GH10TA USER MANUAL
PAGE
13
Issue I
July 2017
6.7.
Boiler Burnout Detection
6.7.1.
No Fuel
If during automatic operation the boiler outlet water temperature remains below the
F08
setting
for a period of time set in the
F09
setting, then the Controller considers the boiler as “burned out” and
enters the
AL13
alarm condition.
6.7.2.
Sudden Drop of Outlet Water Temperature
If during automatic operation the boiler outlet water temperature drops by 10°C, and during that
dropping period the temperature does not rise by 4°C, then the CH and HUW pumps are switched off, and
the Controller goes into the burnout detection mode.
The Controller waits for the period of time set in the
F10
setting, during which it checks whether a rise of
4°C occurs.
If YES, then the burnout detection condition is stopped, and the CH and HUW pumps (if necessary) are
started.
If NOT, this means that the furnace is burned out – the Controller enters the
AL13
alarm condition.
6.8.
Maximum Feeder Temperature Detection
The GH10TA Controller is equipped with an additional option of protecting from temperature rise in the
fuel feeder above the permissible value to prevent backfires into the fuel feeder.
The detection is active only in the automatic boiler operation mode (AUTO, MAINTAIN).
When the measured temperature exceeds the value set in the
F14
service setting, the fuel feeder activates
for the period of time set in the
F16
service setting to eject the ignited fuel from the feeder. During the
F16
period the fan remains stopped.
When the time set in
F15
service setting elapses, the Controller restores the maximum feeder temperature
detection process.
When the feeder T > 90°C, then fan is stopped, the fuel feeder is started for a period of 2x
F16
, and the
display indicates the alarm condition
AL11 – “Maximum feeder temperature exceeded”
. (
⇒
section 6.5
page 11).
The Controller remains in the alarm condition until user response.
IF F14=0, THEN FEEDER SENSOR OPERATION IS OFF AND THE FUNCTION
OF FEEDER MAX. TEMPERATURE INCREASE DETECTION IS NOT ACTIVE.