| Ground Floor | Middle Floor | Top Floor | ||||||||||||||
| Run | Boiler | Kitchen | Hall | Downstairs Loo | Lounge | Conservatory | Front Bedroom | Rear Bedroom | Bathroom | Top Bedroom | En Suite | Dressing Room | Max | Min | Diff | |
| Info | Flow | R | L (LSV) | R (WH) | L (LSV) | L (LSV) | R (TRV) | R (TRV) | R (TRV) | R (TRV) | L (LSV) | L (LSV) | R (TRV) | - | - | - |
| Return | L | R (TRV) | L (LSV) | R (TRV) | R (TRV) | L (LSV) | L (LSV) | L (LSV) | L (LSV) | R (TRV) | R (TRV) | L (LSV) | - | - | - | |
| Height | - | 500 | 500 | 300 | 600 | 600 | 500 | 500 | 600 | 400 | 600 | 600 | - | - | - | |
| Length | - | 700 | 600 | 400 | 1000 | 600 | 1000 | 1000 | 500 | 700 | 500 | 600 | - | - | - | |
| Type | - | Double | Double | Single | Single | Double | Single | Single | Double | Double | Single | Single | - | - | - | |
| Output | - | 1048W | 898W | ~250W | 948W | 1041W | 812W | 812W | 868W | ~1000W | 488W | 570W | - | - | - | |
| LSV | - | Open | Open | Open | Open | Open | Open | Open | Open | Open | Open | Open | - | - | - | |
| 1 | LSV | - | All fully open (approx 3.5 turns depending on valve type/manufacturer) (=MAX) | - | - | - | ||||||||||
| Flow | 64.7 | 64.3 | 64.4 | 64.6 | 64.1 | 58.3 | 63.8 | 63.9 | 63.3 | 64.2 | 63.4 | 63.6 | 64.6 | 58.3 | 6.3 | |
| Return | 56.3 | 54.3 | 58.7 | 62.3 | 54.3 | 51.8 | 58.1 | 57.9 | 57.9 | 57.4 | 60.2 | 60.4 | 62.3 | 51.8 | 10.5 | |
| Drop | 8.4 | 10 | 5.7 | 2.3 | 9.8 | 6.5 | 5.7 | 6 | 5.4 | 6.8 | 3.2 | 3.2 | 10 | 2.3 | 7.7 | |
| Notes | Boiler believed to be up to temperature (set at 3 out of 5 on an approximate scale of 30-82C). Burner modulating down low, not yet cycling. | |||||||||||||||
| 2 | LSV | - | All fully open (approx 3.5 turns depending on valve type/manufacturer) (=MAX) | - | - | - | ||||||||||
| Flow | 64.8 | 63.8 | 64.4 | 64.6 | 64.1 | 58.8 | 63.6 | 62.4 | 63.1 | 63.4 | 63.4 | 63.1 | 64.6 | 58.8 | 5.8 | |
| Return | 57.4 | 54.3 | 58.3 | 62.1 | 54.1 | 51.8 | 58 | 57.4 | 57.7 | 56 | 59.8 | 60 | 62.1 | 51.8 | 10.3 | |
| Drop | 7.4 | 9.5 | 6.1 | 2.5 | 10 | 7 | 5.6 | 5 | 5.4 | 7.4 | 3.6 | 3.1 | 10 | 2.5 | 7.5 | |
| Notes | Run 2 performed 5 mins after Run 1 to check consistency in measurements/results and confirm system up to temperature. No changes to LSVs. | |||||||||||||||
| 3 | LSV | - | =MAX | =MAX | =1 | =MAX | =MAX | =MAX | =MAX | =MAX | =MAX | =1.25 | =1.25 | - | - | - |
| Flow | 65.8 | 65.2 | 65.4 | 65.8 | 64.4 | 59.6 | 64.4 | 63.3 | 63.4 | 64.4 | 64.3 | 64.3 | 65.8 | 59.6 | 6.2 | |
| Return | 58.4 | 55.6 | 59.2 | 61.2 | 53.6 | 52.6 | 58.3 | 58.9 | 58.3 | 57.4 | 60.4 | 58.8 | 61.2 | 52.6 | 8.6 | |
| Drop | 7.4 | 9.6 | 6.2 | 4.6 | 10.8 | 7 | 6.1 | 4.4 | 5.1 | 7 | 3.9 | 5.5 | 10.8 | 3.9 | 6.9 | |
| Notes | LSV positions defined in number of turns open (from fully closed). System left to stabilise for 15mins before temperature readings taken. | |||||||||||||||
| 4 | LSV | - | =MAX | =MAX | =0.75 | =MAX | =MAX | =MAX | =MAX | =MAX | =MAX | =0.75 | =1 | - | - | - |
| Flow | 66.4 | 65.4 | 65.8 | 66 | 65.5 | 64.2 | 65 | 65.2 | 65.2 | 65.4 | 64.7 | 65 | 66 | 64.2 | 1.8 | |
| Return | 58.3 | 55.8 | 59.6 | 62.6 | 56.1 | 54.1 | 59.7 | 59 | 60.8 | 58.2 | 60.4 | 60.7 | 62.6 | 54.1 | 8.5 | |
| Drop | 8.1 | 9.6 | 6.2 | 3.4 | 9.4 | 10.1 | 5.3 | 6.2 | 4.4 | 7.2 | 4.3 | 4.3 | 10.1 | 3.4 | 6.7 | |
| Notes | Small rads heading in the right direction but need to increase the middle floor drops. | |||||||||||||||
| 5 | LSV | - | =MAX | =MAX | =0.5 | =MAX | =MAX | =1 | =1 | =1 | =MAX | =0.5 | =0.75 | - | - | - |
| Flow | 66.7 | 64.9 | 66.4 | 65.5 | 65.7 | 64.4 | 65.8 | 65.4 | 65.6 | 65.8 | 65.4 | 65.5 | 66.4 | 64.4 | 2 | |
| Return | 59.3 | 56.9 | 60.4 | 62.7 | 57.1 | 54.9 | 60.3 | 59.1 | 60.3 | 59.2 | 60.3 | 61.2 | 62.7 | 54.9 | 7.8 | |
| Drop | 7.4 | 8 | 6 | 2.8 | 8.6 | 9.5 | 5.5 | 6.3 | 5.3 | 6.6 | 5.1 | 4.3 | 9.5 | 2.8 | 6.7 | |
| Notes | Middle floor throttling has likely upped the flow elsewhere (hence drops on other rads also falling). Will try throttling all previously-throttled LSVs further (particularly so the d/stairs loo). | |||||||||||||||
| 6 | LSV | - | =MAX | =MAX | =0.25 | =MAX | =MAX | =0.75 | =1 | =0.75 | =MAX | =0.25 | =0.5 | - | - | - |
| Flow | 67.3 | 66.6 | 67.2 | 66.9 | 67.2 | 66.1 | 67.3 | 67.3 | 66.3 | 67.3 | 65.9 | 66.5 | 67.3 | 65.9 | 1.4 | |
| Return | 59.4 | 58.5 | 62 | 61.2 | 59.1 | 57 | 60.8 | 61.6 | 61.2 | 61.1 | 55.5 | 62.1 | 62.1 | 55.5 | 6.6 | |
| Drop | 7.9 | 8.1 | 5.2 | 5.7 | 8.1 | 9.1 | 6.5 | 5.7 | 5.1 | 6.2 | 10.4 | 4.4 | 10.4 | 4.4 | 6 | |
| Notes | En suite is throttled too far. Dressing room, bathroom and hall need throttling a little bit further. | |||||||||||||||
| 7 | LSV | - | =MAX | =1 | =0.25 | =MAX | =MAX | =0.75 | =1 | =2/3 | =MAX | =1/3 | =1/3 | - | - | - |
| Flow | 67.4 | 67.1 | 67.8 | 67.2 | 67.4 | 66.4 | 67.2 | 67.6 | 67 | 67.4 | 66.9 | 66.8 | 67.8 | 66.4 | 1.4 | |
| Return | 59.6 | 58.9 | 62 | 61.6 | 59.5 | 57.4 | 61.3 | 61.8 | 61.2 | 61.6 | 60.3 | 61.4 | 62 | 57.4 | 4.6 | |
| Drop | 7.8 | 8.2 | 5.8 | 5.6 | 7.9 | 9 | 5.9 | 5.8 | 5.8 | 5.8 | 6.6 | 5.4 | 9 | 5.4 | 3.6 | |
| Notes | Drop difference now within 3.6C (2.8C excluding conservatory radiator). Will try dropping pump speed (from 3 to 2) to see if all drops can be raised. | |||||||||||||||
| 8 | LSV | - | =MAX | =1 | =0.25 | =MAX | =MAX | =0.75 | =1 | =2/3 | =MAX | =1/3 | =1/3 | - | - | - |
| Flow | 68.3 | 68.3 | 68.6 | 67.7 | 68.3 | 67.2 | 67.3 | 68.1 | 67.7 | 68.1 | 67.2 | 67.2 | 68.6 | 67.2 | 1.4 | |
| Return | 60.1 | 59.5 | 62.6 | 61.3 | 59.3 | 57.3 | 61.3 | 62 | 60.9 | 62 | 60.4 | 61.4 | 62.6 | 57.3 | 5.3 | |
| Drop | 8.2 | 8.8 | 6 | 6.4 | 9 | 9.9 | 6 | 6.1 | 6.8 | 6.1 | 6.8 | 5.8 | 9.9 | 5.8 | 4.1 | |
| Notes | Lowering pump speed didn't seem to do much difference (possibly upped the drop by nearly a degree?). Will try letting it stablise for longer… | |||||||||||||||
| 8 | LSV | - | =MAX | =1 | =0.25 | =MAX | =MAX | =0.75 | =1 | =2/3 | =MAX | =1/3 | =1/3 | - | - | - |
| Flow | 68.6 | 68.6 | 69 | 68.3 | 68.6 | 67.3 | 67.9 | 68.3 | 67.8 | 68.6 | 67.4 | 67.4 | 69 | 67.3 | 1.7 | |
| Return | 60.5 | 59.9 | 62.8 | 62 | 59.6 | 57.6 | 61.8 | 62.3 | 60.4 | 62.1 | 60.5 | 62.2 | 62.8 | 57.6 | 5.2 | |
| Drop | 8.1 | 8.7 | 6.2 | 6.3 | 9 | 9.7 | 6.1 | 6 | 7.4 | 6.5 | 6.9 | 5.2 | 9.7 | 5.2 | 4.5 | |
| Notes | No change made to LSVs (system just left to stablise after dropping the pump speed from 3 to 2). Will try dropping to 1 for Run 9… | |||||||||||||||
| 9 | LSV | - | =MAX | =1 | =0.25 | =MAX | =MAX | =0.75 | =1 | =2/3 | =MAX | =1/3 | =1/3 | - | - | - |
| Flow | 69.6 | 69.3 | 69.9 | 69 | 69.3 | 67.9 | 68.6 | 69.3 | 68.2 | 69.4 | 68.3 | 68.5 | 69.9 | 67.9 | 2 | |
| Return | 60.3 | 59.4 | 62.8 | 61.8 | 59.1 | 57.3 | 61.7 | 62.2 | 60.5 | 62.5 | 60.2 | 61.4 | 62.8 | 57.3 | 5.5 | |
| Drop | 9.3 | 9.9 | 7.1 | 7.2 | 10.2 | 10.6 | 6.9 | 7.1 | 7.7 | 6.9 | 8.1 | 7.1 | 10.6 | 6.9 | 3.7 | |
| Notes | Drops have now risen across the board (Ideal Icos manual says to have 11C drop max across boiler with all TRVs open). Will close top bedroom to 1 and tweak close other low-drop LSVs. | |||||||||||||||
| 10 | LSV | - | =MAX | =1 | =0.25 | =MAX | =MAX | =0.75 | =1 | =2/3 | =1 | =1/3 | =1/3 | - | - | - |
| Flow | 69.6 | 69.3 | 69.8 | 69 | 69.3 | 67.9 | 69.1 | 69.5 | 68.3 | 69.5 | 68.4 | 68.4 | 69.8 | 67.9 | 1.9 | |
| Return | 59.6 | 59.3 | 62.8 | 61.8 | 59.4 | 57.4 | 61.9 | 62.4 | 60.9 | 61.4 | 60.4 | 60.1 | 62.8 | 57.4 | 5.4 | |
| Drop | 10 | 10 | 7 | 7.2 | 9.9 | 10.5 | 7.2 | 7.1 | 7.4 | 8.1 | 8 | 8.3 | 10.5 | 7 | 3.5 | |
| Notes | Listed LSV positions now approximate (following slight, immeasurable, tweaks). System balanced to within 3.5C (7C to 10.5C). | |||||||||||||||