North Star 1574210, Owner'S Manual, Page: 29 / 64

29
Maintenance & Repair
9) Lift Using a couple of straps, wrap them around
the Coil and attach to a hoist to lift off. You may
also use the lifting eyes with hooks to lift with
hoist. This coil weighs at least 125 lbs. If no
hoist is available, it is recommended that this
become a 2-man job each with the ability to lift
at least 65 lbs.
10) Clean the coil.
11) Reassemble the coil and lids to the machine.
Make sure the white insulation remains in place.
12) Reattach high-pressure hose and thermostat
and make sure all fittings are tight before using
the machine.
Inspect/Clean/Adjust Electrodes
Inspect electrodes yearly and replace as needed.
1) Loosen front (2) bolts using a 1/2” socket. Loosen
side (2) bolts using a 1/2” socket and wrench.
2) Remove (3) screws using a 5/32” hex key Allen
wrench from the combustion head. Lift off
combustion head from outer cover.
3) Disconnect flame sensor and electrode wires.
Disconnect fuel line.
4) Clean off carbon deposits, which may have
accumulated on the tips of the electrodes.
5) If electrodes are outside of manufacturing
specification, Replace electrodes.
ITEM#
Label dimension
A B C
1574210
.188 .188 .109 1574211
1574212
1574213
.486 .348 .109
NOTICE: Wipe combustion head flame sensor lens
every 100 hours. If the flame sensor lens gets sooted up
the flame sensor will be unable to sense a flame and
therefore the burner will not fire. Do not contamminate
or touch the fuel nozzle tip.
Fig06843
Outer Cover
Inner Cover
Outer Wrap
Inner Wrap
Coil
Insulation
Gasket
Fig06288
FRONT BOLTS (2)
SIDE BOLTS (2)
Fig06842