30
30
30
30
36
07
12
7
07
7
07
36
12
30
30
30
30
07
30
30
30
30
36
07
12
7
07
7
07
36
12
30
30
30
30
07
47
Optimized Pipe Routes
A factor not often considered before installation is establishing an
optimum pipe route. This can be due to the limited choice of riser or
outdoor unit location. However, establishing an optimum pipe route and
order of unit attachment can realize significant reduction in pipe REFNET
joint sizes, as well as refrigerant charge
.
Example 1 – LINEAR PIPE ROUTE
Example 2 - BRANCHING PIPE ROUTE
MAIN LINE
PIPING
(ODU to
Last REFNET)
JOINT
SIZES
70 ft of 1
1
⁄
8
5 x Large
(size 72)
20 ft of
7
⁄
8
2 x Med
(size 33)
4 ft of ¾
1 x Small
(size 22)
(NO
5
⁄
8
)
TOTAL REFRIGERANT:
37.5 lbs.
MAIN LINE
PIPING
(ODU to
Last REFNET)
JOINT
SIZES
32 ft of 1
1
⁄
8
3 x Large
(size 72)
2 ft of
7
⁄
8
1 x Med
(size 33)
19 ft of ¾
4 x Small
(size 22)
48 ft of
5
⁄
8
TOTAL REFRIGERANT:
34.6 lbs.
Summary of Contents for VRV
Page 1: ...VRV Reference Guide ...
Page 4: ......
Page 5: ...System Overview ...
Page 18: ...Piping and Electrical Wiring Guide Condensing Unit Pipe Connections 18 ...
Page 22: ......
Page 23: ...System Selection ...
Page 41: ...Design Optimization ...
Page 53: ...Controls Standards ...
Page 65: ...65 Notes ...
Page 66: ...66 Notes ...
Page 67: ......
