Draining down risks

[watford 99]

Yet another basic question I'm afraid.

If I drain down my 20 tube system and do not refill until a couple of days later and the sun shines am I likely to do damage to the manifold or other parts due to overheating.  Covering the tubes might not be too easy.

[desperate]

Probably not, but no guarantees given.

Desp

[greentangerine]

I think I remember the instructions that came with my kit said not to install the heat pipe tubes until the system had been filled but I can't find that piece of paper right now.

Anyway, when I extended the system earlier this year I covered the existing tubes when the system was drained down and I was installing another manifold.

If your tubes are the U type which contain fluid, then you probably can't drain it down anyway without removing them.