What is the purpose of a primary secondary loop?
The Primary-Secondary piping arrangement includes two sets of pumps, system pumps and boiler pumps. The system pumps distribute water to the terminal units and the boiler pumps circulate water through a loop that serves the heating equipment only.
What is primary and secondary piping?
Primary/ secondary piping is a versatile piping method that’s increasingly being used as the backbone of modern multi-load/multi-temperature hydronic systems. The concept of primary/secondary (P/S) piping has been around since the mid 1950s.
How do you pipe a primary secondary boiler?
Quote from the video:
Quote from Youtube video: So all I have to do is move this ball valve this way it's going to drive the water through the secondary circuit. And then I open the wall valve open open the ball valve again.
What is a combination condensing boiler?
A combi boiler, or ‘combination boiler’, is a boiler design that combines hot water and heating options into a single body. This means that you can compact two appliances down into one, saving on space and making it much more convenient for the user.
Do boilers need a primary loop?
Primary Loop Piping is commonly used in boiler heating systems that run needing multiple temperatures or contstant temperature at the hydronic boiler is required.
What is a primary heating circuit?
An assembly of water fittings in which water circulates between a boiler or other source of heat and a primary heat exchange inside a hot water storage vessel, and includes any space heating system.
What is a primary pipe?
The primary piping elements include steel pipes, connecting elements (flanges, pipe bends, pipe elbows, tees), stop and shut-off-and-regulating valves (slide gates and valves), drain devices, expansion joints, supporting structures and parts, hangers and fastening elements, thermal insulation.
What is primary flow and return?
The coil, or “heat exchanger” forms part of the central heating circuit, and its water heating abilities are purely a by-product of its main function, which is to heat the radiators. This heating is called the “primary” circuit, the pipes running to and from the boiler are called the primary flow and return.
What is a secondary hot water circuit?
A secondary hot water circuit circulates a loop of hot water around the property, in close proximity to the outlets. Such as the kitchen and bathrooms. Therefore, whenever a tap is turned on, the hot water is almost instantaneous, coming from the nearby loop.
What is the difference between a condensing boiler and a combination boiler?
So, a boiler that takes its water supply directly from the mains and produces heating and hot water for your home from one compact unit is a Combi boiler and with the addition of a Flue Gas Heat Recovery System it becomes a condensing unit too. Thus making it a condensing combi boiler.
Are all condensing boilers combi?
In fact, all modern boilers are condensing boilers, whether that be a combi, system or a regular boiler. You no longer need to be concerned about avoiding a non-condensing boiler, since legislation banned their sale in the UK back in 2005.
Is a condensing boiler different to a combi boiler?
A condensing boiler is any boiler which uses condensing technology to make better use of the heat they generate from burning fuels such as gas or oil – so a combi boiler can also be a condensing boiler. Today, the vast majority of boilers in UK households are gas condensing combi boilers.
When did condensing boilers become mandatory?
Since 2005, it has become mandatory to install condensing boilers if your old boiler needs replacing. Condensing boilers significantly reduce carbon emissions and you can save up to 1,200 kg of carbon a year by installing one in your home.
How can I tell if my boiler is condensing?
If you can see the steam coming from the flue through an external wall (or roof), and if you also have a white plastic pipe leading to a drain, this will certainly be from a condensing boiler.
Do you get instant hot water with a condensing boiler?
Advantages of a Condensing Boiler
It recycles waste gases and saves on your future energy bills. Space savings: a condensing combi boiler does not need a hot water tank and is available in a wide range of compact sizes, making it much suitable and convenient to fit in a kitchen cupboard than conventional boiler models.
What temperature should a condensing boiler be set at?
Your condensing boiler should be set to generate water at a flow temperature of at least 60C (hot water tanks should store water at this temperature). This is because this is the temperature that kills legionella bacteria.
Does a condensing boiler need a cold water tank?
Condensing boilers don’t necessarily need a hot water tank or cylinder in order to work — that will depend on the type of boiler you have in your home. Combi boilers do not use a hot water tank, but heat only or system models do.
Do you need a header tank with a condensing boiler?
NO. it works with natural gas.
Is a condensing boiler Pressurised?
The water for the central heating system is in a pressurised, closed loop system which is heated by the combi when required and pumped around through the radiators.
Does a system boiler need an expansion vessel?
Unlike regular boilers, system boilers do not require an expansion tank or external expansion vessels. This makes them both easier to install and less in need of space.
