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Upgrade nowFully Pumped Systems: The S-Plan
Read through the material below, then test your understanding.
Module Lessons
Central Heating
Introduction to Central Heating & Part L
Heat Emitters: Radiators and Convectors
Radiator Valves: TRVs and Lockshields
System Layouts: One-Pipe and Two-Pipe
System Layouts: Microbore and Manifold
Boiler Types: Regular, System, and Combination
Condensing Boiler Principles
Open Vented Central Heating Systems
Sealed Central Heating Systems
Expansion Vessels and Pressure Relief
Central Heating Pumps and Circulators
System Controls: Programmers and Thermostats
Motorised Valves: 2-Port and 3-Port
Fully Pumped Systems: The Y-Plan
Fully Pumped Systems: The S-Plan
Filling, Venting, and System Balancing
Water Treatment and System Protection
Lesson Overview
The S-Plan is a fully pumped central heating and hot water system that uses two independent two-port motorised valves. It provides complete, separate control over heating and hot water circuits while preventing fuel wastage through boiler interlock.
Learning Objectives
Identify the layout, pipework arrangements, and components of an S-Plan central heating system.
Explain the operating sequence of two-port motorised zone valves and how boiler interlock is achieved.
Understand the installation and function of thermostats, automatic bypass valves, and system expansion devices.
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