Boiler fitting is a major job. It will take at least a whole day and is not something you should undertake unless you feel perfectly comfortable working with plumbing tools and have an extensive amount of DIY experience. In some states, you might need to have your boiler fitted by a professional in order to satisfy building codes. That said, a new boiler will offer much greater efficiency than your old one with up to 80 per cent efficiency.
Step 1 - Placing the Boiler
Before you start fitting the boiler, you’ll need to set it on a level surface close to the electrical, water and gas lines. Unless you’re making major changes to your house, the location of your old boiler stood is probably an ideal spot since much of the piping will already be in place.
You will need to unpack the new boiler. Using a level, make sure the new boiler is even in every direction. The gas and water to the house should already be turned off. If not, turn them both off before commencing.
Step 2 - Preparing the Boiler
To prepare the boiler, you must start by adding the outlet pipes which will join up to the piping that leads to the different zones of the house. The number of zones will depend on the size of your home. These pipes will conduct the heat to the radiators and each zone will have a separate connection.
To set these up, locate the outlet from your boiler and use your wrench to fix a main outlet pipe to it. Next, connect the zone pipes, also using the wrench, to the main pipe network.
Step 3 - Return and Feed Pipes
Every boiler needs feed and return pipes for the water. These are made of copper and are attached to the boiler tank. They will need to be attached using solder and a blowtorch. This is not a job for the inexperienced since the seal needs to be perfect. If you haven’t done much soldering of this type, have an experienced friend or professional do it instead. Wear safety glasses when soldering. You might need to bend the copper piping. If so, use a pipe bending tool to ensure a smooth curve with no kinks.
With the feed and return pipes in place, you can connect the water tank to the boiler. Once again, this will require soldering and copper pipe.
Step 4 - Adding the Flue
To vent the boiler, you will need to attach it to the smoke pipe you used on your old boiler. If necessary, add extra sheet metal pipe, securing it with duct tape.
Step 5 - Turning On the Gas
Finally, to finish the boiler fitting, use the black threaded pipe to connect the gas pipe to the boiler. When the connections are secure, you should turn the water on at the mains. Allow the boiler to fill, using the automatic feed valve.
To turn on the boiler, you should call in a professional who is able to check the flue venting and adjust the CO2 output. This will be mandatory in some states.