Overview of Primary Product

page 2
THE PURPOSE OF THE VACUUM RELIEF VALVE (VRV)
The vacuum relief valve provides combustion air to the
burner if the outside air supply is interrupted for any
reason. Typical situations would be blockage of the air
intake or duct, or wind effect which cause a negative
pressure at the air intake hood.
WARNING: Failure to perform the following can
cause severe personal injury, death, or substantial
property damage:
Read all instructions before starting.•
Follow all instructions in proper order.•
Turn off service switch on boiler and any other •
electrical disconnect switches.
Turn off the fuel supply valve(s) and disconnect •
fuel lines from the burner.
INSTALLATION
Rotate the burner oil solenoid valve as shown in 1.
Figure 1, steps A-D. Do not reconnect the oil line
(per E-F). The solenoid valve must be aligned as
shown to prevent interference with the Air Boot™.
Remove the two 2.
1
⁄4" bolts holding the oil pump to
the burner housing. Remove the oil pump.
Remove the screw which holds the air band to the 3.
housing. Remove the air band.
Install the sealing gaskets onto the burner housing. 4.
(See Figure 2)
Install mounting spacer onto Air Boot™. 5.
(See Figure 3)
Place the Air Boot™ on the housing, through the 6.
large opening in the back side of the Air Boot™
(See Figure 3). Press the AirBoot™ into position
and align roughly plumb with the burner. Align
the Air Boot™ mounting holes with the burner oil
pump mounting holes.
NOTE: Replace pump coupling with the coupling supplied with kit.
VRV OPERATION
With normal air flow through the air intake hood and
duct, the VRV stays closed. All combustion air comes
in through the air duct. If the pressure in the Air Boot™
drops, the valve door opens. Room air flows in through
the VRV to provide the air needed for combustion.
When the Air Boot™ pressure returns to normal, the
VRV closes.
Rotate Oil Solenoid valve and realign 90º fitting as
shown below. Do not reconnect the oil line as in E
and F until you have installed the Air Boot™
Figure 1
Figure 3
Figure 2