Daikin VRV III Manual page 411

Installation
Piping connection procedure
• Make sure the length of the refrigerant piping between the BEV unit and the indoor unit is no more than 5m
and that the difference in height is at least 4m.
(1) Connection example for the indoor unit
• Only one indoor unit may be connected to each BEV unit.
Outdoor unit
(2) Height difference between indoor units
• Install the BEV unit in the 15m range of difference in height between the indoor units.
• Make sure the difference in height between the BEV unit and the indoor unit is no more than 4m.
Outdoor unit
(3) Allowable length after split (actual piping length)
B+C≤35m (length from the first branch piping to the indoor unit)
(4) Additional refrigerant amount
When measuring the amount of additional to refrigerant to fill, include the length of the liquid piping
between the BEV unit and the indoor unit.
Additional filling amount = a+b+c+d+e+f+g+h+i+j+k+l+m+n+p+q
Refer also to the installation manual included with the outdoor unit.
Outdoor unit
406
Gas piping
Liquid piping
BEV unit
Fig. 12
L = 5m or less
BEV
unit
BEV
unit
A B C
Example of refrigerant branch using a REFNET joint
a b c d
A B C D
h i j
1 2 3
Indoor unit (1-8)
BEV
unit
Outdoor unit
BEV
unit
REFNET joint
e f g p
E F G
k l m n
4 5 6 7
: http://splitoff.ru/tehn-doc.html
ED34-862
Adjusted to fit the
size of the piping
connection hole on
the indoor unit.
Fig. 13
BEV unit
q
8
Fig. 14
FXUQ-MA