Articles Tagged with ''troubleshooting and HVACR''

In this month’s troubleshooting situation, our customer has called to say that the roof-mounted gas pack on their 1,500-square-foot home isn’t keeping them cool. Their specific description of the problem is that they “can’t feel any air” coming from the supply registers.

It is the system check sheet that will tell the service technician whether a system is overcharged or not. Service technicians must install pressure gauges and thermistors — or some other sort of temperature-sensing devices — in order to systematically troubleshoot a refrigeration system correctly.

The suction line of a refrigeration system is normally insulated with a flexible, closed-cell elastomeric material. Insulating the suction line is done to prevent condensate from developing and dripping off. It also limits the amount of heat added to the refrigerant as it travels back to the compressor.

A new book, Electricity for HVACR, by Joe Moravek, has been released by Pearson Publishers. According to the author, this book was written to help a person with no electrical experience or training to understand the operation of HVACR electrical circuits and how to troubleshoot and repair an HVACR system.

Bob and Tim were driving to the job they left yesterday and talking over what needs to be done today, when Tim asked, “How are we going to move the condensing unit we disconnected to the new location so we can connect it to the system where we disconnected the defective condensing unit? You said you had a plan.”

Bob and Tim were on their way to a no cooling call at a commercial building location. This is a large manufacturing plant that has a number of installations. They arrive and talk to the maintenance man and he tells them which unit it is and goes with them to the area that the unit serves. It is a large room served by a 20-ton split system.

In this month’s troubleshooting problem we have a homeowner who has attempted to repair his own equipment, and he has replaced two components. The original symptom of the split system sitting dead still exists.

In this month’s troubleshooting situation, we’re taking you to a school, but not to the equipment room of the main building. Instead, it’s a modular classroom (similar to a double-wide manufactured home) that is brand new, and employs a heating/cooling unit that mounts on one end of the building.