V 11/2014
Temperature Control Unit 90smart/150smart Operating Instructions 15
The leak stop operation is only possible if water is used as the heat trans-
fer medium and the set-point value is in the vicinity of the value run-on
temperature (0-80 °C). Pressurised water units do not have any leak-stop
operation.
When oil is used as a heat transfer medium, the set-point value must be
within the range 0-250 °C. The heating capacity is then max. 60 %, since
the thermal load of the oil must be kept low owing to the reduced pump
capacity.
The leak-stop operation can be cancelled by pressing the ON/OFF but-
ton. When the ON/OFF button is pressed again (wait until the display
reads OFF), the unit switches back to normal operation.
Clearance for the Leak-Stop Function
The leak-stop function is not permitted with every device (e.g. if a change
in the direction of rotation of the delivery pump is not possible). The
clearance of the leak-stop function is set in the parameter menu.
DANGER
The leak-stop operation is an emergency operation and may only be switched on
or cleared for devices intended for the purpose. A leak-stop operation in the
case of devices not intended for the purpose can cause a fire.
Emptying (option)
The consumer device can be drained using the delivery pump (suction)
or by means of compressed air (blowing out); (setting in the parameter
menu).
Drainage by Suction with Pump
The suction program allows the draining of the consumer connected at
the temperature control unit and is activated by pressing the F3 button
and selecting the suction symbol. The pump is switched off, and after the
pump coastdown time has elapsed the pump is switched on again in the
opposite direction. The consumer is drained by suction during the defined
period (draining time).
Draining is only possible if the temperature of the heat transfer medium is
below the programmed coastdown temperature value. If that is not the
case, the heat transfer medium is first cooled to this value.
Blowing out with Compressed Air
The blowing out program enables the user to drain the consumer con-
nected to the temperature control unit by means of compressed air. Blow-
ing out is activated after the pump coastdown time has elapsed and di-
rects compressed air through the consumer. The temperature control unit
switches off automatically after the set period (draining time) has
elapsed.
The suction or blowing out program can be aborted by pressing the
ON/OFF button. When the ON/OFF button is pressed again (wait until the
display reads OFF), the unit switches back to normal operation.
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