EcoWater CHC Series, Руководство по обслуживанию и устранению неисправностей

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6.12 CSR Form (Blank)
The CSR forms for each account are specific to that account. Please request the appropriate forms
from EcoWater CHC Service.
6.13 Procedure for Chemical Passivation
In order to chemically passivate a cooling system, an inhibitor (WR-6035) will need to be added and
the pH of the system controlled between the range of 6-7. In order to accomplish this, EcoWater CHC
uses a Walchem pH/Conductivity controller. Water from the cooling system flows across the probes
for conductivity and pH, after which citric acid (first) and WR-6035 (second) are injected. The
discharge from the injectors returns directly back to the sump. Two chemical pumps will be used to
inject WR-6035 (EZB10D1-VE – Clear Plastic) and the citric acid (EZB10D1-TC – White Plastic).
The citric acid pump should be plugged into the electrical pigtail labeled “pH” off the controller, while
the WR-6035 pump will be put on a slow continuous feed.
In order to get started, the pH probe and the conductivity probe must be calibrated. Refer to the
Walchem manual on how to perform calibration. In order to calibrate you will need pH 4 and pH 7
standards for the pH probe and a bottle of “One Shot” calibration solution for the conductivity probe.
Once calibrated, the range for pH control needs to be programmed. It is recommended that the upper
limit be pH 6.8 and set the span for 0.4, which will shut off the acid pump when the pH gets below 6.4.
We recommend operating the system at < 2.0 cycles of concentration based upon the conductivity of
the make up water. Consult the Walchem manual on how to set these parameters.
Prior to starting the passivation process we recommend you blow down the system to well below the
conductivity set point so when you start adding chemicals they do not immediately trigger a blowdown.
Pictures of the tubes (condenser) or basin (cooling tower) should be taken prior to passivation and then
again after. The process is successful if the color of the galvanized metal goes from a shiny aluminum
to a dull gray color.
At start-up, you will need to prime the chemical pumps with the respective fluids; consult the pump
manual on how to do this. Once you are ready to go you will need to have available a WR-6035 test kit
and should have 1 gallon of Antifoam AF in case foaming becomes an issue. The test kit will have the
procedure on how to determine how much WR-6035 is in the system. Should foaming be an issue, you
will need to pour in 8 ounces of antifoam at a time into the system in order to kill the foam (a little anti-
foam goes a long way).
The controller will bring the pH of the system in line automatically. As stated earlier, the acid pump
(EZB10D1-TC – White Plastic) gets plugged into the “pH” electric pigtail on the controller. Typically
a good setting for the acid pump speed will be 300. You will need to put in a slug does of the WR-
6035 to get the residual into the 40-100 ppm range. This can be accomplished by turning the pump up
to a speed setting of 325 and let it run for about 10 minutes, and then pull a water sample to run the
WR-6035 test. The WR-6035 pump (EZB10D1-VE – Clear Plastic) should be plugged directly into a
power outlet so it can run continuously. Once you get into the recommended WR-6035 dosage range