Check out the latest issue of RSES Journal for features including: Best Practices for Residential Boiler Service, Methods of Defrost in Refrigeration Applications, Sensor System Integration and more. All inside your October 2020 RSES Journal issue.
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RSES Announces 2020–2021 International Board of Directors
RSES International Board and Auxiliary Board of Directors were sworn into office at the 2020 RSES Virtual Business Meeting.
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Part 3: EC Indoor Blower Motors, Resistance is Futile
In this article, I will focus on diagnosing the ECM when it is not operating. EC
indoor blower motors are commonly designed with two separate inputs for proper operation: 1Th e line voltage that powers the ECM; and 2the communication that provides the on/off command as well as the operating value (speed, torque or airflow). Both of these inputs are necessary for the ECM to operate.
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Hydronics: Best Practices for Residential Boiler Service
Boilers must be serviced annually—there is no way around it. A boiler that is not properly serviced and maintained will be prone to breakdown or, at best, operate at a lower efficiency and costing the homeowner money. This article will focus on residential service. Commercial building owners tend to be more diligent about boiler service, and they do not do things such as planting
shrubbery around intake and exhaust vents to hide them.
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Methods of Defrost in Refrigeration Applications -- Part 1
Refrigeration systems that operate with an evaporator refrigerant saturation temperature of 32°F (or lower) will experience an accumulation of frost on the evaporator tubes and fins. The frost acts as an insulator between the heat load in the refrigerated space and the refrigerant fl owing inside the evaporator tubing, decreasing the efficiency of the heat transfer process.
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Sensor System Integration
Low-cost, easy-to-install wireless sensors are becoming standard practice when it comes to remotely monitoring temperatures in refrigeration equipment such as walk-in coolers and freezers, cold rooms, beverage coolers, cold tables and more. Such sensor systems can be retrofi tted to existing equipment or used with new equipment to monitor temperature, humidity, vibration and other conditions.
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RSES is the leading education, training and certification preparation organization for HVACR professionals. RSES publishes various comprehensive industry training and reference materials in addition to delivering superior educational programs designed to benefit HVACR professionals at every stage of their careers through instructor-led training courses, online training for HVAC, educational seminars, interactive CD and DVD products, industry-related reference manuals, and helpful technical content through Service Application Manual chapters, the RSES Journal, the RSES Journal archives and feature articles, as well as web-exclusive features.
Beginning with basic theory and extending to complex troubleshooting, training courses covering refrigeration and air conditioning, heating, electricity, controls, heat pumps and safety may be conducted in a classroom environment or though self study. RSES publications may be purchased by schools, contractors, manufacturers or any other industry group wanting to conduct comprehensive training programs. Seminars covering air conditioning troubleshooting, electrical troubleshooting, compressor training, condenser training, refrigerant piping practices, DDC controls, and more are held in various cities across North America.
Select training programs offer Continuing Education Units (CEUs) and NATE Continuing Education Hours (CEHs).
In addition, RSES offers industry certification preparation materials for refrigerant handling (EPA Section 608), R-410A and North American Technician Excellence (NATE) examinations.
RSES’ monthly magazine, RSES Journal, serves HVAC contractors, service technicians, students, operations/maintenance managers, engineers and technicians who work in the residential, light commercial, commercial and institutional markets on air conditioning, warm-air heating, refrigeration, ventilation, electrical, ice machines, chillers, hydronic heating, piping, refrigeration control and energy management, building automation, indoor air quality and duct cleaning, and sheet metal fabrication equipment and/or systems.
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