1, chiller open, shutdown sequence To ensure the normal operation of air-conditioning host starts, we must ensure that: â‘ condenser cooling well, otherwise it will be due to cold-condensing temperature and the corresponding condensing pressure is too high, the chiller high-pressure protection device action And parking, and even lead to failure. (2) cold water in the evaporator should be circulated, otherwise the temperature of the cold water will be too low, which will cause the cold water temperature protection device to stop and stop, or the evaporation temperature and the corresponding evaporation pressure is too low, it is the low pressure protection device of the chiller running and stopping, Lead to freezing of cold water in the evaporator and damage to the device. Therefore, the chiller start-up sequence: (must be strictly followed) cooling tower fan on -> cooling water pump on -> cold water pump on -> chiller chiller shutdown order: (must be strictly observed) Chiller Stop -> cooling tower fan stop -> cooling water pump stop -> cold water pump stop Note: â‘ shutdown, the chiller should be shut down half an hour before get off work, cold water pump shut down after get off work, is conducive to energy conservation, at the same time Avoid downtime, protect the unit. â‘¡ Before running the refrigeration cycle, make sure the heating cycle valve is closed. 2, chiller operation â‘ Preparation before powering 1) Make sure the unit and controller power is on. 2) Confirm cooling tower fan, cooling water pump and cold water pump are all turned on. 3) Confirm that the end fan coil unit is powered on. â‘¡ Start-up 1) Press the status key on the keyboard and then switch the unit ON / OFF switch below the keyboard to the ON position. 2) The unit will make a self-test. After a few seconds, a compressor will start up and another compressor will start up after the load increases. 3) Once the unit is started, all the operations are not automatic. Unit according to the cold load (chilled water supply and return water temperature) changes automatically start and stop. â‘¢ Normal operation 1) When the unit is running normally, the controller will monitor the hydraulic pressure, motor current and other parameters of the system. If there is any problem, the control system will automatically take corresponding measures to protect the unit and display the fault information on the unit screen . (For details, refer to the Installation, Operation and Maintenance Manual.) 2) During each 24-hour operation period, a dedicated person should permanently record the operation of the unit at fixed intervals. â‘£ Stop 1) As long as the unit below the keyboard ON / OFF toggle switch to the off position, you can make the unit down. 2) To prevent damage, do not disconnect the unit even when the unit is down. 3, fan, pump operation â‘ cooling tower fan, cooling water pump, cold water pump are independent control, power should be confirmed before power normal, non-inverting, lack of phase. â‘¡ Before opening the pump, confirm that the valves in the pipeline are open.
Stainless Steel Railing project
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