The basis for selecting a boiler for heating the building should be the heat balance of the structure prepared in accordance with applicable regulations. To a large extent, we can use the following surface indicator of heat demand for the heated building: well-insulated with modern system 50÷70 W/m2, non-insulated with traditional system 90÷110 W/m2 or for high rooms (h >2.7 m), cubic indicator: residential buildings 30÷35 W/m3, production floors (without ventilation heat) 20÷25 W/m3.
Modern high efficiency solid fuel boilers are equipped with an elaborate heat exchanger and require adequate flue gas draught for proper operation (depending on the boiler type and power 15÷55 Pa). The smoke and ventilation (supply and exhaust) ducts in the boiler room should be checked by an licensed chimney sweep. The height and cross section of the stack must be selected according to the boiler power in accordance with the regulations. Recommended values are given in the OMM of the boiler.
To ensure proper operation of SAS boilers, observe the operating conditions written in the OMM of the appliance: working temp. 60÷80°C, min. temp. of return water to the boiler 50°C, max. permissible working temp. 85°C, permissible working pressure 1.5 bar.
The use of fuel dedicated for the given boiler type ensures safe and long operation of SAS boiler operation, declared power, appliance efficiency and fixed combustion period. When selecting the fuel, note in particular: calorific value, sinterability, granulation, ash content, sulphur content and humidity.
SAS boilers operate in open loop water-based central heating systems with gravitational or forced water circulation. Installation in closed loop requires additional safeguards in accordance with regulations: expansion vessel, safety valve, control and measurement equipment (manometer, thermometer, etc.) and installation one excess heat removal device (cooling coil, overheat protection valve). SAS boilers with the power of up to 100 kW are equipped with a stub pipe for mounting the thermal protection valve directly on the appliance.
To protect the boiler from too low heating water temperature, we recommend installing the boiler through a four-way valve. This solution is particularly advisable for well-insulated buildings. Maintaining low water temperatures in the boiler causes wet flue gas emissions, condensation sweating on the exchanger, contamination of the combustion chamber, which can cause moisture and corrosion of masonry stacks. Recommended heating water temperature in the range of 60÷80°C ensures proper and safe operation of the appliance. If the temperature of return water to the boiler of above 50°C cannot be maintained, it is required to secure the boiler by installing a four-way valve.
A proper dose of fresh air is required for the combustion in solid fuel boilers. The lack or obstruction of air supply ventilation can cause phenomena such as smoking or inability to obtain the required temperature. In particular, pellet boilers require adequate stack and ventilation draught. The lack of effective air supply ventilation can cause uncontrolled ignition of the gas mixture, resulting in an explosion. The safety of the people in the boiler room is ensured by exhaust ventilation - a duct routed above the roof with outlet opening under the ceiling of the room.
Controlling the system using the mixing valve and the option to connect a room controller intended to control the system from living areas improves thermal comfort, while minimising unnecessary overheating of the building. The fitting of the mixing valve with the actuator and outside temperature sensor enable adjusting the system according to the heating curve (weather-based control). In addition, the option of remote control of the boiler and entire installation operation by mobile application enables continuous supervision from anywhere around the world.