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How to deal with the sudden failure to start a 3 ton chiller?

ClassificationIndustry News 17

How to deal with the sudden failure to start a 3 ton chiller?

1. The reason why the 3-ton chiller cannot be started

The main reason why the LC -25°C ~ -5°C Low Temperature Chillers cannot start is that during the operation of the system, the pressure at the inlet of the chiller is low, which cannot meet the basic operating conditions, leading to the problem of not being able to start.

According to the instructions for the configuration of domestic chillers, it can be understood that it is mainly caused by reasons such as idle water pumps. As long as the air in each system of the chiller is released, it can meet the suitable operating environment and achieve the purpose of starting the chiller.

The issue of stress. Remind chiller users that after experiencing varying degrees of startup difficulties, they need to complete the maintenance of the chiller according to their actual needs.

To ensure the smooth operation of the chiller, it is necessary to effectively control the inlet and outlet of the water pump during the use of the chiller. As the air is continuously eliminated, the problem of not being able to start can be perfectly solved.

2. Handling methods for encountering high-voltage faults

Due to insufficient cooling water flow, the rated water flow cannot be reached. The main manifestation is that the pressure difference between the inlet and outlet water of the unit decreases and the temperature difference increases. The reason for insufficient water flow is due to a lack of water or air in the system. The solution is to install an exhaust valve at a high position in the pipeline for exhaust.

If the pipeline filter is blocked or too fine, and the permeability is limited, a suitable filter should be selected and the filter screen should be cleaned regularly; The selection of water pumps is relatively small and not compatible with the system. Excessive refrigerant charge.

This situation usually occurs after maintenance, manifested as high suction and exhaust pressure, balance pressure, and high operating current of the compressor. It should be deflated under rated operating conditions based on suction and exhaust pressure, balance pressure, and operating current until normal, so it is still necessary to regularly check.

Scaling or blockage of the condenser. Condensed water generally uses tap water, which is prone to scaling at temperatures above 30 ℃. Moreover, due to the open cooling tower being directly exposed to the air, dust and foreign objects can easily enter the cooling water system, causing fouling and blockage of the condenser, small heat exchange area, low efficiency, and also affecting water flow.

The performance is that the pressure difference and temperature difference between the inlet and outlet water of the unit increase, and the temperature of the condenser is high both up and down when touched by hand, resulting in a hot copper tube for the condenser outlet. The unit should be regularly backwashed, and if necessary, chemical cleaning and descaling should be carried out. The cooling water temperature is too high and the condensation effect is poor.

The rated working condition of the cooling water required by the chiller is 30-35 ℃, with high water temperature and poor heat dissipation, which inevitably leads to high condensation pressure. This phenomenon often occurs during high temperature seasons.

The reason for the high water temperature may be: a cooling tower malfunction, such as the fan not turning on or even reversing, and the water distributor not rotating, manifested as a high and rapid increase in cooling water temperature; The external temperature is high, the water path is short, and the amount of circulating water is low. In this situation, the temperature of the cooling water is generally maintained at a high level, which can be solved by increasing the storage tank.

A water chiller is completely different from general water cooling equipment because it has a completely independent refrigeration system and is never affected by gas temperature or the environment. The water temperature can be adjusted and controlled within the range of 5-30 ℃, thus achieving the goal of high-precision and high-efficiency temperature control.

The chiller is equipped with an independent water circulation system, and the water inside the chiller can be recycled to save a lot of water. The general water cooling method cannot achieve the goal of high-precision and high-efficiency temperature control, as both natural water and water tower heat dissipation are inevitably affected by natural temperature. The water temperature is low in winter and high in summer.

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