1. Safety precaution
Installer reference guide / Mono tank integrated type
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• After completing the installation, always carry out a functional test (commissioning, including reporting) and provide
instructions on how to operate the air to water heat pump to the user.
• Do not use the air to water heat pump in environments with hazardous substances or close to equipment that releases
open flames to avoid the occurrence of fires, explosions or injuries.
• While in installation or relocation of the product, do not mix the refrigerant with other gases including air or
unspecified refrigerant. Failure to do so may cause pressure increase resulting in an explosion, rupture or injury.
• Do not cut or burn the refrigerant container or pipings.
• Use clean parts such as the manifold gauge, vacuum pump, and charging hose of the R32 refrigerant.
• Installation must be carried out by qualified persons to handle the refrigerant. Additionally, refer to the regulations
and laws.
• Be careful not to let foreign substances (lubricating oil, refrigerant other than R32, water, etc.) enter the refrigerant circuit.
• When mechanical ventilation is required, ventilation openings shall be kept clear of obstruction.
• For disposal of the product, follow the local laws and regulations.
• Do not work in a confined place.
• The work area shall be blocked.
• The following checks shall be performed for installation:
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The ventilation devices and outlets are operating normally and are not obstructed.
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Markings and signs on the equipment shall be visible and legible.
• Upon leakage of the refrigerant, ventilate the room. When the leaked refrigerant is exposed to a flame or hot source, it
may cause the generation of toxic gases.
• Make sure that the work area is safe from flammable substances.
• To purge air in the refrigerant piping, be sure to use a vacuum pump.
• Note that the refrigerant has no odour.
• The units are not explosion proof so they must be installed with no risk of explosion.
• This product contains fluorinated gases that contribute to global greenhouse effect. Accordingly, do not vent gases
into the atmosphere.
• For installation with handling the refrigerant (R32), use dedicated tools and piping materials.
• Servicing and installation shall be performed as recommended by the manufacturer. In case other skilled persons are
joined for servicing, it shall be carried out under supervision of the person who is competent in handling flammable
refrigerants.
• Safety checks are required to minimize the ignition risk for servicing the units containing flammable refrigerants.
• Servicing shall be performed following the controlled procedure to minimize the risk of flammable refrigerant or gases.
• Do not install the unit where there is a risk of combustible gas leakage.
• Do not place the unit near heat sources.
• Be cautious not to generate a spark as follows:
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Do not remove the fuses with power on.
• After installation, check for leakage. Toxic gas may be generated and if it comes into contact with an ignition source
such as the fan heater, stove, and cooker.
• In order to relocate or service the product, collect the refrigerant in vacuumed recovery cylinders.