STIEBEL ELTRON SOM 8 PLUS - Page 54

54
Circulation
The circulation function can be used for controlling
a circulation pump.
For the control logic, 5 dierent variants are availa-
ble:
• Thermal
• Timer
• Therm. + Timer
• Demand
• Demand + Timer
If one of the variants is selected, the corresponding
adjustment channels will appear.
Thermal
The temperature at the allocated sensor is monito-
red. The allocated relay switches on when the adjus-
ted switch-on temperature is exceeded. If the tem-
perature falls below the switch-o temperature, the
relay switches o.
Timer
The relay is switched on during the adjusted time
frames, outside of them it switches o. For informati-
on on how to adjust the timer, see below.
Therm. + Timer
The relay operates when the switch-on conditions of
both above mentioned variants are fullled.
Relay
Sensor
Circulation
Demand + Timer
The relay operates when the switch-on conditions of
both above mentioned variants are fullled.
When the Timer, Therm. + Timer or Demand + Ti-
mer variant is activated, a timer is indicated in which
time frames for the function can be adjusted.
First of all, an overview of the current adjustment is
displayed. For each day of the week there is an over-
view display. The display can be switched back and
forth between the dierent days by pressing but-
tons
or
4
.
In order to adjust the timer, press button
5
.
First, the individual days of the week or all days of
the week can be selected. The last menu item after
the list of days is Continue. If Continue is selec-
ted, the Edit timer menu opens, in which the time
frames can be adjusted.
Demand
The allocated FS08 ow switch is monitored for con-
tinuity (circuit continuity is achieved when uid pas-
ses through the ow switch). If circuit continuity is
detected at the ow switch, the relay switches on for
the adjusted runtime. After the runtime has ended,
the relay is switched o. During the adjusted break
time, the relay remains switched o even if continui-
ty is detected at the ow switch.
Note:
If the ow switch is connected to the input
S1 ... S12, continuity must be detected for at
least 5 s for the controller to an impuls in-
put at least 1 s.
295931-36390-8667 SOM 8 plus_en.indb 54 20.10.2011 13:14:48