Daikin VRV IV RXYQ TYDN Series - 4.1.2 Equivalent Piping Length of Joints and Headers (Reference)

EDUS341411-N REFNET Pipe System
Installation of Outdoor Units 55
4.1.2 Equivalent Piping Length of Joints and Headers (Reference)
* When the equivalent piping length in cooling operation is calculated, the gas pipe size is selected.
When the equivalent piping length in heating operation is calculated, the liquid pipe size is selected.
Pipe Size *
 1/4 in.
(  6.4 mm)
 3/8 in.
(  9.5 mm)
 1/2 in.
(  12.7 mm)
 5/8 in.
(  15.9 mm)
 3/4 in.
(  19.1 mm)
 7/8 in.
(  22.2 mm)
 1 in.
(  25.4 mm)
 1-1/8 in.
(  28.6 mm)
 1-1/4 in.
(  31.8 mm)
 1-3/8 in.
(  34.9 mm)
 1-1/2 in.
(  38.1 mm)
 1-5/8 in.
(  41.3 mm)
L Joints
6-1/4 in.
(0.16 m)
7-1/8 in.
(0.18 m)
7-7/8 in.
(0.20 m)
9-7/8 in.
(0.25 m)
13-3/4 in.
(0.35 m)
15-3/4 in.
(0.40 m)
17-3/4 in.
(0.45 m)
19-5/8 in.
(0.50 m)
21-5/8 in.
(0.55 m)
23-5/8 in.
(0.60 m)
25-5/8 in.
(0.65 m)
29-1/2 in.
(0.75 m)
REFNET Joint
1.6 ft (0.5 m)
REFNET Header
3.3 ft (1.0 m)