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TAC 2112, Manual Functional Description
TAC AB, 1999-08-01 0-004-7459-3 (GB), 7:1(
22
)
7 Functional Description
7.1 Introduction
This chapter contains a description of all the functions in the
controller.
At the end of each section is a list of parameters. How to read off and
set these parameters is described in Chapter 3, “Using the operator’s
panel”.
7.2 Controller operating modes
The controller usually operates in a timed manner, i.e. a weekly
program and yearly program determine whether the supply
temperature or room temperature should be controlled to a daytime or
night setpoint. The controller can also be set to other operating modes
by changing the parameter P 00.
Timed operation
When the controller is set to the “timed operation” operating mode,
the following takes place:
•
The symbol on the left is displayed in the display window.
•
The supply temperature or the room temperature is controlled to
the setpoint for daytime or night operation as a function of the
weekly program.
Holiday period
When the controller is in the “timed operation” operating mode and a
holiday period occurs, the following takes place:
•
The symbols on the left are displayed in the display window.
•
The supply temperature or the room temperature is reduced to the
setpoint for night setback, independent of the outdoor
temperature; that is to say, not the setpoint for variable night
setback.