THE 4-WAY CYCLE INVERSION VALVE

A vast number of heat pumps have been installed everywhere since the first oil crisis of 1973. Most of these heat pumps are fitted with a 4- way cycle inversion valve used either to change the pumps to summer mode (cooling) or to defrost the external unit in winter mode (heating). (Article continuation)

Press article published in 1st issue of CCN Magazine

CAPILLARY TUBE EXPANSION: MAINTENANCE PRECAUTIONS

Of all the expansion devices in use, the capillary is certainly the simplest. It consists of nothing more than a simple length of refrigeration tubing of small diameter, which results in a very low cost. In addition, there are no mechanical components, and no adjustment is required. This produces excellent reliability and long term performance.
(Article continuation)

Press article published in 2nd issue of CCN Magazine

THE CAPILLARY TUBE EXPANSION DEVICE : Part 2

As we started in the last issue, the first danger is associated with an approximate charge. The superheat depends on the temperature of the air at the evaporator inlet.

To enable us to better understand of the next problem, let's examine the arrangement below (Article continuation)