For those who are entirely earning from the technical problems of AC, refrigerator and ventilation must have an idea that even during normal servicing of the technician needs to take care of so many things and in such situation gauges act as a life saver for the technicians. From the reading of pressure to liquid everything requires the usage of a gauge. It is true that HVAC has numerous ports and it is quite difficult for a new technician or somebody who is not really familiar with the concept of HVAC to understand the attachments and the complete process flow of refrigeration gauges. Hence this discussion would bring the value addition to the knowledge by guiding the steps in order to setup the HVAC.
Firstly: we need to attach the pressure way of the chilling line with the port colored in red on the gauge which is labeled as red to show the high pressure sign on the gauge. Using the fittings of the flare it is required to attach the coded red hose with the cooling unit of the high pressure port. In order to avoid any mishap one needs to pitch the thread as most the sizes of the ports are different and vary from brand to brand.
Secondly: as the blue labeled port on the gauge is the symbol of low pressure hence the low pressure side must be connected to the same present in the gauge plus the low side of the chilling unit too. The before mentioned connectivity allows the vacuum pressure to show on the system.
Thirdly: now if planning to discharge the unit connects the hose of the waste with the middle of the manifold. This is how to access the recovery compartment of the refrigerator, now attach or connect the meters or any other available hoses and ports to the micron or with the pump directly.
The above mentioned process flow specifically for the refrigerator connections and may vary from the brand to brand specification. Hence it is recommended to understand the brand and the make of the refrigerator. Furthermore, the connection of gauge and pump is quite technical so it is pertinent to not to opt wrong attachments or connections as it may cause severe damage to the product itself. Last but not the least it is highly recommended to check the gauge and test properly before attaching it to any device, as it may give misleading reading or may harm the overall machine badly by providing wrong information. Most of us may think that the measure tools cannot malfunction that is so not true hence the maintenance of the tool itself is very important.