Industrial Refrigeration Oil Service

Industrial Refrigeration Oil Service

Industrial Refrigeration Oil Service

Industrial Refrigeration Oil Service

An industrial refrigeration oil service visit was arranged because of an oil return issue. Several fans had been down on the air cooled chilled water system. This causes the chilled water system to unload so as to prevent a fault occurring. The lower mass flow rate of the refrigerant caused oil to migrate to the low side of the system. Several vessels are available with various forms oil return control. These vessels were valved off. A two man team with the correct ammonia PPE and breathing apparatus carried out the job

Not Enough Oil Recovered During Service to the Industrial Refrigeration Plant

Only some of the oil was recovered using during the industrial refrigeration service of the plant. Therefore, the engineers decided to add new oil to get the chilled water system running. The only problem with doing this is that once running the machine, the oil has to be got back out. Therefore, the industrial refrigeration oil service had to be carried out a second time to resolve the oil return issue

0161 370 7193

service@maximuschillers.com

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Chilled Water System Repair by Fitting Fan Decks

For this chilled water system repair, scaffolding had been erected in accordance with the Risk Assessment. The old fan decks were lifted out by the two man team. A really good team was sent out: one of the men was more technical and the other more mechanical- complementing each other with their different skill sets. The new fans were an updated version and the wiring was different. The fault link had to be adapted but the 0-10v input from the controller was the same. The controller reads the pressure from a transducer, then sends out a voltage which the fan turns into the corresponding speed

Service Testing of the Chilled Water System

The fault link had been correctly modified, so service testing of the chilled water system was carried out. The machine loaded up to 62% and monitoring continued during the rest of the visit

Read More about International Institute of Ammonia Refrigeration Technology and Standards

 


Service to Industrial Refrigeration Controller

Industrial Refrigeration Service Visit

Tick Sheet for the Industrial Refrigeration Service Visit

The industrial refrigeration service visit is carried out inside a walk in room so some of the machine can be serviced in the dry. Good job because it is a bit of a rainy day- don't want to get the tick sheet wet!

Chiller Controller

The controller for the plant has been problematic from when the chiller was first lifted in. It faults out regularly: reoccurring known faults known to the customer. Part of the problem are low load conditions. This causes the chiller to go into various alerts then it eventually trips out

Over Complicated Program for the PLC

Another part of the problem are over complicated controls. I often think about the same machine in a critical process environment. This machine is bespoke so there will be a bog standard version as well. The controls on this version have too many sensors, generating too many faults. There is always something which trips it out when no fault as such is present. The controls themselves are a fault if they are problematic. Factory Managers don't like too many industrial refrigeration service visits because of spurious trip outs- they just want the plant to just run seamlessly. This customer, however, has to pay for more parts and more industrial refrigeration service is to keep it running

0161 370 7193

service@maximuschillers.com

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Trim the Ammonia Refrigerant

The chiller has a low refrigerant charge so an industrial refrigeration service visit has been arranged to trim the ammonia refrigerant. We have state of the art ammonia refrigerant recovery units Read More but these are used when handling tonnes of ammonia refrigerant. This is just a small 200kw industrial refrigeration plant so we will be using a smaller ammonia refrigerant recovery method

Oil Return During the Industrial Refrigeration Service Visit

Low refrigerant charge diagnosed during the industrial refrigeration service visit causing the oil to migrate to the low side of the system. The oil will need to be manually recovered from various vessels following the ammonia oil recovery procedure

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