Page 13 - Climalife_Contact_15_EN

13 | PROCESS | February 2019 | Climalife contact #15
PROCESS
HRS expertise is recognised in its field
As preventive maintenance of systems is becoming increasingly rare, it is common for HRS to be asked to provide on-site training to equip its customers with good practices in terms of maintaining their installations.
HRS also produces evidence for legal cases where expert assess- ment is needed on a compressor breakage. When required, as many as 20 people can gather around the skeleton of a compressor and its spare parts to establish an accurate diagnosis of the origins of the breakdown.
Electrical incidents: examination of the windings will make it possible to target the origin of the degradation. It can result in localised break- downs, power supply faults on a three-phase motor for example, a total burnout of the coil when the compressor starts, stator overheating due to a lack of charge or short circuits caused by friction of the rotor on the stator.
HRS brings Climalife HQ POE oils to its range
For Marc Beaurain, “choosing a good lubri- cant lies in choosing a trusted supplier, who will select a technology compatible with the refrigerant used, so that the latter can always return the oil to the compressor and regularly balance the housing”. As a reminder, oil has four main functions. In addition to lubricating moving mechanical parts, it contributes to the sealing of the system, it is a driving fluid for some devices and a cooling fluid in the case of screw compressors for example.
As noted earlier, despite oil separation systems, the oil distributed throughout the circuit will tend to log where the circulation speed is low. It will settle on the walls of the exchangers (in particular the evaporators) and reduce their efficiency. If the oil does not return to the
compressor properly, the oil pump may not work and cause the machine to stop. The oil should therefore be selected according to the refrigerant, its miscibility and solubility with the refrigerant, operating temperatures, and type and technology of the compressor.
HRS works mainly on semi-hermetic or screw compressors with an average power of 50 kW, mainly operating with HFC and HFO blends.
It rebuilds up to 1600 compressors each year. HRS has particularly selected the range of HQ POE oils; high quality POE synthetic oils from Climalife.
The company also recommends preventive maintenance of systems and regular maintenance before cold weather to prevent breakdowns and potential system failures. Marc Beaurain says “that simple analysis of the oil can be enough to detect a potential risk for the system in place”. An acidity test such as Climalife’s Acitest Unipro can indicate in seconds whether the acidity of the oil is good, borderline or bad for the system.
HRS, an environmental choice
Choosing to use a rebuilt compressor means choosing a fast service at a reduced price with a longer warranty period. But it’s also an environmental choice! 80% of the parts of a compressor are reused during reconstruction, giving two or sometimes three new leases of life to a compressor.