Dear K. Chaloemsak,
>
> As per our extraction of cooling water samples from cooling towers in
> the two sites (Water based and ), kindly find the attached laboratory
> test result.
>
> The test results indicated that the cooling water in both sites are not
> suitable for cooling tower application, and according to our
> subcontractor, this will rapidly result in fouling of the heat
> exchangers of the chillers.
>
> As per our daily work report as on 10 March 16, 10 April 16, and 11
> April 16, our service team has come to sites to clean the heat
> exchangers twice, in which the chiller performance improved (chillers
> were able to perform almost to 100% load), but eventually after a short
> while, the chiller efficiency and performance will drop. We have
> currently arranged for another cleaning this Friday, in which we hope
> that Nippon Paint will also arrange for your vendor for the chemical
> cleaning for cooling water to adjust the composition of the cooling
> water to the appropriate level. The several trips to site to clean the
> heat exchangers has been causing costs to our company, and we need your
> kind cooperation to quickly send us your laboratory test reports for the
> cooling water, in which you have advised that your vendor provides every
> month, and that you will send to us some time ago.
>
> Thank you very much for your kind attention, awaiting your kind
> confirmation in return.
>
>
> Best regards,
>
> Cheng