Heat Demand; Delayed Start; Ventilation; Air Transport, Vane Switch - Winterwarm DXB Series Instruction Manual

5.2 Heat demand

The heat demand can be generated by means of the room thermostat or manually by pushing
the reset/service button on the heater.
If there is heat demand, the following cycle will start:
1. Internal checks: The heater performs several checks before there happens anything.
2. Pre purge: The electronic circuit board acknowledges the heat-demand and the fan will
start running for 15 seconds. (Display print
3. Ignition: After 15 seconds of pre purge, the electrode will spark for max. 5 seconds, the
fuel valve is opened and the fuel air mixture will ignite. (Display print
4. Burn: When the flame is detected (Display print
5. End of heat demand: When the heat demand ends, the burner will switch off and the
system fan will continue to run for ca. 1 minute in order to cool the unit down (Display
P
print ).
The unit will try to ignite 1 times before lockout on flame fault.
In the case of flame failure during operation, the heater will attempt one restart.
When the heater is in lockout you see in the display intermittent A1. On the display of the room
thermostat you see failure 1.
The heater error A(x) can be reset by pushing the service/reset button for 1 second.
Every hour the heater performs a safety shut down. After this shutdown the heater wil restart
automatically.

5.3 Delayed start

Often more than one heater are connected to one control unit. When all the units are starting on
at the same time, a pressure drop in the fuel supply and electrical power supply can occur. This
may result in some heaters not starting. To prevent this there is a random waiting time before
the heater starts.

5.4 Ventilation

By means of the optional external interface board, the fan in the heater can start without the
burning from the heater. The symbol F will be displayed on the heater.
The fan can also be operated manually by pushing the function button twice.
This manual ventilation setting will remain maximum 24 hour.

5.5 Air transport, vane switch

In the air stream inside the heater a vane switch is mounted. When the fan is running this switch
should be made. If not, Error E8. The heater will perform a retry for 5 times. When the vane
switch is still not closed the heater will lock with error A8 and has to be reset manually.
When during one heat demand the vane switch opens more than 5 times the heater will also
stop. Error A8.
When the heater is in standby and the vane switch is closed, the heater will give error E8 until
the switch is open again.
Instruction manual DXB heater
1
)
b
) the unit will go into burn mode.
2
)
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