The Drayton LP522 Programmer MK4 is a mechanical heating and hot water timer that provides simple, reliable control over when your central heating and hot water systems switch on and off each day. It uses a user-friendly dial to set daily schedules without the need for digital programming.

Function & Purpose

This programmer features a 24-hour clock dial with movable pins (or segments) that determine when the heating and hot water circuits should be active or inactive. As time passes, the dial rotates and the pins activate internal switches that send on/off signals to the boiler or control system. It helps automate routine heating and hot water periods—such as morning and evening comfort times—reducing the need for manual control and helping improve energy efficiency.

Compatibility

The LP522 Programmer MK4 is compatible with most conventional central heating systems, including combi, system, and regular boilers that accept external timer inputs for heating and hot water control. Its mechanical interface works with standard boiler control circuits and wiring centres that support simple on/off demand signals. It does not require smart or wired thermostat connections, making it suitable for straightforward installations.

Ideal Applications

This programmer is ideal for:

Homes that need basic timed control of both heating and hot water without complex digital features
Older or traditional boiler installations where a simple dial timer is preferred
Users who want easy adjustment of daily on/off periods for heating and hot water
Situations where clear, reliable schedule control is needed without programmability beyond daily routines

The Drayton LP522 is valued for its ease of use, dependable mechanical operation, and suitability for straightforward heating and hot water scheduling in standard domestic environments.