Both Lowe’s Companies Inc. and The Home Depot Inc. are going after professional contractors by offering special programs designed to meet the needs of people who do this work for a living.

To accurately troubleshoot issues in the field, Danfoss created a one-source solution: The HVACR Service Tool allows for fast and easy problem-solving using keyword search, helping technicians as they diagnose and resolve issues.

Bob and Tim arrive at the jobsite of a new customer. The customer is the owner of a shopping center that has a branch post office as one of its tenants. The complaint has been that the system is not controlling the indoor temperature in the postal facility. Tim tells Bob as they are arriving that the service ticket says that they are to service a 20 ton split system that uses a hot water coil for heating and an air conditioning coil and condensing unit for cooling. They are to do routine maintenance on the entire system.

Thermostatic expansion valves (TXVs) come in many different shapes and sizes. Although they all are designed to control the superheat value of the refrigerant leaving an evaporator, there are some differences among TXVs that either enhance their operation or slightly change how they operate.

The capacity of a compressor can be affected by a refrigeration system’s ever-changing pressures. In addition, suction pressure entering the compressor will change the density of the suction gasses within the compressor and affect its capacity.

The steps taken in the first 30 minutes of a leak at an ammonia refrigeration facility can make the difference between containment and catastrophe.

When replacing a component, it is generally best practice to obtain its replacement by referencing its part number and installing a component with the same part number. Unfortunately, this is not always possible or practical. Due to the nature of the systems we service, many times we are forced to select a replacement component based on either a cross-reference or by matching its specifications to those of the original component.