I have just moved into a new house and was wondering if someone could please explain my heating system to me. We have a Vaillant ecoTEC plus 637 condensing boiler sitting next to a MegaFlo HE cylinder. There is a honeywell ST6400C display on the wall and then two fused switches next to that. The power for the MegaFlo Cylinder is turned off and I have set the Vaillant system to hot water on demand. The honeywell control panel is set to off for the hot water and heating. I have a few basic questions:
1) What is the MegaFlo system for when I have a boiler next to it?
2) Why is the power off to the MegaFlo
3) Does the Honeywell controller (and thermostat downstairs) override the control panel of the boiler?
4) Should I pay £89 to Vaillant to upgrade my warranty to a 3rd year?
Thanks so much for any help.
1) What is the MegaFlo system for when I have a boiler next to it?
2) Why is the power off to the MegaFlo
3) Does the Honeywell controller (and thermostat downstairs) override the control panel of the boiler?
4) Should I pay £89 to Vaillant to upgrade my warranty to a 3rd year?
Thanks so much for any help.