Hitachi YUTAKI S COMBI Serie Manuel D'utilisation page 39

COMMISSIONING
!
C A U T I O N
• 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.
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 pockets in the installation.
A menu with specific function for commissioning appears by
pressing the menu+back buttons for 3 seconds at the installer
menu (OK+back buttons).
This menu shows the following test to be launched:
• Unit Test Run
• Air Purge
• Screed Drying
After "Test Run" or "Air Purge" option is selected, the YUTAKI
user controller asks for the duration of the test.
In case of test run, user can also select the mode of the test
(cooling or heating).
29 PMML0338B rev.1 - 03/2016
OK
?
N O T E
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.
!
C A U T I O N
It is recommended start the unit (first power ON) with heater forced OFF
and compressor forced OFF (See
switches"). In order to circulate water by water pump and remove possible
air into the heater (Check heater completely filled).
When user confirms the test run or the air purge, the YUTAKI
user controller sends the order to the indoor.
During the execution of this test, the following screen is shown:
• When the test starts, the user controller will exit from the
installer mode.
• If "favourite action button" is pressed during test run, this
function will be executed until the user presses the cancel
option (this is not-limited by time).
• User can cancel the test run regardless of the time left for
test finishing.
• The Test Run icon is shown in the notifications zone, but the
notification of this test run is taken from H-LINK.
When test run has finished, an information message is displayed
in the screen, and pressing accept, the user returns to the global
view.
?
N O T E
• When commissioning and installing the unit, it is very important to use
the "Air purge" function to remove all the air in the water circuit. When
the air purge function is running, the water pump starts the automatic
air venting routine which consists of regulating the speed and open/
close configured 3-way valve to help to evacuate air from the system.
• For Outdoor test run, refer to Outdoor Unit Installation Manual.
• Disable Heater and Boiler operation for all the test run operation.
"5.6 Setting of DIP switches and RSW