Lanair HI140i - Manual (Page 37)

SECTION 14 PRIMING THE FUEL PUMP
14.1 The fuel level in the supply tank must be above the check valve on the
pick-up tube.
14.2
Remove the bowl of the suction line strainer, and fill with clean fuel.
Replace the strainer bowl.
14.3
Remove the two yellow wires from the F-F terminal on the oil primary
control. Install a jumper wire between the F-F terminals. Refer to section
17, Trouble Shooting 17.2.
14.4
Adjust the air filter/regulator on the heater to –0- PSI.
14.5
Remove the fuel supply line from the burner, and position a container to
catch the fuel.
14.6
Back the thumb screw out (CCW) on the by-pass regulator until it is free,
the turn (CW) two turns to seat the diaphragm.
14.7
Loosen the bleeder screw on the pump one turn, and attach a piece of
3/16” ID clear plastic tubing. The tubing should be long enough to allow
the fuel to be returned to the tank.
14.8
Turn the room thermostat above room temperature, or to the “ON”
position.
14.9
Momentarily disconnect one end of the jumper wire at the F-F terminals
on the oil primary. The fuel pump will now start.
14.10 Observe the clear tubing attached to the bleeder screw on the pump.
When a steady stream of fuel (no air bubbles) flows close the bleeder
screw. Remove the tubing from the bleeder screw.
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