The Precise Temperature of my Beer

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Originally Posted by p38arover

I'm in the process of fitting a fan to my old Engel. A couple of ex-colleagues from OTC <snip>
Ron

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getting OT here,
Ron, were you ever at OTC Doonside ?
Visited there a few times when I was in school and did some work there on the big AC system when I was a young apprentice a long time ago......

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Originally Posted by rick130

getting OT here,
Ron, were you ever at OTC Doonside ?
Visited there a few times when I was in school and did some work there on the big AC system when I was a young apprentice a long time ago......

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Only for a few weeks as a trainee technician on field training in 1965/1966. After finishing my training, I spent the next few years working on satellite comms stations in Moree (NSW), Ceduna (SA), and Carnarvon (WA).

I remember working with the plant guys on that A/C system when I was a trainee.

Ron

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Originally Posted by p38arover

I'm in the process of fitting a fan to my old Engel. A couple of ex-colleagues from OTC have done some playing around and found that the fan really improves the efficiency of the Engel. They found that if the condesor coils get above about 43 deg C, the cooling efficiency of the Engel falls dramatically.

I've been given a circuit diagram for the older style which will help with the wiring in of the fan. It can't be connected across the compressor as that runs at 20VAC.


Ron

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mentioned elsewhere on the forum is a kit voltage regulator that drops 12v- any other lowervoltage... In reality it deals with 1.2-16vdc...

Fit a bridge rectifier across the 12v terminals inside the fridge and hook up the voltqage regulator power in to the output side of the bridge rectifier(dont let it ground to anything but the outputs of the bridge rectifiers) on the output side of the voltage regulator(set at 5.5v) put a pair of 5v cpu fans.

problem solved. when its doing its 20vac thing the bridge rectifier sorts it to dc drops its about 3v and the voltage regulator deals with the rest.....

when your on 12vdc the bridge rectifier still drops the 3v but since thats still over the output voltage of the regulator its all good..

Depending on what type of fans you get you may need to fit a filtering capacitor across the outputs of the rectifier to sort the little bit of rippling that will come out of it.

the kits are available from jaycar and dicksmiths..

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Originally Posted by TREX

Ok after having ran my new gadget for a while it seems the fridge just can't handle the temperature out here (40-45C) Does anyone else operate a 40L engle in this sort of temparture and can you get it down to zero in the heat?? I have a bag for it and a twozone so these are a bit of a trade off but should i look at getting it serviced so that it will stay cold in all temparature's or should i be happy with the 6 degree's is stays at during the day?

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where did you place the sensor in the fridge.......?

the lower down you have it the colder it will read.....the two zone keeps things cool up top......
whilst down below you can freeze things......and in between you chill things.......

make sure the sensor is down nearest the bottom of the fridge to give you the correct reading......

Yes, one of the ex-OTC blokes mentioned using a bridge rectifier but I assumed he had it across the 20VAC to the compressor.

The compressor runs on 20VAC whether the fridge is running on 240VAC or 12VDC.

I'll re-read his email when I get home.

Ron