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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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. ...
Operational Efficiency: Condenser Drain Lines By: Jayson Noetzelman        Carlson and Stewart Refrigeration would like to take some time to address an often-ignored problem in industrial refrigeration systems. The problem is a lack of knowledge about pressure requirements to successfully operate a spring closed check valve. Spring closed check...
Author: Erik Hansen (source article: http://www.eurammon.com/press-room/background-articels/supermarkets-advocate-sustainable-refrigeration) Supermarkets Advocate Sustainable Refrigeration [The food retailing secle Refrigerationtor increasingly uses natural refrigerants] For a long time now, consumers not only look at quality and price when making...
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 walk-in coolers, freezers, and warehouse complexes involves a lot of expense.  If the unit is not defrosted often enough there is the wasted energy of...

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