Lauda RP 250 E - External control

2. Press the [square] button at the bottom right corner of the screen for
2 seconds.

The device is now in standby mode. The [square] button changes
to a [triangle].
3. Press the [triangle] button at the bottom right corner of the screen
for 2 seconds.

The device starts to operate again. The [triangle] button changes
to a [square].
6.5 Defining the actuating signal limit
The maximum heating output can be limited using the actuating signal limit.
The limit is set as a percentage of the maximum value.
The controller output limit for the heating output is designed to prevent
excessive temperatures on the surface of the heater. Excessive heater tem-
peratures may degrade the heat transfer liquid or damage the device.
1. Open the Home window.
2.
Touch the Settings  Control  Actuating variable tiles.
3. Touch the option [Maximum heating output].

An input window appears. The controller output limit can be set to
a value within the limit values displayed.
4. Change the value accordingly.
5. Press the [OK] button to return to the previous screen with the new
setting configured.

The new setting is active.
Set the controller output limit before adjusting the control parame-
ters.
6.6 External control
6.6.1 Activating external control, deactivating internal control
If you want the device to regulate to another control variable, you must set
a new control variable. The old control variable is then deactivated automati-
cally.
Connect a Pt100 temperature probe for monitoring the temperature in the
external consumer to the 10S interface on the constant temperature equip-
ment. The standard indicator for the external measured temperature T
ext
is
always the preset external control variable. If the remote control displays a
dierent temperature, this must be set explicitly.
If the external control is activated, the constant temperature equipment
regulates the temperature to the external temperature value T
ext
and not to
the bath temperature T
int
(bath thermostat) or the outflow temperature T
int
(circulation thermostat).
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