In this troubleshooting situation, the equipment you’re servicing is a 240-volt, single-phase split system in a small office, and the customer’s complaint is that the system is blowing warm air.

Hybrid sealants are drawing more attention from contractors and distributors. According to comments from within the industry solicited by Cliplight Manufacturing, which makes a variety of sealants, there is an interest for sealants that are a combination sealant, drying agent, and dye.

Many refrigeration systems are installed using an outdoor air-cooled condenser. When these systems are installed in a climate where the outdoor temperature drops below 60°F, some means of preventing the condensing pressure from dropping too low must be incorporated into its design.

Bob and Tim are on the second day of an inspection of an apartment house building that has multiple split-system heat pumps. They have inspected all 60 outdoor units on the roof. They are now going to inspect the indoor units.

The problem in this scenario is a restricted liquid line after the receiver. Where do you go from here?

Properly sizing and installing the suction line of a refrigeration system is very important to its overall operation. What happens when they aren’t installed properly and how can you avoid this? 

Usually a HVAC contractor performs maintenance in the spring, in preparation for the upcoming summer. But, what about fall maintenance for the upcoming winter months?

Bob and Tim have arrived at the apartment house that they have been working at for the last several days. They’ve gone to the roof where the outdoor units are located. There are 60 heat pumps that use R-22 as the refrigerant. They start with Unit No. 2.

Siemens Industry Inc. announced that the Green Building Operations and Maintenance Manual: A Guide for Public Housing Authorities, developed in collaboration with Green Seal Inc., is now available to the public online and free of charge.

The obvious method to keeping energy bills in check is for homeowners to have regular maintenance performed on their gas boilers to ensure they are running optimally. Another way to cut down costs is to make strategic retrofits that can improve the efficiency and safety of older boiler systems.