screw-type refrigeration units mainly include: Surface Water: River water source heat pumps, Lake water source heat pumps, Sea water source heat pumps; Groundwater: Single well source heat pumps, Alternate pumping irrigation source heat pumps, Intermediate geothermal well source heat pumps; Types: Middle water source heat pumps, Wastewater source heat pumps. Source heat pumps are generally divided into three parts: terminal, machine room, and outdoor energy enhancement system. The maintenance of source heat pumps mainly includes: 1. Outdoor well maintenance, which primarily involves cleaning and maintenance of the water well; video detection for single well source heat pumps; the main feature of cleaning a single well is that it independently completes water extraction and irrigation, with fewer water wells, less land occupation, and lower investment. 2. Source heat pump machine room maintenance: cleaning involves cleaning the condenser, evaporator, cyclone sand separator, etc., and replacements include: replacing compressor oil, unit filter cores; operation and detection of ground source heat pump units.
Screw-type refrigeration units are made with semi-hermetic compressors.
The screw-type refrigeration system is primarily constructed with a semi-closed compressor as the main unit, 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 adding refrigerant and replacing shaft seals, and improves the reliability and ease of operation for continuous, year-round operation of the product.
Selecting Siemens industrial-grade PLC controllers with a liquid crystal touch screen for full automatic operation, featuring active/manual control, parameter setting and calibration, data recording, fault alarm and recording, and cumulative operating time recording functions. 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.
Reason for Low Pressure in 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 short and a low-pressure fault is reported, the computer displays 'LPCURRENT', the LP fault indicator light on the unit's electronic board illuminates, 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 leaks out, the balance pressure will be very low, and the unit will report low pressure upon startup. If the suction pressure is below 0.2 MPa, the unit cannot be started, and the computer will display 'LPCURRENT' with the LP fault indicator light on the unit's electronic board. Another possibility is that there is enough refrigerant, but the expansion valve is too open or blocked (or the refrigerant line is not clear), which may also cause a low-pressure fault.
Water Source Heat Pump Maintenance - Dongyi Refrigeration Maintenance Co., Ltd. Tianjin Water Source Heat Pump Maintenance Company is provided by Tianjin Dongyi Refrigeration Technology Co., Ltd. "Chilled Water Unit, Cooling Tower, Central Air Conditioning Fan Coil" choose Tianjin Dongyi Refrigeration Technology Co., Ltd., located at: No. 26, Yangcui Highway, Wuqing District, Tianjin. For many years, Dongyi Refrigeration has been committed to providing quality service to customers, Contact: Manager Shen. Welcome to call, write, or visit us for business negotiations. Dongyi Refrigeration looks forward to becoming your long-term partner! Meanwhile, we also offer maintenance, maintenance, and cleaning services for Tianjin fan coil, welcome to call for inquiries.
