Commissionning; Furnace Operation Equipped With Safety Box 577 Dbc - DeDietrich Elitec DTG 1304 Eco.NOx/V Technical Instructions

3 Commissionning

The first start-up is to be performed by your installation
engineer.
- Open the gas blocking tap.
- Check that the safety thermostat has not triggered. Remove the
safety thermostat hood and press the reset button with a
screwdriver.
- Place the stop/start switch

4 Furnace operation equipped with safety box 577 DBC

Operating principle
The ignition and burner surveillance sequences are ensured by the
safety box.
Normal operating cycle
Required input signals
Box output signals
Contact closed
The box closes the TCH contact when there is a requirement for heat.
The ignition transformer TA integrated into the safety control box and
the ignition burner valve VBA (supply to the ignition burner) are
switched on.
Gas from the ignition burner is ignited by the ignition electrode and
within the time interval ts; a minimum current of 0.3 µA appears on
the ionisation sensor SF and the gas valve regulation flap (supplying
the principal burner) opens.
23/06/05 - 300002940-001B
on On.
DTG 1300 Eco.NOx/V
- Create a requirement for heat.
Please consult the document delivered with the command
panel before carrying out any action with it.
- The safety box carries out its ignition cycle.
Switching off : Place the start/stop switch on Off.
Operating cycle on safety (start up without flame signal)
Required input signals
Box output signals
Contact closed
- If a flame is not detected before the safety time ts, the box makes
2 more ignition attempts. If, at the end of the last attempt, there is
still no flame signal, the box goes into safety and the safety
indicator comes on. To restart the heater, press the reset button on
the safety box.
- If there is a loss of flame in normal operation, the box automatically
repeats the start up sequence.
Resetting : The box is reset after going into safety by pressing the
reset button. If the reset button does not work, wait at least 15
seconds before trying a second time.
The box may be on safety on its first start up : press the reset
button to release it.
If the reset button is pressed in normal operation, the gas valves
close and the box starts a new ignition sequence.
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