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Function
Sensor F6, return flow temperature HRU
Parameter
Heat recovery minimum temperature
7.2.3 Stand-by monitoring
The outdoor temperature (F3/AE2) is required for this function. The circulation pump of the
heating coil is activated outside of the times-of-use whenever the outdoor temperature falls
below the value Pump ON when the outdoor temperature is smaller. If the stand-by monitor-
ing is active, the
Function
Sensor F3, outdoor temperature or
assignments of inputs AE1 to AE4
Parameter
Pump ON when the outdoor temperature is
smaller
7.2.4 Stand-by control
If the outdoor temperature sensor (F3/AE2) and a return air temperature sensor (F4) exist,
the value Return air temperature minimum limit in the heating coil is controlled for the frost
protection in addition to the stand-by monitoring function during times-of-non-use. An active
stand-by control is indicated in the operating level of the controller by the symbol appearing
on the display.
Functions
Sensor F3, outdoor temperature or
assignments of inputs AE1 to AE4
Sensor F4, return flow temperature of heating
coil
7.3
Forced-operation of the pumps
If the connected pumps have not run during the past 24 hours, a force-operation of the
pumps is started to prevent them from jamming.
symbol appears on the display of the controller in the operating level.
WE
Configuration
Fb6 = ON
WE
Range of values
3 °C
1 to 10 °C
WE
Configuration
Fb3 = ON
OFF
Fb18 = ON, option: AE2F3
WE
Range of values
0 °C
–50 to 10 °C
WE
Configuration
Fb3 = ON
OFF
Fb18 = ON, option: AE2F3
Fb4 =ON
System-wide functions
EB 5477 EN
69
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