Boiler mate questions

[Scott_D]

I am going to quote to replace this boiler mate with an unvented cylinder but have never seen one before

what do the three pumps do?
Boiler pump, heating system pump and?

It looks like the heating system is pressurised so is it just the thermal store that’s open vent?

is it copper inside? 🤓

 

[ShaunCorbs]

Main boiler pump

heating pump and sometimes hot water pump or another zone

yep with a few pcbs

no

 

[Scott_D]

What is the heat exchanger to the right doing?

 

[ShaunCorbs]

Hot water plate

 

[Knappers]

It may be usefull to see it like a combi boiler ony heat is supplied from a separate boiler (pump 1) and instead of a diverter valve it uses separate pumps for heating (pump 2) and hot water (pump 3)