OIL CONDENSING BOILER
INSTALLATION AND USER MANUAL
INSTALLATION & USER MANUAL
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3.7.3 Fuel line air venting
Fig. 3.14. Fuel line air venting
A Fuel filter air vent screw
B Fuel pump air vent bolt
1
Open the fuel line valve to feed fuel.
2
Loosen the screw on fuel filter cap counterclockwise to remove air in the line. Tighten the screw when the fuel
oil spills out.
(This is applicable only when the fuel tank is higher than the fuel filter unit.)
3
If the fuel tank is lower than the filter unit, air cannot be removed with this method. In such case, loosen the
air vent bolt on the fuel pump and turn on boiler power supply.
4
After about 6~7 seconds, the fuel pump discharges air with ticking sound. The LED lamp on the controller
flashes and the boiler stops.
5
Turn off and on the power supply to the controller. All the air has been removed and fuel will be fed smoothly.
Then, close the air vent bolt and press Restart button to ignite the burner.