User Instructions for GECO GH21TA controller
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Page 24 Edition I
19.06.2013
The anti-stop function can only be activated in manual mode. When this function is active,
the user cannot control devices connected to the system. Manual control of external devices is
only possible when this function is turned off.
7.8.
Grate mode
The GH21TA controller allows the heating regulation algorithm to be changed to ‘grate
mode’, which does not support the feeder tray. It is usually used when the type of fuel is being
changed, for example to wood or green waste paper. The controller operates the boiler, fan
and pumps as normal. When this mode is activated the main screen shows the text ‘grate
mode H’ or ‘grate-mode M’ in heating mode.
This type of regulation can be changed by the user, by changing the parameters of the
standard mode in the system. Note that the change should be temporary, and that the system
performs optimally only with standard settings. Air supply to the system is provided by a
different controller model – GH21NA.
7.9.
Pump only mode
The GH21TA controller allows the heating regulation algorithm to be changed to ‘pump
only’ mode. In this mode, neither the feeder nor the fan are supported. It is usually used when
the type of fuel is being changed, for example to wood or any other combustible eco-fuel
without fan support. The controller only operates the pumps. When this mode is activated, the
main screen shows the text ‘pump only’ in heating mode.
This type of regulation can be changed by the user, by changing the parameters of the
system to turn off the standard heating regulation mode. Note that the change should be
temporary, and that the system performs optimally only with standard settings. Air supply to
the system is provided by a different controller model – GH21NA.
7.10.
Operation record
Operation
history is where information on all controller malfunctions and custom activities is
stored. All failures and irregularities identified by the programme are stored and archived according
to whether they are alarms or notes.
Additional information in this function includes details from the boiler manufacturer verifying
warranty information, such as
number of power failures, exceeding the maximum temperature,
etc.
7.11.
Emergency work
Safe mode allows the boiler to work in case of damage to the feeder and or fan TRIAC, until
servicing is possible. For the controller to operate the feeder / fan in safe mode, the correct mode
should be selected from the menu, in addition to changing the feeder/fan connection.
The control signals that it is in safe mode by displaying an exclamation mark in the centre
of the bottom of the screen.
