Service & Maintenance

Improving Chiller Efficiency

February 8, 2010
When you improve chiller efficiency, you can have better control of the chiller and the air conditioning in the building, and the chiller will also last longer. The recommendations here are for centrifugal chillers. Several different methods are suggested.
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Btu Buddy 82: Electric Heat Furnace Confusion

January 18, 2010
A call has come in from a new customer that the system in a small office building is not heating properly. Bob finds the building has an electric heat furnace and, when he removes the panel, he is amazed at how many wires and terminals there are and starts to become confused. Btu Buddy arrives to assist him.
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Troubleshooting Challenge: A Modular A/C Unit That's Not Cooling

January 4, 2010
In this month’s troubleshooting situation we’re taking you to a modular classroom with a heating/cooling unit that employs resistance-type elements for the heating mode, and a direct expansion system for cooling. The complaint is that there is “very little cooling” being accomplished.
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Btu Buddy 81: Frosting Heat Pumps

December 21, 2009
The day has been cold and damp, and Bob has been called to do a routine checkup on a heat pump in a condominium complex. Most of the units in the complex are frosted over, but the unit that he is to service has a very different frost pattern. Bob is trying to figure out what’s going on when Btu Buddy appears to help him.
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Top Five Reasons Commercial Customers Need an Energy Efficiency System

December 7, 2009
The greatest energy cost reduction opportunity lies with the HVAC system - a facility’s largest discretionary source of energy demand and, thus, its highest controllable expense. Advancements in commercial energy efficiency systems have now made them far more affordable for small to mid-sized facilities.
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Btu Buddy 80: Duct Restriction

November 23, 2009
Bob gets a service call where the owner says there is not enough heating at one end of an office building. With Btu Buddy's assistance, Bob checks the duct system and finds that a piece of duct liner is laying down in the duct blocking the airflow and he proceeds to correct the problem.
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Troubleshooting Challenge: A Furnace That's Not Heating the Whole House

November 9, 2009
In this troubleshooting situation, we have a customer who is complaining about one of the bedrooms in their home, specifically that the gas furnace doesn’t warm the room properly. When you arrive, you find that the bedroom in question is the furthest from the furnace, and that the duct system is an extended plenum system.
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Btu Buddy 79: Lunchtime Lesson on Dew Point

October 19, 2009
Their last service call is continued as Bob and Btu Buddy meet for lunch at the restaurant where the call occurred to discuss dew point. The duct through the dining room was dripping because the duct surface temperature was below the dew point temperature of the room and moisture formed on the duct surface.
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An Ounce of Prevention Can Be Worth $1 Million

October 5, 2009
We probably heard it many times growing up, the old adage that an ounce of prevention is worth a pound of cure. When it comes to your customer’s HVAC system, preventive maintenance not only increases the life of the system, improves energy efficiency, and reduces pollutants, but it also saves homeowners money.
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Btu Buddy 78: Sweating Duct

September 21, 2009
Bob gets a call from the dispatcher that a new customer, a restaurant, has some ductwork in the dining room that has been sweating during the lunch hour for the last several days and dripping on the customers. It is about lunchtime so Bob goes to the restaurant to check it out. Btu Buddy helps in solving the problem.
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