Eko3 Systems, Inc. carbon dioxide feed systems are unique in that CO2 consumption is
reduced by as much as 50% over conventional CO2 feed systems. A booster pump is
employed to drive a mass transfer system followed by a contact chamber all of which
assure total absorption and utilization of CO2. Natural bicarbonate buffers are generated
during the mass transfer process and contact time provision. These buffers generated by
the Eko3 pH-MTS provides for pH stability.
Easy to install, automatic in it’s operation.
Powered by 110 volts and controlled by 24 VAC. The Eko3 pH-MTS feed system is easy
to install. All materials necessary for installation and hook-up are included. The pH-MTS
can be manually controlled, but, ideally will be connected to an automatic swimming
pool water chemical controller, where pH level is continually monitored and controlled at
optimum level.
The Eko3 pH-MTS feed system is connected to the pressure regulator of a single or dual
CO2 gas cylinder, or a more economical low pressure bulk liquid CO2 storage system.
Carbon Dioxide is the Natural and Safest pH control substance.
Carbon Dioxide (CO2) is the only chemical of choice for safe pH control. Carbon dioxide is an odorless,
colorless, and tasteless gas, which makes up a percent of the air we breathe. Carbon dioxide molecules
contain one atom of carbon and two of oxygen. The chemical formula for carbon dioxide is CO2.
Municipal water treatment plants use carbon dioxide for lowering pH. Innovations within the swimming
pool industry in years past have proven that CO2 does effectively replace Muriatic or dry acid for lowering
the pH of swimming pool water, as well.
Swimming Pool water treated with CO2 is much safer for bathers, and will extend the life of equipment,
and swimming pool structures. Mild carbonic acid forms when CO2 is dissolved into water. Being a
milder acid than Muriatic it is nearly impossible for even a runaway CO2 feeder to lower pool water to
dangerously low pH levels CO2 generates a natural bicarbonate buffer that makes the water more stable
and prevents the pH from fluctuating widely. With total alkalinity at the proper level, pH changes are very
gradual, making pH is easier to maintain at recommended levels.
Using CO2 to adjust swimming pool pH eliminates storing and handling dangerous acids. CO2 does not
create corrosive fumes, so it has no damaging effect on equipment or electrical panels. Unlike strong
acids, if CO2 and liquid or dry chlorine were accidentally mixed, no chlorine gas would be release. This
removes the possibility of chlorine gas formation in the re-circulation system or pool area.
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What is pH?
pH is a number used to indicate the strength of an acid or base. The number is usually on a scale ranging
from 0 to 14. A pH below 7 indicates that a solution is acidic, and a pH above 7 indicates that a solution is
basic. Strong acids have lower pH’s then weak acids, and strong bases have higher pH’s than weak bases.
A neutral solution, such as pure water, is neither acidic nor basic. Its pH is 7.
Without any outside influence, the pH of an isolated body of water will remain stable and not change.
However, swimming pool water is exposed to several things that can push pH in one direction or the
other. Some of the influencing factors include rain, make-up water, soils, sweat, urine, and chemicals such
as chlorine and algaecides. The pH numerical value represents the logarithm of the reciprocal of the
hydrogen icon concentration of swimming pool water.
When calculating swimming pool water balance, pH has a dominant influence. Higher pH values move
the balance towards the scale forming side, while lower values move the balance towards the corrosive
side.
Distributed and Serviced by:
Knorr Systems, Inc.
2221 Standard Avenue
Santa Ana, CA 92707
(714)754-4044
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pH-MTS Operations & Maintenance Manual, rev. #10/10/00
Operating instruction for the Eko3 Systems Carbon Dioxide (CO2)
Feed Device
1. WARNING!: The cryogenic, carbon dioxide, storage tank must not be allowed to run completely
out of gas. The tank must be refilled when it is 75% empty. Failure to fill the tank at this time will
result in failure of the tank-heating element.
2. The regulated pressure of the CO2 gas feed at the cryogenic storage tank must be set between twenty
(20) and thirty (30) pounds per square inch (p.s.i.), maximum.
3. CO2 gas will periodically vent from the cryogenic storage tank to atmosphere. Do not be alarmed if
and when this episode takes place. On extremely hot days the cryogenic tank-heating element may
be unplugged to minimize venting.
4. Operation of the pH-MTS CO2 Feed System is automatically controlled by the Strantrol System 4
water chemistry controller. With a rise in the pH of the water being treated the Strantrol System 4
will call for the reduction of pH by turning on the pH-MTS booster pump and opening the electric
solenoid valve within the control box of the pH-MTS system. CO2, a mild acid, will be fed through
the mass transfer system (injector) into the systems contact tank with the result being a reduction in
the pH of the swimming pool water.
5. The feed rate of CO2 at the pH-MTS feed system is to be set between 60 and 160 SCFH (Standard
Cubic Feet Per Hour). A SCFH flow meter is provided and mounted on the control box of the pHMTS feed system. The higher the feed rate the better. The compound, pressure/vacuum gauge
supplied with the system, must indicate zero (0) pressure or preferably a vacuum of 1” or greater.
Set the feed rate of carbon dioxide at the maximum sustainable, while maintaining the zero to slight
vacuum reading at the compound gauge. All feed rate settings must be made while the system is in
operation.
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