Lennox 4 Series Installation Manual page 6

• Ensure a correctly sized power cord is used. Never use a damaged power cord or connection wire.
The connection wire should be replaced by exclusive cable.
• After connecting the power cord, ensure the electric box cover is properly secured to avoid potential
accidents.
• Always comply with the nitrogen charge requirements. Charge nitrogen when welding pipes.
• Never short-circuit or cancel the pressure switch to prevent unit damage.
• Always connect the wired controller prior to supplying power to the unit.
• Prior using the unit, always conduct an inspection to ensure the piping and wiring are connected
correctly to avoid water leakage, refrigerant leakage, electric shock, or fire.
• Never insert fingers or objects into air outlet/inlet grille.
• Open doors and windows to provide good ventilation in the room to avoid oxygen deficit when the
gas/oil supplied heating equipment is used.
• Never start up or shut down the air conditioner by means of directly plug or unplug the power cord.
• Only turn off a unit if it has been running for at least five minutes; otherwise it will influence oil return
of the compressor.
• Do not allow children to operate this unit.
• Do not operate this unit with wet hands.
• Turn off the unit or cut off the power supply before cleaning the unit, otherwise electric shock or
injury may occur.
• Never spray or flush water towards unit, otherwise malfunction or electric shock may occur.
• Do not expose the unit to a moist or corrosive environment.
• Ensure the unit has been powered at least 8 hours before operation. Do not cut off the power when
24 hours short-time halting (to protect the compressor).
• Volatile liquids, such as diluent or gas will damage the unit appearance. Only use soft cloth with a
little neutral detergent to clean the outer casing of the unit.
• Under cooling mode, do not set the room temperature too low and keep the temperature difference
between the indoor and outdoor unit within 5°C.
• If the unit is operating abnormally (e.g. burning smell), power off the unit and cut off the main power
supply. Contact the authorised service centre or dealer.
• Never attempt to fix the unit yourself, as this may result in electric shock, injury or damage to the
unit. Always use an authorised service centre or dealer.
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Outdoor Unit
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