Vaillant auroTHERM VFK 145/2 H Installation Manual page 26

5 Assembly
Only when two VFK Hs are on top of one
another
A
a
B
Fig. 5.19 Hydraulic connection (2 VFK H on top of one another)
3
Fig. 5.20 Hydraulic connections for the VFK 145/2/155
26
4
> Connect the collectors with the O-ring pipe
coupling (¬ Table 5.3, Item 7).
> Fix the connection with the clips.
b
a
> Connect the flow line (outlet with opening
1
for collector sensor, ¬ Table 5.3, Item 2)
at the top (1).
> Insert the collector sensor into the open-
ing provided in the flow line.
> Connect the return line (inlet, ¬ Table 5.3,
Item 3) at the bottom (2).
> Fit the 2 plugs (¬ Table 5.3, Item 4) with
2
the bleed openings (3 and 4) on the oppo-
site side of each collector.
> Secure the connections and plugs with the
clips (¬ Table 5.3, Item 5).
> Connect the collector flow and return lines
to the system with the connecting pipes.
> If necessary check the connections for
leaks.
Installation manual auroTHERM 0020100606_02
Caution!
Danger of damage to the
collectors!
The flat collector can be damaged
if the pipe coupler is not fitted cor-
rectly.
> Make sure that the clip (A)
slides into the slot in the O-ring
pipe coupler (B).
Danger!
Risk of death caused by
improper assembly!
If not fixed properly, the flat col-
lector can fall off and endanger
persons.
> After fixing each collector,
check that all screwed connec-
tions are tight and retighten
them if necessary.