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GET READY – CONTROLS COURSE COMING TO NASHVILLE

WATCH FOR NEWS ON THIS AND OTHER UPCOMING EVENTS AT MIDTENNRSES.NET

ONLINE REGISTRATION HAPPENING SOON!

FOR MORE INFORMATION ON HVACR HAPPENINGS, VISIT MIDDLE TENNESSEE RSES HERE

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Working With HVACR Condenser in Cold Climates

Special considerations must be taken when installing condensers in cooler climates. During the colder weather, a winterizing valve should be utilized to maintain head pressure. This valve is actuated by a pressure difference between its inlet and outlet. The figure shows a “Winterstat” brand. Other valves may be used such as a “Headmaster” valve. If system pump-down is a desired feature, the receiver must hold the normal refrigerant  charge plus the condenser charge with the bypass valve operating ̶ that is, partially open or intermittently opening and closing.EXCERPT FROM “TOOLS, CONTROLS AND TROUBLESHOOTING“, available from the ONLINE STORE at RSES.ORG.

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Side-Cutters with Wire Stripper and Crimper – YouTube

New, from Klein Tools!


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HYDROCARBON Refrigerants Training

Screenshot 2015-12-25 19.11.40
  • Before servicing any system, check the compressor and system labeling to determine whether the system being serviced contains a flammable refrigerant.A compressor designed for flammable refrigerant use should have the refrigerant designation printed on the compressor serial label, and may also display a separate flammable refrigerant label (see below): 

 Screenshot 2015-12-25 19.21.15

Compressor with: (1) serial label,
(2) flammable refrigerant label, (3) warning label

Excerpt from HYDROCARBON REFRIGERANTS, A Study Guide for Service Technicians

Available from the HC ONLINE STORE at RSES.ORG    The HVACR Training Authority

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Troubleshooting Frozen Food Cases/content from Contracting Business

Most supermarkets have a considerable number of glass door display cases.

This article will focus on frozen food cases that use direct expansion evaporators, and that are connected to supermarket rack systems that use HFC refrigerants.

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Source: troubleshooting frozen food cases begins with assessment of saturated suction temp | Refrigeration content from Contracting Business

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How To Troubleshoot HVACR Electrical

TroubleshootingBullets

Be prepared-remember that good troubleshooting requires a thorough understanding of the basics.

The service engineer should know the normal system operation, since a large part of troubleshooting is visualizing what is happening throughout a system.

One tool to aid the troubleshooter in understanding the system is the electrical flow chart provided by many equipment manufacturers.

Avoid the bad habit of skipping steps in the process.

Try not to draw quick and usually inaccurate conclusions before a complete analysis.

For the testing process, good, reliable test instruments are among the most valuable tools that any service technician can have.

Excerpt from “Electricity for HVACR Technicians”, available from the online store at RSES, THE HVACR TRAINING AUTHORITY.

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Meter Safety Reminders

Meter1

Electrical meters are so commonly used by service technicians that most take them for granted. Rarely are meters considered a source of potential danger. But the electrical meter, being as versatile and easy to use as it is, can very easily become the path of current between the power supply and the technician!

In most cases, the voltage supply for HVACR equipment does not exceed 600 V. For such applications, it is important to use a meter with a Category III 1,000-V rating minimum. This rating means that the meter has the proper circuit protection (fusing) and insulating leads to be used safely in most HVACR applications. This figure shows a typical digital multi-meter.

EXCERPT FROM “Electricity for HVACR Technicians”. Available from the ONLINE STORE at RSES.

Elec for hvacr techs1

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FREE HVACR Seminar

Oct2014 Promo

Screenshot 2014-09-29 20.11.07

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Checking The Insulation On Your Tools

http://www.youtube.com/watch?v=GGgYnZKqLSI

 

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T&O Refrigeration: Commercial Refrigeration Contractor of the Year

Steve-Denese

It is a source of great satisfaction for the business owner when he can point to significant achievements on the road to success. Each achievement serves as a milestone, is a reward for past efforts, and provides hope and encouragement for future victories.

There have been many milestones along the way for Steve Tibbetts, founder and president of T&O Refrigeration, located in Fayetteville, GA. Together, all of T&O’s successes signify a journey of high excellence in the challenging and ever-changing world of supermarket refrigeration.

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T&O Refrigeration: Commercial Refrigeration Contractor of the Year | Refrigeration content from Contracting Business.