User Manual

8
3 TABS control
3.1 Overview
TABS require special control for zones, energy generation and distribution. They
can be dealt with in the same manner as for other heat and cold transfer systems.
Zone control distributes heat and cold within a TABS zone based on demand. The
same flow piping generally supplies multiple rooms, i.e. the rooms are grouped into
zones.
The TABS control application controls the flow temperature for a zone dependent
on climatic conditions using two modulating valves and a pump. The TABS control
application is divided into four modules (see Figure 3-1):
– Room temperature control to increase comfort level (1).
– Heating and cooling curves (including heating and cooling limits) to determine
flow temperature (2).
– Cycle operation to increase overall energy efficiency (3).
– Sequence control (4).
Figure 3-1
Modular design of TABS control application
BscMdl Basic module Hcrv Heating curve
Ccrv Cooling curve SeqCtl Sequence control
CycMod Cycle operation TRCtl Room temperature control
Basic module
At a minimum, the basic modules heating and cooling curves (2) as well as
sequence control (4) are required for zone control.
Supplementary modules
A room-temperature control module (1) can be used as an option to increase
comfort level. The cycle operation module (3) can be used as an option to operate
the zone pumps intermittently and to adjust the temperature of the concrete core in
an environmentally and less costly manner.
The principal functions are explained in greater detail below.