13
3
Draining volume = collector c volume collection pipe + expansion volume
Volumes
The volume of the collectors - see Table 1 on
page 22.
If the collectors are installed in several rows
one above the other, lateral collecting lines
are installed for hydraulic connection of the
collector row.
A collecting pipe set (2 collecting pipes)
contains 2 l of liquid.
In addition to the volume of the collectors, the
expansion of the liquid when the temperature
rises must also be taken into account.
Sample calculation:
6 collectors 240 H, two rows,
Collection pipe set
Filling quantity: 80 l
Volume collectors:
16 l
Volume collection pipe:
2 l
Volume expansion:
6 l
Total:
24
l
Step 3: Partial emptying of the system
After the emptying volume has been
determined, drain the exact volume from the
system.
To do this, connect a hose to the breather
unit (3) - see Figure 1 - which leads into
a collecting vessel. The ball valve on the
breather unit (3) is opened.
Continue to connect a hose to the filling unit
(7) - see Figure 4 // 10 - which also leads into
the collecting vessel.
The ball valve (7) is opened. The valves (8)
and (9) remain closed.
Now drain the exact volume from the system
according to the previous determination!
After the emptying volume has been drained,
the ball valve on the venting unit (3) and on
the filling unit (7) is closed.
Initial operation of the SolBox
First, determine the draining volume by using the overview below.
Depending on the system content of the solar
system, expansion volume must therefore
be drained - see Table 3.