wrote in message
Hi thanks for your reply. A few more newbie questions. 1) Where is
the drain. Unless it's hidden I do not see it. 2) In terms of
purging the system how exactly do you do that? Thanks.

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The drain my not be on the boiler but on the piping in the system as it
enters or leaves the loop. Every system is a bit different so look around.
My system has a drain near the floor and a valve on each zone just before
the circulator for the zone.

The heating system will have an air trap and should be self venting. If,
however, you have a lot of air to get rid on, just slightly crack the drain
valve just slightly while the circulator is running and you'll hear it
sputter as air pockets pass by.