[labnetwork] cleaning procedure for chillers

[N Shane Patrick]

We have a haskris chiller on a JEOL SEM and the agreed procedure is to add a bottle of drug store peroxide to tank, let it run normally, no isolation, overnight or so, then drain, flush, and fill and return to service. Algae is usually our biggest issue, and this is more than enough to handle it. I suspect most anything will hold up fine to the dilute peroxide solution. I have other chillers and systems where CLR has been used for other types of clean out.

-Shane

Sent from my iPhone

> On Feb 27, 2021, at 9:10 AM, James Mitchell <jtmitch5 at ncsu.edu> wrote:
> 
> 
> I have used CLR to clean out cooling lines but you would want to flush it out afterwards. Mix the CLR with water and drain out after cycling. There are biocides you can add to cooling water to keep it clean.
> 
> Jim
> 
>> On Fri, Feb 26, 2021, 3:42 PM Saba Sadeghi <saba.sadeghi at uwaterloo.ca> wrote:
>> Dear colleagues, 
>> 
>> We have chillers from Haskris for cooling our MBE deposition system and also XRD system; I was wondering if you have a procedure that you recommend for cleaning the chillers' water. According to Haskris you can use hydrogen peroxide to clean the water should there be any biological growth in the chiller. For this, do I need to isolate the chiller from the system or can hydrogen peroxide be run through the entire system?
>> 
>> I appreciate your input.
>> 
>> Best,
>> Saba
>> --
>> Saba Sadeghi, PhD
>> Quantum Devices Fabrication Scientist
>> Institute for Quantum Computing, University of Waterloo
>> Email: saba.sadeghi at uwaterloo.ca
>> 
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