Climate Control
HVACR Tech Tip: Coil Cleaning Basics for the HVACR Service Technician
Cleaning air conditioner condenser and evaporator coils is a basic need for proper system maintenance. In fact, it is probably the number one performed maintenance task by air conditioning...
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HVACR Tech Tip: What Every Technician Needs to Know About Refrigeration Oils
Here is some information concerning refrigeration oils that every HVACR technician will find useful. Oil types Mineral – a by-product in the distillation of crude oil to produce gasoline. Mineral...
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HVACR Tech Tip: Maintaining Refrigerant Flow in Thermostatic Expansion Valves
Most supermarket refrigeration equipment breakdowns are repeat problems. When responding to refrigeration service calls at supermarkets, refrigeration technicians immediately play...
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HVACR Tech Tip: Prevent Destructive Superheat with TREV Liquid Injection
A large percentage of compressor failures in low-temperature vapor-compression refrigeration system applications originate from overheating. Typical compressor capacity rating data is based on...
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HVACR Tech Tip: Obtaining Oil Samples in a Refrigeration or Air Conditioning System
Monitoring the acid level in a refrigeration or air conditioning system is of the utmost importance. Contaminants such as water and air are important factors in the formation of acids in the...
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HVACR Tech Tip: A Psychrometrics Reminder for the HVACR Technician
Here is information on Psychrometrics that should help remind the HVACR technician what this subject is all about... with perhaps a few tidbits the tech may not have known! Psychrometrics: the...
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HVACR Tech Tip: Everything You Want to Know About Superheat
Superheat is the temperature of refrigerant gas above its saturated vapor (dewpoint) temperature. Superheat as it relates to thermostatic expansion valves, can be broken down into three Superheat...
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Top 5 HVACR and HVAC Climate Control Technology Blogs of 2017
In 2017, many changes impacted the HVACR, HVAC climate control industry. New technologies emerged that changed the way we do business – most for the better! But they also brought a shift in the way we...
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HVACR Tech Tip: Master Using the P-T Chart with the ChillMaster Mobile App
The HVACR service technician uses an array of tools and test instruments to diagnose problems and evaluate system performance. One tool that is readily available, inexpensive and yet rarely used to...
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Use of Suction Line Filter-Driers for HVAC Clean-up After Burnout
The Suction Line Filter-Drier method of cleaning up a system after a hermetic motor burnout is favored by service technicians and recommended by manufacturers throughout the HVAC and...
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HVACR Tech Tip: Understanding and Preventing Superheat Hunting in TEVs
A common problem facing refrigeration and air conditioning service technicians and contractors is that of superheat hunting by thermostatic expansion valves (TEVs). Here is a better understanding of a...
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HVACR Tech Tip: Considering a Refrigeration System Retrofit? Part 3
This is the third part of a three-part series of posts on high-glide refrigerants for refrigeration system retrofits. Part 1 covered calculating superheat and subcooling with glide, and control of...
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HVACR Tech Tip: Considering a Refrigeration System Retrofit? Part 2
This is the second part of a three-part blog series on high-glide refrigerants for refrigeration system retrofits. Part 1 covered calculating superheat and subcooling with glide, and control...
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HVACR Tech Tip: Considering a Refrigeration System Retrofit? Part 1
Refrigerant choices for refrigeration systems are undergoing significant change, including choices for retrofits and new systems. This article is Part 1 of a 3 part series addressing such retrofits,...
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HVACR Tech Tip: Basic Troubleshooting Given Three Measurements
What if you are only given 3 measurements? As HVACR technicians, you need some ideas in your back pocket for basic troubleshooting in a refrigeration system. How about a simple chart that helps you...
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HVACR Tech Tip: What You Need to Know About Flooded Head Pressure Control
Below are six questions that will help you learn most of what you need to know about flooded head pressure control.   1. Why do you need a receiver? The flooded head pressure control valve maintains...
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HVACR Tech Tip: Using Bi-Directional Solenoid Valves for Heat Pumps
A solenoid valve with a built-in check valve is designed to replace a liquid line solenoid valve in parallel with a check valve for reverse flow. This valve may be applied in the liquid line of...
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HVACR Tech Tip: Principles of Thermostatic Expansion Valves
In order to understand the principles of thermostatic expansion valve operation, a review of its major components is necessary. A sensing bulb is connected to the TEV by a length of capillary tubing...
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HVACR Tech Tip: Electric Head Pressure Control Recommendations
When designing a system using stepper motor style electric valves, such as CDS or SDR valves and A8-to-CDS conversion kits, in head pressure control applications additional precautions and...
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HVACR Tech Tip: When Should a Catch-All Filter-Drier be Changed?
It is important to locate a filter-drier in a refrigeration system. Its role is to remove moisture from the refrigerant and lubricant by absorbing and retaining moisture deep within the...
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