Monthly Archives: July 2017

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500kw Process Chiller Installation

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Just been and had a look at a job to install and commission a process chiller. We are the dealer for Hitachi chillers: the most robust and well built chiller on the market. This site is a factory though and the ideal type of chiller for this application is a straight forward, un-complicated process chiller. We have our own factory manufacturing our own brand- I’ve sent the specifications in


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Commissioning a 100kw process chiller

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The most important day in a chiller’s life. They quite often come with loose wiring so first thing is to tighten all the wiring up. Ensure correct phase rotation by putting  cable tie in to the pump fan- the small ones don’t have phase rotation relays. Turn up the set point so the compressor does not come on while checking the glycol level. Set the LP/ HP. Put the desired set point in and run it up to check superheat and subcooling. Check the amps and adjust the overloads.  Choke off the exit to the evaporator to get 5 degrees Δ T and Bobs your Uncle- it’s away!


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Freeze-up stat

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Hi Folks, I thought you might be interested in a chiller repair I have just done. I have a customer who was having problems with freeze-ups- when the flow stops and because the water is not flowing through the evaporator. He has just scrapped a chiller because of this, so he asked me my advice. The chillers he has are built to a budget so these parts come as an extra. I suggested repairing the chillers by fitting a freeze stat to knock the compressor off and a flow switch to do the same when the flow stops. I did the chiller repair and he is really happy


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HFC phase down

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It is already starting to pinch: HFC refrigerant prices are starting to go up. They will keep going up too. Over the next 12 years there will be the gradual phase down of there refrigerants. This is to give the industry time to develop real alternatives for the future