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Safety Precautions
• The precautions described herein are classified as WARNING and CAUTION. They both contain important
information regarding safety. Be sure to observe all precautions without fail.
• Meaning of WARNING and CAUTION notices
WARNING..............Failure to follow these instructions properly may result in personal injury or loss of life.
CAUTION ...............Failure to observe these instructions properly may result in property damage or personal injury,
which may be serious depending on the circumstances.
• The safety marks shown in this manual have the following meanings:
• After completing installation, conduct a trial operation to check for faults and explain to the customer how to operate the unit and
take care of it with the aid of the operation manual.
Be sure to follow this instructions.
Be sure to establish an earth connection.
Never attempt.
WARNING
• Ask your dealer or qualified personnel to carry out installation work.
Do not attempt to install the unit yourself. Improper installation may result in water leakage, electric shocks or fire.
• Install the unit in accordance with the instructions in this installation manual.
Improper installation may result in water leakage, electric shocks or fire.
• Be sure to use only the specified accessories and parts for installation work.
Failure to use the specified parts may result in the unit falling, water leakage, electric shocks or fire.
• Install the unit on a foundation strong enough to withstand the weight of the unit.
A foundation of insufficient strength may result in the equipment falling and causing injury.
• Electrical work must be performed in accordance with relevant local and national regulations and with instructions
in this installation manual. Be sure to use a dedicated power supply circuit only.
Insufficiency of power circuit capacity and improper workmanship may result in electric shocks or fire.
• Use a cable of suitable length.
Do not use tapped wires or an extension lead, as this may cause overheating, electric shocks or fire.
• Make sure that all wiring is secured, the specified wires are used, and that there is no strain on the terminal
connections or wires.
Improper connections or securing of wires may result in abnormal heat build-up or fire.
• When wiring the power supply and connecting the wiring between the units, position the wires so that the control
box lid can be securely fastened.
Improper positioning of the control box lid may result in electric shocks, fire or over heating terminals.
• When connecting the unit to “HPSU” or a hydro box, be sure to turn off the unit, “HPSU”, and hydro box before
starting work.
This procedure involves connecting high-voltage wires. Performing it while devices are energized may result in electrical shock, fire, injury, or
death.
• Be sure to earth the unit.
Do not earth the unit to a utility pipe, lightning conductor or telephone earth lead. Imperfect earthing may result in electric shocks.
• Be sure to install an earth leakage breaker.
Failure to install an earth leakage breaker may result in electric shocks or fire.
CAUTION
• Do not install the unit at any place where there is a danger of flammable gas leakage.
In the event of a gas leakage, build-up of gas near the unit may cause a fire to break out.
• Do not install the unit in a location where it may come in contact with mineral oil, oil vapour or spray, or
corrosive gas, or where there are machines that generate electromagnetic radiation.
This will cause deterioration of the plastic parts, corrosion of the copper pipes and brazed parts, and malfunctioning of the control system.
• Do not install the unit where the air contains high levels of salt such as air near the ocean and where
voltage fluctuates a lot (e.g. in factories). Also vehicles or vessels.
• Do not install accessories on the casing directly.
Drilling holes in the casing may damage electrical wires and consequently cause fire.
• While following the instructions in this installation manual, install drain piping to ensure proper drainage and
insulate piping to prevent condensation.
Improper drain piping may result in indoor water leakage and property damage.
• Tighten the flare nut according to the specified method such as with a torque wrench.
If the flare nut is too tight, it may crack after prolonged use, causing water leakage.
• Never use water that does not satisfy EU drinking water quality standards. Do not use well water, either.
Otherwise, the tank may be corroded. (Domestic hot water quality must be according to EN directive 98/83 EC.)
• The temperature of the water that flows through the unit must always be maintained between 6°C and 60°C.
• Do not touch the aluminum fin.
Doing so may result in injury.
