To Next Page

To Previous Page

Direct Digital Controller

Direct Digital Controller fw 4.013 – Ed. 01/2013 55

To carry out the electric connection between DDC and RB100 we suggest to refer to the “Electric installer

section” of the booklet provided with the RB200 device (Code D-LBR468).

To carry out the electric connection between DDC and RB200 we suggest to refer to the “Electric installer

section” of the booklet provided with the RB200 device (Code D-LBR632).

APPLYING THE DIRECT DIGITAL CONTROLLER

For internal installation, the Direct Digital Controller must be applied as a panel by carrying out the following

operations (see Figure 14):

 Create a 155 by 151 mm rectangular opening;

 Position the Direct Digital Controller over the opening created and mark the 4 points of the holes by which it

is to be fixed in place;

 Make 4 holes of 4 mm in diameter;

 proceed with the operation of applying the Direct Digital Controller over the opening in the panel with the

screws and nuts (supplied).

Figure 14 – DISTANCE BETWEEN FIXING HOLES FOR DIRECT DIGITAL CONTROLLER

The operating temperature range of the Direct Digital Controller is 0 ÷ 50 °C (32° ÷ 122°F). If the temperature

of the installation environment is below zero freezing, the Direct Digital Controller continues to function

correctly to -10 °C (14°F), but its LCD screen may not be able to display data.

4.2 DESCRIPTION OF AUXILIARY BOILER OPERATING METHODS FOR HOT

SERVICE ON BASE PLANT PART

Limited to the hot service on the base plant part (heating and/or base domestic hot water) obtained with a

mixed generation system (heat pump and auxiliary boilers), two different operating modes are available for the

auxiliary boilers, selected using specific parameters:

• Complement mode

This mode is used for plants in which the auxiliary boilers complement, but do not substitute, heat pumps

in all the plant operating field. This means that the heat pumps can also work at max. thermal load, and

therefore that the plant always requests delivery and return water temperatures that are compatible with

the maximum permitted temperatures of the heat pump. It follows that the installed power (sum of the

power of the heat pumps and the auxiliary boilers) is usually equal to the total power requested of the

plant.

NOTE

Robur Direct Digital Controller User Manual

Questions and Answers: