What causes a heat exchanger to overheat?
What causes a heat exchanger to overheat?
The most common cause of an overheated heat exchanger is as simple as a dirty air filter. A clogged air filter restricts airflow through the furnace, overheating the heat exchanger, and eventually resulting in stress cracks. An over-sized furnace can also cause overheating and heat exchanger cracks.
Why are there two heat exchangers in a boiler?
Condensing gas combi boilers used to have two heat exchangers, as it’s thought that this was more efficient. To begin with, the water was heated in the primary exchanger.
How do you run a heat exchanger on a wood burning furnace?
You need to have two cut-off valves in the return line – one with a drain. With the pump running (turn the thermostat up to 90 F so that the pump comes on), simply close the brass valve on the return line quickly, holding it for 3-4 seconds. Then open the valve. Repeat the procedure at least 4 times.
Can a heating engineer clean a heat exchanger?
You should contact a suitably qualified heating engineer who will be able to clean the heat exchanger for you. If you’d prefer, you can ask them to do this during your boiler’s annual service. The engineer will locate the exchanger and apply water at high pressure to blast out any dirt or debris.
Is the cast iron heat exchanger suitable for condensing?
Cast iron heat exchangers feature a sectional heat exchanger design and benefit from large waterways. That’s why they deal well with debris in circuits of older heating systems, making them a great choice for refurbishment projects. Cast iron boilers are usually not suitable for condensing due to risk of corrosion from acidic flue gases.
Why is a heat exchanger important in a boiler?
The heat exchanger is an essential component in boilers, responsible for allowing the efficient transfer of heat from burning gas to cold water. Without it, your boiler would fail to heat your water – which, is kind of important.
How big is a hot water heat exchanger?
Our units are designed to transfer hot water heat through seamless copper tubes with high density aluminum fins and minimal flow resistance. They’re commonly used in outdoor boiler applications when hooking up units to existing forced air furnaces. Find the unit that meets your requirements with sizes ranging from 60,000 BTU to 265.000 BTU.
How does a central boiler work in an outdoor furnace?
Central Boiler outdoor furnaces burn wood to heat water that is circulated through insulated pipes. Water can transfer its heat by direct circulation or by moving through one or more heat exchangers, or both. Of course, your situation is unique, so it’s important you talk to a Central Boiler dealer…
You should contact a suitably qualified heating engineer who will be able to clean the heat exchanger for you. If you’d prefer, you can ask them to do this during your boiler’s annual service. The engineer will locate the exchanger and apply water at high pressure to blast out any dirt or debris.