Ducted Air Con Insulated Pipes Installation, Routing, Bending, Laying

Hi, I am installing a Ducted split system Air conditioner and am finally up to the stage of installing the pipes between the outdoor and indoor units. I have a 10 metre roll of insulated copper pipe, sizes are 3/8 and 5/8.

I would like to install the pipes myself and then have a professional do the final connections to the units. The connection between the 2 units involves a 3 metre ascent up a wall, a right angle turn inside the ceiling space, and then a 4 metre flat run to the indoor unit.

Having never worked with this pipe, i'm unsure of how the bending of it will go and want to make sure I don't kink or damage the pipe. My questions are:

1. Obviously I will need to straighten out the pipe to start with, can this just be done by hand or is a special straightening device required?
2. Can I feed the pipe into the ceiling as I'm unrolling it and then use the bend that is already in the pipe to make the turn from wall to to ceiling? or will it need to be bent properly at a right angle? will this require a device to bend it?
3 Are there any special considerations like does the horizontal section need to have a slope on it? does it need any 's' bends in it at certain lengths etc?

Any help on this subject would be greatly appreciated. Am happy to do a sketch to explain the layout more clearly if that would help.


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