Operation Manual

Continuous valve actuator CHEOPS control
theben
As of: Jul-11 (Subject to change without notice) Page 4 of 71
1 Functional characteristics
The Cheops control drive actuator is both a continuous EIB room temperature controller and
an actuator, i.e. Cheops control measures the current room temperature (actual value) and
controls the radiator valve, in order to achieve the desired room temperature (set point value).
The valve position can be transferred on the bus. If a room accommodates several radiators,
these can be equipped with “Cheops drive” actuators and actuated by Cheops control.
In addition to the heating system, Cheops control can also control a cooling system.
In order to simply adapt to the set point values in respect of living comfort and energy saving,
Cheops control has 4 operating modes:
• Comfort
• Standby
• Night mode
• Frost protection mode
A set point value is assigned to each operating mode.
Comfort mode is used when the room is occupied
In Standby mode, the set point value is reduced slightly. This operating mode is used when
the room is not occupied but is expected to be shortly.
In Night mode, the set point value is drastically reduced, since the room is not expected to be
occupied for several hours.
In Frost protection mode, the room is controlled to a temperature that eliminates the risk of
damage to the radiators through freezing at low outdoor temperatures:
This can be desirable for 2 reasons:
- The room is not occupied for several days.
- A window has been opened and no further heating is required for the time being.
The operating modes are usually controlled by a timer.
For optimum control, however, presence indicator and/or presence button and window
contacts are recommended.
See also Chapter headed "Determining the current set point value".