Here is a review of a couple of problems you can encounter when dealing with defrost systems. They relate to the system either being overdefrosted or underdefrosted.
Guidance on the use of carbon dioxide (CO2) has been added to the American Society of Heating, Refrigerating and Air-Conditioning Engineers' (ASHRAE) 2006 Handbook, Refrigeration.
This article covers the theory and operation of potential starting relays. The article that will appear in the Aug. 7 issue will cover potential relay ratings and specifications along with systematic troubleshooting.
President Bush used an address at the Restaurant, Hotel-Motel Show to touch upon issues of interest to owners of food service businesses that could well extend to HVACR contractors, who also play a part in restaurant customer comfort and food product safety.
Stacking is the abnormal accumulation of refrigerant in the condenser of a chiller. It is commonly caused by a decrease in the difference in pressure or lift between the condenser and the evaporator.
Contractors who do commercial refrigeration work in restaurants, hotels, and motels know that trends in ice making, cooling, and freezing as well as servicing are ever changing. A large number of those newest trends were on display at the recent Restaurant Hotel-Motel Show.
Every report of hurricanes, heavy rains, flooding, tornados, and earthquakes can create nervousness but can also result in contractors redoubling efforts to do everything possible to mitigate damage to their businesses, assure the safety of their employees and be able to rapidly respond to the needs of their customers.
IAQ accessories are often viewed as nice to have if consumers can afford them after replacing their furnaces or air conditioners. That can make it a difficult sell for contractors; however, manufacturers are doing their best to educate homeowners about the consequences of indoor pollutants.
Progressive counseling is one of a manager's best defenses against mediocre performance and poor employee morale. Fortunately, using this tool is not as difficult as you might believe.
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