[labnetwork] cleaning procedure for chillers

[Saba Sadeghi]

Dear all,

Thank you for your recommendations. They were all very helpful.

Best,
Saba
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From: labnetwork-bounces at mtl.mit.edu <labnetwork-bounces at mtl.mit.edu> on behalf of Stephen Howe <info at fabsurplus.com>
Sent: March 1, 2021 5:50:43 AM
To: N Shane Patrick; James Mitchell
Cc: Fab Network
Subject: Re: [labnetwork] cleaning procedure for chillers

Dear All,

To avoid algae growth, it is very important not to use transparent chiller hoses. Also, make sure the lid of the chiller is closed, to stop light from getting in.
It is the presence of light which encourages the growth of organics in your chiller water.

I have encountered people who had to scrap several really expensive RTP tools, due to the cooling circuits were blocked with organic gunk.



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On Sat, 2021-02-27 at 09:34 -0800, N Shane Patrick wrote:
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<mailto: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<mailto:saba.sadeghi at uwaterloo.ca>

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