Air in the system? How, why and what to do?

Hydronic heating is based on the principle that a boiler warms glycol fluid. The fluid is distributed via pipes, convectors and other heating accessories throughout the whole vehicle. The heat convects up, enveloping the entire inside in an gentle and unobtrusive warmth.

Alde provides a buildable and adaptable system, which makes it suitable for a vast scope of vehicles.

Air can enter the system in different ways, leading to reduced efficiency. Understanding how air gets trapped can help in maintaining optimal performance.

• Initial Filling: Air can be introduced during the initial filling of the system.
• High Points in the System: Air naturally rises to the highest points in an RV system, such as the top of radiators or the highest loops of underfloor heating, forming air pockets that can disrupt the circulation of fluid.
• During routine maintenance or repairs: Air can enter the system when components are opened or replaced. This is common when replacing parts like pumps, valves, or radiators.
• Expansion and Contraction: As the water heats up and cools down, it expands and contracts. This process can cause air to be drawn into the system, particularly if there are any weak points or leaks.

Air pockets in the system can block circulation of heating fluid, reducing heat transfer efficiency and causing uneven heating. They can also create gurgling or banging noises and increase wear and tear on components, leading to more frequent maintenance needs.

Luckily, removing air from the system is quite straight forward.

Before attempting to air a system – make sure the system is warm and turned off. Follow the instructions below, and repeat if necessary.

1. Ensure that the system is warm and turn up the circulation pump on maximum speed. Let the pump run for 10 minutes. This should press any air bubbles out through the header tank. Remember to lower the pump after circulating the system.
   

   If above does not help, also perform steps 2-4:

2. Identify air vents: Locate the air vents on radiators or underfloor heating systems.
3. Bleed the system manually: Turn the air vent counter-clockwise to open. Allow air to escape, close the vent when you see fluid coming out.
4. Check circulation: ensure proper circulation through feeling high spots and heat emitters in the vehicle.

The ultimate tool for OEMs and service partners!

The Alde service pump is a specialized tool designed to simplify the process of filling and bleeding hydronic heating systems in caravans and motorhomes.

The pump allows for quick and efficient removal of air, ensuring optimal system performance. By using the Alde service pump, the time and effort os reduced  when installing and maintaining the Alde hydronic heating system.

Benefits with the Alde Service Pump

• Time saving
• Process ensures no air bubbles or pockets
• Very easy to use

For caravan and motorhome owners: contact your nearest Alde service partner to get a professional glycol change today!

For OEMs and/or resellers: get in touch with Alde to order the Alde Service Pump!