"kennet_boater" <[EMAIL PROTECTED]> wrote: >do they have a thermostat switch to turn on and off as the fire heats and then >cools or does this have to be fitted seperatly?
You will need a separate one. Buy a pipe thermostat at any plumbing store for about 10 quid. Attach it to the outlet (hot) pipe from the water jacket as close as possible to your heater. Wire it to switch the pump on and off. The pump should cycle every few minutes, not just when the fire comes in or goes out. When the pump turns on, it will soon empty the water jacket of hot water, replacing it with cold(er) return water, and so will turn off when some of the cold(er) water gets into the outlet. Adrian Adrian Stott 07956-299966
