![]() ![]() Contact Form Dehydration Process during Ammonia Chiller Repair These readings were witnessed by the customer and recorded on the Pressure Test Certificate which was then filed by the Facilities Manager. Having closed all of the service ports, the entire system was pressure tested, noting the start and the finish readings. Spares are kept on site in the stores- so the oil filter was swapped out. Our Engineer used his socket set to remove the filter housing, then he slid out the oil filter. The oil filter which is fitted to the oil pipe on the compressor was blocked due to the moisture reacting with the ammonia refrigerant and turning into ammonium hydroxide. Then, the bolts were ‘torqued up’ to the correct value according to standard industry guidelines. The end plate was lifted into place and the bolts were fitted. The rebuild was the reverse of the strip down: the plates were collected from the plant room and replaced on the evaporator using the new gaskets. Then, we sent them to site for the rebuild. We made the gasket set in our workshop from raw materials suitable for ammonia. Evaporator Rebuild during Ammonia Chiller Repair The gaskets were found to have deteriorated over time- causing the leak. Then, they were taken to the plant room for storage until the rebuild. The plates were found to be in good condition, so they were cleaned using our plate cleaning agent. Having done this, the plates and gaskets were removed and then inspected. The end plate was unbolted from the rest of the evaporator according to standard industry guidelines. This had not made any difference to how fast the leak was occurring.Įvaporator Strip Down during Ammonia Chiller Repair An attempt had been made to ‘nip’ the evaporator up by tightening the end plate bolts. The leak had been identified as coming from in between the plates along the side of the evaporator. The evaporator on this chiller is a plate heat exchanger. They then opened all of the service valves around the chiller. First, the refrigerant hoses were removed from the pump out unit. They both donned their breathing apparatus and full ammonia resistant PPE. Our engineers then decided to break into the refrigerant system. Therefore, it was drained from the various service ports into drums and then taken away for recycling. The oil used to lubricate the compressor is located in the: ![]() By this time, the refrigerant temperature had risen to near ambient temperature. Then, the vapour was removed until the pressure was zero barg. The refrigerant recovery operation was started by removing the ammonia liquid. Having done this, the recovery unit was plugged in and tested. These in place, the extension lead was run out from the adjacent plant room. The plant is located on a roof, so the pump out unit and recovery cylinders were lifted into place with a block and tackle. This was to stop any further leaking of water into the refrigerant system. The water Inlet and Outlet to the plate evaporator had been valved off and then it had been drained down. The chiller has suction-gas cooled, hermetic, scroll compressors.An ammonia chiller had been found to need an evaporator repair on a previous call out. Units are designed in accordance with NFPA 70 (National Electric Code),ASHRAE/ANSI 15 Safety code for mechanical refrigeration,ASME, Listed and labeled with Intertek Testing Services (ETL) and rated in accordance with ARI Standard 550/590-2003. Corrosion resistant wire mesh panels are added to protect the condenser coil from incidental damage and restrict unauthorized access to internal components. The unit structure is heavy-gauge, galvanized steel.This galvanized steel is coated with baked-on powder paint, which, when subjected to ASTM B117 1000 hour, salt spray testing, yields a minimum ASTM 1654 rating of “6”. After assembly, a complete operational test is performed with water flowing through the cooler to assure that the refrigeration circuit operates correctly. The unit is pressure-tested, evacuated, and fully charged with Refrigerant-22 (HCFC-22) and includes an initial oil charge. The 47 - 60 Ton (165 - 210 kW) YCAL models are shipped complete from the factory ready for installation and use. Power Wiring.Ĭontrol Wiring.Īpplication Data. Isolator Details (cont'd).Įlectrical Data.Įlectrical Data - 60Hz.Įlectrical Data - 50Hz. Sound Data.ĭimensions - YCAL0041 (English).ĭimensions - YCAL0045 (English).ĭimensions - YCAL0051 (English).ĭimensions - YCAL0055EC - (English).ĭimensions - YCAL0061 (English).ĭimensions - YCAL0065 (English).ĭimensions - YCAL0041 (SI). Part Load Ratings - R-22 (English Units). Ratings - R-22 (50Hz - English Units) - Cont. ![]() Ratings - R-22 (60Hz - English Units) - Cont. ![]() Ratings - R-22 (50Hz - English Units) - Cont.Ratings - R-22 (60Hz - English Units) - Cont. ![]()
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