MBtek recommended settings
The exact TIS Tronic 260U settings MBtek specifies for the UNI 60 — boiler setpoint 65 °C, fan 40–80 %, supervision 35 %, hysteresis 2 °C and the full boiler settings list.
Load these values before the first fire — the factory defaults are generic across the whole TIS range and will not burn well in a UNI 60. These are MBtek's published settings from the UNI install guide.
Set the fan type first
Set Fan type = WPA 07 / DM85 before anything else. With the wrong fan type selected, the speed percentages below will not behave as described.
Below 140 °F you must fit a boiler protection valve
The use of a boiler protection valve is a must if using below 140 °F. The return water can generate heavy condensation on the unit, giving the impression of a water leak. See Piping.
User menu
| Setting | MBtek value | Factory default |
|---|---|---|
| Boiler setpoint | 65 °C / 149 °F | — |
| Exhaust setpoint | 160–240 °C / 320–464 °F | — |
| Fan ON time (purge time) | 10 s | 10 s |
| Fan OFF time (pause between blowups) | 5 min | 5 min |
| Maximum fan speed | 80 % | 50 % |
| Minimum fan speed | 40 % | 10 % |
| Fan performance in supervision | 35 % | 25 % |
Boiler settings
| Setting | MBtek value | Factory default |
|---|---|---|
| Brager Expert exhaust gases — firing-up time | 10 min | 10 min |
| Fan slowdown (deceleration) threshold | 12 °C / 21 °F | 12 °C |
| Boiler hysteresis | 2 °C / 5 °F | 2 °C |
| Maximum boiler temperature | 80 °C / 176 °F | 85 °C |
| Boiler shutdown temperature | 35 °C / 95 °F | 35 °C |
| Pump start temperature | 35 °C / 95 °F | 35 °C |
| Fan type | WPA 07 / DM85 | — |
| Firing-up time | 120 min | 120 min |
| Boiler cooling temperature | 78 °C / 172 °F | 78 °C |
What MBtek changed from the defaults
Three settings differ from the factory values, and they matter:
- Maximum fan speed 50 % → 80 % and minimum 10 % → 40 %: a UNI 60's fan needs more air than the generic default, and 10 % is low enough that the fan can hum without turning.
- Fan performance in supervision 25 % → 35 %: keeps the coals alive through the pause between blowups.
- Maximum boiler temperature 85 °C → 80 °C: a wider margin below the 94 °C emergency threshold and the STB's ~90 °C trip.
Applying them
Enter the menu
Hold F for 3 seconds.
Set the fan type
Boiler settings → Fan type → WPA 07 / DM85.
Set the operating mode
Boiler settings → Boiler operating mode → Brager Expert exhaust gases (requires the PT1000 exhaust sensor activated). Without the sensor, use Brager Expert.
Work down the boiler settings list
Apply every value in the boiler settings table above, in order.
Work down the user menu list
Apply every value in the user menu table above.
Set the boiler setpoint on the main screen
Press F until the boiler temperature main screen is showing, then use UP / DOWN to set 65 °C / 149 °F.
Record what you set
Note the software version and the final values on the commissioning paperwork.
These are a starting point, not a guarantee
The boiler manual is explicit: to achieve high-quality and reliable operation the controller parameters must be optimised, and it is necessary to agree them with a professional instructed by your local distributor. Chimney draft, fuel and building load all shift the ideal values.
Tuning notes
| Symptom | Setting to look at |
|---|---|
| Fan hums but does not turn | Raise minimum fan speed to 40 % |
| Fire dies during supervision | Raise fan performance in supervision, or shorten the pause between blowups |
| Boiler overshoots setpoint | Lengthen the pause between blowups, shorten purge time, widen the fan slowdown threshold |
| Boiler cycles between operation and supervision constantly | Raise boiler hysteresis (range 1–3 °C) |
| Fire takes too long to establish | Raise the Brager Expert exhaust firing-up time from 10 min |
| Controller reports failed fire-up | Raise firing-up time toward 120 min, or check fuel and draft |
Want MBtek to check your settings?
MBtek technical support can help with sizing, commissioning and controller settings.
What Standard, Brager Expert and Brager Expert exhaust gases each actually do.
Frequently asked questions
First start
Power up the TIS Tronic 260U for the first time and work through the six initial settings — operating mode, fan type, pump start temperature, exhaust sensor and more.
Operating modes
Standard, Brager Expert and Brager Expert exhaust gases on the TIS Tronic 260U — what each algorithm optimises, which parameters it exposes, and which to choose.