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Frost protection
This functionality becomes active in standby operation in any operation status, even if the
heating circuit would block the pump due to a shutdown condition.
The frost protection function becomes active, if the median outdoors temperature (see
menu Expert level/Mixer) goes below T.outside frost, if the flow temperature goes below
Act. T.flow< or, with a room sensor installed, the room temperature goes below T.room frost.
If frost protection is active, the set flow temperature is set to the specific flow temperature
according to the heat curve, which correlates to the room temperature „T.room frost“, but no
lower than „T.flow min.“.
The frost protection ends, if the temperature which caused it to start has exceeded its frost
protection threshold by 2K (fixed hysteresis).
Frost protection boiler
(only displayed for programs with boiler request and boiler sensor):
If the temperature of the boiler sensor falls below the
On
threshold, the output for the boiler
request is activated, until the boiler temperature has reached the
Off
threshold.
Adjusting time programs
Every heating circuit program features time windows labeled „Time prog. htg circ.“. The time
programs switch between normal and setback operation, according to the settings of the
room temperatures for these modes of operation. The heating pump is not deactivated by
these time programs.
Depending on the chosen program, additional time programs for DHW and generators may
be available, which regulate their respective outputs.
A total of 5 time programs is available, these are split up to
Heating circuit
,
DHW
and
Gener
-
ator
, depending on the chosen program.
Chosen time program (black background indicates, which one
is being edited)
Weekdays for which the time program is valid (black back
-
ground = activated)
3 time windows = beginning and ending times
If the option
Technician level/Parameters/Time prog. set val
-
ues
is set to
„
Yes
“, the time programs change such as to allow
adjusting of said set values below the different time windows.
Summary of Contents for UVR65
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