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The influence of walk-in cooler refrigeration compressor (2)
The influence of walk-in cooler refrigeration compressor (2)
(2) Check the compressor.
① Check that there are no obstacles in the compressor and motor operating parts, and turn the pulley or coupling for 2 to 3 revolutions to see if all walk-in cooler control equipment protection devices are in good condition.
② Observe the crankcase pressure. If it exceeds 0.2MPa, lower the pressure first. If this happens frequently, the cause should be identified and eliminated.
③Check the oil level of the crankcase. The normal oil level should be above 2/3 of the lower glass sight hole and below 1/2 of the upper glass sight hole.
④ Check whether the valves of the pressure gauges are open and whether the pressure gauges are sensitive and accurate. Replace the damaged ones.
⑤ Whether the indicator of the energy adjustment device is at the n5
5n position or the position with the least number of cylinders (for compressors equipped with a bypass valve, the bypass valve should be opened).
⑥ Whether the indicated position of the oil three-way valve is in the operation position .
⑦Check whether the starting device of the motor is in the start position.
(3) Check the high and low pressure piping system and equipment, and whether all the valves are in the ready state.
① Check whether the relevant valves are open from the compressor high-pressure discharge pipeline to the condenser, from the condenser to the regulating station. The regulating valve should be closed.
②Check whether the relevant valves from the evaporator to the compressor and the low-pressure suction pipeline are open. The suction valve of the compressor should be closed.
③If the compressor is connected to the intercooler pipeline, its valve must be closed.
④The pressure equalizing valve of the condenser and high pressure accumulator should be opened. The pressure gauge valve and liquid level indicator should be opened slightly.
(4) Check the liquid level of the walk-in cooler reservoir.
①Check the liquid level of the high-pressure reservoir, which should not exceed 80% or less than 30%.
②Check the liquid level of the circulating liquid storage tank or the ammonia separator, and keep it at the height of the float control. When the floating ball fails or there is no floating ball valve, the liquid level should be controlled at a maximum of 60% and a minimum of 20%.
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