The key elements of a boiler especially the fuel boilers, include: the burner, combustion chamber, heat exchanger, exhaust stack, the burner mixes the fuel and oxygen together and, with the assistance of an ignition device, provides a platform for combustion. This combustion takes place in the combustion chamber, and the heat that it generates is transferred to the water through the heat exchanger. Controls regulate the ignition, burner firing rate, fuel supply, air supply, exhaust draft, water temperature, steam pressure, and boiler pressure.

Hot water produced by a boiler is pumped through pipes and delivered to equipment throughout the building, which can include hot water coils in air handling units, service hot water heating equipment, and terminal units. Steam boilers produce steam that flows through pipes from areas of high pressure to areas of low pressure, unaided by an external energy source such as a pump. Steam utilized for heating can be directly utilized by steam using equipment or can provide heat through a heat exchanger that supplies hot water to the equipment.

Fig1.flow diagram of commercial boiler 1

For commercial boilers, the amount of work done is relatively large compared to the boilers used at homes.Therfor the commertial boilers are larger in size.

Fig 2. Picture of commercial boiler

What are the sign of a faulty commercial boiler?

1)Loud or strange noises from commercial furnaces.

2)Non igniting Commercial furnace burners which may be due to clogged furnace flue a, improper combination fan-limit control or faulty control board. 

3)The blower motor not turning off .This indicates a furnace air filter issue. When commercial furnace filters become clogged air flow is restricted. This eventually could damage the switch limit.

4)The furnace burner not staying lit. This is as a result of dirty flame sensor. Cleaning or condensate drain cleaning may resolve the problem.

5)The commercial furnace blower not turning. This may indicate there is an issue with the blower motor or the run capacitor.

6)Water leaks are another sign that issues are imminent. Even if there is no water dripping around the perimeter, steam leaks can be forced out of the stack

7)Power failure making the commercial boiler not to start. This could be as a result of:

a)The control board could be faulty.

b)Blower motor could have failed.

c)Also check to ensure the breaker isn’t tripped.

7)Degenerated or become scale coated water and safety probes resulting to the turning off and on of the boiler when it shouldn’t. The probes should be cleaned or replaced.

8)An unexpected switches off of boiler. This is due to a pressure loss, a blocked valve, a thermostat on the fritz, or non-working pump.

Regular maintenance and repair of your commercial boiler is cheaper than buying and installing a new or used commercial boiler.

Once you note a problem with your commercial boiler it good to call an experienced technician immediately.

Taking care of you commercial boiler safeguards your business!!!