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NATURAL REFRIGERANT CO HEAT PUMP HIGH TEMPERATURE Operation & Maintenance HOT WATER UNIT 2 Components Check items (criterion) Qualified or not Unit Check whether the surface is rusted or damaged. Compressor Measure whether the insulation resistance is above 5 MΩ. Check whether there is abnormal sound or vibration during operation. Water pump Check whether the surface is rusted or damaged. Fan Measure whether the insulation resistance is above 5 MΩ. Electric two-way valve Check whether there is abnormal sound or water leakage during manual operation. Check whether there is leakage of water or refrigerant. Check whether the surface is rusted or damaged. Check whether it is manually operated. Check whether there is abnormal sound or water leakage during manual operation. Comparison of the stop pressure and saturated pressure of external gas Air cooler PLC Solenoid valve Electric three-way valve Leakage detection Water inlet and outlet resistance Check whether the heat pump surface is rusted, damaged, or smudged. Check whether there is abnormal sound or vibration during operation. Check whether the surface is rusted or damaged. Measure whether the insulation resistance is above 5 MΩ. Check whether there is abnormal sound or vibration during operation. Check whether the surface is rusted or damaged. Check whether the surface is rusted or damaged. Appearance inspection Check whether the surface is damaged. Check whether the surface is damaged. Check whether there is leakage of refrigerant, or whether the fluid on the compressor connector is blistering. Check the change of the water inlet and outlet resistance of the unit to determine whether the unit is seriously scaled. 20 www.tica.proPDF Image | CO2 HEAT PUMP High Temp Hot Water
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