Hitachi YUTAMPO Serie Installations- Und Betriebshandbuch Seite 17

COMMISSIONING
7 COMMISSIONING
7.1 PRELIMINARY CHECK
Once the installation has been completed, commissioning
must be performed according to the following procedure before
handing the system over to the customer. Commissioning must
be performed methodically, checking that electrical wiring and
piping are correctly connected.
Indoor and outdoor units must be configured by the installer to
achieve optimal system performance with the most appropriate
settings.
7.1.1 Checking the unit
• Check the external appearance of the unit to look for any
damage that might have been caused during installation.
• Check that all the covers are fully closed.
• Check that the unit has been correctly installed and that the
mounting feet are correctly adjusted.
7.1.2 Electrical checking
!
C A U T I O N
Do not operate the system until all the check points have been cleared:
• Check to ensure that the electrical resistance is more than 1 MΩ, by
measuring the resistance between ground and the electrical parts
terminal. If the measured resistance value is lower than that, do not
operate the system until the electrical leakage is found and repaired.
Do not apply voltage on the terminals for transmission and sensors .
• Check that the power supply voltage is within ±10% of the rated
voltage.
• Check that field-supplied electrical components (main switches,
breakers, wires, conduit connectors and wire terminals) have been
properly selected according to the electrical specifications given in this
document, and check that the components comply with international
and domestic standards.
• Wait for at least three minutes after having turned the main switch OFF
before touching any electrical components.
• Check to ensure that the electrical wiring of the indoor unit and the
outdoor unit are connected as shown in the chapter.
• Check to ensure that the external wiring is correctly fixed, to prevent
problems such as abnormal vibration and noise, or damage to wiring
due to contact with the plates.
7.2 COMMISSIONING PROCEDURE
This procedure applies regardless of the options installed on the module.
• When installation is complete and all necessary settings have been performed, close the electrical box and place the cabinet as
shown in the manual.
• Start up the setup wizard from the unit controller.
• Select the "Domestic hot water temperature" settings.
• Start the unit by pressing the Run/Stop button.
8 OPERATION
The time required to reach the set water temperature depends on factors such as the temperature of water supply, the temperature
inside the tank or the outdoor air temperature.
The electric heater is automatically set to hote in case that heating up the water would take more than eight hours due to low water
and outdoor air temperatures.
11 PMML0451 rev.2 - 03/2018
7.1.3 Checking the hydraulic circuit (DHW)
• Check that the circuit has been properly flushed and filled
with water and that the installation has been drained.
• The pressure of the DHW circuit in the tank has to be lower
than 7 bars.
• Check for any leakage in the water cycle. Pay special
attention to the water piping, heater and anode connections.
• Make sure that the internal water volume of the DHW tank is
correct.
• Check that the valves of the hydraulic circuit are fully open.
7.1.4 Checking the refrigerant circuit
• Check to ensure that the stop valves on the gas and liquid
lines are fully open.
• Check that the size of the piping and the refrigerant charge
comply with the applicable recommendations.
• Check the inside of the unit for refrigerant leakage. Contact
your dealer in case that there is a refrigerant leakage.