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Building Technologies Integration von DESIGO™ RXC in VISONIK CM2Z8338en_01

Building Automation Integration functions 12.06.2006

3.3 Definition of HVAC groups

HVAC groups are defined to take account of various HVAC and organizational aspects

affecting the building, such as:

– The direction in which the building faces (HVAC zones / groups based on HVAC

requirements)

– The use of a number of rooms at given times (groups based on occupancy pattern)

In the context of the integration of RXC into VISONIK, the basic element for the

definition of HVAC groups is the room. The diagram below is an example of a floor plan

to which the following conditions apply:

– The north and south facing sides of the building each consist of 6 modules, each

comprising an RXC controller and the associated field devices. The corresponding

TEC rooms (master/slave relationships) are defined on the basis of these modules

(master/slave relationships).

– The offices and the production area are in different HVAC zones, but share the same

occupancy times (07:30 to 18:00).

– The warehouse is maintained at a constant temperature round the clock.

TCR 1 TCR 2

TCG 1

TCG 2

RXC

RXC RXC RXC RXC RXC

RXC

TCR 5

TCR 6

TCR 3 TCR 4

South

North

8338Z17D

Ware-

house

Production

Offices

For the example above, “TEC rooms” and HVAC groups are defined as follows:

Name Element Details

TCR 1 .. 4 TEC Rooms 1 … 4 Offices: Comfort setpoints, heating/cooling 18 °C /

24 °C

TCR 5 TEC Room 5 Production area: Comfort setpoints, heating/cooling

21 °C / 24 °C

TCR 6 TEC Room 6 Warehouse: Constant 20 °C, no time program

TCG1 HVAC Group 1 North-facing zone: Summer compensation

TCG 2 HVAC Group 2 South-facing zone: Summer compensation

Note the following when defining HVAC groups:

– Only rooms can be added to HVAC groups.

– Max. 10 RXC controllers per TEC room, and max. 20 TEC rooms per HVAC group.

– A room may not be assigned to more than one HVAC group.

Introduction

The room as the

basic element for

RXC integration

Notes on the diagram

Notes on defining groups