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I do not do a great deal of refrigeration work, just the odd stat here and there.
I was always under the impression that under no circumstances should refrigeration units with compressors be laid flat on the floor.
Is this still the case and if so what are the reasons for this.Re: Laying fridges flat?
It’s adviseable not to lay them but if they are then it’s 24 hours upright before switching on as a general rule.
The main reason is that the compressor has oil in it and it runs up the pipework when laid flat, if it’s powered up straight away it pumps the oil in to the system and blocks it, normally this is terminal.
Dave.
Re: Laying fridges flat?
If laying flat is unavoidable then lay it on the side which has the high presure output pipe from the compresor i.e. the narrowest pipe which goes directly to the condenser, the black ‘radiator’ les oil movement is involved this way and do check that the door will be secure during transit. 😉
Re: Laying fridges flat?
Basicly without going into to much techy stuff, the reason is oil migration into the cappilary tube,oil entering will prevent the flow of refrigerant, allso as the compressor is refrigerant cooled it will cycle on the overload,overheat and eventually burn out.
Re: Laying fridges flat?
Do remember that the fridge can be laid on its front, the oil will not go into any of the pipes. The three pipes are always biased toward the rear of the compressor leaving plenty of space. Also where the charging stubb is one one side with HP and return on the other side it can of course be laid on the side that allows the charging stubb to point downwards, any oil in here will drain back into the sump immediately its placed upright.
KevinRe: Laying fridges flat?
I disagree with an earlier comment about laying it on its Highpressure side as any residue left in the pipe will pump straight into the filter/drier.
Laying on the suction side you can virtually switch them on straight away, though it is sensible to leave them standing to let all the oil back into compressor.
Kirk
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