Hussmann’s laboratories test the concept, function, and reliability of each new product in accordance with ASHRAE guidelines, UL and NSF standards.

Our merchandisers are designed to operate in a controlled environment of 75°F (24°C) and less than 55% R.H. Merchandisers will not operate properly in environments of extreme temperature and humidity [above 75°F (24°C) and 55% relative humidity].

Laboratory testing provides guidelines for operating in an optimum environment. Adjustment is expected in actual store environments.

Settings in these tables should be the starting point when setting up a glycol refrigerant system, with adjustments to flow rate to compensate for external environmental effects such as:

• ambient temperature
• relative humidity
• external air flow patterns
• external heat sources (ovens, grills, etc. or direct sun)

Additional adjustment may be required

• if shelves are added, moved, or removed
• if the product load changes significantly
• during heavy shopping seasons

Click on the links below to see the desired Hussmann merchandiser Glycol usage chart: