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Subject to change without notice | 83061500aUK – Translation into English of the original German operating manual | ait-deutschland GmbH
Insulating the hydraulic
connections
Insulate the vibration isolators and the fixed piping of
the heating circuit laid outdoors with vapour-diffusion
impermeable insulation.
Insulate according to the relevant local standards, guidelines
and directives.
ATTENTION
Lay the fixed piping of the heating circuit outdoors
below the frost boundary.
Check that all hydraulic connections are leaktight.
Perform leak test…
Insulate all connection, connectors and pipes of the
heating circuit and the heat source.
deionised water is used than is the case if the system is
operated with salty, i.e. softened water.
Even drinking water softened beforehand contains dis-
solved, corrosive salts which, due to the use of different ma-
terials in the heating system, act as electrolytes and there-
fore accelerate corrosion processes. This can ultimately re-
sult in pitting.
ON THE SAFE SIDE WITH LOW-SALT OPERATION
The problems listed above do not occur at all with low-salt
operation, as the heating water contains neither corrosive
salts such as sulphates, chlorides and nitrates nor alkalising
sodium hydrogen carbonate. The corrosive properties of
deionised water are very low and in addition, scale cannot
form. This is the ideal approach for closed heating circuits, in
particular, because low oxygen input into the heating circuit
can also be tolerated.
In general, when the system is filled with deionised water,
the pH value sets itself within the ideal range due to “self-
alkalinisation”. If necessary, a pH value of 8.2 can be very
easily attained by adding chemicals. In this way, optimum
protection of the entire heating system is achieved.
MONITORING
Analytical recording and monitoring of the relevant water
values and the added conditioning substances is of decisive
importance. Therefore, they should be monitored regularly
using appropriate water test equipment.
Filling and venting the heating circuit…
Open the additional venting valve at the condenser of
the heat pump. Venting the condenser…
