What is an s plan heating system?
A typical S Plan Heating System has two separate motorised valves which control the temperature of the central heating and the hot water individually. It also has a cylinder thermostat, a room thermostat, and a programmer. You will often find that an S Plan Heating System is used in modern properties.
What is the difference between s plan and Y plan?
By way of a reminder, a Y plan uses a mid-position valve to direct the primary flow through the heating circuit, hot water circuit, or both, while the S plan utilises at least two separate zone valves for both the heating and hot water functions.
Why is it called s plan?
The reason this system is called a ‘S’ plan heating system is because of the shape of the system when drawn schematically. Heated water from the boiler is diverted to the hot water coil or the radiators depending on which service the programmer is asking for and which thermostat is calling for heat.
How does s plan wiring work?
The motor inside the valve turns, and opens the body of the valve, to allow the heating pump to push water through it. When the motor has pushed the valve all the way open, it also pushes down a microswitch which makes a circuit between the Permanent Live (Grey) wire and the Switch Live (orange) wire.
What Colour is switch live on 2 port valve?
2 Port Valve Green/Yellow, Earth – connected to the metal body of the valve. Blue, Neutral – internally connected to the neutral side of the motor. Brown, Live in – Activates the motor inside the valve. Grey – Connected to one side of a switch inside the valve.
What is s Plan Plus?
Sundial S Plan Plus. The Sundial S Plan Plus satisfies the minimum requirements of Building Regulations Part L1 for dwellings over 150m². The system provides independent time and temperature control of multiple heating circuits and a separate hot water circuit in fully pumped systems.
What component does S or SW stand for?
Switch
Resistor. S. Switch. SW. Switch – an alternative widely used non-standard abbreviation.
What is s plan wiring?
This scheme uses separate two-port valves, one for hot water and another for heating. It can be easily extended to include additional heating zones by adding an extra valve and room thermostat for each zone – this is typically called S Plan Plus.
What is the Orange on 2 port valve?
A 2-port (or Zone valve) has a permanent 230v supply (usually on the grey wire) plus a Neutral and an Earth wire. There is then also a Motor Live wire (usually the brown) and a Switch Live wire (usually the orange).
What Colour are 3 phase wires?
The neutral is white, the hot (live or active) single phase wires are black , and red in the case of a second active. Three-phase lines are red, black, and blue.
What is S in electrical engineering?
The siemens (symbol: S) is the derived unit of electric conductance, electric susceptance, and electric admittance in the International System of Units (SI).
What does SW mean on a circuit board?
SW. Switch – an alternative widely used non-standard abbreviation. T.
Does Nest thermostat need C wire?
With a Nest Thermostat E or Nest Learning Thermostat, you’ll need to install a C wire if the thermostat has power issues or its battery often drains.
What is grey on zone valve?