Ammonia as the refrigerant refrigeration system of cold storage should be built in the surrounding population density is small. In the refrigeration machine room outside the door for easy operation, should be set to cut off the power supply of the refrigeration compressor switch, this switch should be able to stop all the refrigeration compressor operation, and should be set up with the relevant signs. If the machine control panel is set up in the general control room, additional push-button switches should be installed next to each refrigeration compressor. The machine room of ammonia refrigeration system should be equipped with accidental exhaust device; the accidental exhaust fan should adopt explosion-proof motor, and when the refrigeration system is cut off from the power supply in case of accident, it should be able to ensure reliable power supply of the accidental exhaust fan. Accident exhaust fan overload protection is appropriate to act on the signal alarm system and not directly stop the exhaust fan. Accident exhaust fan control button box should be in the ammonia compressor room door on the outside of the wall concealed. Located in the outdoor condenser, oil separator and other equipment, there should be a fence, prohibit non-operators to enter, and set up signs. High-pressure reservoir located outdoors, there should be a sunshade.
The cold storage shall be equipped with variable power distribution room, and should be as close as possible to the compressor room. Ammonia compressor room, high and low voltage distribution room shall be arranged emergency lighting, lighting duration should not be less than 30 minutes. Room lighting fixtures use explosion-proof lamps, illumination should be 50-70Lx. ammonia compressor room should be installed ammonia concentration automatic measuring device, when the ammonia concentration is close to the lower limit of 10% of the explosion, should be able to send an alarm signal. Ammonia compressor room should be set up in the control room on the side of the machine room, starting and normal operation will produce sparks in the power equipment start-up control equipment, warehouse temperature telemetry, recording instruments should be arranged in the control room. Each refrigeration compressor, pumps, cooling towers and other equipment motor should be equipped with an ammeter; the same air cooler, evaporative condenser, etc. installed several motors can be *** with a piece of ammeter, *** with a group of control appliances and short-circuit protection appliances, but each motor should be set up separately for overload protection.
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