Service & Maintenance

Btu Buddy 53: Helping on a 100°F Day

August 20, 2007
The temperature is 102° outside. The complaint is from a car dealership. The showroom temperature is 85° and the dealer is having a big sale the next day. Bob finds the a/c unit is already doing all it can. Btu Buddy shows Bob some tricks to get more out of the system.
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Chiller Maintenance

August 6, 2007
The chiller maintenance tool that contributes most to a chiller’s overall efficiency is the daily log. An accurate daily log will provide a daily snapshot of the chiller’s operating characteristics and make abnormal conditions easy to spot.
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Btu Buddy 52: Topping Off the Charge for a TXV System

July 23, 2007
In this installment of the Btu Buddy series, Bob and Btu Buddy meet on another job that has a low charge. This unit has a thermostatic expansion valve (TXV). They determine the evaporator is starved for refrigerant and check to see why.
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Fixing a Noisy Indoor Unit

July 9, 2007
Noisy indoor unit complaints usually fall into one of six different categories. Problems include a loose, broken, or out of balance blower wheel. Here is a discussion of possible causes and items to check.
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Btu Buddy 51: Topping Off the Charge for a Fixed Bore Metering Device System

June 18, 2007
In this edition of the Btu Buddy series, Bob works on a system that is not working up to capacity. He finds the suction service port is leaking, repairs it, and tops off the charge.
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Cooling Tower Safety and Maintenance

June 4, 2007
Aligning cooling tower debris management and water treatment procedures is key to a company’s worker health and safety, the company’s reputation, and operational efficiency.
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Btu Buddy 50: Reciprocating Chiller With Fouled Condenser Tubes

May 21, 2007
In this installment of the Btu Buddy series, Bob goes on a service call to a motel where the chiller has shut down. He finds that both the water tower and the chiller's condenser tubes are dirty and require cleaning.
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A Review of the Refrigeration Cycle

May 7, 2007
This article discusses the refrigeration cycle, highlighting the various components - compressor, condenser, metering device, and evaporator - and the flow of refrigerant through the system.
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Btu Buddy 49: Grounded Compressor Motor (Continued)

April 23, 2007
In this edition of the Btu Buddy series, Part 2 of last month’s article, Bob and Btu Buddy meet the next morning to change the compressor in the system.
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Air Conditioning Start-Up Checklist

April 9, 2007
This convenient a/c start-up checklist from the Hartford Steam Boiler Inspection and Insurance Co. has been designed to help maximize reliability, economy, and fuel conservation in the operation of air conditioning equipment.
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