Daily start-up of low-temperature chiller units
1. The unit control cabinet provides three pairs of switch output points to control the start and stop of the chilled water pump, cooling water pump and cooling tower. If multiple units are used in parallel, the water volume passing through each unit should be adjusted to confirm that it meets the usage requirements.
2.Check or reset all kinds of setting contents on the display screen of the electrical control cabinet to meet the usage requirements (generally, do not change them; the water-cooled unit has been set to a better state before leaving the factory).
3.After the relay contacts of the chilled water pump, cooling water pump and cooling tower are interlocked with the control cabinet of the unit, the following control logic will be executed: Before starting the unit, start the chilled (medium) water pump first. Two minutes later, start the cooling water pump. One minute later, start the unit. If the water flow switch is detected to be disconnected for 10 consecutive seconds, the machine will stop and report a fault. The start and stop of the cooling tower are controlled according to the set temperature of the cooling water.
4. After the chiller is put into operation, make sure that the compressor has no abnormal vibration or noise. If any abnormality is found, stop the machine immediately for inspection or notify the Haier customer service department. After the chiller is running normally, use a clamp meter to check whether all operating currents meet the design requirements of the chiller.
