Hitachi airCore 700 Installation & Maintenance Manual page 7

Electrical Precautions
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All electrical work must be undertaken by a suitably qualified electrician.
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Follow the local codes and regulations, and this manual when performing electrical wiring. Please also
ensure to utilize specified circuit. Circuit capacity shortage and improper wiring may cause electric
shock and/or fire.
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Utilize specified cable for wiring power, air conditioners, damper motors, remote sensors, Wired Remote
Controller, Thermostat and/or other external devices. Other cables may cause electric shock and/or fire.
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Before removing the cover of the Zone Interface Box, turn off the power supply to avoid accidental
electrical shocks.
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Only use electrical protection equipment and tools suited for this installation.
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Insulate the Wired Remote Controller and Thermostat against moisture and temperature extremes.
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Use specified cables between controller and other products.
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Communication cabling must be a minimum of 18-Gauge, 2-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 as per Johnson
Controls-Hitachi Air Conditioning guidelines. Plenum and riser ratings for communication cables must
be considered per application and local code requirements.
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The polarity of the input terminals is important, so be sure to match the polarity when using contacts
that have polarity.
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Highly dangerous electrical voltages may be used in this Zoning Kit. Carefully refer to the wiring
diagram and these instructions when wiring. Improper connections and inadequate grounding can
cause serious injury or death.
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Before installing the Zoning Kit or remote devices, ensure that the indoor and outdoor unit operation
has been stopped. Further, be sure to wait at least five minutes before turning off the main power
switch to the indoor or outdoor units. Otherwise, water leakage or electrical breakdown may result.
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Do not open the service cover or access panel to the indoor or outdoor units without turning OFF the
main power supply. Before connecting or servicing the Zoning Kit or cables to indoor or outdoor units,
open and tag all disconnect switches. Never assume electrical power is disconnected. Verify with a
meter and equipment.
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Use an exclusive power supply at the controller's rated voltage.
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Be sure to install circuit breakers (earth leakage breakers, isolating switch, molded case circuit breaker,
and so forth) with the specified capacity. Ensure that the wiring terminals are tightened securely to
recommended torque specifications.
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Clamp electrical wires securely with cable ties after all wiring is connected to the terminal block. In
addition, run wires securely through the wiring access channel.
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When installing the power lines, do not apply tension to the cables. Secure the suspended cables at
regular intervals, but not too tightly.
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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.
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Do not pour water on the controller 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.
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Check that the ground wire is securely connected. Do not connect ground wiring to gas piping, water
piping, lighting conductor, or telephone ground wiring.Only use electrical protection equipment and
tools suited for this installation.
Take the following precautions to reduce the risk of electric shock, fire, or
explosion resulting in serious injury or death:
INSTALLATION & MAINTENANCE MANUAL
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