TAC 2112 - Page 34

TAC 2112, Manual Functional Description
7:2 (22), 0-004-7459-3 (GB) 1999-08-01, TAC AB
Forced night setback
When the controller is in the “timed operation” operating mode and
the input X2 is connected to M (measurement neutral), the following
takes place:
•
The symbols on the left are displayed in the display window (the
moon flashes).
•
The supply temperature or the room temperature is reduced to the
setpoint for night setback.
Extended daytime operation
When the controller is in the “timed operation” operating mode and
input X1 is connected to M (measurement neutral), the following
takes place:
•
The symbols on the left are displayed in the display window (the
sun flashes).
•
The supply temperature or room temperature is controlled to the
setpoint for daytime operation.
Fixed night setback
When the controller is in the “fixed night setback” operating mode,
the following takes place:
•
The symbol on the left is displayed in the display window.
•
The supply temperature or room temperature is reduced to the
setpoint for night setback.
Fixed daytime operation
When the controller is in the “fixed daytime operation” operating
mode, the following takes place:
•
The symbol on the left is displayed in the display window.
•
The supply temperature or room temperature is controlled to the
setpoint for daytime operation.
Heating off (standby)
When the controller is in the “heating off” operating mode, the
following takes place:
•
The symbol on the left is displayed in the display window.
•
The setpoint of the supply controller is set to the lowest
permissible supply temperature (P 22).
•
The circulation pump stops irrespective of whether pump stop has
been selected or not. However, frost protection and pump exercise
remain operational.