Daikin FXSQ63PVE4 [21/102] First indoor branch

Daikin FXSQ63PVE4 [21/102] First indoor branch
37 38
More Flexible System Design
Cooling Only / Heat Pump
More options for installation location
Long piping length
The long piping length provides more design flexibility, which can match even large-sized buildings.
For connection of only VRV
indoor units
Conditions of VRV indoor unit connection capacity
Connection capacity at maximum is 200%.
Connection ratio
Note:
*1 For the FXFQ25P and FXFQ25S models, maximum connection ratio is 130% for the entire
range of outdoor units.
If the operational capacity of indoor units is more than 130%, low airflow operation is enforced in all
the indoor units.
*Refer to page 47-48 for outdoor unit combination details.
50%–200%
Connection ratio
Single outdoor units
Double outdoor units
Triple outdoor units
Applicable
VRV indoor units
200%
Other VRV indoor
unit models*
1
200%
160%
130%
Connection ratio =
Total capacity index of the indoor units
Capacity index of the outdoor units
1. No special requirements up to 40 m. The maximum actual piping length can be 90 m, depending on conditions. Various conditions and requirements have to be met to allow utilisation of
90 m piping length. Be sure to refer to the Engineering Data Book for details of these conditions and requirements.
2. When level differences are 50 m or more, the diameter of the main liquid piping size must be increased. If the outdoor unit is above the indoor unit, a dedicated setting on the outdoor unit
is required. Refer to the Engineering Data Book and contact your local dealer for more information.
Maximum
allowable
level difference
Maximum
allowable
piping length
Between the outdoor units
and the indoor units
Between the indoor units
Between the outdoor units (Multiple use)
Between the first indoor branch and the farthest indoor unit
Between the outdoor branch and the last outdoor unit
Total piping length
Refrigerant piping length
30 m
5 m
q
s
r
r
a+b+c+d+e+f+g+h+i
a+f+g+h+i
f+g+h+i
k+p
165 m 190 m
1000 m
10 m 13 m
Actual piping length Equivalent piping length Example
Level Difference Example
If the outdoor unit is above.
If the outdoor unit is below.
p
q
k
First outdoor branch
f
a
b
First
indoor branch
Multiple use
*The rest of indoor units are
the same as for single use.
90 m
2
90 m
1
90 m
2
78.4 Pa
More options in the
opening/angle of louvre
Outstanding heat dissipation
effect in both hierarchical and
intensive arrangement
VRV IV outdoor unit condenser fans are
able to achieve external static pressures of
up to 78.4 Pa, ensuring efficient heat
dissipation and stable operations.
78.4 Pa
More options in the
opening/angle of louvre
Outstanding heat dissipation
effect in both hierarchical and
intensive arrangement
High external static pressure
Max.
30 m
Max.
90 m
165 m
190 m
1000 m
Max. equivalent piping length
90
m
2
Max. actual piping length
Max. total piping length
30
m
Max. level difference
between the indoor units
Max. level difference
between the outdoor units
and the indoor units
a
i
s
r
h
g
f
e
d
c
b
First indoor branch
Single use
Colours in the diagram above are merely for identifying pipes referenced with symbols such as a .
2
15 m higher
than VRV
FXDQ, FXSQ, FXMQ-P, FXAQ models
VRV IV
Cooling Only / Heat Pump
Maximum allowable
piping length
Minimum allowable piping length
When a mixed combination of VRV and residential indoor units is connected
or when only residential indoor units are connected
Maximum allowable
level difference
Between the outdoor unit
and the indoor unit
Between BP unit
and indoor unit
Between the indoor units
Between BP units
Between the first indoor branch and the farthest BP unit or
between the first indoor branch and the farthest VRV indoor unit
Total piping length
Refrigerant piping length
Between outdoor unit and the first indoor branch
15 m
15 m
l
m
n
n
o
a+b+c+d+e+f+g+h+i+j+k
b+c+g, b+c+d
a+b+c+g+k, a+b+c+d
h, i, j, k
a
120 m
100 m
250 m
2 m–15 m
2 m–12 m
2 m–8 m
50 m
*1
5 m
Actual
piping length
Example
Level Difference Example
50 m
If the outdoor unit is above.
If the outdoor unit is below.
If indoor unit capacity index < 60.
If indoor unit capacity index is 60.
If indoor unit capacity index is 71.
40 m
40 m
*1.
If the piping length between the first indoor branch and BP unit or VRV indoor unit is over 20 m, it is necessary to increase the gas and liquid piping size
between the first indoor branch and BP unit or VRV indoor unit. If the piping diameter of the sized up piping exceeds the diameter of the piping before the
first indoor branch kit, then the latter also requires a liquid piping and gas piping size up. Please refer to Engineering Data Book for details.
*When a mixed combination of VRV and residential indoor units is connected or when only residential indoor units are connected, connection ratio
must be 50% to 130% for cooling only models and 80% to 130% for heat pump models. Refer to page 48 for outdoor unit combination details.
Max. 50 m
Max.
40 m
Max.
40 m
Max.
15 m
Max.
15 m
a
o
l
n
d
c
b
g
f
e
First indoor branch
m
p
Max.
5 m
h i
VRV : VRV indoor unit
RA : Residential indoor unit
BP : BP unit
Outdoor unit above indoor unit :
Outdoor unit below indoor unit :
For mixed combination of VRV
and residential indoor units
j
k
Between the outdoor unit and the BP unit
p
5 m
Between the BP unit and the indoor unit
BP
RA RA
RA
RA
VRV
VRV
BP
*Colours in the diagram below are merely for identifying
pipes referenced with symbols such as a .
Equivalent
piping length

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