Outline of Control (Hydrobox) ESIE11-05
62 Functional Description
6. Outline of Control (Hydrobox)
6.1 Freeze Prevention
Freeze-up
prevention by
thermo off
condition
The freeze-up prevention is only active when the unit is in thermo OFF condition and field
setting [8-04] has been set to 1 or 2.
[Start condition]
AND/OR*:
Outdoor ambient temperature < 4°C - A*
Leaving or return water temperature < 7°C - A*
* AND/OR depending of setting [8 - 04] for further details see chapter of setting.
[Operation]
Pump will operate and if leaving OR return water < 5°C - A* for 5 minutes, the unit will start up in
heating to prevent too low temperatures.
Normal unit
OPZL unit
[A-04]=0 [A-04]=1
A* 0°C 5°C 15°C
To Next Page
Loading...
