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I have a customer that I am putting in a new heat only Baxi boiler and small unvented cylinder but she has an odd configuration on her current cylinder which I've not come across before.
I've attached a photo, what confuses me is that there is no sort of mechanical valves either 2 port of mid position to control the flow direction off the boiler. On her programmer she can have hot water on, hot water and heating on but not just heating on. There are 2 pumps, I assume one is from the boiler which goes straight in to the cylinder so I can't see how it gets round the rads unless it always goes through the cylinder. The second pump I assume is for the hot water circulation. Another thing is for a small self fed tank on the same level as the bahroom she has excellent flow and pressure. I've seen simular tanks that dribble out HW.
Steve
I've attached a photo, what confuses me is that there is no sort of mechanical valves either 2 port of mid position to control the flow direction off the boiler. On her programmer she can have hot water on, hot water and heating on but not just heating on. There are 2 pumps, I assume one is from the boiler which goes straight in to the cylinder so I can't see how it gets round the rads unless it always goes through the cylinder. The second pump I assume is for the hot water circulation. Another thing is for a small self fed tank on the same level as the bahroom she has excellent flow and pressure. I've seen simular tanks that dribble out HW.
Steve