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Page 9 of 12
The Air-Stop
(Permanent Air Separator)
The Air-Stop was developed by PAW for the permanent degasification of the heat transfer
fluid in solar installations. Inside the Air-Stop, the separated air accumulates and be
evacuated via an air bleed valve when required.
Assembly
In order to guarantee the proper operation of the Air-Stop, it may
only be mounted vertically and with the air bleed valve upwards!
Operation
The solar station is equipped with a permanent
air
separator
(Air-stop,
6
) inside the supply line. The gases
which have been separated from the heat transfer fluid
accumulate inside the air-scoop. The air-scoop has to be
purged manually from time to time (after the commissioning
on a daily basis, later on depending on the amount of air on
a weekly/ and monthly basis). In order to achieve an
optimum efficiency of the solar installation, it should be
purged at the air-scoop
every six months
.
Please note:
After the air purge, it is important to double check
the pressure and if necessary to increase it to normal
operation pressure!
Optional: Compression fittings
Assembly instructions
1.
Push the union nut (
2
) onto the
copper tube (
1
); then push the brass
O-ring (
3
) onto the copper tube (
1
).
In order to guarantee a secure
transmission of force and seal, the
tube has to stick out out at least 1/8” of the sleeve.
2.
Put the insert (
4
) into the copper tube (
1
).
3.
The copper tube (
1
) was to be pushed right down into the sit of compression fitting (
5
) together
with the component parts (
2; 3; 4
).
4.
Tighten the union nut by hand. Later on tighten it of at least 1 complete turn with an appropriate
flat wrench.
Please take note: In order to absorb the tension caused by the expansion of the tubes, it is
necessary to incorporate adequate fittings (expansion joints) or tube bends (consisting of at
least 2 bends of 90°). If you are using the tube bends, please consider that the distance between
the bends has to be 20 times bigger than tube diameter [e.g. tube-Ø 22mm/
3/4” – distance
between the bends more than 44 cm/
15”].
> 3 mm/
1/8“
5
4
3
2
1