screw-type refrigeration units mainly include: surface water sources: river water source heat pumps, lake water source heat pumps, seawater source heat pumps; groundwater sources: single well source heat pumps, alternating pumping irrigation source heat pumps, middle ground heat well source heat pumps; types: middle water source heat pumps, wastewater source heat pumps. Water source heat pumps are generally divided into three parts: terminal, machine room, and outdoor energy lifting system. The maintenance of water source heat pumps mainly includes: 1. Outdoor well maintenance, which mainly involves cleaning and maintenance of the water source well, with video detection; the cleaning of single well source heat pumps is characterized by a single well completing water extraction and irrigation, with fewer water source wells, less land occupied, and lower investment. 2. Water source heat pump machine room maintenance: cleaning includes cleaning the condenser, evaporator, and vortex sand separator of the water source heat pump, and the main replacements are: replacing compressor oil and the unit filter element; operation and detection of ground source heat pump units.
Screw-type refrigeration systems are made with semi-hermetic compressors.
The screw-type refrigeration unit is primarily equipped with a semi-hermetic compressor, which not only enhances the efficiency of the compressor's operation but also prevents leakage issues when starting the compressor. This reduces service costs for refrigerant replenishment and shaft seal replacement, and improves the product's reliability for continuous operation year-round and ease of operation.
Selecting Siemens industrial-grade PLC controllers with a liquid crystal touch screen for full active operation, featuring functions such as active/magnetic control, parameter setting and calibration, data recording, fault alarms and recording, and cumulative operating time recording. It can be fully automated without the need for dedicated personnel: Large capacity units use semi-hermetic screw compressors with economizers for operation, improving efficiency. Additionally, low-temperature grade anti-corrosion evaporators and condensers can be equipped with imported brand heat exchangers.
The cause of low pressure in a screw chiller
Refrigerant deficiency or leakage. If there is a refrigerant deficiency but only partial leakage, the balance pressure may be high during shutdown, while the suction pressure and exhaust pressure are low after startup, the compressor's working current is smaller, water-source and ground-source heat pump maintenance, the working time is shorter and the low-pressure fault is reported, the computer displays 'LPCURRENT', the LP fault indicator light on the unit's electronic board illuminates, the Tianjin water-source and ground-source heat pump maintenance company, after a few seconds, the computer displays 'LPRESET', Tianjin water-source and ground-source heat pump maintenance and maintenance, the LP fault indicator light on the unit's electronic board turns off.
If most of the refrigerant has leaked, the balance pressure will be very low, and the unit will report a low-pressure fault upon startup. If the suction pressure is below 0.2 MPa, the unit should not be turned on. The computer will display 'LPCURRENT', and the LP fault indicator light on the unit's electronic board will be illuminated. Another possibility is that there is enough refrigerant, but the expansion valve is not fully open or is blocked (or the refrigerant pipeline is not clear), which may also cause a low-pressure fault.
Water Source Heat Pump Repair - Dongyi Refrigeration Maintenance Co., Ltd. - Tianjin Water Source Heat Pump Repair Company, provided by Tianjin Dongyi Refrigeration Technology Co., Ltd. "Chilled Water Units, Cooling Towers, Central Air Conditioning Fan Coils" Choose Tianjin Dongyi Refrigeration Technology Co., Ltd. The company is located at No. 26, Yangcui Highway, Wuqing District, Tianjin. For many years, Dongyi Refrigeration has been committed to providing excellent service to our customers. Contact: Manager Shen. Welcome to call, write, or visit for business discussions. Dongyi Refrigeration looks forward to becoming your long-term partner! Additionally, we are also a service provider for Tianjin fan coil maintenance, maintenance, and cleaning. Please call for inquiries.
