Advanced Radiant Systems Cool-Space CSW-12-VD Owner's Manual - Page 12

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CHEMICAL BURN HAZARD

POISONOUS GAS HAZARD

Serious injury or death may

•

occur.

Read, understand and follow

•

all chemical manufacturers'

instructions when using the

chemicals noted in these

pages.

Algae/Bacterial Control

Control with chemicals.

commonly used chemical to control organisms.

potentially dangerous and should be used with great

caution. One of the best methods to introduce chlorine

into the water circulation system is on the pressure side

of the pump on a continual or timed basis.

Note:

Consult

water

attempting chemical water treatment.

manufacturers'

nor

warranties cover damage due to chemical water

treatment and warranty may be voided when chemicals

are used.

Other chemicals suitable for organism control include

hydrogen peroxide, bromine based oxidizers, and other

commercial products. It is important to maintain a 6 to 9

pH level after treatment.

Control without chemicals. With water, sunlight, and

nutrients, most organisms can survive. The water in the

media can be allowed to dry out and any organisms

living in the media will become dry and flaky. This can

then be flushed out at the next start up of the unit.

Shading the media will prevent the sunlight from

encouraging the growth of organisms. Nutrients are

available from the air itself, however in some instances,

phosphates and fertilizers are carried in the air stream

and should be avoided.

Flushing the media with fresh water and dumping

the sump water periodically is the best preventative

measure that can be taken.

This flush and dump action will actually prevent alkali

deposits and algae/bacteria from growing. There are

also some non-recirculating water distribution systems

available that provide a constant flushing/dumping

action.

Page 11 of 16

Chlorine is the most

treatment

experts

before

Neither media

equipment

manufacturers'

MAINTENANCE

Hard water contains relatively large amounts of

minerals, primarily calcium. A sample of water can

contain only a specific maximum amount of dissolved

solids in solution.

beyond a certain level, the excess minerals precipitate

out as a solid material. This precipitation will appear

as the familiar white residue left on the face of the

media. It is commonly referred to as alkali, calcium

depositions or salts. The same process occurs in the

desert when water collects in depressions and since

only pure water evaporates the minerals are left

behind. These are commonly referred to as "dry

lakes" or "salt flats".

The build up of these minerals on the face of the

media does not because a problem until the airflow is

restricted.

It is

deposits.

preventive rather than corrective action and usually

requires simple actions such as media flushing with

fresh water and periodic dumping of the sump water.

Soft water is on the opposite side of the scale for

water

chemistry

Basically, removing or diluting the effects of the

calcium in the water creates soft water. Soft water is

not to be confused with pure water. Pure water does

not contain or contains very small amounts of

minerals found in either hard or soft water.

hard water can leave deposits in the media, soft water

can cause harm to the media by leaching out the

rigidifying agents.

some adverse effects on the media.

PH Range. A pH range of 6 to 9 is the acceptable

range for the media, the closer to the center the

better.

The re-circulating system of the water

distribution allows the mineral content in the sump

water to become more and more intensive because

the same water is re-circulating. The pure water is

lost to evaporation while the minerals just continue to

build up. TDS is the abbreviation for "Total Dissolved

Solids" and represents, as the name implies, a way of

identifying a measurement of the mineral content.

Water Chemistry

If these concentrations increase

There is no easy way to remove these

The best solution to this problem is

compared

Either water condition can have

hard

water.

While