Communicating, Knx Thermostats; Suggestions For Energy Saving - Siemens RDG Series Application Manual

Fan function
(P03, P52...P62, P67):
Parameters on
communi cating
thermostats
Diagnostic parameters
22
RDG and RDF offer an extensive fan control concept with a wide choice of functions and
features. The required options can be selected via the control parameters:
– Fan mode automatic-manual or manual only (P03)
– Fan active in cooling mode only, active in heating mode only, disable (P52)
– Control output for 3-speed/1-speed fan (P53)
– Control output for ECM fan, DC 0...10 V signal (P55...P57) on RDG160..
– Fan minimum on time (P59)
– Operation in dead zone for conjunction with return air sensor or to avoid damage
due to moisture (P60, P61)
– Fan start kick from standstill to overcome inertia and friction (P58)
– Fan overrun to avoid overtemperatures after the electric heater turned off (P54)
– Fan start delay by ON/OFF control to avoid cold or warm air (P67)
Note: Fan operation must be disabled via control parameter (P52) for universal application.
On communicating thermostats, control parameters can be downloaded via
ACS and ETS Service Tools.
Note: RDG/RDF require an external KNX bus power supply if connected via OCI700.
TIP After installing and setting up the thermostat, you can check your confi guration by going
to the "Expert" level and selecting the diagnostic parameters dxx (d01, d02, etc.).

Communicating, KNX thermostats

In connection with Synco 700, the communicating, KNX thermostats operate in LTE-mode.
The units are tailored as well for use with Synco living or for integration in BACS via S-mode.
Refer to technical documentation CE1N3127 for detailed information on installing and
commissioning a KNX system.
TIP Suggestions for saving energy
– Use thermostats with 7-day program
– Use thermostats with modulating control outputs (e.g. DC 0...10 V or 3-position)
– Use thermostats with ECM fan control (DC 0...10 V)
– Use KNX communicating thermostats
– Activate auto fan function
– Connect external operating mode switchover for central operating mode control
– Connect window contacts to avoid energy losses when windows are open
– Connect keycard contact for switching the unit to Economy mode when rooms
are not occupied
– Defi ne optimum setpoint limitations (heating max. 20 °C, cooling min. 25 °C)
to minimize energy usage
– In application with electric heater, use function "Electric heater enable" (P38, P40...)
– Inform enduser of prolonged absences and presence function