Hitachi YUTAKI M Bedienungsanleitung Seite 68

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CAUTION
• Heating at lower water temperatures (approximately 10°C to 15°C) and lower outdoor ambient
temperatures (<10°C) can be damaging to the heat pump when defrosting.
• As a result, Heating up to 15°C when outdoor temperature is lower than 10°C is performed by
the electrical heater.
• In case of Heater Forced OFF (by optional DIP switch setting) these condition is not performed
and heating is performed by Heat Pump. Hitachi is not responsible for its operation when
defrosting or starting at low water temperature conditions.
• It is recommended start the unit (first power ON) with heater forced OFF and compressor forced
OFF (See "6.4 Setting of DIP switches and RSW
pump and remove possible air into the heater (Check heater completely filled).
7.4 Test run / air purge
Test run is a working mode used when commissioning the installation. Some settings are made to
let the installer an easy job. Air purge function drives the pump in a way for evacuating air bubbles
in the installation.
PMEN0647 rev.0 - 11/2023
switches"). In order to circulate water by water
Example for PC-ARFH2E
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