# MBtek UNI 60 Documentation > Complete MBtek UNI 60 (200K BTU) wood gasification boiler documentation: specifications, clearances, installation, TIS Tronic 260U controller setup, operation, maintenance and troubleshooting. Product: UNI 60 Wood Boiler, 200K BTU (UNI-60) — Wood gasification boiler Manufacturer: MBtek — https://mbtek.com Buy: https://mbtek.com/collections/wood-boilers/products/uni-60-boiler-200k-btu Support: 888-301-0737 · info@mbtek.com Documentation: https://uni.sonicar.tech/ Last reviewed: 2026-09-23 # UNI 60 Documentation - [UNI 60 wood boiler documentation](https://uni.sonicar.tech/docs): Official MBtek documentation for the UNI 60 (200K BTU) wood gasification boiler — specifications, installation, TIS Tronic 260U controller setup, operation and service. - 1 · Get started - [Quick start](https://uni.sonicar.tech/docs/start/quick-start): The complete UNI 60 project in eleven ordered stages — from unpacking the crate to the first heating season, with links to the detailed page for each step. - [How the UNI 60 works](https://uni.sonicar.tech/docs/start/how-it-works): Inside the UNI 60 — the firebox, the three-pass flue path, the forced-draft fan and the TIS Tronic 260U controller, with the labelled factory section drawings. - [UNI 60 specifications](https://uni.sonicar.tech/docs/start/specifications): Full published specifications for the MBtek UNI 60 wood boiler — 85–205 KBTU output, 40 gal water volume, 58 gal firebox, 2 in connections, 8 in flue and 1,224 lb weight. - [What's in the box](https://uni.sonicar.tech/docs/start/whats-in-the-box): The UNI 60 delivery contents, the damage inspection you must complete before accepting the boiler, and the parts you need to buy separately. - [Safety](https://uni.sonicar.tech/docs/start/safety): The hard limits for the UNI 60 — 15 psi maximum operating pressure, 185 °F maximum flow temperature, mandatory relief valve — plus emergency procedures and burn hazards. - 2 · Plan the installation - [Boiler room and clearances](https://uni.sonicar.tech/docs/planning/boiler-room): Required clearances for the UNI 60 — 24 in to side and back walls, 36 in at the front, 28 in overhead — plus floor, ventilation and service access requirements. - [Chimney requirements](https://uni.sonicar.tech/docs/planning/chimney): Specify the UNI 60 flue — 8 in minimum diameter, acid-resistant 316 stainless steel, insulated where exposed, to EN 1856-1 and EN 1856-2. - [Hydronic system design](https://uni.sonicar.tech/docs/planning/system-design): Design the UNI 60 hydronic system — closed loop, expansion tank, safety relief valve, return-temperature protection and the recommended MBtek installation scheme. - [Buffer tank and hot water](https://uni.sonicar.tech/docs/planning/buffer-and-hot-water): Why a UNI 60 needs thermal storage, how the buffer tank fits the scheme, and how the TIS Tronic 260U prepares domestic hot water in Summer and Winter modes. - [Fuel and storage](https://uni.sonicar.tech/docs/planning/fuel-storage): Which fuels the UNI 60 accepts, how dry wood must be, the calorific value of common species, and the 4 ft fuel storage clearance rule. - 3 · Installation - [Positioning the boiler](https://uni.sonicar.tech/docs/installation/positioning): Unpack, move and set the UNI 60 in place — floor, levelling, clearances and the flue connection, before any pipework or wiring begins. - [Hydronic piping](https://uni.sonicar.tech/docs/installation/piping): Pipe the UNI 60 — 2 in supply and return, mandatory safety relief valve, expansion tank, drain and return-temperature protection to stop condensation corrosion. - [Filling and water quality](https://uni.sonicar.tech/docs/installation/filling): Fill the UNI 60 with water below 2 ppm hardness, vent the system, and pressure-test to no more than 50 psi. Scale damage is not covered by warranty. - [Electrical and sensors](https://uni.sonicar.tech/docs/installation/electrical): Wire the TIS Tronic 260U — 230 V supply, grounding, boiler sensor in the immersion well, STB safety thermostat on I1, and the optional PT1000 exhaust probe. - [Wiring a 120 V pump](https://uni.sonicar.tech/docs/installation/pump-wiring): Connect a 120 V circulator to the TIS Tronic 260U using the supplied 220 VAC relay block — controller contacts 7 and 8, pump to 3 and 5 or 4 and 6. - [Room thermostat](https://uni.sonicar.tech/docs/installation/room-thermostat): Connect a room thermostat to terminal I2 on the TIS Tronic 260U — dry contact required, 24 VAC thermostats need an SPDT relay, and the contact logic must be inverted. - [Mounting the controller](https://uni.sonicar.tech/docs/installation/controller-mounting): Fit the TIS Tronic 260U to the UNI boiler lid, including the five-step adapter plate procedure for replacing an older TIS Tronic 83 regulator. - [Commissioning checklist](https://uni.sonicar.tech/docs/installation/commissioning): The final pre-fire walkthrough for a UNI 60 — hydraulics, electrics, controller settings, draft and documentation — before the first fire is lit. - 4 · TIS Tronic 260U - [TIS Tronic 260U overview](https://uni.sonicar.tech/docs/controller/overview): What the TIS Tronic 260U controller does on a UNI 60 — fan modulation, pump control, three operating modes, hot water preparation and the safety chain behind it. - [Control panel](https://uni.sonicar.tech/docs/controller/control-panel): Every button, indicator and main screen on the TIS Tronic 260U — START, STOP, UP, DOWN and F, plus the alarm, pump and fan indicators. - [First start](https://uni.sonicar.tech/docs/controller/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. - [MBtek recommended settings](https://uni.sonicar.tech/docs/controller/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. - [Operating modes](https://uni.sonicar.tech/docs/controller/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. - [User menu](https://uni.sonicar.tech/docs/controller/user-menu): The five fan parameters in the TIS Tronic 260U user menu — maximum and minimum fan output, supervision capacity, purge time and the pause between blowups. - [Boiler settings](https://uni.sonicar.tech/docs/controller/boiler-settings): Every parameter in the TIS Tronic 260U boiler settings menu — hysteresis, maximum and shutdown temperatures, pump start, fan type, firing-up time and cooling temperature. - [Hot water (HUW)](https://uni.sonicar.tech/docs/controller/hot-water): Configure domestic hot water on the TIS Tronic 260U — Summer and Winter modes, HUW priority, hysteresis, working hours and the boiler temperature increase function. - [Room thermostat control](https://uni.sonicar.tech/docs/controller/thermostat): How the TIS Tronic 260U uses a room thermostat on I2 — pump cycling once the room is satisfied, operating and pause times, and the overheat override. - [Quenching and fuel shortage](https://uni.sonicar.tech/docs/controller/quenching): How the TIS Tronic 260U detects that the fire is out — by boiler temperature or exhaust gas temperature — and what it does with the fan and the central heating pump. - [Alarms](https://uni.sonicar.tech/docs/controller/alarms): Every TIS Tronic 260U alarm — sensor errors, HUW overheating, lack of fuel, failed fire-up, emergency temperature and STB overheating — with causes and how to clear them. - [Wiring reference](https://uni.sonicar.tech/docs/controller/wiring-reference): Complete TIS Tronic 260U terminal map, sensor schedule, output ratings and fuse specification, with the board diagram and hydraulic connection drawing. - 5 · Operation - [First firing](https://uni.sonicar.tech/docs/operation/first-firing): Light the UNI 60 for the first time — check the draft, set the controller, load the firebox, ignite, run Start Fire, and stay with the boiler. - [Daily operation](https://uni.sonicar.tech/docs/operation/daily-operation): Running the UNI 60 day to day — loading the firebox, removing ash, watching pressure and temperature, and the habits that keep efficiency up. - [Fuel properties](https://uni.sonicar.tech/docs/operation/fuel): The energy content of firewood by species and moisture, the effect of seasoning, and how fuel choice changes UNI 60 output and maintenance intervals. - [Seasonal shutdown and start-up](https://uni.sonicar.tech/docs/operation/seasonal): Close the UNI 60 down at the end of the heating season and bring it back safely — cleaning, freeze protection, water in the system and the pre-season electrical check. - 6 · Maintenance - [Maintenance schedule](https://uni.sonicar.tech/docs/maintenance/schedule): What a UNI 60 needs daily, weekly, mid-winter and seasonally — ash, heat exchanger, air ducts, chimney and the electrical check, in one table. - [Cleaning the boiler](https://uni.sonicar.tech/docs/maintenance/cleaning): How to clean a UNI 60 — ash removal, scraping the furnace and loading chamber, clearing the combustion air ducts and brushing the heat exchanger. - [Chimney care](https://uni.sonicar.tech/docs/maintenance/chimney-care): Keeping the UNI 60 flue safe and drawing — sweeping frequency, acidic condensation, joint deterioration and what changes the deposition rate. - [Parts and service](https://uni.sonicar.tech/docs/maintenance/parts-service): Replacing the TIS Tronic 260U fuse and sensors, the consumables not covered by warranty, and when a job must go to an accredited service centre. - 7 · Troubleshooting - [Common problems](https://uni.sonicar.tech/docs/troubleshooting/common-problems): Symptom-first troubleshooting for the UNI 60 — blank controller screen, fan humming but not turning, STB overheating, poor draft, failed fire-up and low output. - [Alarm codes](https://uni.sonicar.tech/docs/troubleshooting/alarm-codes): Complete TIS Tronic 260U alarm list with causes and resolutions — sensor errors, HUW overheating, lack of fuel, failed fire-up, emergency temperature and STB. - Reference - [Downloads](https://uni.sonicar.tech/docs/resources/downloads): Download the original MBtek UNI PDF manuals — boiler manual, install guide, TIS Tronic 260U controller manual, controller replacement guide and the specification sheet. - [Parameter reference](https://uni.sonicar.tech/docs/resources/parameter-reference): Every TIS Tronic 260U parameter in one table — menu location, range, factory default and the MBtek recommended value for the UNI 60. - [Clearance reference](https://uni.sonicar.tech/docs/resources/clearance-reference): The UNI 60 clearance table and both clearance drawings on one printable page, plus the service-space requirements and fire safety material ratings. - [Glossary](https://uni.sonicar.tech/docs/resources/glossary): Terms used across the UNI 60 documentation — HUW, STB, Brager Expert, supervision, quenching, hysteresis, buffer tank and more. - Support - [Frequently asked questions](https://uni.sonicar.tech/docs/support/faq): Answers to the questions owners and installers ask most about the MBtek UNI 60 wood gasification boiler — sizing, buffer tanks, hot water, fuel, maintenance and warranty. - [Warranty](https://uni.sonicar.tech/docs/support/warranty): UNI boiler warranty terms — 10 years on the body for closed systems, 3 years for open, 1 year on controller and fan, what is excluded and what voids cover. - [Contact MBtek](https://uni.sonicar.tech/docs/support/contact): How to reach MBtek for UNI 60 sizing, commissioning, parts and warranty support — phone, email, installer network and the product page.