Burner installation

Abstract

A burner installation includes a burner housing ( 1 ), a burner mounted in the burner housing, and a burner flame monitoring device ( 14 ) for detecting the presence of a flame in the burner. The monitoring device ( 14 ) is able to provide a signal indicating the presence of the flame in the burner, the monitoring device being detachably mounted on the burner housing ( 1 ). A magnet ( 22 ) and sensor ( 17 ) for detecting the proximity of the magnet are provided. One of the magnet ( 22 ) and sensor ( 17 ) is secured in fixed relationship to the monitoring device ( 14 ) and the other of the magnet and sensor is secured in fixed relationship to the burner housing ( 1 ), whereby the sensor ( 17 ) is able to detect if the monitoring device ( 14 ) is detached from the burner housing.

1 . A burner installation comprising:
 a burner housing;   a burner mounted in the burner housing;   a burner flame monitoring device for detecting the presence of a flame in the burner, the monitoring device being able to provide a signal indicating the presence of the flame in the burner, the monitoring device being detachably mounted on the burner housing;   a magnet and sensor for detecting the proximity of the magnet, one of the magnet and sensor being secured in fixed relationship to the monitoring device and the other of the magnet and sensor being secured in fixed relationship to the burner housing, wherein the sensor is able to detect if the monitoring device is detached from the burner housing.   
   
   
       2 . A burner installation according to  claim 1 , further including a mounting device to which the burner flame monitoring device is secured, the mounting device being detachably mounted on the burner housing. 
   
   
       3 . A burner installation according to  claim 1 , wherein the magnet is secured in fixed relationship to the burner housing and the sensor is secured in fixed relationship to the monitoring device. 
   
   
       4 . A burner installation according to  claim 3 , wherein the magnet is generally ring shaped. 
   
   
       5 . A burner installation according to  claim 3 , wherein the magnet is provided on a cylindrical part of the burner housing, the sensor being received within the cylindrical part when the monitoring device is mounted on the burner housing. 
   
   
       6 . A burner installation according to  claim 5 , wherein the magnet is provided on the interior of the cylindrical part. 
   
   
       7 . A burner installation according to  claim 5 , wherein the cylindrical part is made of steel. 
   
   
       8 . A burner installation according to  claim 5 , wherein the sensor is positioned inside a tubular part received within the cylindrical part of the burner housing. 
   
   
       9 . A burner installation according to  claim 8 , wherein the sensor is positioned eccentrically within the tubular part of the mounting device. 
   
   
       10 . A burner installation according to  claim 8 , wherein the tubular part is made of a material of low magnetic permeability. 
   
   
       11 . A burner installation according to  claim 8 , wherein the tubular part is made of aluminium or an aluminium alloy. 
   
   
       12 . A burner installation according to  claim 1 , wherein the sensor comprises a magnetic reed switch. 
   
   
       13 . A burner installation according to  claim 1 , wherein the sensor is arranged to prevent an output signal from the flame monitoring device in the event that the proximity of the magnet is not detected. 
   
   
       14 . A burner installation according to  claim 1 , wherein the sensor and the flame sensor are mounted on a printed circuit board on which the flame sensor is also mounted. 
   
   
       15 . A burner installation according to  claim 1 , wherein the burner flame monitoring device is an infrared monitoring device. 
   
   
       16 . A burner installation according to  claim 1 , further comprising a control unit for controlling the flow of fuel and air to the burner, the control unit being arranged to prevent flow of fuel to the burner in the event that the proximity of the magnet is not detected by the sensor.