C 150 (E2) 06/2011
page 29/78
7.1
Selecting and setting the operating functions
The controller's lower display always shows the operating function (e.g. “SP” = temperature set point) and
the upper display shows the associated value (e.g. 37.0).
When the value in the upper display shows the temperature in °C or a CO
2
concentration in % CO
2
, the
corresponding yellow LED to the right of the display will light up.
Upper display: value of the operating function to be set
Lower display: type of operating function to be set
LED “ °C” lit: operating function value displayed in °C
LED “%CO
2
” lit: operating function value displayed in vol.-%
CO
2
LED “ °C” and LED “
%
CO
2
” off: no or other unit of operating
function value
Figure 20: Controller display when setting operating functions,
here: setting of temperature set point
In operating modes HAND and USER, access the next operating function by pressing “MODE”.
Pressing “MODE” will confirm the changed value of the current operating function, i.e., the C 150 will from
now on regulate at the new value.
If you do not want to accept the modification of a value, wait 30 seconds without pressing any
button. The controller reverts to Normal Display automatically without accepting the modifica-
tion.
Use “
▲
” and “
▼
” to change the value of the selected operating function or to select between defined
values.
To change numerical values by tenths, press “
▲
” and “
▼
” for a very short time. To change
them by whole numbers, press “
▲
” and “
▼
” for longer.
In some operating functions, you can read but not change the value (for service and maintenance pur-
poses).
To go back to the Normal display, press “MODE” repeatedly.
If a button for 30 seconds is not pressed after access to an operating function or changing a value, the
controller toggles back to Normal display automatically. If the “MODE” button is not pressed after chang-
ing a value in the displayed operating function, the value reverts to its previous value.
7.2
Operating mode HAND
•
In Normal display, press button “MODE” to toggle to operating mode HAND.
•
Use “MODE” to successively call up the operating functions.
•
Use
“
▲
” or “
▼
” to set the values of the operating functions.
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