Air Curtain FAQ & Troubleshooting Guide

FAQ

Mounting & Installation

When Would A Vertical Mount Be Feasible?

When installation is not possible over the top of the doorway some Mars Air Curtains may be vertically mounted on either side of the door, blowing across the door opening; this type of installation must be specified at time of order. The pan of the motor/fan assembly will be bolted to the air curtain housing instead of the standard wing nut mount hardware. All motors used in Mars Air Curtains contain thrust bearings and operate efficiently in any position. 

Where Are The Junction Boxes?

Each motor within the air curtain housing will have one watertight junction box mounted internally. Contact factory for specific location. If specified at time of order, the junction box can be located elsewhere.

How Does The Air Curtain Mount Over A Large Warehouse Roll-Up Door?

Mars provides a variety of optional mounting hardware accessories. Side extension plates are available to further extend the outboard mounting hole on the STD, HV, and EP models when being used to clear existing lines and tracks over a doorway. These plates are available in various sizes up to a 9” extension for both ends of the air curtain. Adjustable mounting brackets and extended wall mount brackets for drum type roll-up doors are also available; these types of brackets are used when the air curtain needs to be mounted some distances away from the wall. The brackets are available in various sizes to provide 2 ½” to 23” of clearance. Please consult factory for details.

When There Is A Foyer, Where Should The Air Curtain Be Mounted?

To be most effective, the air curtain should be mounted inside the foyer over the building entrance door. Depending upon climatic conditions, either a heated or unheated model may be used.

Should The Air Curtain Be Mounted Inside Or Outside The Doorway?

 

Generally, air curtains will operate with equal efficiency, regardless of which side of the doorway it is mounted on. However, there are certain exceptions, as follows:

  1. Either side of the door opening is acceptable when used for insect control or over refrigerated coolers.
  2. Outside installation is required when used over freezer doors because when mounted inside, the fans tend to gather moisture and freeze, eventually forming a snowball around the fan, causing it to lose operational efficiency.
  3. Inside installation is mandatory when used as a thermal barrier in factories, stores, etc., to prevent loss of heat and keep out the cold air.
  4. Heated units must always be mounted inside.
When An Air Curtain Is Mounted Over A Cooler Doorway, Can The Door Itself Be Removed And The Air Curtain Allowed To Operate Continuosly?

No. Air curtains provide up to an 80% thermal efficiency level. The continual loss of refrigerated air and build-up of humidity within the cooler will cause the compressor to burnout. Air Curtains are meant to be used as an energy saving device when the cooler door needs to be opened for loading and unloading purposes.

How Do You Clear Existing Lines And Tracks Over A Doorway?

Mars provides a variety of optional mounting hardware accessories. Side extension plates are available to further extend the outboard mounting holes on the STD, HV, and EP models. These plates are available in various sizes up to a 9” extension for both ends of the air curtain. Adjustable mounting brackets and extended wall mount brackets for drum type roll-up doors are also available. These types of brackets are used when the air curtain needs to be mounted some distances away from the wall. The brackets are available in various sizes to provide 2 ½” to 23” of clearance. Please consult factory for details.

How Do You Mount A Mars Air Curtain Over A Meat Track That Comes Out Through The Center Of The Door Opening?

Sometimes one unit can be installed over the door opening on top of the track, but very often there are obstructions and the unit would have to be installed much too high. Therefore, one unit on each side of the track would be more efficient because installation is then closer to the top of the door opening. The air curtain should be mounted 3” to 4” away from each side of the track to prevent interference with products being sent through.

How Long Does It Take To Install A Mars Air Curtain?

The average time required to install a unit is two hours. After the second or third installation, the time can usually be cut to one hour.

Do Mars Air Curtains Require A Cover When Mounted Outside?

No, they are not normally required as their design protects them from inclement weather. Weatherproof covers may be recommended when the units are exposed to harsh environments or excessive moisture. All unheated units are ETL/UL listed for outdoor use.

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