25
Temperature hysteresis
TEMP HYS
The thermostat can be prevented from switching on and off the effect too often by
increasing the temperature hysteresis.
The hysteresis is the range the current value is permitted to deviate from the set
point without the thermostat switching on or off the effect. A set hysteresis value of
0.3 °C and a set point of +40.0 °C means that the temperature (current value) can
vary b39.7 °C and +40.3 °C.
The hysteresis can be increased if the system does not operate smoothly, i.e. the
thermostat continually switches on and off the effect. Excessive switching increases
wear on the relay and reduces the service life of the thermostat considerably.
The hysteresis setting is in the
TEMP
menu under
TEMP HYS
; increase and decrease
the value using
or
and then confirm with
. The factory setting is +0.8 °C
and is set in steps of 0.5 °C. The max value is +10.3 °C and the min is +0.3 °C.
Temperature alarm
ALARM
EB Therm 800 has both an upper and a lower temperature alarm. If the temperature
exceeds or falls below the set temperature, the installation is switched off, the alarm
circuit is opened and the display shows an alarm message at the same time as the
background lightning blinks. The menu settings are accessed as usual by pressing
.
The temperature alarm is not activated in the factory settings. The function is in the
ALARM
menu under
TEMP
in the
MAIN MENU
. Activate the temperature alarm in
the
ALARM
menu under
ON/OFF
, and there select
ON
to activate it. To deactivate
it, select
OFF
. The message that the alarm is on or off is shown for two seconds.
SUB TEMPERATURE ALARM
SUB TEMP
If the temperature (current value) falls below the set alarm temperature, the
installation is switched off, the alarm circuit is opened and the display shows
SUB
TEMP ALARM
at the same time as the background lighting blinks. The menu settings
are accessed as usual by pressing
. When the temperature rises above the set
alarm temperature again, or if the alarm temperature is set to below the current
value, the alarm circuit closes and the installation returns to normal operation.
The factory set sub temperature limit is +40 °C and the high temperature limit is
+100 °C.
EXCESS TEMPERATURE ALARM
EXCESS TEMP
If the temperature (current value) exceeds the set alarm temperature, the installation
is switched off, the alarm circuit is opened and the display shows
EXCESS TEMP
ALARM
at the same time as the background lighting blinks. When the temperature
falls below the set alarm temperature again, or if the alarm temperature rises above
the current value, the alarm circuit closes and the installation returns to normal
operation.
The factory set sub temperature limit is +60 °C and the excess temperature limit
is +150 °C.
