Can someone explain this system

[Meatpie58]

It's a gravity system, hw on the time clock turns the boiler on ,then the boiler stat controls the hw temp ,the ch on the time clock then goes to the room stat which in turn runs the pump to supply heat to the rads ,have a look under the floor for the pump if it's not by the boiler,ps sell them a new boiler with proper controls,it's going to save them £200-£400 per year on gas!

 

[happyflyer]

Would not the 1/2" feed be running through a coil? - for domestic hot water.
Would not the tank be mostly full of HHW?
Would not the tank temperatures be controlled through a boiler stat on the front of the boiler?
Would not the heating be controlled by a thermostat operating a pump from the outlet of the HHW from the cylinder.
There may or may not be a pump from the top of the Glow Worm, if there is, it is circulating the water around the boiler piping and tank and most probably not doing the heating.

Just thinking out loud

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Don't know....:13: need more photos that's what UKPF is always short of... it needs ripping out and starting again it's old tat, confined to the history books, let it RIP.

 

[oz-plumber]

What else could it be then?

In the last 25 + years hot water systems have done a complete swing - 180 degrees.

Originally the cylinder was full of heating hot water and a coil was placed inside the cylinder to heat domestic hot water.
It also gave the customer instant heating - as soon as the thermostat started the pump - instant hot water to the panels.
Now cylinders have a heating hot water coil in them to heat a cylinder of domestic hot water.
This gives the consumer the amount of water in the cylinder as a storage / useable amount.

That's how I see it.

 

[kay-jay]

What else could it be then?

In the last 25 + years hot water systems have done a complete swing - 180 degrees.

Originally the cylinder was full of heating hot water and a coil was placed inside the cylinder to heat domestic hot water.
It also gave the customer instant heating - as soon as the thermostat started the pump - instant hot water to the panels.
Now cylinders have a heating hot water coil in them to heat a cylinder of domestic hot water.
This gives the consumer the amount of water in the cylinder as a storage / useable amount.

That's how I see it.

other way round over here. two different systems, thermal store and traditional hw storage

 

[sheff paul]

What else could it be then?

In the last 25 + years hot water systems have done a complete swing - 180 degrees.

Originally the cylinder was full of heating hot water and a coil was placed inside the cylinder to heat domestic hot water.
It also gave the customer instant heating - as soon as the thermostat started the pump - instant hot water to the panels.
Now cylinders have a heating hot water coil in them to heat a cylinder of domestic hot water.
This gives the consumer the amount of water in the cylinder as a storage / useable amount.

That's how I see it.

where are you based oz,do you do tube outs.sani's,or drains,come on spill the beans