Evaporative Cooling Maintenance

Regularly scheduled maintenance is the key to peak performance, minimized cost, and extended life of the evaporative cooler. The following is a checklist of items that need to be looked at on a regular basis.

1.The media should be checked for mineral and foreign material deposits that have built up. If these items are left on the media, the life and performance of the unit will be greatly reduced. Also, there are risks of water carry over when this type of condition exists. When signs of mineral build-up are noticed, you should increase the bleed off rate. If this does not solve the problem, chemicals may need to be added to the water. The evaporative pads tend to be self cleaning. Depending on water quality and system maintenance, the useful life of the pads should be 3 to 5 years.

2.The media should be periodically brushed lightly with a soft bristle brush in an up and down motion (never brush side-to-side) while flushing with water. This will also aid in reducing the amount of foreign material build-up.

3.The water should be shut off and all the lines drained when the temperature drops below 50°F.

4.When the evaporative cooler is going to be used for the first time each season, it is recommended that the media be flushed with clean water for a period of 2 minutes (see Evap Module Start-Up on page 7).

5.At the beginning of each cooling season, the upright recirculating pump should have the shaft oiled and spun to eliminate the potential of seizing and pump burn out.

6.If the cooling media was removed from the unit, check to make sure that is not installed backwards. If the media is installed backwards, there will be large amounts of water carry over downstream of the evaporative cooler.

Continuous operation in this manner may cause serious damage and void the warranty.

7.At the end of each cooling season the evaporative cooler should be thoroughly cleaned. A dispersant and biocide (consult water treatment consultant for suitable materials and dosage levels) should be recirculated for 12 to 24 hours prior to performing the following steps:

a)Disconnect power to unit.

b)Shut off all water to the unit

c)Open evaporative cooling section door

d)Flush distribution headers and media for 20 minutes

e)Turn off pumps and drain all water distribution piping, headers, etc.

f)Dry media completely by running blowers.

g)Brush media as described in Paragraph 2 and perform steps d and e again.

h)Clean all remaining components (i.e. sump, pump, etc.) of any mineral deposits or foreign materials

i)Replace all worn or non-functioning parts

j)Reassemble the cooling unit.

k)Close cooling section door.

l)Turn the main disconnect 'ON', leaving the cooling switch in the 'OFF' position.

8.If the evaporative cooler will be turned off during the cooling season for an extended period of time, it is recommended that the media be dried out. This can be accomplished by allowing the blowers to continue to run for 1-2 hours. Doing so, will prevent organic build-up on the media and subsequent odors getting into the space.

9.Media should be permitted to dry once per week by allowing the blowers to run for 1-2 hours.

10.A flush cycle should be performed weekly for one hour with the fans off.

HRE-55, HRE-45, HRE-90, HRE-20 specifications

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