V
11/2014
14
Operating Instructions
Temperature Control Unit 90smart/150smart
control knob. This setting is also possible in the parameter positions. The
set-point values can be selected via an external digital signal.
To toggle between set-point values
SP1
and
SP2
, press the
F3
button
and select the set-point toggling function. Set-point toggling is only possi-
ble if there is no alarm pending.
Parameter Menu
The parameter menu is activated by pressing the Parameter button. In
this menu, all the parameters can be configured by turning/pressing the
RCD control knob.
RT70 Control System - Functions
Powering Up
Upon switching on the main switch, the message
OFF
appears in the
display. The RT70 control system is now ready for operation and is
switched on by pressing the
ON/OFF
button, or by the timer, through a
digital input or an interface.
The display, depending on the programming, shows the set-point and ac-
tual values, as well as information on the operational state of the control
system or the temperature control unit.
Rotational field detection / Direction reversal
The rotary field detection of the RT70 control system detects a wrong
phase sequence and reports this in the display or corrects the direction of
rotation automatically.
Shutdown
The RT70 control system is switched off by pressing the
ON/OFF
button,
by the timer, via a digital input or an interface.
Depending on the temperature of the heat transfer medium, the shut-
down program runs as follows:
The pump and the control system are switched off. The RT70
control system will then be in standby mode and the message
OFF
appears on the display.
The pump continues to run. The unit cools down until the tem-
perature of the heat transfer medium has reached the pro-
grammed coastdown temperature. On reaching this temperature,
the pump and the control system are automatically switched off.
In the case of pressurised water units, the pump then continues
running for a further few seconds in the opposite direction (pres-
sure release). The RT70 control system will then be in standby
mode and the message
OFF
appears on the display.
Leak-stop operation
The leak-stop operation is activated by pressing the
F3
key and selecting
the leak-stop symbol and is only possible if it is supported by the device
type.
