Safety requirements of fan coil shall be in accordance with zbj72-018.

The connection of the fan coil electrical circuit shall be neat and firm, and the holes and plugs for the wires shall be insulated by insulated pipes or other appropriate protective measures.

3 fan coil in room temperature, often wet condition, the 500 v insulation resistance meter is used to test fan plate of its charge and the charged metal part between the insulation resistance and continuous operation of the condensate conditions as stipulated in the table 6 after 4 h, 500 v insulation resistance meter is used to test fan set its charge and the charged part and not charged insulation resistance between metal parts inspection, the cold and hot state of insulation resistance shall be not less than 2 m Ω.

When the electrical strength of the fan coil is placed in the "on" position according to each speed range of the fan coil, the rated frequency ac voltage of 1500V shall be applied between the live part and the non-live metal part. The starting voltage shall be no more than half of the specified value, and then rapidly rise to the full value for 1min. In mass production, 1800V voltage and 1s time can be used instead.

After the fan coil is operated continuously for 4h according to the specified condensate test condition, the temperature rise of the motor winding is measured by the resistance method immediately. Temperature rise shall be calculated according to GBA755.

6 the fan coil shall operate continuously for 4h according to the specified condensate test condition and the wiring shown in FIG.5, and 110% of the rated voltage shall be applied to measure the leakage current between the exposed metal part of the fan coil and the power line, and the leakage current between the exposed metal part and the power line shall not be greater than 1.5ma.