North Star M157294F Installation, Operation And Maintenance Manual page 15

Electrodes
On a yearly basis the electrodes should be
inspected and any necessary adjustments made.
1. Remove the 4 nuts that attach the burner to the
heating chamber.
disconnect the fuel lines or the electric cords.
2. Pull the burner out from underneath the heat
exchanger.
3. Clean off carbon deposits which may have
accumulated on the tips of the electrodes.
You do not have to
FIG01018
4. Reset the spacing as shown below.
1/8"
7/16"
Electrodes
1/16"
15