Product Overview & Application Area
The HKS Lazar SmartFire SF11 Standard is an automatically fed pellet boiler with 11 kW nominal heat output for central heating systems. Its output range of 3.3 to 11.0 kW allows the heat output to be adjusted to meet demand. Wood pellets are used as fuel.
The SmartFire SF11 can be used both for building heating and for integration into domestic hot water preparation via a suitable storage tank. Three variants with 150, 240, or 440 liter storage hoppers are available for fuel storage.
Technology & Equipment
The boiler uses a stainless steel burner with automatic ignition and automatic mechanical burner cleaning. Pellet feeding is carried out via a screw conveyor and a backburn protection device that structurally separates the fuel supply from the combustion chamber.
The control system handles not only boiler operation but also functions of the heating system and operates weather-compensated. The touch display is used to show operating states, temperatures, and system parameters.
The SmartFire SF11 Standard has mechanical heat exchanger cleaning, which is operated via a cleaning lever. Automatic burner cleaning remains standard regardless of this. The hydraulic integration includes a TV kit with return temperature boosting to 55 °C.
Everyday Benefits
Automatic pellet feeding, automatic ignition, and self-acting burner cleaning reduce the frequency of required operating procedures. The output is adjusted to the heat demand within the range of 3.3 to 11.0 kW.
The three available storage hoppers allow fuel storage to be adapted to available space and desired refill intervals. The control system supports not only boiler operation but also the integration of additional heating system components.
System Integration & Compatibility
The GEMA standard configuration is supplied without a lambda sensor, without automatic heat exchanger cleaning, and without automatic ash removal. Automatic mechanical burner cleaning and automatic pellet ignition remain part of the equipment.
Storage hopper 150 liters: overall width 985 mm, height 1490 mm, depth 760 mm.
Storage hopper 240 liters: overall width 1180 mm, height 1490 mm, depth 805 mm.
Storage hopper 440 liters: overall width 1345 mm, height 1490 mm, depth 1015 mm.
For automatic pellet supply from a larger or spatially separate pellet storage, the pneumatic HKS Lazar Vacum conveying system can be used as separate accessory.
Technical Data at a Glance
| Nominal heat output | 11 kW |
| Efficiency at nominal output | 91.2% |
| Energy efficiency class | A+ |
| Boiler class | Class 5 according to EN 303-5 |
| Ignition system | Automatic ignition |
| Heat exchanger cleaning | Mechanical / manual |
| Lambda sensor | No |
| Flue gas temperature at rated output | 105 °C |
| Flue gas outlet | Ø 100 mm outside / 93 mm inside |
| Max. boiler temperature | 85 °C |
Installation
Installation, hydraulic connection, chimney connection, and electrical installation must be carried out professionally and in accordance with applicable requirements. For safe operation, particular attention must be paid to the boiler return temperature; the supplied TV kit works with a thermostatic valve set for 55 °C.
A minimum of 800 mm of operating space must be planned in front of the boiler. At least 800 mm is required on the side of the hopper, at least 500 mm on the opposite side, and at least 600 mm of clearance above the boiler. For versions with 150- and 240-liter hoppers, at least 500 mm must be provided behind the boiler, and at least 600 mm for the 440-liter hopper.
Initial commissioning and the service work required to maintain the warranty must be carried out by an authorized service center in accordance with HKS Lazar's specifications.
Notes
Suitable wood pellets must be used for the SmartFire SF11. The storage container must remain closed during boiler operation and be refilled regularly.
The standard version does not have automatic heat exchanger cleaning. The heat exchanger is cleaned mechanically using the existing cleaning lever. The automatic burner cleaning operates independently of this.
The sizing of the boiler, heating surfaces, chimney, and the entire hydraulic system must be matched to the respective building and the existing or planned heating system.
Scope of delivery
- HKS Lazar SmartFire SF11 Standard pellet boiler 11 kW
- Storage container 150, 240, or 440 liters depending on the selected variant
- Hydraulic kit TV-Kit
- Ash pan drawer
- 3 temperature sensors for the central heating system
- Installation and operating instructions
- Control instructions