Title : DCD Heating Controller

Picture of Controller The Features
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Contents

Applications
Boiler Control
Central Heating Temperature Variation
Clock Operation
Combination Boilers
Condensing Boilers - Optimisation
Delayed Switch-On Period
Delayed Water Valve Closure
Frost Protection
Heat Maintenance - Minimum
Heating Programmes
Hot Water Temperature Variation
Installation - Simple & Straightforward

Memory Protection
Minimum Heat Maintenance
Optimisation - Boiler Firing
Optimum Start (Time Heat Required)
Outside Temperature
Override for Heating and Water
Programmes for Heating and Water
Pump and Valve Exercise
Pump Overrun
Smoothing of Central Heating

Water Boost
Valves

Enquiries - how to get in touch with DCD Systems

Return to Index



Heating Programmes and Temperature Settings Up to ten programmes can be set for each day of the week, making seventy in all. Each programme has its own start and stop times and temperatures for central heating and for water heating. Optimum Stop can be programmed. Programmes can be set with a 'Boost', which will automatically extend water heating beyond the 'Off' time, if the water has not reached the set temperature when the programme finishes..

Full Optimum Start All programmes are separately optimised for both central heating and water heating and can start up to four hours before the set start time, depending on both the room temperature and the outside temperature. Therefore, a programme can be terminated early, in order to allow a following programme with higher temperature requirements to start warming up. This ensures that you get the right temperature at the right time, yet avoids wasted energy by switching on at the latest possible time to meet the programmed requirements for your home. Full Optimum Start should not be confused with setback optimum start which is offered by some central heating controls that use factory set delays based on room temperatures without regard to weather conditions.

Smoothing of Central Heating and Pump Overrun Optimum boiler firing, to obtain a central heating temperature differential no greater than 0.1C, with Pump Overrun to assist the even distribution of heat and minimise the heat losses into the boiler flue and the surrounding atmosphere.

Boiler Control and Optimisation Regulates firing of the boiler, while still providing immediate full power whenever needed to achieve the set temperature. The return water flow temperature is kept to the minimum - this is an important advantage when the controller is used in conjunction with a Condensing Boiler and where this is necessary in order to maximise its operating efficiency.

Combination Boiler Handling Display that handles combination boilers and systems that do not require water heating control.

Delayed Water Valve Closure Enables utilisation of residual heat in the boiler.

Pump and Valve Exercise Keeps the pump and valves in good condition and avoids build-up of sediment in summer months.

Minimum Heat Maintenance Maintains a minimum of 12C when central heating is not in use.

Water Boost Heats water to your selected boost temperature and then turns off.

Overrides for Heating and Water Provides central heating variation - allows for instant changes to be made to programme 'On' and 'Off' times and temperatures. Other overrides enable constant temperature operation until cancelled, constant temperature operation throughout the day, etc. Reset button to cancel any overrides entered.

Holiday Switch-Off Switch off heating for absences from home. Automatic return to programmed operation (Delayed Switch-On) at the time you set for your return. Minimum temperature of 12C maintained while you are away.

Frost Protection The controller can operate frost protection heating in conjunction with a thermostat which, typically, may be located near to a boiler sited in an exposed position (e.g. a garage).

Outside Temperature Outside temperature display.

Memory Protection and Clock Operation Internal self-charging battery that comes into operation whenever the mains supply is interrupted. This will maintain the clock and all settings for more than six months, in the absence of mains power.

Installation Easy and inexpensive installation, without changes to existing plumbing and pipework. Set time and day of week, then leave to run with pre-installed programmes. All programmes self-optimise and many users do not find it necessary to make any changes. However, it is easy to modify and delete programmes to meet your own requirements, and to add other programmes, as necessary.

Diagrams that illustrate the connections to be made are available. There is no crossover wiring. Connections for the sensors may be made with low voltage cabling, such as bell wire or telephone cable. Direct connections may be made to mid position valves or to separate central heating and water control valves, and to various pump arrangements (including dual pumps when used in place of control valves).

ApplicationsThe Controller works with both pumped and gravity systems. It is suitable for use with most types of gas and oil fired boilers, including combination and condensing boilers, and with most types of valves, including diverter valves and mid-position valves. It is also suitable for use with thermostatic radiator valves and for the control of zones, electric underfloor heating, etc. Versions available for swimming pools, commercial premises and other applications.


Contents

Applications
Boiler Control
Central Heating Temperature Variation
Clock Operation
Combination Boilers
Condensing Boilers - Optimisation
Delayed Switch-On Period
Delayed Water Valve Closure
Frost Protection
Heat Maintenance - Minimum
Heating Programmes
Hot Water Temperature Variation
Installation - Simple & Straightforward

Memory Protection
Minimum Heat Maintenance
Optimisation - Boiler Firing
Optimum Start (Time Heat Required)
Outside Temperature
Override for Heating and Water
Programmes for Heating and Water
Pump and Valve Exercise
Pump Overrun
Smoothing of Central Heating

Water Boost
Valves

Enquiries - how to get in touch with DCD Systems

Return to Index


Last Updated in November 2008
©DCD Systems Limited 2008