Install A Condensing Combi Boiler

The most common type of combi boiler is the condensing. This was meant to be installed into a small home or apartment that has the proper amount of insulation. They are offered in both central and localized boilers that have fewer parts. These fewer parts makes it easy to install – but more confusing to operate and to maintain because it does not use the traditional hot water storage tank.

Most of us will spend a couple hundred dollars to hire a boiler contractor that will install the unit for us. However, if you are familiar with how they work and believe that you have the necessary tools than you can try to do it yourself. In order to do this you need to know each step that must be taken.

  • The first thing you need to do is know where the boiler is going to be kept. It should be a place where the exhaust gases are able to be expelled safely outside and away from anything that can combust. Make sure that it has enough space all around it to give it clearance and to keep things from getting damaged when it heats the water up.
  • The radiators will be placed below the windows and should be at least 150 millimeters underneath the windowsill. There must also be 75 millimeters of space around each end to give enough clearance for the valve.
  • Know how large the piping should be and map out the route of it all. They must all be facing away from doorways and have no obstruction in their way. Place them along the first floor boards and branch them out to finish the route you mapped out. The pipes must be fitted so that it runs from the flow pipe to the side of each radiator. There should be enough space for air vent at each vertical rise.
  • The tail valves must be fitted to the radiator taping and sealed off with special Poly Tetra Fluoro Ethlyene tape. Attach the thermostatic radiator valves and on/off switch onto the flow in the radiator. Mark the flow and attach the air vent plug over the lock shield valve. Connect the radiator and lock shield bodies to the tails of the radiator.
  • Now connect the cold water inlet from the rising main to the boiler. Use a copper pipe that will loop the unit to the cold water supply pipe. Once you have finished the piping you will be ready to add the gas supply. This can only be done by a professional registered fitter.