Vaillant auroTHERM VFK 125 Installation Manual page 15

Fig. 5.5 Frames with gravel trays
Fig. 5.6 Direct screwed connection
Fig. 5.7 Fixing and blocking the mounting rail
Installation manual auroTHERM 0020057143_04
Flat roof installation 5
If gravel trays are used:
• Place large protection mats under the sy-
stem.
• Assembly frames based on the number of
collectors to be installed.
a Caution!
Before mounting the collectors, fill
the gravel trays on the first frame
with gravel or other suitable
weighting material, to give the sy-
stem stability.
h Note
For load weights and distances,
please see Tab. 5.1 and 5.2.
With screwed connection to the flat roof:
• Assembly frames based on the number of
collectors to be installed.
Note
h
For load weights and distances,
please see Tab. 5.1 and 5.2.
• Fix the frames on the roof.
a Caution!
The roof skin can break and cause
lack of tightness!
When installing the roof sealing sur-
faces, make sure the roof skin is ade-
quately protected.
• Fix the horizontal mounting rails to the
frame clamping elements.
• Compensate any difference in height by
moving the clamping elements.
• Pull the lower part of the clamping element
upward, now it can be moved and it enga-
ges again when released.
GB
13