Hi folks,
I've just moved into a new house and I'm fighting a losing battle with my boiler system. I'm hoping for some insight/help from the experts here!
Firstly, I'm not sure I understand my system properly. I've got quite an old house, and I suspect some of the previous residents have done some 'inventive' plumbing. I have:
- Vokera 20e boiler
- Hot Water tank downstairs
- Small tank in loft (is this an F&E tank? How would I know?)
- Immersion heater connected to boiler
- Hot Water tank thermostat (strapped to tank, wired in, but I'm not sure where to)
- 5-2, 2 channel heating control (Hot Water/Heating)
- 1 room thermostat (wired into something, but not sure where)
- Danfoss water pump (needed to provide pressure for shower, despite shower being next to the tank!?!)
So, I understand this to be a gravity DHW and pumped CH system, am I right? If so, what I've read is that you need HW on to have the CH work, but thats not my case.
I've got two problems:
1. The boiler keeps entering 'reset' mode, presumably because its overheating. I had the bolier serviced thinking this was the problem, and they replaced the thermistor, but the problem still occurs.
2. When we switch the system to DHW only, the upstairs radiators heat up. From my reading this is 'back syphoning', and I need a flow check valve, which I definitely can't see near the boiler.
Thank you in advance for any help!
I've just moved into a new house and I'm fighting a losing battle with my boiler system. I'm hoping for some insight/help from the experts here!
Firstly, I'm not sure I understand my system properly. I've got quite an old house, and I suspect some of the previous residents have done some 'inventive' plumbing. I have:
- Vokera 20e boiler
- Hot Water tank downstairs
- Small tank in loft (is this an F&E tank? How would I know?)
- Immersion heater connected to boiler
- Hot Water tank thermostat (strapped to tank, wired in, but I'm not sure where to)
- 5-2, 2 channel heating control (Hot Water/Heating)
- 1 room thermostat (wired into something, but not sure where)
- Danfoss water pump (needed to provide pressure for shower, despite shower being next to the tank!?!)
So, I understand this to be a gravity DHW and pumped CH system, am I right? If so, what I've read is that you need HW on to have the CH work, but thats not my case.
I've got two problems:
1. The boiler keeps entering 'reset' mode, presumably because its overheating. I had the bolier serviced thinking this was the problem, and they replaced the thermistor, but the problem still occurs.
2. When we switch the system to DHW only, the upstairs radiators heat up. From my reading this is 'back syphoning', and I need a flow check valve, which I definitely can't see near the boiler.
Thank you in advance for any help!