Hitachi YUTAKI S80 Serie Manual De Instalación Y Funcionamiento página 88

!
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.

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 "5.5.3 Additional hydraulic optional elements (For
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.
This menu shows the following test to be launched:
• Unit Test Run
• Air Purge
• Screed Drying
• Pump down procedure
PMEN0648 rev.0 - 03/2023
DHW)"). In order to circulate water by
Air purge procedure:
• Duration
• Start air purge
Unit test run:
• Duration
• Mode (only for cooling mode)
• Start test run
Screed Drying:
• Circuit 1 setting temperature
• Circuit 2 setting temperature
• Start screed drying
8
79