AOLAN Indirect Evaporative Air Cooler with Celdex Pad or with Evaporator

 

Does a Window Have to Be Open When Running an Evaporative Cooler?

Evaporative air coolers can lower room temperatures as much as 30 degrees. Forcing fresh air over damp fabric to cool a space is one of the oldest methods of air conditioning. It is easy and effective in dry climates. Even though the principle is simple, you may have questions about how evaporative cooling systems should be run.

Fundamentals

· Air conditioning cools and recalculates air in a room or in an entire building. It is essential to keep the windows closed so the cooled air does not escape. However, evaporative coolers work differently. They pull fresh air into a room, and as it passes over damp pads, it cools the room. As the cool air fills the room, the hotter air is forced out. With really efficient evaporative cooling, a total air change in the space can take place every two minutes.

 Varieties

· Evaporative air cooling systems can cool an entire dwelling or a single room. The room units are often placed in windows, not unlike window air conditioning units. In larger systems, duct work and fans together move air throughout the space to allow cool air to enter each room. A simple system uses one duct and fan setup to let in air and blow it into the house.

 Balance

· The purpose of opening a window is to let the warm air escape as the cooler air is circulated by the evaporative cooler's fan. Open the door and a window inside any room you wish to cool so the air can move through. To get a balance of cool air throughout the space, leave both a door and window open in the room to allow air to circulate.

 Adjustment

· How much you open a window can determine the evaporative cooler's efficacy. Open the window just enough so the door closes very slowly. This means the pressure is balanced, and the hot air is moved through the window as exhaust. If the door slams, the window is not open wide enough. However, don't open the window too far. If the door does not move, the window is too widely open. When the door closes completely, open it and start the process over.

 

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How to clean greenhouse evaporative cooling pads

You can clean evaporative cooling pads for reuse in a greenhouse cooler. Clean reusable cooler pads to improve the efficiency of the greenhouse cooler. 

Follow the steps below to clean greenhouse evaporative cooling pads.
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How much cheaper is a evaporative air cooler vs. central air conditioning?

When evaluating the costs of any heating or cooling system, consider these two separate factors: 
1.the initial purchase price 
2.installation cost

An evaporative air cooler is often touted as a less expensive alternative to central air conditioning. Weigh the pros and cons of each to determine which is truly the better bargain and most effective system for your home.

Window-mounted evaporative air coolers
Evaporative air coolers for residential use are usually small, window-mounted appliances -- sometimes called "window units" -- that can be installed one to a room. 

Roofed evaporative air coolers

Energy costs

A key consideration when weighing the costs of central air against individual evaporative units is the energy usage involved in operating each. 

aolan evaporative air cooler

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Aolan Liquid desiccant air conditioning working flow-chart 

How to Treat Water in a Swamp Cooler

  An evaporative cooler, often referred to as a "swamp cooler," is an air conditioning alternative that uses a water pump and water-soaked padding in a boxed frame to channel and cool outdoor air through a fan that delivers the cooled air indoors. It is most functional and healthy in dry, non-dusty and unpolluted atmospheres. However, these coolers must be properly maintained and treated for mineralization and the proliferation of bacteria and fungi that can occur in the water supply. 

 Instructions:

 1.Consult your Owner's Manual prior to any treatment to review the maintenance and treatment guidelines recommended by the manufacturer.

 2.Turn off and unplug the cooler unit. Turn off the water supply and drain the cooler unit via the drain plug.

 3.Clean the water tank by rinsing it with mild, soapy water and drain the cooler unit via the drain plug. If recommended by your Owner's Manual, place water treatment tablets and/or zinc anodes in the water pan to control corrosion, mineralization, and bacterial and fungal contamination.

 

Evaporative air cooler

 4.Refill the cooler unit's water supply, reassemble the cooler unit and restart the system.

 Tips & Warnings

 Besides a combination of soap and water, water treatment tablets and zinc anodes, there are other cleaning solutions available, such as bleach and chlorine, to maintain a clean evaporative cooler unit's interior and to treat the water supply.

The treatment methods described above are general recommendations and may not be suitable or most appropriate for your evaporative air cooler unit.

How to Fix evaporative air cooler

You may have to change the fan motor to fix the water cooler.

Water coolers, or evaporative air coolers, are also known as swamp coolers in the hot dry areas where they operate most effectively. The design is simple: A fan forces outside air through fiber filters that are kept wet with a water curtain that is pumped and distributed from a reservoir in the bottom of the unit. The water cooler is composed of several major components, including an electric motor, water pump, a fan blade cage and a reservoir water control float. The water cooler is fixed by replacing or adjusting these individual components as they present problems.

Instructions

1

Condition the water reservoir by opening the drain plug at the bottom and on the side of the unit to drain the water from the reservoir, and scrub the reservoir with a wire brush to remove all scale buildup and debris. Wipe the reservoir clean of all debris.

2

Paint the inside of the reservoir by following label directions on special water cooler paint, available at hardware stores, and allow it to dry.

3

Fill the reservoir to the water level mark on the inside of the unit, and follow label directions to pour special scale remover treatment, available at hardware stores, into the water in the reservoir, which will remove scale and improve water flow in the pump and the water distribution system.

4

Replace the pump by unplugging it and disconnecting the plastic water tube. Place the new pump into the new net filter bag, connect the new plastic tubing with a plumber's clamp to the pump and plug it in.

                             Evaporative air cooler

5

Install a new water distribution system known as the spider because of its central black hub and eight curved water tubes branching out from it. Remove the hub by unscrewing the nut that attaches the central hub to the top of the unit.

6

Cut the new water tubes to the same size as the existing ones; glue the tubes in the holes of the new hub with PVC glue, available at hardware stores, and use the bolt to attach the hub to the top of the cooler unit.

7

Change out the old fan motor by using a crescent wrench to remove the bolt in the motor slide mount, take off the fan belt and remove the existing motor. Place the new motor in the slide mount, place the new fan belt on the flywheel and adjust the position of the motor on the mount to apply adequate pressure so the fan turns easily without producing a high squealing noise which indicates the belt is too tight.

8

Remove all mineral deposit buildup from the inside of the unit to keep water flowing freely, by scrubbing the water troughs and water distribution ports with a stiff brush and white vinegar. Cooling efficiency is determined by how much water is evaporated when it runs through the filters.

9

Use a toothbrush to scrub the float mechanism with white vinegar to remove buildup so the balance arm can move freely. If necessary, replace the float assembly. Adjust the float ball, much like the float ball in a toilet tank, by bending the float arm to a position that will stop the flow of new water just below the top of the drain tube that sticks up from the bottom of the reservoir floor.

Proper Ducting for Swamp Coolers

   Evaporative air coolers are also known as "swamp coolers," a system for homes and buildings which emits moisture to keep the air cool. This method of cooling is popular in the dry climate of the Southwestern United States. Existing ducts for conventional heating, ventilation and air conditioning may work for swamp coolers depending on the size of the premises. For efficiency, you may need to enlarge the ducts or reduce them to a window opening depending on the cubic feet of the area and size of the cooling unit. 

   Swamp coolers need more volume of air flow than a conventional air conditioner because swamp coolers produce warmer air supply. The ducting system should handle the increased volume of air blown into the house. First you need to determine the right cooler. Divide the cubic feet of space you want to cool by two for the required cubic feet per minute of air blown into your home to determine the right cooler. The formula for a 1,500 square foot home with ceilings 8 feet high calculates as 1,500 x 8 = 12,000 cubic feet and then 12,000/2 = 6,000 cfm. You will need a swamp cooler with 6,000 cfm. For coolers 4500 cfm or smaller, use 18" ducts, 20" for up to 5500 cfm and 24" for 6500 cfm.

   Installation

   Homes with hallways and multiple bedrooms require duct installation for swamp coolers.Installers commonly used down-flow swamp coolers on roofs to flow through ducts. Flowing air through ducts from ground-mounted horizontal units makes maintenance easier with less risk of leaks on the roof.

   

Swamp Cooler

   Security

Opening or closing windows regulates the temperature and humidity. Installing up-ducts in the ceiling will properly duct the area where opening windows could present a security issue. Up-ducts release warm air into the attic and allows the cool air from the swamp cooler in. You may need additional attic ventilation for this method of duct installation.

   Small Units

Swamp coolers depend on dry, outside air. During hot and muggy weather, the coolers blow in hot, humid air which can emit a musty odor through the duct work into the house. Small premises have the advantage of installing a small unit in a window to blow cooled air directly into a room. Compact houses might not require ducts and can keep cool with central-location installations.

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Swamp Cooler Roof Installation

Swamp coolers are an energy-efficient alternative, particularly in low-humidity areas.

Swamp coolers -- or evaporative coolers -- utilize the natural cooling properties of evaporating water to cool the air inside homes. They function by pulling outdoor air over water-saturated cloths or pads and circulating it through the home. Swamp coolers are an energy-efficient alternative to traditional air conditioning and function particularly well in low-humidity areas. Installation requirements vary depending on the model of cooler you choose, the type and condition of your roof and the duct work in your house; however, there are several steps that apply to all installations. Have a question? Get an answer from a handyman now!

Instructions

1

Find a location on your roof for the cooler. For aesthetic reasons, you may want to locate it on the back of your roof. Swamp coolers blow cool air into a central location through a diffuser or into duct work, which distributes the cool air into different rooms in the house. Therefore, another consideration is proximity to the duct work or diffuser to which you will connect the cooler. Location of roof trusses are another important consideration as you will need to cut a hole in the roof for duct work and you do not want to cut through a truss. 

2

Determine where your cooler will distribute air through the house and install a diffuser in the ceiling at that location or locations. The simplest installations call for a single diffuser located in a central hallway beneath an attic.

3

Cut a hole in the roof. Most evaporative air coolers require either 18-by-18 inch or 20-by-20-inch duct work. Refer to your cooler's literature for the correct size. Make sure the hole is between roof trusses. Frame out the hole with additional two-by-fours between the trusses.

4

Run electrical wiring from the roof to your electrical panel. Run ¼-inch copper or plastic tubing from the roof to a cold water supply line in your house. Make sure there are no low spots that will hold water when the unit is turned off.

5

Run duct work from the diffuser or diffusers that you installed earlier through the hole in the roof. This will require rigid ducts, flexible ducts or a combination of the two. Strive for as direct a route as possible. Check all plumbing, electrical and duct work connections before running the cooler.

Evaporative air cooler roof installation

6

Install metal flashing between the duct work and the roof. Bend the 4-by-4-inch flashing on a 90-degree angle. Remove the shingles around the duct work, screw the flashing to the duct work and replace the shingles over the flashing.

7

Build a platform or support system for the cooler to sit on. You can either use roof jacks or construct a platform with pressure treated or weather treated wood. Consider the pitch when choosing an option. Also, make sure that you will be able to connect the cooler to the water supply, electrical line and duct work when it is on the platform.

8

Place the cooler onto the platform and connect the water supply, electrical line and duct work.

How to Fix Water Coolers

    You may have to change the fan motor to fix the water cooler.

    Water coolers, or evaporative air coolers, are also known as swamp coolers in the hot dry areas where they operate most effectively. The design is simple: A fan forces outside air through fiber filters that are kept wet with a water curtain that is pumped and distributed from a reservoir in the bottom of the unit. The water cooler is composed of several major components, including an electric motor, water pump, a fan blade cage and a reservoir water control float. The water cooler is fixed by replacing or adjusting these individual components as they present problems.

    Instructions

    1.Condition the water reservoir by opening the drain plug at the bottom and on the side of the unit to drain the water from the reservoir, and scrub the reservoir with a wire brush to remove all scale buildup and debris. Wipe the reservoir clean of all debris.

    2.Paint the inside of the reservoir by following label directions on special water cooler paint, available at hardware stores, and allow it to dry.

    3.Fill the reservoir to the water level mark on the inside of the unit, and follow label directions to pour special scale remover treatment, available at hardware stores, into the water in the reservoir, which will remove scale and improve water flow in the pump and the water distribution system.

    4.Replace the pump by unplugging it and disconnecting the plastic water tube. Place the new pump into the new net filter bag, connect the new plastic tubing with a plumber's clamp to the pump and plug it in.

    5.Install a new water distribution system known as the spider because of its central black hub and eight curved water tubes branching out from it. Remove the hub by unscrewing the nut that attaches the central hub to the top of the unit.

    6.Cut the new water tubes to the same size as the existing ones; glue the tubes in the holes of the new hub with PVC glue, available at hardware stores, and use the bolt to attach the hub to the top of the cooler unit.

    

water cooler

    7.Change out the old fan motor by using a crescent wrench to remove the bolt in the motor slide mount, take off the fan belt and remove the existing motor. Place the new motor in the slide mount, place the new fan belt on the flywheel and adjust the position of the motor on the mount to apply adequate pressure so the fan turns easily without producing a high squealing noise which indicates the belt is too tight.

    8.Remove all mineral deposit buildup from the inside of the unit to keep water flowing freely, by scrubbing the water troughs and water distribution ports with a stiff brush and white vinegar. Cooling efficiency is determined by how much water is evaporated when it runs through the filters.

    9.Use a toothbrush to scrub the float mechanism with white vinegar to remove buildup so the balance arm can move freely. If necessary, replace the float assembly. Adjust the float ball, much like the float ball in a toilet tank, by bending the float arm to a position that will stop the flow of new water just below the top of the drain tube that sticks up from the bottom of the reservoir floor.

  

How to Remove an Evaporative Cooler

    Evaporative air coolers eventually wear out and need to be removed. Remove your evaporative cooler when the water basin has rusted through, or the cooler housing no longer safely supports the roof and panels of the cooler. Evaporative or swamp coolers are bulky and awkward and so you should seek the assistance of two or more people when removing one. Their help can minimize the chance of you straining or injuring yourself. If you don't feel qualified to attempt this task, contact your local HVAC company for removal assistance.

   Instructions

   1 .Unplug the power cord of the evaporative cooler from its power outlet.

   2.Remove the side panels of the evaporative air cooler. Put your fingers in the handles and then lift up, pull out and slide them down. Removing these will make the cooler lighter and easier to carry.

   3.Twist the water basin drain plug counterclockwise and allow all of the water to drain from the cooler. Use your hand to untwist it.

   4.Undo the water supply line. This line attaches to a nipple on the float assembly. Just pull it off the nipple with your fingers.

   5.Have two people hold the swamp cooler to support its weight. They can hold the sides or bottom of the cooler.

   6.Open the window if the air vent of the cooler feeds through it.

   7.Undo any bolts, screws or chains that hold the evaporative cooler to the structure. Use a crescent wrench to undo the bolts and a Phillips or flat-head screwdriver on any screws. The chains will have hooks on the ends that unhook from soffit- or wall-mounted hooks.

  

   8.Pull the air vent side of the cooler out of the structure. Lift straight up if removing from a roof. Lift straight out if you're removing it from a window or wall.

   9.Run a long chain through the housing of the cooler and hook it back to itself above the cooler roof. Do this if you have to lower the chain from the roof to the ground. Ensure nobody is beneath the cooler while lowering it.

  10.Set the evaporative cooler in the back of a pickup truck and replace the side panels. Give the cooler away or haul it to your local metal recycling center.

How to Connect a Two-Speed Evaporative Cooler

   Evaporative coolers are a popular alternative to traditional air conditioning units in low-humidity areas of the country. They work on the same principles of thermal heat transfer as our bodies do. By adding moisture to the air, the units create an avenue for heat to be removed during the endothermic evaporation process. The installation of an evaporative unit usually takes place on a roof or in an upstairs window, as the moisture-laden water is heavier than the untreated air and falls to the lowest levels of the home. 

   Instructions

   Roof Installation

   1.Install the roof mounting bracket. Place the bracket directly over the venting that you will be attaching it to. Drive the mounting screws that come with the bracket into each of the four corner mounting slots. The bottom of these slots is cushioned with a rubber gasket that seals the hole, so no additional sealant is necessary. If obstacles make it impossible to mount the bracket directly over the venting, place it as close as possible up-slope from the vent.

   2.Cut a hole in the roof with a reciprocating saw where indicated by the roofing bracket.

   3.Hoist the evaporative air cooler to the roof. This will require either a small crane or hoist, which can be rented at a local equipment dealer or home improvement store.

   4.Attach the mouth of the evaporation unit to the existing ventilation system with a metal collar. Tighten this collar with the screw tightener on the outside of the collar.

   5.Install flashing around the vent pipe and seal it with roof sealant.

   Window Installation

   1.Locate the studs in the wall beneath the window you will be installing the cooler in with a stud finder.

   2.Attach the window mounting brackets that came with the unit with 2-inch screws.

   3.Screw down the mounting platform on the mounting braces.

   4.Set the unit on the platform and fill in any gaps in the window with Styrofoam board.

   Hooking Up Water and Electric

   1. Run the water line from the piping inside of the attic to the roof-mounted cooler before adding flashing. When connecting the pipes, make sure to add thread tape to the threading to prevent leakage. Window coolers are more difficult to link to an internal water source and often have to be filled periodically with a bucket.

   2.Hook the electrical line of the roof mounted unit to an internal switch. For a two-speed evaporator, get a three-way switch and wire it into a convenient location in the home. For a window unit, this is not necessary, as the switch is located on the front of the machine.

   3.Check the overflow reservoir and the drainage pan of the unit every few days to make sure that they are working properly. Also check the seal around the newly installed vent to make sure there is no leakage.

How to Build a Greenhouse Evaporative Air Cooler

   Greenhouses require a great deal of work but offer the reward of nourishing and delicious vegetables. A greenhouse evaporative cooler removes heat and moisture from the greenhouse so that it does not become too hot for the plants and vegetables. Evaporative coolers can be purchased at stores, or you can make your own. A good homemade evaporative cooler should lower the temperature in a greenhouse by 10 to 15 degrees. They are mostly used in areas where the temperature in a greenhouse can exceed 115 degrees Fahrenheit. A homemade evaporative air cooler pumps water through a pipe, then spreads cooled air through the greenhouse using a fan with a filter.

   Instructions

   1 Cut around the edges of the filter pad so that it fits entirely over the front of the box fan.

   2 Drill a hole in each corner of the fan and attach the filter over the fan with screws. It should fit completely without being loose.

   3 Drill a hole in the side of the fan that is large enough for the perforated PVC pipe. Push about half an inch of the PVC pipe through the hole and glue around the outside rim of the pipe where it is inserted into the fan. Let it dry completely.

  4  Fill a small garbage can three-fourths full of water. Submerge the pump and attach the other end of the PVC pipe to the pump.

  5  Place the fan on a small table. Place the garbage can next to the table on the floor next to the box fan. Turn the pump and the fan on to cool the greenhouse.

Evaporative Air Cooler Tips

An evaporative cooling system has a lot of benefits in low-humidity climates over traditional air conditioning systems. Evaporative air coolers supply cool air into a house through evaporation of water. These coolers cool the outdoor air by 15 to 40 degrees Fahrenheit by passing the warm air through the pads that are saturated with water. The cool air is forced into the house, as the warm air is pushed out the open windows. These coolers are extremely affordable and use up to 75 percent less electricity, compared to air conditioning systems. 

Sizing Tips

When purchasing your cooling system, you must ensure you find the appropriate size. Calculate the cubic feet per minute (CFM) of your home. CFM is the cubic feet of air that is in the house and the volume of air that is needed to replace it in one minute. Multiply the length by the width by the height of the home. Divide this number by two. Commonly, this number will be in between 3,000 to 6,500 square feet. Select a system that matches this number (3,000 to 6,500 CFM). Additionally, if you have certain allergies or find dust particles annoying, invest in a system that contains a filter.

Safety Tips

     You must abide by certain safety tips and guidelines to prevent harming yourself. When working on the evaporative cooling system, ensure the electrical power is turned off and the system is unplugged. Wear rubber shoes, protective gloves and goggles when performing maintenance. Never work on your cooling system in poor weather conditions.

Maintenance Tips

     It is imperative that you perform a complete and thorough investigation each spring. Bring a pen and paper with you when you go onto the roof to inspect the evaporative air cooler. Look over the components and ensure they function correctly. This includes checking the pump, motor, pads and float valve. If anything needs to be replaced, write down what it is and what size it is. Try to get every piece of information you can, as this will save you additional rooftop excursions. Depending on the hardness of the water, removal of any mineral and sediment deposits needs to be done on a regular basis. You need to perform these tasks again at least once before the season ends, preferably once each month.

Cleaning Tips

     Do the cleaning when you do the maintenance. You must clean the cooler out in its entirety at the beginning of the season, then again when the season ends. You must check the reservoir, pump, pads, and filters once each month, at minimum; thoroughly clean each item. Lastly, replace the pads twice each season. Make sure you take the appropriate safety measures and that the system is unplugged.

Window Tips

      You must make sure the windows within your home are open at least a forth of the way. If you do not do this, the warm air will not be able to get out, as the cooler air enters the room. The amount a window is open will control the temperature and humidity for that room. Simply close the window to any room that does not need cooling. Minimize the heat from these windows by utilizing heat absorbing film or adding blinds to them. You should also employ reflective film and windows, if budget allows.

Definition of Evaporative Cooling

    Evaporative cooling is becoming increasingly relevant as energy costs continue to skyrocket, because it can be up to 80 percent more efficient than classic refrigeration or absorption air conditioning. Evaporative cooling is simply cooling of air or anything else by the evaporation of water or other liquids. It is easy to illustrate by merely pointing out the effectiveness of perspiration cooling, the human body's own built-in evaporative cooling system. Evaporative cooling works best in warm, dry climates such as is found in the Southwestern United States.

Latent Heat

    Evaporative cooling in a coffee cup.Whether from a boiling pot or a wet towel, water takes about the same amount of heat to vaporize, or turn from a liquid, a lower energy state, into a gaseous form, a higher energy state. This is called the latent heat of vaporization, and the heat source is any material or space from which or in which the vaporization takes place.

Preferential Environments

    Dry air has a particular affinity for moisture because water has such a low partial pressure due to water, and it is relatively easy for molecules of water that are moving rapidly to be absorbed by the dry air and assumed in a gaseous form. This is why the visible spires of water vapor rising off a hot cup of coffee disappear only several inches above the cup. Therefore, evaporative cooling is far more effective in dry locales, such as deserts and prairies, as opposed to tropical and subtropical climate zones, such as Florida.

Perspiration

    There is nothing quite like a brisk breeze on a hot day, because more strident air movement presents perspiring skin with a much higher volume of air with an affinity for water. Ceiling fans provide even and steady air movement, which is often just enough to keep diners or sleepers in tropical climes cool and comfortable. Dogs pant on a hot day because they only perspire through their tongues, and the panting or rapid breathing instinctively increases the amount of air passing over the tongue, which absorbs the water that causes the evaporative cooling.

Nature's Cooling

    Trees evaporate enormous amounts of water into the air through their leaves, which is why many vacationers prefer a cool stroll through a dense, tall forest on a hot sunny day to a walk on a beach.

Direct-Indirect Cooling

    The only downside to evaporative air  cooler  is that the air becomes more humid as it is cooled, which can be a trade off on a hot, muggy day. For this reason, indirect systems evaporate water outside of recirculating air ducting, so that a portion of the heat absorbed comes from the living quarters, without the added humidity, which is subsequently exhausted outside.