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Natural Refrigerants Continue to Grow in Retail

Carlson & Stewart Refrigeration (CSR) understands there are many moving pieces in the industry to know and understand when it comes to selecting a refrigerant for your system.  CSR can ...
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Condenser Piping

10/6/2022 Author: Erik Hansen   Condenser Piping I recently completed a visit to a facility I have never been to before in Colorado.  The end-user had hired a 3rd party ...
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Honeybee’s

Honeybee’s By Chris Savage You might be thinking, why the heck would there be a blog post on a refrigeration website about honeybee’s?  Up to about a month ago, I ...
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Suction Lines: A Quick Overview

An important part of the refrigeration design process is determining what size refrigerant lines returning to a compressor or an accumulator/recirculator vessel should be. These return lines are often simply ...
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EPA Continues Work to Implement AIM Acted

Carlson & Stewart Refrigeration (CSR) understands there are many moving pieces in the industry to know and understand when it comes to selecting a refrigerant for your project. CSR can ...
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Stainless Steel Condenser Tubes or Galvanized? That is the question!

June 2022 Blog Post Author: Erik Hansen   Subject: Stainless Steel Condenser Tubes or Galvanized?  That is the question! NOTE: The posting will dig a little into product selection revolving ...
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Moisture Control

Moisture Control By Chris Savage Moisture control…..what does that mean? Relative humidity, dew point, condensation, evaporation, dry bulb, wet bulb, enthalpy, specific volume, humidity ratio, vapor pressure, dehumidification, desiccant, reheat, ...
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Evaporator Condenser Passivation

If you have ever been involved in buying or installing a new evaporatively cooled condenser, then you’ve probably heard about evaporative condenser passivation. You probably heard it is important and ...
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Adiabatic Coolers

Carlson & Stewart Refrigeration has replaced many evaporative condensers over the years.  Most of the time they are replaced with direct replacements because the existing steel structure is available.  In ...
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Ammonia Liquid Migration and Cold Weather Startup

Those of us in the northern climates are familiar with the cruel outside conditions.  Old Man Winter lets loose his cool breathe and our backyards and driveways become frigid winter ...
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Remote Temperature Monitoring & Alarming

Here at Carlson & Stewart Refrigeration we hear something like this all too often:  “My cooler/freezer quit working last night….now all of my product is lost.” What do you do ...
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Preventative Maintenance Basics – Condenser and Evaporator Coils

With fall fast approaching it is a great time to remind everyone about the importance of commercial refrigeration routine maintenance. Maintaining your systems for optimal energy efficiency is great for ...
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Is an Ammonia Refrigeration Evaporative Condenser a Permit- Required Confined Space (PRCS)?

Source Article: Condenser by IIAR By Bryan Haywood Carlson & Stewart Refrigeration (CSR) has been asked this question many times in the past and we have found that many people ...
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How many of you have “scale” on your evaporative condenser?

As summer approaches I thought it would be a good idea to revisit one of our previous blog postings from a few years back… How many of you have “scale” ...
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COVID-19 and Carlson & Stewart Refrigeration, Inc.

COVID-19 and Carlson & Stewart Refrigeration, Inc. Wow, the last month (more for others!) has been a whirlwind for every individual and every business around the world!  Carlson & Stewart ...
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Secondary Refrigerants Are Worth A Second Look

Secondary Refrigerants Are Worth A Second Look All refrigeration systems, at their very core, convert electrical energy into heat removal potential. Primary refrigerants typically do this via the refrigeration cycle ...
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Energy Efficiency Changes 2020

While we welcome the new year and all the challenges that come with it, the commercial refrigeration industry will see some energy efficiency changes. The Department of Energy (DOE) has ...
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CO2 As A Refrigerant – IIAR Standard

(source article:  “IIAR Moves Forward on CO2 Standard”, November 2019 Condenser Magazine)   Is CO2 as a refrigerant an option for you?  Carlson & Stewart Refrigeration, Inc. can help point ...
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EEVs Should be Standard Equipment, Says U.S. Energy Consultant

Source: http://r744.com/articles/9222/eevs_should_be_standard_equipment_says_u_s_energy_consultant EEVs Should be Standard Equipment, Says U.S. Energy Consultant Electronic expansion valves (EEVs), which are used in commercial display cases to automatically control the flow of liquid refrigerant into ...
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Staying Cool – Basic Heat Loads

Staying Cool - Basic Heat Loads by Jayson Noetzelman When it comes to refrigeration, Carlson & Stewart is in the business of helping you stay running and stay cool, but ...
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Propane… Possible Commercial Refrigerant?

Source Article: https://www.contractingbusiness.com/refrigeration/propane-makes-comeback In a time when refrigerants are being closely evaluated for their environmental impacts, propane (R-290) is emerging as an increasingly viable alternative. With a global warming potential (GWP) ...
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Ammonia As a Refrigerant: Pros and Cons

Ammonia As a Refrigerant: Pros and Cons Last month, a 5000 pound ammonia leak occurred at a Boston-area seafood warehouse that killed one worker and forced a shelter-in-place order from Boston Police.  Problematic procedures ...
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Ammonia Compressors

Over the years there are and have been a variety of compressor styles that have been used in ammonia refrigeration systems.  Each of these compressor styles accomplish the same task ...
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THE EFFECT OF CONDENSER SCALE ON SYSTEM PERFORMANCE

How many of you have “scale” on your evaporative condenser? [I am guessing your hand might be in the air]. How many of you feel that this is “normal” and ...
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HOUSEKEEPING AND GENERAL MAINTENANCE

Over the years of working in literally hundreds of compressor / engine rooms we have noticed a correlation between the cleanliness and neatness of the compressor room and the general ...
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REFRIGERANT LEAK DETECTION

We all know that refrigerant leaks cost money! The hissing sound of a leak is not so much SSSSSSSSSSSSSSS as it is $$$$$$$$$$$$$$$$! Let’s find and fix the refrigerant leaks ...
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CLEAN & EFFICIENT CONDENSERS

This article will target refrigeration systems that utilize air cooled condensers, but the efficiencies to be gained apply to the users of evaporative condensers as well. First, let us remember ...
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THE FUTURE OF R-22

You are receiving this notice because you are the owner / operator of a refrigeration or air-conditioning system that utilizes R-22 refrigerant and we want you to understand, and be ...
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DEFROSTING AIR UNIT EVAPORATORS

How often and for how long should an air unit evaporator in a cooler or freezer be defrosted? Hot gas and electric defrosting of air units that are installed in ...
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OIL SAFETY SWITCHES

Check your oil safety switches! Many commercial refrigeration compressors (i.e. Copeland) and essentially all industrial reciprocating compressors, like Vilter 450, 440 & 350 series, have force fed lubrication systems.  The ...
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REFRIGERANT LEAK DETECTORS

The typical ammonia (and other refrigerants) leak detection system consist of one or more sensors communicating to a readout or display.  Internal in the sensor is a “cell” that picks ...
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