FIELD CONTROLS WXGA+ 190CW7CS Manuel D’Utilisation

 

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The Vacuum Relief Valve is a safety device to guard against combustion problems associated with directly 
connecting oil burners to the outside. Typical problems can be caused by blockage of the intake termination, 
icing up of the duct work and effects of leeward side wind effects on a building. 

The VRV gate operates on changes in the vacuum pressure generated by the inlet to the oil burner. The VRV 
gate will remain closed during normal burner operation. During an abnormal operation (i.e., blockage of the 
intake or change in external building pressures) an increased negative pressure on the intake of the burner 
causes a reduction in burner air flow. Under this condition, the VRV gate opens, stabilizing and maintaining 
proper air flow to the burner. The VRV gate closes again once the abnormal condition is corrected. 

1.  Remove the oil pump and air bands from the 

burner housing.  Position the Air Boot™ over the 
burner housing on the intake. Align the holes in the 
Air Boot™ with the holes in the housing and re-
attach the oil pump. (See Figure 1) 

NOTE: Replace 

pump coupling with the coupling supplied with kit. 
Mount VRV tee assembly or 90° elbow onto the Air 
Boot™ intake. Fasten using three (3) sheet metal 
screws on all joints. (See Figure 2)