Resideo, manufacturer of Honeywell Home heating controls, has repackaged its readymade heating control packs to give installers everything they need for Sundial S or Y Plan applications.
These sets feature a combination of Honeywell Home zone valves, room thermostats and timers to suit a range of installation types – including single zone combi boiler installations, stored hot water control, and multi-zone heating systems.
Sundial Plans provide close control of a customer’s central heating system, ensuring heated water is diverted to the correct areas to fulfil space heating and domestic hot water (DHW) requirements.
They also ensure boiler interlock is achieved – that the boiler is switched off when there is no demand for heating or hot water – which is a requirement under part L1A of the Building Regulations.
The Sundial S Plan comprises two separate motorised valves, with independent time and temperature control of heating and hot water; a cylinder thermostat; a room thermostat; and a programmer. It is the simplest of the plans used in modern properties, and is the easiest to wire in, commission and fault find – given the ability to isolate the heating and DHW circuits. It can also be expanded to support multiple heating zones in what’s known as an S Plan+.
The S Plan installer pack includes:
*T6360 room thermostat
*Two channel ST9400 C 7-day programmer
*Cylinder thermostat
*2x V4D43 motorised zone valves
The Sundial Y plan is commonly found in older properties, and is still suitable for use when conducting part replacements or repairs. It typically comprises one three-port motorised valve for both heating and hot water, a room thermostat, cylinder thermostat and programmer. The main limitations are that only one heating zone can be controlled and that the maximum flow rate through the valve is for the combined heating and hot water supply.
The Y Plan installer pack includes:
*T6360 room thermostat
*Two channel ST9400 C 7-day programmer
*V4D73 motorised mid position diverter valves
Martin Wilson, Sales Director at Resideo, comments: “With heating controls becoming an increasingly important aspect of any modern heating system, it’s important that installers have access to the components they need, quickly and easily. These ready-made packs contain everything installers need for an S or Y plan installation, minimising the time spent at merchants and negating the risk of forgotten or missing parts.”
For more information on the S and Y Plan heating control packs, visit www.heatingcontrols.honeywellhome.com
