Daikin VRV III Manual page 21

Features
Large capacities for large-sized buildings
Extended long piping length
Piping length is drastically extended! The long piping length provides more design flexibility, which can match
even large-sized buildings.
Max. actual piping length
VRVII MA series
165
150
m
Max. equivalent piping length
VRVII MA series
190
175
m
Max. total piping length
VRVII MA series
1000
510
m
Max. level difference
between the outdoor units
and the indoor units
RXQ8PA-54PA
Outdoor unit above indoor unit:
90
VRVII MA series
Outdoor unit
2. Level differences above 50 m
above indoor unit:
are available on request.
Outdoor unit below indoor unit:
50
m
Outdoor unit
below indoor unit:
RXQ5PA
40
Outdoor unit above indoor unit:
m
Outdoor unit below indoor unit:
Maximum
allowable
piping length
Maximum
allowable
level difference
1. No special requirements up to 40 m. The maximum actual piping length can be 90 m, or less 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 for details of these
conditions and requirements.
2. Level differences above 50 m are not supported by default but are available on request for RXQ8PA-54PA. (If the outdoor unit is above the
indoor unit.)
16
m
m
m
Single use
2
m
First indoor branch
90
m
r
50
m
Colours in the diagram above are merely for identifying pipes referenced with symbols such as a .
40
m
Refrigerant piping length
Total extension length
Between the first indoor branch and the farthest indoor unit
Between the outdoor branch and the last outdoor unit
Between the outdoor units (Multiple use)
Between the indoor units
If the outdoor unit is above.
If the outdoor unit is below.
Between the outdoor units
and the indoor units
If the outdoor unit is above.
If the outdoor unit is below.
Multiple use
k
q
p
First outdoor branch
a
g
f
h
b c d
Actual
Example
piping length
165 m or less a+f+g+h+i
1000 m or less a+b+c+d+e+f+g+h+i
1
90 m or less* * f+g+h+i
10 m or less k+p
Level
Example
Difference
5 m or less q
15 m or less s
Available on request
2
r
90 m or less
90 m or less r
50 m or less r
40 m or less r
: http://splitoff.ru/tehn-doc.html
ED34-862
First
indoor branch
f
a
b
*The rest of indoor units are
the same as for single use.
e
i
s
Equivalent
piping length
190 m or less
—
—
13 m or less
Outdoor Units
RXQ8PA-54PA
—
RXQ8PA-54PA
RXQ5PA
General Information