Two combustion analyzers, models 310 and 320, can be used by HVAC techs for residential tuning and commercial applications. The 310 is a residential analyzer designed to measure flue gas, draft, ambient CO, and pressure, while the 320 is for residential and commercial boiler/burner tune-ups, service, and maintenance.
Bob and Tim have arrived at a “no cooling” call at a commercial building location. They went first to the thermostat and noticed that the indoor fan was running, but there was no cool air coming out of the air registers.
Many service technicians believe that frost on a suction line or on the compressor’s head itself indicates there is liquid refrigerant coming back to the compressor. Is this really true?
American Mechanical Inc., a HVAC, plumbing, and electrical contractor, has announced that two of its technicians recently completed Generac generator training courses. “All of our generator installation technicians are Generac certified and Briggs and Stratton certified,” said Louise Gordon, vice president of operations.
Bob and Tim have been sent on a call to a house with no cooling. The system has just been installed and the construction crew has been having problems with startup. The system has a capillary tube metering device and Bob and Tim begin looking at what may be wrong.
Bob and Tim were on their way to a residence where the occupants said their unit runs all day long, but the space temperature rises to 82°F while the thermostat is set at 75°. The unit shuts off during the night and the temperature inside is 75° in the morning, but during the day it rises.
While it may cost a few more pennies initially, properly maintaining a rooftop unit will help ensure the device continues to provide peak performance, saving a consumer a collection of pennies in the long run. What could you be doing for your customer?
Bob and Tim were on their way to a no cooling call at a commercial building. When they arrived, they talked to the building manager and checked the thermostat. It was set at 72°F but the thermometer was reading 78°. Tim said, “The fan is running, so there is control voltage and the thermostat seems to be calling for cooling.”
A newly published guideline from ASHRAE grants facility managers and building operating staff a foundation on which to improve performance of all buildings.
