Unigas C85A - Page 71

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6.5 Setting functions “TL_ThreshOff” and “TL_SD_On”
These functions enable the settable threshold for the immediate shutdown, if value set on TL_ThreshOff is exceeded. The automatic restart is performed
for values lower than the one set on TL_SD_On.
On display, values detected by temperature/pressure probe are shown at the same time.
TL_ThreshOff turns the burner off if temperature exceeds the set value. Gas/Oil valves are suddenly closed.
TL_SD_On automatically restart the burner if the temperature is lower than the set value.
SD_ModOff automatically turns the burner to low flame and then shut down the burner if temperature exceeds the set value.
SD_ModOn automatically restart the burner if the temperature is lower than the set value.
P-Part (Xp) proportional band of modulation.
Note: this function is available if a Pt100 Ni1000 or Pt 1000 temperature sensor is connected to X60.3 and X60.4 terminals.
ATTENTION: basically, these parameters provide a function similar to the safety thermostat one, but can not replace it. The boiler must
always operate with its safety thermostat connected properly.
NOTE: the parameter TL_ThreshOff for the immediate shutdown, must always be set to a value higher than the SD_ModOff threshold for the normal
shutdown. TL_SD_On must be set at a higher temperature than SD_ModOn.
Following the below route access to the programming levels of the menu by means the Esc
1st level 2nd level 3rd level 4th level Range Default Description
Params & Display
Menu level for making the
parameter set- tings
LoadController
Settings for the internal load
controller
TempLimiter
Settings for the temperature
limiter function
TL_ThreshOff 0...2000 °C 95°C
Temperature limiter OFF
threshold, in °C
TL_SD_On
-50...0%
TL_Thresh_Off
- 5%
Temperature limiter switching
differential ON
TL
_
ThreshOff
SD
_
ModOn
P-Part
(
X
p)
P-Part
(
X
p)
SD
_
ModOff
TL
_
SD
_
On