Vaillant auroTHERM exclusive VTK SERIES Installation Manual download pdf (Page 19)

On-roof fitting and installation 4

0020077994_02 auroTHERM exclusive Installation manual 19

4.1.6 Determining the number of required roof

brackets

1. Ask the local building authority for the regional max-

imum snow load s

Conditions: Maximum snow load: ≤ 3 kN/m²

▶ Install 4 roof brackets per collector.

Conditions: Maximum snow load: 3 < × ≤ 4.5 kN/m²

▶ Install 6 roof brackets per collector.

Conditions: Maximum snow load: > 4.5 kN/m²

▶ Compile statistics for the individual case.

▶ Ensure that the maximum permissible snow load per

collector is 5.4 kN/m².

Note

The maximum permissible load per roof

bracket type S/type P is: F

max

= 1.875 kN.

2. If you are using extension sets, ensure that the roof

bracket is positioned centrally with equal clearances.

4.1.7 Defining the edge clearances of the roof

brackets

Maximum lift points caused by wind loads can occur at

the cut-away edges of wall and roof areas (e.g. verge and

eaves). These maximum lift points result in high loads on

the collectors and installation systems.

Areas in which lift points occur are called edge areas.

Corner areas are zones in which edge areas overlap and

especially high pull forces occur.

Edge and corner areas must not be used as installation

areas.

lang

kurz

b Building width

h Building height

l Building length

▶ Calculate the building width w, building height h and

building length l.

▶ The values for the edge clearances to be observed, e

short

and e

long

can be found in the following tables.

[m]

H [m]

5 6 7 8 9 10 11 12 13 14 15

8 1.0

9 1.0

10 1.0

11 1.0 1.1

12 1.0 1.2

13 1.0 1.2 1.3

14 1.0 1.2 1.4

15 1.0 1.2 1.4 1.5

16 1.0 1.2 1.4 1.6

17 1.0 1.2 1.4 1.6 1.7

18 1.0 1.2 1.4 1.6 1.8

[m]

h [m]

5 6 7 8 9 10 11 12 13 14 15

10 1.0

11 1.0 1.1

12 1.0 1.2

13 1.0 1.2 1.3

14 1.0 1.2 1.4

15 1.0 1.2 1.4 1.5

16 1.0 1.2 1.4 1.6

17 1.0 1.2 1.4 1.6 1.7

18 1.0 1.2 1.4 1.6 1.8

19 1.0 1.2 1.4 1.6 1.8 1.9

20 1.0 1.2 1.4 1.6 1.8 2.0

▶ When installing the roof brackets, observe the calculated

edge clearances.

4.1.8 Defining the roof bracket clearances

The roof brackets have different clearances depending on

the array configuration of the collectors (adjacent or on top

of each other).

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Vaillant auroTHERM exclusive VTK SERIES Installation Manual Page 19

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