WARNING!
Overflow of heat transfer liquid
Electric shock
Do not overfill the device. Observe the level display and the
thermal volume expansion of the heat transfer liquid.
WARNING!
Spraying of heat transfer liquid
Electric shock
Do not spray heat transfer liquid. Use a funnel for filling.
NOTICE!
Overheating of the pump
Device damage
Never operate the device without heat transfer liquid.
You have already connected the external consuming unit as described in
Chapters
Chapter 4.2.1 “Hoses” on page 23 and
necting an external consuming unit” on page 24.
Please refer to Chapter
Chapter 5.4 “Setting the pump pres-
when using pressure-sensitive consuming units.
1.
Close the drain screw. Turn the screw clockwise as far as it will go.
2.
Turn the bypass control knob counterclockwise to the fully open posi-
tion.
3.
Attach a suitable hose to the overflow connection on the device.
The permissible hose diameter for the overflow must be com-
plied with. More detailed information on the suitable hose
diameter can be found in the technical data
“Hydraulic circuit” on page 52
4.
Place the end of this hose into a suitable canister to collect the
overflowing heat transfer liquid.
If the pump is at a standstill and air enters the thermostatic
circuit (e.g. due to an incompletely closed or defective vent
valve), the consuming unit can run dry, even in a closed ther-
mostatic circuit with a consuming unit in a higher position.
Adjust the size of the overflow container to this if possible.
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