7:20 (24), 0-004-7614-0 (GB) TAC AB, 1998-10-23
TAC 2413 Handbook Functional description
Fan alarm during waterborne heating
When there is a fan alarm, the
!
symbol flashes, and “TF” and “FF”
are shown in the display window.
The alarm is disabled during 60 seconds when TF is started. If it is
tripped, that will happen with a 60 second delay after the fan guard
closes the contact on input U4.
This alarm may be tripped as an A alarm or B alarm. The A alarm
will stop the AHU, trip the sum alarm and must be reset manually.
The B alarm will not stop the AHU, it will be reset automatically
and it will trip the sum alarm by option.
Fan alarm during electric heating
When electric heating is chosen, the fan alarm works in a different
fashion; it is tripped when the fan guard opens the contact on in-
put U4. The alarm is an A alarm which stops the AHU. This me-
ans that the sum alarm is activated and that the alarm must be re-
set manually.
P No. Parameter Min. Max. Factory set. Change Comment
P 72 Fan alarm tripped A alarm or B alarm
P 81 Fan alarm, choice of type 0 0=B, 1=B+sum, 2=A
7.6.2 Fire alarm
When the fire alarm is tripped, the symbols
!
and “°C” will
flash in the display window. The alarm is disabled for 60 seconds
after the start of TF. If the supply air temperature is above 70 °C,
the fire alarm for the supply air duct is tripped after a 60 second
delay. If the return air temperature is above 50 °C, the fire alarm for
the return air duct is tripped after a 60 second delay. This means that
short-circuiting the sensor connection or a connection in parallel via a
fire thermostat will trip the alarm.
This alarm may be tripped as an A alarm or B alarm. The A alarm
will stop the AHU, trip the sum alarm and must be reset manually.
The B alarm will not stop the AHU, it will be reset automatically
and it will trip the sum alarm by option. N.B.! If electric heating
has been chosen, no re-blowing is done when the alarm is trip-
ped. This must be considered during testing.
P No. Parameter Min. Max. Factory set. Change Comment
P 78 Fire alarm tripped A alarm or B alarm
P 82 Fire alarm, choice of type 2 0=B, 1=B+sum, 2=A
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