Test Run / Air Purge - Hitachi YUTAKI M R32 Series Installation & Operation Manual

!
CAUTION
• Heating at lower water temperatures (approximately 10ºC to 15ºC) and lower outdoor ambient
temperatures (<10ºC) can be damaging to the heat pump when defrosting.
• As a result, Heating up to 15ºC when outdoor temperature is lower than 10ºC is performed by the
electrical heater.

NOTE
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.
!
CAUTION
It is recommended start the unit (first power ON) with heater forced OFF and compressor forced OFF
(See "6.2 Setting of DIP switches and RSW
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.
PMML0600 rev.0 - 06/2022
switches"). In order to circulate water by water pump and
Example for PC-ARFH2E
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