What do you need to know about HVAC pressures?

It’s no secret that HVAC and refrigeration systems are complicated pieces of technology. But with the help of Testo refrigeration gauges and a bit of know-how, it’s easy to have these machines running safely and efficiently.

There are a number of process occurring inside these machines all at once, with temperatures and pressures contributing to their functionality. If either of these functions develop issues, it can compromise the effectiveness of the unit, or create a dangerous work environment.

The following examples outline the potential dangers of incorrect pressure readings, and possible causes for these problems.

What dangers do incorrect pressures pose?

HVAC and refrigeration units are designed with certain operating conditions in mind, and the parts that comprise them will all have a specific set of tolerances to ensure they don’t fail.

While most units will have a cut-off that detects dangerous pressures, these instances still pose a threat to its functionality.

HVAC Web Tech states high pressure within these units could cause the internal cylinder to rupture, rendering it useless. In an extreme case, this can create further problems if the pressure is great enough to release the refrigerant at force.

In these events, the force could cause damage to workers or other machinery if they are near when the incident occurs. The organisation advises that any personnel working with faulty units should be wearing the necessary protective clothing in case high pressures overload them.

How is high pressure caused?

Due to the complicated nature of these units, there are a number of reasons for pressures to become too high or too low. One possible option that is relatively simple to diagnose is an overcharged refrigerant. Put simply, this means there is too much of the respective refrigerant in the system, which normally results in high pressure readings.

The amount of refrigerant in a system greatly affects its potential to function and contribute to low pressure measurements as well. If there is too little refrigerant in the unit, it will result in low pressure, preventing the machine from running at its best.

What will help to keep pressures in check?

The best way to ensure these conditions don’t endanger your HVAC unit is to schedule regular maintenance and ensure it is performed correctly. On top of this, any strange behaviours from the machine should prompt immediate inspection.

Devices like the brand new Testo 550 Refrigeration gauge provide an easy way to inspect pressures in your HVAC and refrigeration equipment, with the digital display feeding accurate information that is right first time, every time.