Hi,
Apologies for starting a new thread, but I have been reading numerous threads all week and i think i am more confused
My parents home has been using a Rayburn 499K oil burner to control CH & HW for 20yrs and its on it last legs. There never was a thermostat on the HW cylinder.
So I have got a Grant Vortex boiler installed to use primarily for CH & HW, with the rayburn still being used for cooking(and backup heating source).
Talking to the plumber, he didnt want to add a zone valve to the HW, due to the complexity with the Rayburn still able to run.
The new system has 1 zone valve, so when I press CH ON it heats CH and HW. Im ok with this.
When i press HW ON, the boiler and pump runs which heats up the HW tank.
I have tried to detail this a bit more in the attached schematic.
I am unsure about the how HW ON is wired (red in schematic), until next time i can check junction box.
Current Setup.jpg
SO I was thinking of adding Evohome to control the new boiler - and keeping current programmer in parallel to Evohome as its easy to use by my elderly parents.
I am thinking 2 bdr91's - 1 for Heating Zone valve, and other for boiler relay to control HW.
Evohome Proposal 1.jpg
I have 2 off HR91's which I was thinking of installing in living room and parents bedroom also.
I want to get this all correct in my head before i get an installer involved.
I am unsure if I have got the wiring correct. An help or suggestions would be welcomed.
Thanks in advance.
Apologies for starting a new thread, but I have been reading numerous threads all week and i think i am more confused
My parents home has been using a Rayburn 499K oil burner to control CH & HW for 20yrs and its on it last legs. There never was a thermostat on the HW cylinder.
So I have got a Grant Vortex boiler installed to use primarily for CH & HW, with the rayburn still being used for cooking(and backup heating source).
Talking to the plumber, he didnt want to add a zone valve to the HW, due to the complexity with the Rayburn still able to run.
The new system has 1 zone valve, so when I press CH ON it heats CH and HW. Im ok with this.
When i press HW ON, the boiler and pump runs which heats up the HW tank.
I have tried to detail this a bit more in the attached schematic.
I am unsure about the how HW ON is wired (red in schematic), until next time i can check junction box.
Current Setup.jpg
SO I was thinking of adding Evohome to control the new boiler - and keeping current programmer in parallel to Evohome as its easy to use by my elderly parents.
I am thinking 2 bdr91's - 1 for Heating Zone valve, and other for boiler relay to control HW.
Evohome Proposal 1.jpg
I have 2 off HR91's which I was thinking of installing in living room and parents bedroom also.
I want to get this all correct in my head before i get an installer involved.
I am unsure if I have got the wiring correct. An help or suggestions would be welcomed.
Thanks in advance.
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