The following examples show two typical applications of a central time schedule in conjunction with local control of the room operating mode.
The room operating mode in rooms 1…2 of a building is determined by the time schedule. Window contacts are fitted in all rooms.
The following conditions are specified:
The rooms are used and controlled by the time schedule as follows:
– Night setback from 17:00 to 08:00 (Economy)
– Protection from 20:00 to 06:00
– Lunch break from 12:00 to 13:00 (Pre-Comfort).
The substitution (parameter P88) for Pre-Comfort via bus is set on the thermostats as follows:
– Room 1: Comfort (1)
– Room 2: Economy (0).
Example 1 (RDF301…)
Operating mode switchover
In room 1, the window is opened briefly, once in the morning, once in late afternoon and once at night (1). Only the opening in the morning has a direct impact on the effective room operating mode.
During lunch break, the time schedule changes to Pre-Comfort. The mode remains in Comfort as set by parameter "Transformation Pre-Comfort" (P88 = 1).
 |
Time schedule | 1 Comfort 2 Pre-Comfort 3 Economy 4 Protection |
 |
 |
Window contact Room 1 |
5 Window open 6 Window closed |
|
 |
Effective room operating mode Room 1 |
7 Comfort 8 Economy 9 Protection |
Example 2 (RDF301…)
Interaction of user operation (operating mode button) and central time schedule
In room 2, the window is opened briefly, once in the morning and once at night (1).
Only the opening in the morning has a direct impact on the effective room operating mode.
With the operating mode button, the operating mode can be changed between OFF and Auto or temporary Comfort extension respectively.
During lunch break, the time schedule changes to Pre-Comfort. The mode of the thermostat changes to Economy as set by parameter "Transformation Pre-Comfort". (P88 = 0) (6)
During lunch break, the user changes the operating mode to Comfort (temporary Comfort extension) by pressing the operating mode button. (2) At 13:00, the timer is reset due to mode change of the central time schedule
In the afternoon, the user switches the thermostat off by pressing the operating mode button. (3) At 17:00 the user setting is reset to Economy by the time schedule.
At 19:30, the user again extends the Comfort mode (4). At 20:00, the timer is reset by the time schedule.
After 20:00, pressing the operating mode button has no effect, as the central time switch sets the thermostat to Protection. (5)
 |
Time schedule Room operating mode |
1 Comfort 2 Pre-Comfort 3 Economy 4 Protection |
 |
 |
Operating mode button on the thermostat | 5 Pressed | |
|
Window contact Room 2 |
7 Window open 8 Window closed |
|
|
Effective room operating mode Room 2 |
9 Comfort 10 Economy 11Protection |
Example 3 (RDF600…)
Application with "Window Contact", "Standard Presence Detector" and central time schedule
In room 3 operating mode Comfort is possible between 6:00 and 20:00, based on time schedule or occupancy period. Outside this time the operating mode remains in Protection.
At 6:00 the central set the operating mode to Economy. (1)
In the morning, as soon as the presence is detected (8:00 – 12:00), the operating mode will be switched to Comfort. (2)
The user will briefly open the window and the operating mode switches to Protection. (3)
In the afternoon the time schedule set the Comfort mode from 13:00 to 17:00. (4)
After 17:00 the room is still occupied and the operating mode remains in Comfort (occupancy via presence detector). (5)
Later people open the window and left the room for a short time. Operating mode switches to Protection as long as the window is open. (6)
As soon as the room is unoccupied the thermostat switches to Economy. (7)
At 20:00 the room is set to protection according to time schedule. (8)
After this time, the occupancy detected via presence detection has not effect, as the central time switch sets the thermostat to Protection. (9)
|
Time schedule Room operating mode |
1 Comfort 2 Pre-Comfort 3 Economy 4 Protection |
 |
 |
Presence detector | 5 Occupied 6 Unoccupied |
|
|
Window contact Room 3 |
7 Window open 8 Window closed |
|
|
Effective room operating mode Room 3 |
9 Comfort 10 Economy 11 Protection |
Note:
RDF600KN, RDF600KN/VB SW version < V1.8 works like RDF301… with the operating mode switchover function.
Example 4
(RDF600KN
Application with hotel presence detection function via key card reader
In room 4, hotel presence detection is selected via parameter P77, and the multifunctional input X1/X2(set parameter P38 or P40 to 10) is connected to a card reader in a hotel application.
At 6:00 when the room is vacant, i.e. no key card inserted in the card reader, the thermostat’s operating mode is set to Economy. (1)
At 8:00 when the room is occupied, i.e. a key card inserted in the card reader, the operating mode returns from Economy to the previous mode1) (2)
A guest changes the operating mode to Comfort by pressing the operating mode button. (3)
The guest then opens a window and the operating mode immediately switches to Protection. As soon as the window is closed, the operating mode is returns to Comfort. (4)
If the guest leaves the hotel room or removes the key card, the operating mode returns to Economy, and the thermostat remains on Economy as the local HMI2) is locked, i.e. the operating mode cannot be changed if no key card is inserted. (5)
When the guest returns to the hotel (room occupied), the operating mode returns to the mode (Comfort) set previously by the guest. (6)
When the guest turns off the room thermostat before going to sleep, the room operating mode switches to Protection. (7)
As the guest wakes up, he/she turns on the thermostat and the operating mode switches to Comfort. (8)
As soon as the room is unoccupied (guest leaves the room), the thermostat returns to Economy to save energy. (9)
When the guest checks out of the hotel, the operating mode can be set to Protection via bus. (10)
Note:
1) The previous mode is the operating mode selected by either hotel guests via local HMI, or the operating mode sent via bus.
2) Local HMI means operation by means of buttons, including setpoint adjustments, fan speed, operating mode, etc.
| Setting operating mode via bus | 1 Check out |  |
|
|
Operating mode button on the thermostat | 3 Pressed | |
|
Key card reader | 5 Occupied 6 Unoccupied |
|
|
Window contact Room 4 |
7 Window open 8 Window closed |
|
|
Effective room operating mode Room 4 |
9 Comfort 10 Economy 11 Protection |
Note:
RDF600KN, RDF600KN/VB SW version < V1.8 works like RDF301… with the operating mode switchover function.