Vaillant auroTHERM VFK 145 H Installation Manual page 36

5 Flat roof fitting and installation
▶ Restore the leak tightness of the roof skin
if necessary.
▶
Define the required rack clearances as described in the
chapter "Defining rack clearances".
▶ Drill the required holes at the defined positions.
▶ Secure the racks using fastenings that are suitable for
underground use.
–
Fastening material: Rust-proof
– Diameter of the fastenings: ≥ 10 mm
▶
Carry out an extraction test.
– Extraction force of the anchor bolt: ≥ 9 kN
▶ Mount as many racks as you need to hold the collectors.
Conditions: Type of installation: Floating installation (with load plates)
Preparing load plates
Caution.
Leak caused by destruction of the roof
skin.
In the event of destruction of the roof skin,
water may penetrate the building.
▶ Ensure adequate protection of the roof
skin during installation on roof sealing
surfaces.
▶ Place large-area, non-slip building pro-
tection mats underneath the installation
system.
▶
If the roof is covered with gravel, remove the gravel at
the places where you wish to position the load plates,
and use non-slip building protection mats to protect the
roof skin.
36
▶ Connect two load plates as shown in the illustration.
▶ Connect two additional load plates as shown in the illus-
tration.
Note
For each rack, you will need four load plates:
one pair each for the front and rear rack feet.
▶ Align the load plates approximately in their final position
on the flat roof.
▶ Insert the first hammer-head bolt centrally in the groove
between the first two load plates.
▶
To secure the hammer-head bolt, turn it by 90° in a
clockwise direction.
▶ Secure the second hammer-head bolt in the same way
between the other two load plates.
3
2
Screwing the rack onto load plates and aligning
▶ Take hold of the first rack already secured in the installa-
tion angle.
▶
Position the front rack feet above the hammer-head bolt
(1).
Installation manual auroTHERM, auroTHERM plus 0020100571_03
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