Unigas HTLX 1025.1, Installation Manual

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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 (Xp)
P-Part (Xp)
SD_ModOff
TL_SD_On