Mestek 44488010, Installation And Operation Instructions Manual, Page: 60 / 68

Form 43343350
Dec 2017
-59-
23.0) REPLACING PARTS
Only use genuine Mestek, Inc. replacement parts. Parts are available from the factory for replacement by a
licensed person. Refer to the Replacement Parts Guide in Section 25.0) for all replacement parts.
23.1) REMOVAL OF MAIN BURNER AND ELECTRODES
The main burner can be inspected without removing the burner housing from the heat exchanger tube.
1. Disconnect electrical supply and Remove cover 1.
2. Remove screw securing burner casting to the gas manifold.
3. Disconnect Spark lead and sensing wire.
4. Pull burner forward from the gas manifold and then out through the side of the box as shown.
5. Check that the spark gap is 1/8” between the electrode and the burner casting as shown. Spark electrode
should be clean and free from debris.
6. Flame sensor should be clean and free from debris.
7. Check ceramic on the spark electrode, for replacement into the box the spark electrode is the ¼” terminal
which connects to the spark lead.
8. Check ceramic on flame sense electrode, for replacement into the box the flame sense electrode is the
3/16” terminal which connects to the violet wire. (in some models the terminal is ¼” painted violet)