Converting heating to fully pumped

[Big G]

Our central heating is currently a gravity system. It is plumbed in a similar way to the diagram on page 9 of the glowworm instruction book - diagram 3.3.

http://www.glow-worm.co.uk/stepone/data/downloads_sd/73/00/00/ultimate50bf.pdf

The only difference is that there is no cylinder stat. The pipes to the cylinder are in 22mm rather than 28mm. Also, the pipes don't rise continuously - there's a 12 feet lateral pipe run. Put bluntly, it hardly works.

I'm therefore going to convert it to fully pumped.

I have a couple of questions:

Where the feed and expansion is connected - on diagram 3.2 it shows them as being right next to the pump - is there a maximum or minimum distance?

Secondly, as a control pack, I was going to use a Danfoss one

http://www.screwfix.com/prods/97244/Plumbing/Central-Heating-Controls/Danfoss-Heating-Control-Pack

Are these OK or should they be avoided?

Anyone got any other advice or things to look out for?

Many thanks in advance

G

 

[Whitespirit66]

Go for the Honeywell Y Plan control pack. Bit more cash, but worth the extra. They do a smartfit one if you want the wiring done for you, just need to plug the components into each other.

http://www.heatingcontrolsonline.co.uk/honeywell-day-yplan-pack-p-316.html


http://www.heatingcontrolsonline.co.uk/honeywell-smartfit-7day-yplan-pack-p-194.html