6 - Service Manual N300 ModelsBefore ignition or start up of the refrigerator:- Make sure the air flow in the lower intake vent, throughthe refrigerator coils and condenser, and out the upperexhaust vent is not blocked or decreased.- Make sure there are no combustible materials in or aroundthe refrigerator.Ignition - propane gas operation:1. Open the valve at the propane gas storage tank.2. Open the manual shut off valve of the refrigerator.3. Turn the thermostat [1] to the 5 position (See Art00976).4. Turn the selector switch [2] to the gas position ( ).5. Push and hold in the safety valve [3] and in rapid succes-sion push in the igniter several times for about five seconds:WARNING: Do not hold the safety valve in more than30 seconds. If there is no flame in this time, wait atleast five minutes before you try ignition again. If youcontinue to hold in the safety valve, gas will collect in theburner area. This could cause a fire or explosion andresult in dangerous personal injury or death.- When a flame is present, and the flame meter [5] movesinto the green area, release the safety valve.- If the flame meter does not move into the green area ordoes not remain in the green area, wait about five minutesand do this step again.6. Turn the thermostat to the temperature setting that youwish.Start up - AC electric operation:- Make sure that 120 volts AC is available.- Turn the selector switch to the AC position ( ).- Turn the thermostat to the temperature setting that youwish.Start up - DC electric operation (3-way models):- Make sure that 12 volts DC is available.- Turn the selector switch to the DC position ( ).Shut down:- Turn the selector switch to the OFF position ( ).- Turn the thermostat to the 1 position.Ignition and Start Up Battery drain:- In AC operation, there is no battery drain.- In DC operation, the refrigerator draws 10-13 amps at 14- 15.4 volts.- If the battery charging stops during DC operation, changethe refrigerator to gas or AC operation until the batterycharging starts again.- Check the voltage when in DC operation. The voltageshould never drop below 13.5 volts.Refrigerator MaintenanceGas flame appearance:While in LP gas operation, examine the appearance of the gasflame:- Turn the thermostat to the 5 position.- Open the lower intake vent.CAUTION: The burner box cover can be hot. Weargloves to avoid burns.- Open the burner box door [3] and look at the gas flame [1](See Art00955 and Art00982).- The flame should be a darker blue inside and a lighterblue outside and should be a constant and steadyshape.- The flame should not be yellow and should not havean erratic and unstable shape.- Make sure the flame does not touch the inside of theflue tube [2].- Close the burner box door.Remove and clean the burner orifice:To remove and clean the burner orifice:- Close the valve at the propane gas tank(s).- Close the manual shut off valve of the refrigerator.- Turn the gas control to the OFF position ( ).- Open the lower intake vent.- Remove the burner box cover by removing one screw.WARNING: To avoid possible propane gas leaks,always use two wrenches to loosen and tighten the gassupply line at the refrigerator’s manual shut off valve.- Remove the flare nut from the orifice assembly [1] (SeeArt00956).- Remove the orifice assembly from the burner [2]