User manual:
RDO3x3A
3
1 General
DOMOTESTA RDO heating controllers are consequently designed to the requirements of customers and
installers.
DOMOTESTA heating controllers exist in three different ranges:
RDO3xxA: With simple operation concept and LC display, able to communicate and network able
RDO2xxA: With simple operation concept and LC display, for standard applications
RDO1xxA: With analogic operation concept, for simple standard applications
The large LCD allows a comprehensive overview of all important information. A rotary knob each serves
for operation-mode setting and temperature setpoint adjustment. All other functions are push-button
operated. This controller is especially designed for use in heating applications that involve cascade
operation, solar or district heating, gas heating or complex heating plants. Heating circuits are weather
compensated, DHW control is temperature guided. An optional room temperature sensor with or without
remote control unit allows automatic heating adaptation. Two configurable low-voltage outputs and freely
assignable digital inputs increase the functionality of the controller. The range-wide compatible terminal
assignment reduces wiring effort and eases application-specific controller selection.
It is available in following executions with different functions.
RDO353A000:
2-stage or modulating burner; boiler circulating pump,
1 mix-heating circuit (3-point valve and pump), DHW pump.
RDO383A000:
2-stage or modulating burner; boiler circulating pump,
2 mix-heating circuits (3-point valve and pump), DHW pump.
This manual contains in its front section all necessary information for the user concerning operation and
settings. The installer finds in the middle section details concerning installation and electrical wiring. In the
back section is the list of parameters and the programming protocol. This protocol is to be filled in by the
service engineer.
Important:
This manual, together with the wiring diagram should be kept near the heating, easily accessible to the
service engineer. The controller has been developed for use with a great variety of systems. It is possible
that herein mentioned functions or accessories are not part of your heating system.
1.1 Main
functions
Controller:
The controller consists in principle of three “independent” control circuits.
A heat generator, usually a boiler with burner or a heat pump or
solar collector with buffer storage, supplies the energy required.
The heating circuit (room heating) demands energy.
Its amount depends mainly on the desired room temperature,
the weather condition and the type of building.
The DHW heating demands energy.
It’s amount depends on the water temperature in the boiler
and hot water demand.
Generation of
heat energy
Room heating
Domestic hot
water heating
