HFC refrigerant prices show further falls European demand for HFC refrigerants has dropped and prices continue to decrease from the highs of 2018, according to a new report. The latest price monitoring report from Öko-Recherche reveals that the demand for HFCs in Q2 of 2019 was lower than in the previous quarter and prices have [...]
In our previous article we discussed the problems associated with not fitting a compressor overload this time we are looking at what can happen when engineers fail to replace the compressor electrics after a compressor failure. It is customary to fit a contactor, with an overload protector, into the electrical control circuit of the compressor, [...]
MACScool has come a long way over the past 15 years, with humble beginnings in the refrigeration wholesale sector. Through persistence and determination our company has since become known as an honest partner in the industry, offering a great range of products and brands. Our relationships with contractors and wholesalers are built on mutual respect and [...]
HVACR service technicians and installers are heroes. They get the office air conditioning back up and running on a sweltering day; they come to the rescue when a cold room breaks down; and they set up local supermarkets with the latest cooling technology, lessening the impact on the environment and saving money on energy costs. [...]
It is important to regularly check-in with your career growth or to set goals that you have to achieve in order to grow your business and skills. With the constant changes in equipment and technology in the HVAC industry, it is vital for HVAC Technicians to do this at least once a year to ensure [...]
Read the Beginners HVAC Tech’s Guide for Understanding Superheat by ACHR News. Superheat is oftentimes the most confusing measurement taken in the field. TRICKY CALCULATION: Superheat is actually the difference between two measurements. And the term “heat” causes confusion, since the value can be negative. Much like subcooling, understanding and calculating superheat can be somewhat [...]
By Professor Dick Powell of Refrigerant Solutions. In both technical and non-technical literature, fluorine-containing (HFC) refrigerants are increasingly referred to as ‘chemical’ or ‘synthetic’ refrigerants in contrast to the so-called ‘natural’ refrigerants. Generally ‘chemical’ is now seen by some as being ‘bad’ and is contrasted with ‘natural’, which implies ‘good’. What’s the difference between chemical [...]
One of the most common and simplest of causes of compressors failure is due to the plant electrics not having a compressor overload fitted. When large Semi-Hermetic or Hermetic Compressors are fitted to systems where the compressor contactor has no overload fitted, the compressor is left wide open to liquid washout, Valve breakages or even [...]
In the last issue we looked at Safety when Brazing. This month, we move onto Adjusting Oxy-Acetylene Flames. NOTE: Adhere to and apply all Safety Precautions! Lighting the Torch Connect the welding equipment and purge all the impure gas. Set the working pressure for the work to be welded. Point the blowpipe (torch) away from any persons [...]
Lack of lubrication can be categorised under two main headings. They are: Lack of lubrication Lack of oil Lack of lubrication: Lack of lubrication is where the oil either cannot lubricate the bearings due to the oil being degraded, or when the lubricant cannot reach the bearings due to blockages or loss of oil. Oil [...]
