Working With an Unknown Refrigerant This can be a difficult, and potentially costly, scenario Joe Marchese July 3, 2020 No Comments When working on a refrigeration system, technicians may occasionally come across one where the type of refrigerant is unknown.Read More
Several Options Available to Connect Copper Tubing Brazed and pressed connections both have advantages and disadvantages Joe Marchese May 26, 2020 No Comments Today, the use of pressed connections for joining both hard drawn and soft copper tubing is gaining popularity for many reasons.Read More
Remaining Productive During Your Downtime Take this opportunity to make sure your tools and truck are in tiptop shape Joe Marchese May 3, 2020 No Comments What can a refrigeration technician do during this downtime? One great option is to take this opportunity to enhance your knowledge of the trade.Read More
Understanding Low-Pressure Controls in Refrigeration Systems When added, they control and protect the compressor Joe Marchese April 10, 2020 No Comments When working on a system, it is important to determine how the low-pressure control is being used and make sure it is properly set.Read More
HOW-TO Checking airflow across an evaporator during a service call Joe Marchese March 30, 2020 No Comments How important is airflow across an evaporator in a properly operating air conditioning system? If you ask a wide range of technicians you are likely to get many different answers, but the general consensus would likely be that it is important. Read More
Determining the Cause of Higher-Than-Normal Discharge Pressure Identifying the underlying reason for this condition can be tricky Joe Marchese March 9, 2020 No Comments Refrigeration systems operating at a higher-than-normal discharge pressure can be the result of several different issues.Read More
Verifying a Proper Pump Down Following correct procedure can prevent damage to compressor Joe Marchese February 10, 2020 No Comments Refrigerant migration can be damaging to a compressor. The refrigerant migrating back to the compressor can possibly slug the component.Read More
Pay Attention To Pressure Drop in HVAC Systems Severe pressure drop can adversely affect capacity of system Joe Marchese January 13, 2020 No Comments We need to be aware of the possibility of severe pressure drops creating an issue for the system and how we analyze its operation.Read More
To Repair Or Replace Refrigeration Equipment Contractor advice can help store owners make the right decision Joe Marchese December 9, 2019 No Comments If the repair will be more than 50 percent of the cost of a new system, it is generally best to replace it. However, there may be other factors.Read More
How to Find the Technical HVAC Information You Need Tracking down wiring diagrams and other materials can require patience Joe Marchese November 4, 2019 No Comments Controls offer many benefits to the design and operation of a system, but they can add a level of difficulty when troubleshooting a system failure.Read More