Hitachi airCloud HC-IOTGW Installation & Maintenance Manual page 6

* Where harmful gases can be generated from decomposition.
● Before performing any brazing work, be sure that there are no flammable materials or open
flames nearby.
● Perform a test run to ensure normal operation. During the test run, keep fingers and clothing
away from the device.
● Clean up the site when finished, remembering to check that no metal scraps or bits of wiring
have been left behind inside the unit being installed. After installation work for the system has
been completed, explain the "Safety Precautions", the proper use and maintenance of the
unit to the customer according to the information in all manuals that came with the system. All
manuals and warranty information must be given to the user.
Electrical Precautions
Take the following precautions to reduce the risk of electric shock, fire or
WARNING
!
explosion resulting in serious injury or death.
● Highly dangerous electrical voltages are used in this system. Carefully refer to the wiring
diagram and these instructions when wiring. Improper connections and inadequate grounding
can cause serious injury or death.
● Before servicing, open and tag all disconnect switches. Never assume that electrical power is
disconnected. Check with meter and equipment.
● Only use electrical protection equipment and tools suited for this installation.
● Use specified cables between units. Use wiring and cables insulated with PVC, TFE, PTFE,
FEP, polychloroprene or polymide.
● Communication cabling shall be a minimum of 18-Gauge, two-Conductor, Stranded Copper.
Shielded cable must be considered for applications and routing in areas of high EMI and other
sources of potentially excessive electrical noise to reduce the potential for communication
errors. When shielded cabling is applied, proper bonding and termination of the cable shield
is required. Plenum and riser ratings for communication cables must be considered per
application and local code requirements.
● Be sure to install circuit breakers (ground fault interrupter, isolating switch, molded case circuit
breaker and so on), with the specified capacity. Ensure that the wiring terminals are tightened
securely to recommended torque specifications.
● Clamp electrical wires securely with a cable clamp after all wiring is connected to the terminal
block. In addition, run wires securely through the wiring access channel.
● When installing the power lines, do not apply tension to the cables. Secure the suspended
cables at regular intervals, but not too tightly.
● Make sure that the terminals do not come into contact with the surface of the electrical box. If
the terminals are too close to the surface, it may lead to failures at the terminal connection.
● Turn OFF and disconnect the unit from the power source when handling the service
connector. Do not open the cover without turning OFF the main power supply.
● Disconnect the power source completely before attempting any maintenance for electrical
parts. Check to ensure that no residual voltage is present after disconnecting the power
source.
● Do not clean with, or pour water into the unit as it could cause electric shock and/or damage
the unit. Do not use strong detergent such as a solvent. Clean with a soft cloth.
● Check that the ground cable is securely connected. Do not connect ground wiring to gas
piping, water piping, lighting conductor, or telephone ground cables.
● If there are frequent occurrences with blown fuses or flipped circuit breakers, shut down the
system immediately and contact your service contractor.
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