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ONE CAUSE FOR ICED-UP EVAPORATORS
In the HVACR world, it is not impossible that the designers of a walk-in cooler/freezer to mistakenly chose the wrong FPI (fins per inch) selection for the application you are servicing. Here is a table to reference when you are looking at possible causes of an iced-up coil. With fin spacing too close, frost can …
A GAME-CHANGING APP
I just can’t say enough about an app that has become an essential part of my life and the overall operation of our HVACR service team. I am talking about EVERNOTE. It is one of the best ways to assemble, organize and present information that I have ever seen. Now you may be thinking that …
TESTING AIR FLOW IN SUPERMARKET CASES
One of the ways to assure that a customer’s case is performing as it should is to test the airflow. One of the best ways to do this is with a test instrument that measures feet per minute as illustrated. Be sure to measure the airflow at the case discharge air outlet as illustrated below: …
Indoor Air Quality Begins Here
The final factor in evaluating the air distribution in a space is the comfort of the occupants. In general, a person is thermally comfortable when body heat loss equals body heat production. What most people call a “draft” is simply a slight movement of air that results in a local feeling of “coolness.” It has …
Sheave Maintenance
Routine maintenance of blower sheaves should include a close examination of the alignment of the motor and blower sheaves. Proper belt tension is also important to maintain the life of the sheaves. Groove gauges are often provided by belt and sheave suppliers to test the sheave walls for wear to determine the need for replacement. …
VIBRATION ELIMINATORS
Rigid connections at the compressor are prone to crack or break from vibration and stress. The cause may be discharge gas pulsation or compressor movement because of high torque. There is a simple way to prevent line breakage from these causes. Install vibration eliminators in both the suction and discharge lines. They should be the …
RSES Adds Four More HVACR Training Products to Online Store
Rolling Meadows, Ill. (Dec. 14, 2017) – RSES is pleased to announce the addition of four additional HVACR training books to its online store. All four titles are published by ESCO Group and add to the ever-expanding library of materials RSES offers to help industry professionals excel at their jobs. Sample sections of each manual …
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RSES Offers HC Training, NATE Testing at the 2018 AHR Expo
Rolling Meadows, Ill. (Dec. 21, 2017) – RSES will be an active player during the 2018 AHR Expo being held in Chicago on Jan. 22–24, 2018 at McCormick Place in Chicago. In addition to residing at booth No. 4443 during the show, RSES Region 2 Director Art Miller, CMS, RCT, will be presenting “Hydrocarbons as …
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MY LIFE WITH EVERNOTE
I would not know what to do if I didn’t have Evernote to use as a tool for our business. I am the Training Manager for a Commercial Refrigeration company specializing in supermarket refrigeration. Our service team all have the mobile version on our Android devices. My wife and I both have a premium version …