7. Piping and refnet joint selection

7-1. Refrigerant piping system diagram

Example) in case of 6 indoor units installation

b

AB

a

g

1

A, B, C, D, E: Refnet joint

c

C

h

2

d

D

i

3

e

j

4

 

f

E

 

k

 

5

H2

 

 

6

H1

Max allowable

Distance between the farther

Less than 100m of piping length between outdoor unit and indoor unit

length

indoor unit

and outdoor unit

Example) a+b+c+d+e+f≤ 100 m (6 sets)

Allowable

Distance

difference between

Reverse fall difference : shorter than 50m, fall difference :

indoor unit

and outdoor unit

shorter than 30m (H1)

difference

Height difference between

Height difference between adjacent indoor units:

height

adjacent indoor units

shorter than 15m (H2)

 

Allowable length

Actual pipe

The distance from the first refnet joint to the indoor : shorter than 30m

length

example ) b+c+d+e+f≤ 30m b+c+i≤ 30m

after branching

The difference between the max piping length and min piping length from 1 refnet joint≤ 20m

 

 

 

 

 

 

7-2. Piping selection

 

Outdoor unit

Items

capacity

5.0HP

6.0HP

7.5HP

8.0HP

10.0HP

Outdoor unit ~ The first refnet joint piping

 

 

 

Liquid pipe

ø9.52mmXt0.8

 

ø12.70mm X t0.9

 

 

 

 

 

 

 

 

 

 

 

 

 

●distance between the farther

 

 

 

 

 

Piping size

 

indoor unit and outdoor unit :

 

 

 

 

 

Gas pipe

less than 50m, ø19.05mmXt1.2

ø25.40mm X t1.2

 

ø28.60mm X t1.2

 

 

 

 

 

 

 

●distance between the farther

 

 

 

 

 

 

 

 

 

 

 

 

 

indoor unit and outdoor unit :

 

 

 

 

 

 

 

 

50~70m, ø25.4mmXt1.2

 

 

 

 

Refnet joint ~ Refnet joint piping

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Liquid pipe

Capacity limit of rear

less than 16000W

 

ø9.52mm X t0.8

 

 

(size)

 

indoor unit side

more than 16000W

-

 

 

ø12.70mm X t0.9

 

 

 

 

 

 

 

 

 

 

 

 

less than 9000W

 

ø15.88mm X t1.0

 

 

 

 

 

 

 

 

 

 

 

Gas pipe

 

Capacity limit of rear

9000W~16000W

 

ø19.05mm X t1.2

 

 

(size)

 

indoor unit side

16000W~21000W

-

 

 

ø25.40mm X t1.2

 

 

 

more than 21000W

-

 

 

 

ø28.60mmXt1.2

 

 

 

 

 

 

 

 

Refnet joint - Indoor unit pipe

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Liquid pipe

Capacity limit of rear

less than 4700W

 

ø6.35mm X t0.7

 

 

(pipe size)

 

indoor unit side

more than 4700W

 

ø9.52mm X t0.8

 

 

 

 

 

 

 

 

 

 

 

Gas pipe

 

Capacity limit of rear

less than 4700W

 

ø12.70mm X t0.9

 

 

 

 

 

 

 

 

 

4700W~8500W

 

ø15.88mm X t1.0

 

 

(pipe size)

 

indoor unit side

 

 

 

 

 

 

 

 

 

 

more than 8500W

 

ø19.05mm X t1.2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

V33

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Samsung 3759 technical manual Piping and refnet joint selection, Refrigerant piping system diagram, Piping selection
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3759 specifications

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