Stay cool! Keep it running.

Carlson and Stewart wants to ensure that your equipment continues to run at optimal performance. On this blog, we offer important tips for maintaining your refrigeration equipment.

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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” on your evaporative condenser? [I am guessing your hand might be in the air]. How many of you feel that this is “normal” and something that should be treated as a “side effect” from running an...
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 Refrigeration, Inc. has not been an exception! However, we are proud to say that our team members have stepped up to the plate and are working hard to...
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 of compressing, condensing, expanding and evaporating. Secondary refrigerants typically transfer heat from place to place without...
January Blog   (source website https://www.heatcraftrpd.com/regulatory/)   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 implemented changes on new energy use standards that have become law across the country...
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 you in the right direction.  CO2 is certainly gaining in popularity in the United States and more and more experience...
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 a direct expansion evaporator, should be a “...
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 even a system running perfectly might not always be as cold as you’d like. What can be done to improve your situation? A business owner or refrigeration operator is faced...
September Blog Entry Author: Jarod Hansen     Source Article: https://www.contractingbusiness.com/refrigeration/propane-makes-comeback Propane… Possible Commercial Refrigerant? 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...
August 2019 Blog Entry Author: Erik Hansen Credit: Goodway Technologies Corporation Reference: https://www.goodway.com/hvac-blog/2009/08/ammonia-as-a-refrigerant-pros-and-cons/ 2016 Article   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...
Ammonia Compressors – by Chris Savage 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 of increasing the pressure of ammonia vapor.  They provide the motivating force that moves the refrigerant through the system. ...

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