Installation and operation manual
2
EWWD440~850AAYNNO**
Packaged water-cooled water chillers
4PW25558-1B
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Use the prescribed cable for wiring, and make sure that
connections are secure.
Be sure to securely fasten cables to their terminals so
that external force on cables has no effect on terminal
connections. Incomplete connection or fixing can lead to heat
generation or fire.
CAUTION
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Do not install the unit in a place which could be
exposed to leaking of flammable gas.
If gas were to leak and collect around the unit, the gas
could be ignited by the unit.
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Be sure to install an electrical leakage breaker.
The electrical leakage breaker should conform to
technical standards for electrical equipment and indoor
wiring regulations. Failure to install an electrical leakage breaker
could result in electrical shock.
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Be sure to provide proper drainage.
Failure to provide proper drainage could result in water
leaking inside and could wet other equipment,
furniture, etc.
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Apply water-proof to the floor surface where the unit is
to be installed.
Poor water-proof could cause other facility/device to
get wet.
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Use chilled (hot) water and condenser water that
conforms to the water quality specifications.
Poor quality water could result in water leaks.
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Do not attempt to run the compressor by pushing the
magnetic contactor with your finger.
Doing so could result in electrical shock or fire.
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Do not mistake the types of refrigerant and lubrication
oil.
Doing so could result in fire or explosion.
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Provide proper grounding for the unit.
Do not connect the ground wire to gas piping, water
piping, lightning rods or telephone ground wire.
Improper grounding could result in electrical shock.
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Be sure to provide each unit with a circuit breaker.
Using a single circuit breaker for more than one unit
could result in electrical shock or fire.
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Do not run power supply wiring between units.
Doing so could result in fire.
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Do not expose the unit to humid environments.
The unit should not be installed near hot water springs,
or near the seashore, nor in areas exposed to oil or
corrosive gas atmospheres such as ammonia.
Corrosion caused by such elements can result in electrical
shock or fire.
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Be sure to dispose of cleansing solutions as stipulated
by law.
Illegal disposal is not only against the law, but can
harm health and the environment.
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Do not apply any machining to the unit main body, or
do not fit by welding.
Doing so could result in the poor air-tightness and
could result in a lack of oxygen in the latter case.
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Make sure there is enough service space.
If the space is not enough, maintenance work cannot
be carried out safely, and could result in any injuries.
Precautions when using
WARNING
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If a malfunction occurs (burning smell, etc.), turn off the
power supply and contact your dealer.
Continuing to operate while the unit is malfunctioning
can result in equipment damage, electrical shock or fire.
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Do not use any heating medium other than water for
chilled (hot) water and condenser water.
Doing so could result in fire or explosion.
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Do not turn the unit ON or OFF with the power supply
switch or circuit breaker, etc.
Doing so could result in electrical shock or fire.
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Take countermeasures against refrigerant leaking.
Take proper countermeasures to prevent refrigerant
leaks from exceeding the concentration limit.
If the concentration limit is exceeded, it could result in a lack of
oxygen.
CAUTION
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Do not use the unit for any purpose other than for
which it is designed.
The unit should not be used for applications such as
preservation of food, plants or animals, high-tech equipment,
art, etc.
Using the unit for such applications could adversely affect the
quality of these goods.
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Do not use fuses other than the ones specified.
Using wire, etc., instead of a fuse could result in
equipment damage or fire.
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Do not attempt to run the compressor by pushing the
magnetic contactor with your finger.
Doing so could result in electrical shock or fire.
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Do not operate the unit with the cabinet or switch box
cover open.
Doing so could result in electrical shock or fire.
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Do not operate the unit with wet hands.
Doing so could result in electrical shock.
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Do not place any inflammable spray nearby. Do not
spray it over the unit.
Doing so could result in fire.
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Do not attempt to force-operate the unit by short
circuiting safety devices.
Doing so could result in fire.
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Observe the specified power supply.
If you use a power supply other than specified on the
machine rating plate, it could result in fire or electrical
shock.
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Do not change settings of safety devices.
Doing so could result in fire, etc.
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Do not place liquid containers such as flower vases on
the unit.
If the liquid spills out, it could get inside the unit and
cause the electrical insulation to deteriorate, resulting in
electrical shock.
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Be sure to stop the unit and turn the power supply off
before cleaning.
Failure to do so could result in injury.
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Do not use chilled (hot) water or condenser water for
drinking or hot water supply.
Doing so could be harmful to health.
■
Do not mistake the types of refrigerant and lubrication
oil.
Doing so could result in fire or explosion.
