Test Run / Air Purge - Hitachi YUTAKI S COMBI Series Installation And Operation Manual

!
CAUTION
It is recommended start the unit (first power ON) with heater forced OFF and compressor forced
OFF (See "5.4.4.3 Additional hydraulic optional elements (For DHW)"). In order to circulate water by
water pump and remove possible air into the heater (Check heater completely filled).
8.4

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.
Example for PC-ARFH2E
This menu shows the following test to be launched:
8
• Unit Test Run
• Air Purge
• Screed Drying
• Pump down procedure
After "Test Run", "Air Purge" or "Pump down procedure" option is selected, the YUTAKI user
controller asks for the duration of the test.
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PMEN0645 rev.0 - 04/2023