User Instructions for GECO GH21RA controller
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Page 23 Edition I
19.06.2013
Diagram for connecting the GA03HA room panel to the GH21RA controller
7.5.
Fuel feeder temperature detection
The GH21RA controller has the additional option to protect against temperature in the fuel
feeder tray rising above the permitted level, preventing the flame from heating the fuel.
Fuel feeder temperature detection works in automatic mode the boiler (Automatic,
maintain, alarm). When the temperature measurement exceeds that set in parameter S14, the
fuel feeder activates for the duration set in parameter S16, in order to remove lit fuel from the
feeder. The fan is turned off for the duration of the time set in S16.
When the time set in parameter S15 expires, the controller regains control of the maximum
feeder temperature.
When the feeder T > S14, the fan stops, and the fuel feeder is activated for the duration of
S16.The controller will display the message U17 ‘increased temperature in the feeder’.
At the same time, overheating is indicated in preview on the controller, by the backlit negated
overheating feeder symbol.
When feeder T > 90
0
C the fan is stopped completely, the fuel feeder is connected for twice the
duration of S16, and the display shows alarm AL11 ‘maximum feeder temperature exceeded’
.
IF S14=0 THE FEEDER SENSOR IS TURNED OFF, AND FEEDER
OVERHEATING AND FEEDER TEMPERATURE DETECTION DO
NOT WORK.