Before Operation; Preliminary Check; Checking The Unit - Hitachi YUTAKI S80 R410A Series Installation And Operation Manual

8.1

Before operation

!
CAUTION
• Supply electrical power to the system for approximately 12 hours before start-up after a long
shut-off. 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 shut-off longer than approximately 3 months, it is
recommended that the system be checked by your service contractor.
• 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.
8.2

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.

NOTE
For the commissioning of the outdoor unit please refer to the outdoor unit installation and
operation manual.
8.2.1 Checking the unit
• Check external appearance of the unit to look for any damage due to transportation or
installation.
• Check that all the covers are totally closed.
• Check that the recommended service space is respected (see
Indoor unit Instruction manual and the outdoor unit Installation and operation manual).
• Check that the unit has been correctly installed onto the wall.
PMEN0648 rev.0 - 03/2023
Service space chapter in the
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