Commissioning - Hitachi YUTAKI S COMBI Serie Manuel D'utilisation

COMMISSIONING

6.3.6 Levelling procedure
Once the indoor unit connections have finished, adjust the
height of the mounting foot to align perfectly the refrigerant
piping outlet to the installation connection.
?
N O T E
• All the procedure must be done before filling the water tank.
• Adjust only the necessary mounting foot of the unit.
• Start with all four feet screwed in as far as possible (factory supplied
position).
• Two people are necessary for the levelling procedure.
Follow the process:
Turn the mounting foot to extend the height (use the hexagon or
slot designed for this purpose in the shaft end).
!
C A U T I O N
• Take care do not turn the weld nut when turning the mounting foot.
Use an slot with a height profile lower than 5 mm.
• Never work on more than one foot at the same time. When finishing,
all 4 lock-nuts must be tightened firmly.
Hexagon and
slot for help
in the foot
adjustment
process
Threaded
shaft
Weld nut
Foot
7 COMMISSIONING
7.1 BEFORE OPERATION
!
C A U T I O N
• Supply electrical power to the system for approximately 12 hours
before start-up after a long shutdown. Do not start the system
immediately after power supply, it may cause compressor failure
because the compressor is not well-heated.
• When the system is started after a shutdown longer than approximately
3 months, it is recommended that the system be checked by your
service contractor.
7.2 PRELIMINARY CHECK
When installation is complete, perform commissioning according to the following procedure, and hand over the system to the
customer. Perform the commissioning of the units methodically, and check that the electrical wiring and the piping are correctly
connected.
Indoor and outdoor units must be configured by the installer to get the perfect setting and the unit working.
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N O T E
For the commissioning of the outdoor unit please refer to the outdoor unit installation and operation manual.
27 PMML0338B rev.1 - 03/2016

Adjust the
!
foot's height as
needed
(2 options)
Extend
Take in
6.3.7 Test and check
Finally, test and check the following items:
• Water leakage
• Refrigerant leakage
• Electrical connection
• ...
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N O T E
Please refer to the chapters of
filling" and "7 COMMISSIONING"
unit Installation and Operation manual for the specific details about
refrigerant charge tasks.
!
D A N G E R
Do not connect the power supply to the indoor unit prior to filling
the space heating and DHW circuits with water and checking water
pressure and the total absence of any water leakage.
• Turn OFF the main switch when the system is to be stopped for a
long period of time: as the oil heater is always energized even when
the compressor is not working, there will be electricity consumption
unless the main switch is turned OFF.
"4.2.1 Refrigerant charge", "4.3.6 Water
in this document and refer the Outdoor