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Btu Buddy 30: Repairing A Restricted Liquid Line
In this installment of the Btu Buddy series, Bob goes on a no cooling call and finds a kink in the liquid line of the A/C system. Btu Buddy explains his choices for repairing the line.
By Bill Johnson
For The News
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Growing Your Business Through IAQ Particulate Profiling
Concern about indoor air quality (IAQ) is driving customers to have their IAQ situation assessed and, if necessary, repaired. IAQ has generated so much awareness that you may want to consider offering IAQ assessments to all of your customers as an extra service.
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Btu Buddy 29: Outdoor Unit With Restricted Airflow
In this edition of the Btu Buddy series, Bob finds an outdoor unit that has been enclosed by a deck. Bob and Btu Buddy come up with a temporary solution to restore adequate cooling and determine where to relocate the unit.
By Bill Johnson
For The News
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Quick Facts: Evacuation
This article discusses the purpose of evacuating a refrigeration system and how low a vacuum is needed to properly evacuate a system.
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Btu Buddy 28: A Stopped Up Condensate Line
In this installment of the Btu Buddy series, Bob's customer has a major problem with a condensate leak. Btu Buddy assists in solving the problem and suggests what to do to prevent a reoccurrence.
By Bill Johnson
For The News
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Checking Indoor Airflow
Indoor airflow in any air conditioning system is critical. Too much air and the customer suffers lack of dehumidification in cooling. Too little air in cooling may freeze the coil. Here are procedures on how to measure airflow.
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Btu Buddy 27: A Compressor With Internal Leak
In this edition of the Btu Buddy series, Bob's cooling system service call seems to be a classic case of low charge. With Btu Buddy's help, he discovers that it's actually a compressor problem.
By Bill Johnson
For The News
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Quick Facts: Superheat And Subcooling
Supeheat and subcooling are two terms that every service technician should know. Here are some quick facts on what they are and why they're important.
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Noncontact Temperature Measurements Using IR Thermometers
Infrared (IR) thermometers make it safe to take surface temperature measurements of items like rotating, hard-to-reach, electrically live, or dangerously hot targets. For preventive maintenance tasks, they cut measurement time to almost zero with the ability to take a surface temperature reading in less than one second.
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Avoiding TXV Trauma
To ensure maximum TXV performance, here are some tips on bulb mounting/location, brazing, valve orientation, external equalizer use, superheat adjustment, and troubleshooting.
By Steve Maxson
For The News
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Btu Buddy 25: Changing A Four-Way Valve On A Heat Pump
To finish the job they were working on last week (see “Btu Buddy 24: Looking At A Heat Pump Drawing A Lot Of Power”), Bob meets Btu Buddy at the jobsite to change the heat pump’s four-way valve.
By Bill Johnson
For The News
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Energy Recovery Wheel Maintenance
The maintenance requirements of filters, blowers, and motors are well known, but familiarity with energy recovery wheels is not as high. Understanding and implementing maintenance requirements for energy wheels will improve performance, effectiveness, and the life of the wheel.
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Btu Buddy 24: Looking At A Heat Pump Drawing A Lot Of Power
In this edition of the Btu Buddy series, Bob must diagnose a heat pump problem at a home where the power bill has risen dramatically in the last two months. Btu Buddy assists him in troubleshooting the system.
By Bill Johnson
For The News
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Gas Furnace Maintenance
This article provides recommended gas furnace maintenance procedures. The performance and operation of the furnace should be checked every year. This ensures the furnace owner of receiving the best possible performance and comfort from the equipment.
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Water Quality Guidelines For Evaporative Cooling Products
A proper water treatment program, administered under the supervision of a competent water treatment specialist, is an essential part of routine maintenance to ensure the safe operation and longevity of evaporative cooling equipment. Here are some treatment tips.
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Btu Buddy 22: Finding Excess Heat Exchanger Scale
In this edition of the Btu Buddy series, Bob goes on a no heat call and finds some large pieces of scale laying on a burner surface. Btu Buddy notes there are several possibilities for excess heat exchanger scale and helps Bob pinpoint the source.
By Bill Johnson
For The News
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Heat Pump Electrical Component Checks
In performing service and troubleshooting on heat pump systems, there are various electrical components to be checked. This article provides information to aid in inspecting and servicing these components.
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Btu Buddy 21: A Problem Of House Windows Sweating
In this installment of the Btu Buddy series, Bob goes on
a heating service call where all the windows in the house
are sweating. Btu Buddy assists in investigating to find the cause.
By Bill Johnson
For The News
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Ten Dumb Things Smart People Do When Testing Electricity
The pressures of getting a job done on time or getting a piece of equipment back on-line quickly can result in mistakes by even seasoned technicians. This article provides a reminder of what not to do when taking electrical measurements.
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Using The P-T Card As A Service Tool
The purpose of this article is to demonstrate the proper use of the pressure-temperature relationship, and to illustrate how it can be used to thoroughly analyze a refrigeration or air conditioning system.
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Btu Buddy 20: A Training Lunch With Btu Buddy
In this edition of the Btu Buddy series, Bob and Btu Buddy meet for a training lunch after the previous day’s low oil in the sight glass service call. Btu Buddy discusses oil and oil circulation in an A/C system.
By Bill Johnson
For The News
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Electric Motor Brake Horsepower Calculations
These motor calculations are useful wherever electric motors are used. These simple calculations can be used to solve motor installation and troubleshooting problems in a variety of applications.
By Norm Christopherson
For The News
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