Can I install a DCD Controller with an existing gravity hot water and pumped central heating system ?
Yes. You can install in two easy stages if you wish. The first stage can be to wire up the controller without any plumbing changes – many people do just this for a start. You will need to drill a hole in an outside wall to take the DCD outside sensor, and to fit the DCD room sensor – this can replace your room thermostat, if you have one, using the existing wiring. The supplied sensors use 5 volts, so bell wire or telephone cable can be used for them if you do not already have existing wiring that is suitable. The second stage would then be to put in a water control valve in your gravity hot water feed and, at the same time, mount the DCD water temperature sensor on your hot water cylinder. This will enable the controller to control the water temperature, so that water is not heated unnecessarily and, at the same time, enable you to run the boiler more efficiently at its maximum temperature (for less time) for heating your house more quickly. Wiring diagrams are included in the install
