User Instructions for GECO GH21TA controller
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Page 23 Edition I
19.06.2013
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’
.
7.6.
Boiler extinguished detection
7.6.1
Out of fuel
If, during automatic mode, the temperature of water from the boiler does not reach that set
in parameter S08 for the duration set in S09, the controller records that the boiler has gone
out and returns alarm AL13.
7.6.2
Sharp decline in temperature of water leaving the boiler
When in automatic mode the temperature of water leaving the boiler is lower than 10 C
and in a short time does not increase by 4 C, the CH pump and hot water pumps are turned off
and the controller enters boiler extinguished detection mode.
The controller waits for the time set in parameter S10, to check whether there is an
increase of 4 C.
o
When this temperature rise DOES occur, detection mode ends, and the heating and hot
water pumps are connected.
o
When this DOES NOT occur, this means that that fuel has gone out and the controller
returns alarm AL13.
7.7.
Anti-Stop function
The GH21TA controller includes an anti-stop option, a security measure which guards
against system deterioration during the summer months. The function turns on the device for
a few minutes every seven days, to ensure performance throughout the year.
There are three settings for this function:
• Standard – all devices in the system, except for the feeder tray
• Complete – all devices in the system
• Inactive – function inactive
IF S14=0 THE FEEDER SENSOR IS TURNED OFF, AND FEEDER
OVERHEATING AND FEEDER TEMPERATURE DETECTION DO
NOT WORK.
