1- Flame detection
Flame detection is carried out by a well insulated ionization probe which is made of a temperature resistant material.
(material and insulation same as for ignition electrode). Flame detection by way of an ionization probe is only possible in conjunction with mains supplies which provide a neutral earth connection.
2. Burner control
Functional check of the air-proving switch before the start and monitoring of air pressure during pre-purge as well as during normal operation. In normal use switch contacts with a rating of 4A/220v are sufficient.
Commissioning & maintenance
1. Important notes:
The wiring must be checked exactly when commissioning the installation. Incorrect wiring could damage the control box, putting the safety of burner system at risk.
The chosen fuse rating must not, on any account, be higher than the value given in the technical data. Failure to observe this instruction could, in the case of a short circuit, have serious consequences for the control box or burner system.
For safety reasons, it must be ensured that the control box performs at least one normal shut-down during every 24 hour period.
Switch off or disconnect the power before plugging in or unplugging the unit.
Burner control boxes are responsible for the safety of the system and should not be opened.
2. Possible faults:
2.1- Burner does not start:
- Fault in electrical supply, thermostat OFF
- Thermostat or gas-proving switch OFF
- Air proving switch not in no air position
2.2- Switches to lockout after attempted start without establishing flame:
- No ignition or no fuel reaching burner
- Flame signal during the pre-purge phase
2.3- Burner starts, flame is established but control box switches to lockout after elapse of safety interval:
- No flame signal or signal too weak
- Flame detector dirty or defective