Filling; Filling The Heating And Domestic Hot Water Side; Filling The Collector; Pressurising The Collector - Gebwell Aries Series Installation And Commissioning Manual

8 FILLING

8.1 Filling the heating and domestic hot
water side
The coil in the heat pump's tank contains water for the
heating system.

Fill the tank coil and the heating circuit using the
filling valve for the house's heating system.

Purge the system of air thoroughly.

Make sure that the system is at the correct pressure to
function. When filling, the pressure should be
approximately 0.5 bar. When the tank heats up, the
pressure should be 0.5–1.0 bar. Check the pressure as
the tank heats up.
It is not necessary to purge the air of the domestic hot
water tank after filling. Air will exit the tank as the
domestic hot water is used.
8.2

Filling the collector

Fill the collector with a mixture of water and geothermal
fluid that can withstand a temperature of -15°C.
Environmentally friendly bioethanol is recommended for
use as a geothermal fluid.
The collector should be filled via level tank F as shown in
the diagram. If the circuit is filled using a pump,
microbubbles are created, and these dissipate slowly,
causing underpressure alerts. For this reason, it is
advisable to fill the collector slowly.
The collection pipes for the collector should be installed
in such a way that air is able to escape from the collector's
level tank via valve G. The expansion tank must therefore
be located at the highest point, and the collection pipes
must not allow air pockets to form.
There is enough fluid in the collector when the fluid
pressure in the expansion tank is between 1/3 and 2/3.
Check strainer E by first closing valves A and B and
opening the filter cover. After cleaning the filter, first open
valve A, which will release the air from the filter chamber
into the expansion tank, F. Open valve B.
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8.3

Pressurising the collector

Pressurise the collector using an external booster pump.
Connect the pump and the return hose to valves C and D
as shown in the diagram. Use a strong hose or pipe with a
diameter of at least 30 mm. Close valve A while you
increase the pressure in the collector. Make sure that no
debris from the base of the container passes into the
suction hose. Keep an eye on collector pressure gauge I.
The pressure must not exceed 2 bar.
8.4

Pressure-test of the collector

A pressure test should be performed on the filled collector
as follows: increase the pressure to 2 bar and check the
pressure after half an hour. If the pressure drops over half
an hour, there is a leak in the system. Repair any leaks and
repeat the pressure test. Mark the pressure test as complete
in the Installation record when the pressure test is
successful.
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