When we do a good job of cold storage refrigeration system to be complete purge of the system clean-up, strength and tightness test, vacuum test procedures, and all qualified, that is, a cold storage can be added to the ammonia refrigeration system, add ammonia prior to the addition of ammonia valve (or valve regulating stations plus ammonia) on the high-pressure accumulator, and a bottle of ammonia valve ammonia pipe connected ammonia bottle should be placed on the addition of ammonia stents, stent should be high on one side, the side of low, there is a corresponding slope. Ammonia bottle should be placed before weighing record its weight. Ammonia bottle placed head down, ammonia valve valve mouth down, and with the addition of ammonia pipe connected.

Add ammonia should first partial addition of ammonia leak after cold storage operation, the valve slightly open ammonia bottle, open the discharge valve of the cold air in the pipe section to be heard quickly close the exhaust valve to the ammonia odor. If you do not set the exhaust valve, the exhaust slightly loosen the union, then tighten. After phenolphthalein test paper and wet, put the exhaust port (or union) at detecting when paper red indicating that the site has a leak, timely maintenance of cold storage ammonia bottle. To be fully normal, it can open the system to add ammonia valve ammonia. When cold liquid into ammonia refrigeration system pressure of about 0.2MPa, should stop adding ammonia, carry out the system of local irrigation nitrogen leak.

After qualifying as a partial ammonia leak can be cold storage refrigeration system-wide plus ammonia. Before the addition of ammonia to the whole system, you should check the status of open and condenser cooling water system is functioning properly, check the ammonia compressor is normal, the power supply circuit is normal again.

Cold storage project at Riga ammonia with ammonia bottle pressure is higher than the system pressure to the system to automatically into liquid ammonia, refrigerator compressor without starting at the beginning, when the liquid evaporates as ammonia gas, ammonia within their systems gradually increased, gradually increasing the pressure. When the pressure within the system and the ammonia bottle is equal to the remaining liquid ammonia ammonia bottle can not be automatically injected, then close the reservoir of the valve, cold start compressor, the low pressure system pressure to maintain a low pressure to reduce the evaporator the pressure, the system can continue to add ammonia. When cold start compressor, condenser cooling water should ensure that the system is operating normally, when added to the amount of ammonia recorded reaches a predetermined value, and check the fluid reservoir on normal height, add ammonia to complete the work. When the addition of ammonia, in order to test whether liquid nitrogen bottle of ammonia injection is done and the net, you can check the ammonia bottle finish at or near the bottle if there is local frost pipeline. When liquid ammonia frost-free explanation has put the net, you can turn off the ammonia valve ammonia valve on the pipeline systems and processing of ammonia, ammonia replace the bottle, while recording the weight of bottles and new bottles, filled with ammonia in order to calculate the amount of fluid.

When the compressor load in cold storage projects in operation, less liquid ammonia can continue to add nitrogen to the system, depending on the setting of cold storage refrigeration system for debugging and trial production of the work program, we should always do quality inspection of cold storage engineering aspects It checks to ensure the normal operation of cold storage.