Trane Variable Refrigerant Flow System Mini Outdoor Unit Series Manual de instalación descargar pdf (Pagina 15)

VRF-SVN33A-EN 15

Refrigerant Piping

Refrigerant Piping Maximum Length and Height Differences

Figure 9. Y-joint connection

Figure 10. Y-joint and EEV kit connection

Table 8. Maximum refrigerant piping length and height differences for installations with Y-joints and EEV kits

Piping location

Piping length and

height difference

(ft [m])

Y-joint connection

(refer to Figure 9)

Y-joint and EEV kit

connection

(refer to Figure 10)

Maximum allowable

piping length

Mini outdoor unit to

indoor units

Actual length

The distance between the mini outdoor unit and the farthest indoor unit ≤

492 ft (150 m)

Example: 8 indoor units

a+b+c+d+e+f+g+p ≤ 492 ft (150 m)

Example: 6 indoor units

a+b+c+d+j ≤ 492 ft (150 m)

Equivalent length

The distance between a mini outdoor unit and the farthest indoor unit ≤

574 ft (175 m)

(a)

(a) If the equivalent length between an outdoor unit and the farthest indoor unit exceeds 295 ft (90 m), increase the gas pipe by one size.

Main pipe length

The main pipe (a) from the mini outdoor unit to the first Y-joint should be

less than 361 ft (110 m)

Total length The sum of the total length of pipes should be less than 984 ft (300 m)

Maximum allowable

height difference

Mini outdoor unit to

indoor units

Height

H1: Height difference between a mini outdoor unit and indoor unit < 164 ft

(50 m)

H2: Height difference between indoor units ≤ 49 ft (15 m)

Maximum allowable length after 

Y-joint

Actual length

The distance between the first Y-joint

and the farthest indoor unit ≤ 131 ft

(40 m)

Example: 8 indoor units

b+c+d+e+f+g+p ≤ 131 ft (40 m)

Allowable length between EEV kit

and an indoor unit ≤ 65 ft (20 m)

Example: h, l, j ≤ 65 ft (20 m)

Outdoor unit

Indoor units

Y-joints

EEV kit

Outdoor unit

Indoor units

Y-joints

1 2 ... 10 11 12 13 14 15 16 17 18 19 20 ... 51 52

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Trane Variable Refrigerant Flow System Mini Outdoor Unit Series Manual de instalación Pagina 15

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