1 - Hitachi Air Conditioning Products

SAFETY PRECAUTIONTo learn how to used the sanitary hot water heat pump correctly and prevent personal injury and damage toproperty, the user must read through the “Safety Precautions” before operating the sanitary hot water heat pump.Pay special attention to instructions preceded by the WARNING and CAUTION symbols.■ Precautions in this manualThis manual uses the following signal words and symbols, which are categorized according to the degree of injuryor damage that could occur from incorrect use when signal words or instructions are ignored.ENGLISHWARNINGCAUTIONType and Degree of Injury and DamageThis symbol indicates a potentiallyhazardous situation, which if not avoided,could result in death or serious injury.This symbol indicates a potentiallyhazardous situation, which if not avoided,may result in minor injury (or propertydamage).Pictorial ExamplesMake sure to connect earth lineIndicates a prohibited actionIndicates a mandatory action■ After reading the precautions, store the operation manual in a location where it can be easily accessed by anyoneusing the unit.PRECAUTIONS DURING INSTALLATION● Installation of the unit must be performed by the sales agent or otherauthorized personnelInstallation by the user could lead to water leakage, electric shock hazardsor fire.WARNINGCAUTION● Connect the unit to ground● Have your sales agent or other authorized personnel connect the unitto groundGround connections must not be made to gas pipes, water pipes, lightningrods or telephone ground connections.An improperly made ground connection may cause damage or short-circuitsthat could result in electrical shock and fire.● Do not modify the unitModifications could lead to water leakage, breakdowns, electrical shocks andfire.● Install an earth leakage circuit breakerFailure to install an earth leakage circuit breaker may lead to an electricshock hazard.● Install a pressure-relief valveFailure to install a pressure-relief valve may lead to tank damage.● Provide proper drainage of water resulting from dehumidificationDrainage problems could cause water to drip from the outside unit and ontofurniture.● Supply the unit with tap water (French hardness (Th) 15 to 20°F, PH7)Do not use well water, water from a hot spring or ion exchanged water.If the hardness of the water exceeds (TH) 25°F, install a demineralizer tolower hardness to 15 – 20°F.● Do not connect the unit to other than specified power sourceConnecting the unit to an unspecified power source may cause overheatingand fire.– 3 –TAW-270NH2(1).indd 36/3/10 10:29 AM