Installation Manual
29
ENGLISH
Installation of Indoor Unit
Preparing the heating system
Prepare the system according to one of the recommended hydraulic piping diagrams which is speci-
fied by the manufacturer of the device. This is the only way to ensure reliable and effective operation
of the device. After connecting the device to the heating system, it is necessary to examine all circu-
lating pumps and electric motor valves if they function correctly.
The device must be connected to the heating system via rubber compensator or flexible pipes. The
latter must not be under tension in final position, this would worsen the devices noise and vibration
protection. In extreme cases this can also lead to damage to the device.
Quality of heating water
The quality of the water used in the heating system is very important. The water from the water sup-
ply is mostly suitable for use in the heating system. In new systems the impurities are a conse-
quence of welding, soldering, dirty pipes (oil, grease), etc. In case the impurities start accumulating
in the device this can worsen the flow and heat transfer, in worst cases also freezing of water in the
heat exchanger and consequently the destruction of the device.
• To protect the device from intake and accumulation of dirt in the heat exchanger you must install
the strainer on the return line, inlet into the device.
• A galvanic disconnection between individual elements of the heating system (i.e. boiler, con-
tainer ...) is obligatory.
In the case of using grey steel pipes in the heating system, it is necessary to degrease them (the
interior of the pipe) before connecting them to the heat pump.
The water in the heating system has to be in accordance with the requirements of standard VDI
2035 and must not contain microorganisms. The heating system has to be filled with soft water,
which has been added anti-corrosion and antibacterial agents for preventing corrosion. Before fill-
ing, the heating system has to be cleaned of all impurities.
The heating system has to be thoroughly vented. You must prevent air, including diffusion air enter-
ing the device.
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