That sounds pretty good, but what does that mean to you? To installers and buyers this means doing your job in making sure that every Freeaire installation is in an appropriate location and done in accordance with the installation instructions. It means that you take on some of the responsibility for ensuring that the Freeaire System provide safe, adequate, uninterrupted refrigeration to the space you have chosen. It also means that you must heed the following warnings and precautions:

#1: ALLOW ONLY AUTHORIZED FREEAIRE DEALERS OR SERVICEPERSONS WITH A THOROUGH UNDERSTANDING OF THE FREEAIRE SYSTEM TO ADJUST THE SETTINGS ON THE COOLER CONTROLLER. A Freeaire system can provide correct refrigeration to a cooler or freezer when the internal settings on controller are correct for the particular installation. Do not give unauthorized persons the password for either the user's or the installer's menu.

#2: THE FREEAIRE SYSTEM'S COOL BREEZEtm OUTSIDE AIR PACKAGE DOES NOT MAKE COLD AIR. IT ONLY MOVES IT FROM ONE PLACE TO ANOTHER. This means that the Freeaire must work with a functioning compressor-driven or other refrigeration system in order to provide refrigeration at those times when it is too warm outside. Please don't call us from the Caribbean saying that your Freeaire System with Outside Air is not working!

#3: THE FREEAIRE WITH OUTSIDE AIR MAY NOT PROVIDE THE HEAT NEEDED TO KEEP YOUR WALK-IN COOLER FROM FREEZING. We cannot be held responsible for freezing of product that is stored in a space that is too exposed to the outside weather. Just because nothing has ever frozen inside a walk-in cooler in the past when using a compressor system does not mean that freezing might not occur with a Freeaire system with an outside air package, if certain conditions exist. Continuous operation of evaporator fans and door heaters or other heat-producing components of the compressor system may have actually have been heating your walk-in, not cooling it! A Freeaire system is designed to use as little energy as possible to provide refrigeration, so it creates little heat to un-refrigerate a walk-in cooler which would freeze on its own, even without a Cool Breezetm outside air package installed. A walk-in cooler in a cold climate with three outside walls, an outside roof, little insulation, northern exposure, and no glass doors on the one remaining wall shared with a heated space is bound to freeze when the outside temperature is low. NOTE: To determine if a particular installation is likely to suffer such a fate, calculate how much heat would be lost or gained by each surface of the walk-in cooler on the coldest day of the last 100 years or so. Compare that to how much heat would be added by the Circtm circulating fan and the minimum product load. If cooling would occur even without outside air fans operating, even the Basic Freeaire system (without the outside air package) is not recommended.

#4: THE FREEAIRE SYSTEM WITH OUTSIDE AIR MAY CAUSE LOCALIZED FREEZING AND CAN DAMAGE FLOWERS AND OTHER COLD-SENSITIVE PRODUCTS. Because the outside air intake fan moves, in a concentrated stream, a large volume of air that is as cold as the outside temperature, product that is too fragile or that is stored too close and directly in the path of the incoming air may freeze. The incoming air should always be directed towards an area that is farthest away from the point of entry so as to allow time for the cold air to disperse throughout the space. The inside temperature sensor attached to the Cooler Controller should be located so that this cold air being circulated throughout the walk-in reaches it easily.

#5: WHEN USING OUTSIDE AIR, AVOID SOURCES OF POLLUTION. Do not install the air intake of a Freeaire System with the Cool Breeze outside air package where exhaust fumes from vehicles and heating appliances, or other noxious gases may be brought into the walk-in cooler. A filter can only remove so much. If the "fresh" air around the air intake is not always so fresh, the air quality inside your walk-in will suffer. An idling diesel truck parked in the wrong spot might cause so many fumes to be brought into the walk-in that uncovered or insufficiently protected food will have to be thrown away. Remember that intake air can come from an outside wall or roof either next to or far away (up to 50') from the walk-in cooler.

#6: WHEN USING OUTSIDE AIR, CHANGE THE FILTER REGULARLY. The intake air filter must be inspected and replaced as often as necessary. The cooling capacity of outside air diminishes and energy efficiency suffers as the filter becomes clogged and the fan moves less air. If the air coming into the air intake is excessively dusty, sooty, or dirty, the filter may require more attention than the one time a year the average installation requires.

#7: PROTECT THE COMPRESSOR, ESPECIALLY WHEN USING OUTSIDE AIR, The compressor system should be protected from refrigerant migration during long idle periods. It is standard good refrigeration practice for a compressor located outdoors to have a crankcase heater installed, because refrigerant tends to migrate to the coldest part of a system. Also, any compressor system should be designed as a "pumpdown" system, with a liquid-line solenoid valve. Both measures ensure that liquid refrigerant does not reach the compressor and cause damage to it. In a Freeaire system with outside air this is especially important, because a compressor is idle for such long periods of time. The Freeaire Cooler Controller replaces the thermostat in a typical "pumpdown system". It is not designed to directly control the operation of the compressor. Rather, it controls the liquid-line solenoid valve, which starts the "pumpdown cycle", which ends in the compressor turning off. By closing a liquid-line solenoid valve, the refrigerant vapor can be pumped out of the evaporator and into the condenser and receiver (which must be big enough to hold the full refrigerant charge), and the compressor operation controlled by a low pressure control. The refrigerant can thus be isolated during periods when the compressor is not operating, and migration of refrigerant to the compressor is prevented.

#8: A FREEAIRE SYSTEM WITH OUTSIDE AIR MAY CAUSE MORE DRYING OF PRODUCT IN MIDWINTER THAN A CONVENTIONAL SYSTEM. The air inside any walk-in cooler tends to become drier in the wintertime, but with the Freeaire the air may become too dry for some unpackaged or inadequately packaged product. Shrinking could occur if the product is not packaged or covered to retain its moisture.