Must be strictly adhered toLow temperature refrigeration cycle pumpThe startup sequence of the group is: cooling tower fan on ->cooling water pump on ->cold water pump on ->high and low temperature refrigeration cycle pump group on. The shutdown sequence of the high and low temperature refrigeration cycle pump group is: high and low temperature refrigeration cycle pump group shutdown ->cooling tower fan shutdown ->cooling water pump shutdown ->cold water pump shutdown. When the Wuxi Guanya high and low temperature refrigeration cycle pump is shut down, the high and low temperature refrigeration cycle pump unit should be shut down half an hour before the end of work, and the cold water pump should be shut down after the end of work, which is beneficial for saving energy, avoiding downtime due to faults, and protecting the unit. Before running the high and low temperature refrigeration cycle pump refrigeration cycle, it should be confirmed that all heating cycle pipeline valves have been closed.
Only by correctly starting and stopping the high and low temperature refrigeration cycle pump units can the main unit of the high and low temperature refrigeration cycle pump be guaranteed to operate normally after starting. Pay attention to the good heat dissipation of the condenser, otherwise it may cause the high-pressure protection device of the high and low temperature refrigeration cycle pump group to stop due to the high cold condensation temperature and corresponding condensation pressure, and even lead to malfunction. The cold water in the evaporator should circulate, otherwise it may cause the cold water temperature protection device to stop due to low temperature, or the low pressure protection device of the high and low temperature refrigeration cycle pump set to stop due to low evaporation temperature and corresponding evaporation pressure, and even cause the cold water in the evaporator to freeze and damage the equipment.
The maintenance of low-temperature coolant circulation pump is divided into two types: daily maintenance and regular maintenance
Daily maintenance: Check the equipment every two hours
1. Check for abnormal noise and vibration in the temperature and operation of the water pump and motor bearings;
2. Is the pressure gauge reading normal;
3. Check for any abnormal noise, jumping, or oil leakage in the coupling;
4. Whether the valve switch position is normal;
5. Eliminate abnormal water leakage phenomena;
6. Clean the exterior of the pump unit and the environment of the machine room every week;
Regular maintenance:
1. Check the wear of moving parts such as water pumps, motor bearings, and shaft sleeves monthly and annually. If the wear is severe, they should be replaced in a timely manner;
2. Check the sealing condition of the sealing components and replace the parts with poor sealing effect in a timely manner;
3. Check whether the anchor bolts and main connecting bolts are loose;
4. Check the motor and water pump casing
5. Check if the pressure gauge is working properly
6. Check whether the piping system is leaking, whether each valve is working properly, and the reliability of the circuit operation.