Siemens REV24RF User Instruction page 8

E Periodic pump run
and anti-lime function:
DIP switch 6
F Start optimization:
DIP switches 7 and 8
G Operating mode heating
or cooling:
DIP switch 9
H Radio clock:
DIP switch 10
Note
on synchronization
8 / 18
Siemens
Building Technologies
For complex controlled systems, simple two-position controller with
0.5 °C switching difference (factory setting).
Press the DIP switch reset button to save the settings.
Only applicable with controlled circulating pump or valve!
This function protects the pump or valve during extended OFF periods against possible
seizure caused by liming. Periodic pump run is activated every 24 hours at 12 p.m. for
three minutes (symbol ▲ is displayed during active pump run).
DIP switch ON: Pump run On.
DIP switch OFF: Pump run On (factory setting).
Press the DIP switch reset button to save the settings.
Optimization advances the switch-on point P.1 to ensure that the selected setpoint is
reached at the desired time. The setting depends on the controlled system, i.e., on heat
transmission (piping system, radiators), building dynamics (building mass, insulation),
and heat output (boiler capacity, flow temperature).
DIP switches 7 ON and 8 ON:
DIP switches 7 ON and 8 OFF:
DIP switches 7 OFF and 8 ON:
DIP switches 7 OFF and 8 OFF: OFF
Press the DIP switch reset button to save the settings.
T
P
on
°C
20
TRx
19
18
17
16
- 2
- 4 h - 3 h
1h/°C
- 2 h - 1½ h - 1
1/2h/°C
- 1 h - ¾ h - ½
1/4h/°C
Key for diagram:
T Temperature (°C)
t Forward shift of switch-on point (h)
TRx Room temperature actual value
Pon Starting point for optimized heat-up time.
The controller can be switched over for cooling applications on DIP switch 9.
DIP switch 9 ON:
DIP switch 9 OFF:
Press the DIP switch reset button to save the settings.
Only applicable to REV..DC (with integrated DCF77 receiver to receive time signal from
Frankfurt, Germany)!
DIP switch ON: Clock run by controller-internal quartz.
DIP switch OFF: Time signal DCF77 from Frankfurt, Germany.
Press the DIP switch reset button to save the settings.
During startup, REV..DC synchronizes automatically to the time signal (DCF77) from
Frankfurt, Germany. Synchronization takes max. 10 minutes. Synchronization restarts
each time you press the button or move the program selection slider from the RUN
position during these 10 minutes. Siemens recommends to set the desired settings upon
startup, install the REV..DC in the desired location, and not carry out any actions on the
REV..DC for the next 10 minutes.
In normal operation, the REV..DC synchronizes to the radio clock every day at 3:10 a.m.
Room temperature controller radio set REV24RF../SET
1 h/°C For slow controlled systems.
¼ h/°C For fast controlled systems.
½ h/°C For medium controlled systems.
Off, no effect (factory setting).
T1
t
h - 1 h P.1
h - ½ h
h - ¼ h
Cooling
Heating (factory setting).
CE1N2206en
24.04.2008