Parallel controls use separate motors to regulate fuel flow and airflow, enabling each motor to be tuned throughout the boiler ignition range. During installation, to points are usually drawn to create a curve of airflow corresponding to the fuel flow. The air-fuel ratio can be varied along the ignition range to prepare the optimal ratio in different ignition conditions. Also with the use of electronic dampers, this method of control is very reproducible.

If a building has multiple boilers, you may be able to use the boilers in sequence to prevent repeated cycles. If you use boilers that do not adjust, it is better to use the next boiler when the capacity of one boiler is full, instead of disconnecting and connecting several boilers that are loaded. On the other hand, in regulating boilers, the efficiency of the boiler increases in the load-sharing situation. Therefore, using several boilers at the same time in load sharing mode is more beneficial than using one boiler with % efficiency. Figure shows the relationship between ignition rate and efficiency in boilers with adjustable air and fuel flow utilization.

As mentioned earlier, any type of waste, such as soot or sediment, that covers the boiler heat transfer surface will reduce efficiency and increase the likelihood of parts and equipment failure. Cleaning of this surface is necessary according to the manufacturer&#;s recommendations for the life of the equipment and to maintain the optimal performance of the boiler. The waste that covers the boiler pipes prevents heat transfer and raises the temperature of the aerator gas. If incomplete combustion occurs, the resulting soot will accumulate in the part of the pipe where combustion has taken place. Similarly, inadequate water treatment in the water sections of the pipes causes sediment to accumulate in these sections. Only a .-inch-thick layer of soot or sediment can reduce heat transfer by up to . percent, and a .-inch-thick layer by percent.

Engine room boilers are high-pressure tanks designed to heat water or generate steam that can be used to heat the environment or to heat the building consuming hot water. In the heating of most commercial complexes, the source of heat for the engine room boiler are burners that work by burning natural gas. Diesel burners or fuel oil (rarely) can also be used. In some heating installations, the use of steam is preferred. Such as: absorption cooling systems, kitchens, laundries, disinfectants and steam-powered equipment.

All combustion equipment must be operated properly to prevent hazardous conditions, catastrophic damage, and human and construction damage. The main reason for the explosion of engine room boilers is the combustion of flammable gases that have accumulated inside the engine room boilers. This can happen for a variety of reasons, such as fuel, air, or the combustion process is interrupted for any reason, the flame goes out, and flammable gases accumulate that cause re-burning.