Hi Michael, For some reason your follow up question (about the dryer being near the washer) didn't show up on this page until quite a lot later than your posting time) and I'd had to go out to the hardware shop.
Any, yes, the dryer is only couple of feet from the washer. BUT the washer waste drain does not have the expected vertical standing pipe to allow for air, burbling, etc. This is in a new utility room and the builders, who finished work on the 23rd of December and didn't have a plumber in the crew got a guy who'd "done a plumbing course" to re-plumb in the clothes washer in the same manner as you'd do a dishwasher - entering the utility sink drain just above the trap through a t-joint with a clamped hose - so there is no handy vertical waste pipe. I was a bit dismayed when I saw that but saw no urgent need to alter it. One option is to drain the dryer in the same way, but it's drain hose is a small diameter (1/4" or so) which is much smaller than the nozzles on most sink drain t joints. So if the condensing drier ought best to be drained in the same way as a clothes washer normally drains (upright pipe with hose secured appropriately fed down the vertical pipe) I can sort that sooner or later - but would be good to hear a professional view on it.
However, equally lacking in info about the connection to the hose at the back of the drier. There is no immediately obvious approach. No labels, symbols, nothing. However, there is slightly exposed rubber tube of the correct gauge withn elbow joint. A horizontal feed towards the bottom of the drier, with an elbow with a but attached heading up towards the reservoir that captures the extracted water. My guess is to attach the external drain hose in place of the one that rises - leaving the hose to the receptacle unattached. I can't see any issue with that, but would have been nice if LG had provided any info at all, even on its website no installation manuals for any product.
Like I say, I could make a fairly educated judgement about how to do this right , but always prefer to be absolutely sure when in any doubt rather than revisit when there is a problem.
So any views on this much appreciated.