Month: November 2012

Steam Heat Performance Tips

FROM CONTRACTOR MAGAZINE With energy costs at record levels, efficiency is on the minds of homeowners, and contractors are being asked to bring utility bills down. Try this steam system checklist on your next “I can’t afford to heat my house” call. READ MORE….

Heatcraft Unveils State-of-the-Art Innovation Center

Heatcraft Worldwide Refrigeration announced the development of an Innovation Center, which highlights the company’s more than 125 years of refrigeration expertise with global innovative products, training services and high-tech laboratory. The new center offers the opportunity for both customers and employees to participate in innovative new product developments and expand their knowledge with an array …

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HVAC/R Electricity

AN ARTICLE FROM CONTRACTING BUSINESS INC. There are three basic types of wiring diagrams used in the HVACR industry today. The first, and most common, is the ladder diagram. From this point forward, ladder diagrams will be referred to as “schematic” diagrams, or “schematics.”  READ MORE…

ELECTRICAL SAFETY

A capacitor can hold a charge for several days (depending on its size and capacitance value). The old “tried and true” method of discharging a capacitor was to use a screwdriver or jumper wire to short across the capacitor’s terminals. Today’s run-type capacitors have internal fusing. If you were to place a direct short across …

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Making Your Service Dept. Profitable

More companies today see service departments as profit centers instead of cost centers. In fact, 55 percent of U.S. organizations have that outlook, according to Service Council President Bill Pollock in an article on Service Management Online’s website. READ MORE… FROM: SERVICE MANAGEMENT TODAY

Internal versus External

Pressure drop between the valve outlet and the evaporator outlet is the most important of the low-side pressure losses that affect valve performance. These pressure drops will hold a TEV in a relatively “restricted” position. This will reduce system capacity unless a valve with an external equalizer is used. These figures show the internal differences …

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RSES Conference Follow-up

By Carter Stanfield I just returned from the Annual RSES Conference in Charleston, South Carolina. What a great experience! Of course there were many great speakers on a wide range of current HVACR topics, READ MORE:

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