G
Goldspoon
Still learning - especially about central heating systems - so apologies if any of the next couple of questions are daft ones
On a friend's unvented there are two motorised valves (S system): one en route to HW and one to rads.
1. Can both be open at the same time (hw and ch at same time)?
There is a stat on the cylinder that when I was there was set at 90 degrees. The friend did not know what this was for and "used the boiler to set the hot water temperature" and this was at 76 degrees.
I suggested that the HW water temp at the boiler only dictated the heat of the water going through the coil. The hotter the boiler HW temp then the faster the cylinder of water heated up. It was the stat on the cylinder that determined the temp of water leaving the cylinder for showers taps etc.
2. Am I right in what I suggested in the last paragraph?
3. If the cylinder temp was set at 90 and the boiler HW set at 76 then surely the cylinder would never be satisfied and so would never send instruction to say so. Am I correct?
4. The boiler has settings for HW and seperate settings for CH. Let's say we set hot water at 60 and rads at 80 degrees. If there is only one flow and return leaving the boiler and that water (via valves) is distributed to both HW and CH... how does the boiler manage to supply two different temperatures of water. This is related to question 1 as the problem arises if both CH and HW are on at the same time I presume?
Thanks!
On a friend's unvented there are two motorised valves (S system): one en route to HW and one to rads.
1. Can both be open at the same time (hw and ch at same time)?
There is a stat on the cylinder that when I was there was set at 90 degrees. The friend did not know what this was for and "used the boiler to set the hot water temperature" and this was at 76 degrees.
I suggested that the HW water temp at the boiler only dictated the heat of the water going through the coil. The hotter the boiler HW temp then the faster the cylinder of water heated up. It was the stat on the cylinder that determined the temp of water leaving the cylinder for showers taps etc.
2. Am I right in what I suggested in the last paragraph?
3. If the cylinder temp was set at 90 and the boiler HW set at 76 then surely the cylinder would never be satisfied and so would never send instruction to say so. Am I correct?
4. The boiler has settings for HW and seperate settings for CH. Let's say we set hot water at 60 and rads at 80 degrees. If there is only one flow and return leaving the boiler and that water (via valves) is distributed to both HW and CH... how does the boiler manage to supply two different temperatures of water. This is related to question 1 as the problem arises if both CH and HW are on at the same time I presume?
Thanks!