Gebwell Aries 12, Installation And Commissioning Manual

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36 Aries Installation and Commissioning manual
13 HEAT PUMP
MAINTENANCE AND
SERVICING
To ensure the long life and trouble-free operation of your
heat pump, the following sections should be checked a
few times every year, and more frequently during the first
year. Also remember to maintain and inspect accessories
in accordance with these instructions.
13.1 Inspections
Remember to remove the plug (PT) from the socket during
servicing.
NOTE: The refrigerant circuit must only be serviced
by an authorised refrigeration technician.
General appearance and leaks
Check whether there are any visible fluid leaks, oil or
anything else that appears abnormal inside and outside the
heat pump. It is normal for a small amount of water to drip
from the safety valves due to pressure fluctuations.
Heating system
Check the heating system pressure to ensure liquid
circulation. The pressure should be 0.8–2.0 bar, depending
on the property. Check the correct operating pressure from
the INSTALLATION RECORD. If the pressure is too
low, add liquid via the network filling valve. If you have
to add liquid on a regular basis, please contact the
installation or service company.
Collector
Check the amount of fluid in the collector and add fluid
if necessary. After commissioning, it may be necessary
to add fluid for a few days – a few litres is within the
normal range. If the amount of liquid is too low, allow
the pump to operate normally, open the collector’s filling
valve and fill the tank with geothermal fluid. If it is
repeatedly necessary to add fluid, contact an installation
or servicing company. When the source pump starts up,
the fluid level in the tank should decrease slightly. It will
then increase correspondingly when the pump shuts off.
Any other behaviour is indicative of air in the system, the
wrong circulation direction or a blocked filter.
In a pressurised brine circuit, the liquid level should be
checked against the brine circuit pressure level. The
operating pressure should be 0.5–1.5 bar. If the pressure
is lower than that, you should increase the pressure. You
can add liquid using a booster pump.
Check and clean the collector’s strainer. The filter should
be inspected several times immediately after
commissioning. However, avoid opening the collector
unnecessarily. If the filter is dirty, the brine circuit’s
temperature difference will increase when the compressor
is running, which may cause the device to malfunction.
Inspecting the safety valves
Check the functionality of the safety valves annually by
turning the cap. Ensure that water comes out of the
overflow pipe.
13.2 Drainage of the hot water tank (LVV1)
The hot water tank (LVV1) is drained by siphoning.
Install a drainage valve on the cold water pipe or insert a
hose into the cold water connection.
13.3 Drainage of the heating system
Drainage of the heating water from the
compressor unit
If the compressor unit requires servicing, the compressor
unit’s heating system can be drained as follows:

Close shut-off valves VS1 and VS2

Open the lowest connectors and allow the liquid inside
the compressor unit to drain out

Loosen shut-off valve VS1 at the connection to allow
a small amount of air into the system
13.4 Drainage of the collector
Drainage of the compressor unit’s collector
If the compressor unit requires servicing, the compressor
unit’s collector can be drained as follows:

Close shut-off valves VS3 and VS4

Connect a hose to drainage valve VT2 on the lower
connector of the evaporator

Loosen shut-off valve VS3 at the connection to allow
a small amount of air into the system