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.
When we last visited with lead installer John and his helper Charlie, they had learned how to measure external static pressure on a new system. They were shocked to measure a high 0.98 inches of water column - and surprised when their trainer asserted the airflow through the unit was probably OK.
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.
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.
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.
Measuring duct static pressure is a fundamental part of
diagnosing how a duct system is performing. It’s kind of like getting your
blood pressure tested when you go to the doctor.
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.
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.
The correct placement and installation of a
thermostatic expansion valve’s (TXV’s) sensing bulb is important to its overall
performance and reliability. An incorrectly installed or placed sensing bulb
can lead to two major system problems.
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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