 to be 6m for calculation purposes)
Total piping length from outdoor unit (*2) to all indoor unit ≤ 1000m
Total extention length
Actual pipe length from first outdoor unit multi connection piping kit to outdoor unit ≤ 10m
Actual and
Equivalent pipe length from first outdoor unit multi connection piping kit to outdoor unit ≤ 13m
Equivalent
pipe length
Difference in height between outdoor unit and indoor unit (H1) ≤ 50m (Max 40m if the outdoor unit is below)
Difference in height
Difference in height between adjacent indoor units (H2) ≤ 15m
Difference in height
Difference in height between adjacent outdoor units (H3) ≤ 5m
Difference in height
Actual pipe length from first refrigerant branch kit (either REFNET joint or REFNET header) to indoor unit ≤ 40m (Note 2)
Actual pipe
Example 8 : b + c + d + e + s ≤ 40m
length
Branch with REFNET joint and header
Outdoor unit
REFNET joint (A~G)
a
d e
D E
n p
c
e g
B3 B4
r s
B1 B2
q
d
f h
5 6 7
1 2
8
B1 ~ B5 : BS Unit
: Indoor unit (Cool/Heat selection possible)
1 ~ 4 , 7 , 8
5 , 6 : Indoor unit (Cooling only)
Outdoor unit
r
s
REFNET joint (A~G) u
a
d e
D E
n p
c
e
r
S
B1 B2
q
d f
5 6 7
1 2
8
: BS Unit
B1 ~ B5
: Indoor unit (Cool/Heat selection possible)
1 ~ 4 , 7 , 8
: Indoor unit (Cooling only)
5 , 6
Example 6 : a + b +
Example 6 : b + ≤ 40m, 8: m + n + p ≤ 40m
Branch with REFNET header
Outdoor unit
REFNET joint (A~G)
REFNET header
m
a
A
b
B5
n p
B
b d
i
o
B1 B2
B3 B4 8
k
c e
j
3 4 5 6 7 1 2
B1 ~ B4 : BS Unit
: Indoor unit (Cool/Heat selection possible)
1 ~ 6
7 , 8 : Indoor unit (Cooling only)
Outdoor unit
REFNET joint (A~G)
r
t REFNET header
u
m
a
A
b
B5
n p
B
d
b
g i
o
B1 B2
B3 B4 8
k
c e
j
h
3 4 5 6 7 1 2
B1 ~ B4 : BS Unit
: Indoor unit (Cool/Heat selection possible)
1 ~ 6
: Indoor unit (Cooling only)
7 , 8
≤ 165m, 8 : a + m + n + p ≤ 165m Example 8 : a + o ≤ 165m
Outdoor unit
r s
u
Example 8 : o ≤ 40m

Example of Connection (R-410A Type)

REFNET header
j
f h
B3 B4 B5 B6
g m n o
i k
3 4 5 6 7
8
s t
REFNET header
j
f h
B3 B4 B5 B6
g m n o
i k
3 4 5 6 7
8
r ≤ 10m
(Equivalent length ≤ 13m)
u + s ≤ 10m
(Equivalent length ≤ 13m)
t
u + t ≤ 10m
(Equivalent length ≤ 13m)
413