A-30
Water Heat Exchanger Unit
7. Electrical installation
(3) Precautions regarding electrical work
Read these important precautions regarding safety carefully, and be sure to observe them.
The precautions shown here are classifi ed into “
!
Warning” and “
!
Caution.” However, they are all
important items regarding safety, and must be observed.
The following shows the symbols used and their meanings.
Warning:
!
Indicates a potentially hazardous situation in which incorrect handling may result in the
death or serious injury of personnel.
Caution:
!
Indicates a potentially hazardous situation in which incorrect handling may result in the
injury of personnel or damage to property.
(1) Safety precautions
!
Warning
Electrical work should be entrusted to the dealer where this product was purchased, or a professional
contractor. Problems due to incorrectly carrying out the work yourself may result in leaking refrigerant,
electric shock, fi re, etc.
The electrical work should be carried out by a properly qualifi ed electrician in accordance with “Technical
Criteria for Electrical Equipment,” “Electrical Wiring Regulations (chiller),” and “Procedures and Technical
Points for Electrical Wiring Work.” Incorrect wiring work may result in an electric shock or fi re.
(2) Electrical wiring work precautions
!
Warning
Use a dedicated branch circuit for the electrical cables, and do not share it with other equipment. Otherwise,
secondary damage may occur as a result of the circuit breaker tripping.
When carrying out wiring work, use the designated cables (type and thickness) and connect them securely.
Fix the cables properly in place to ensure that external force from the cables does not transmit to the
connection terminals. Not connecting the cables securely or not fi xing them in place properly may result
in the generation of heat, fi re, etc.
!
Caution
Attach an overcurrent circuit breaker of the set capacity to each unit. Installing an inappropriate overcurrent
circuit breaker may result in a fi re due to heat generation, short circuit, etc.
Attach an earth leakage breaker of the set capacity to each unit. Not installing an earth leakage breaker
(earth leakage breaker rating of 30 mA within 0.1 sec) may result in an electric shock or fi re.
For the ground connection, install a D type connection in accordance with the Technical Criteria for
Electrical Equipment (formerly type 3 ground connection).
Do not connect the ground cable to a gas pipe, water pipe, lightning conductor, or telephone ground
cable. Inadequate grounding may result in an electric shock.
An inverter is used in the unit, so use an earth leakage breaker that is compliant with the inverter.
Use the clamper for cables in the outdoor unit to fi x the power supply cable and the operation cable for the outdoor
and water heat exchanger units to ensure they do not come into contact with parts such as the following.
Refrigerant pipe, thin pipe for pressure outlet, or any other part of the refrigerant circuit
Sharp edges of attachments and other objects
For the operation cables (remote control cable, operation cable for the indoor, outdoor and water heat exchanger
units), use signal cables that are easy to differentiate from the power supply cable (AC200-240V). Also, do not
run the power cable with the operation cables.
Keep the power supply cable and operation cables of the unit 3 m or more away from the chiller, antenna cable,
operation cable, power supply cable, and other parts of equipment such as a TV, radio, stereo, interphone,
personal computer, word processor, and telephone. Noise from such equipment may have adverse effects.
GHP Chiller TECHNICAL DATA.indb A-30
GHP Chiller TECHNICAL DATA.indb A-30
2012/04/06 13:42:07
2012/04/06 13:42:07
