SERVICE 5-2 Manual 0-2888
B. Every three months
A. Check internal air filter, replace if necessary.
1. Shut off input power; turn off the gas supply. Bleed down the gas supply.
2. Remove the upper cover screws.
3. Loosen the lower screws. Pull the cover up and away from the unit.
NOTE
Leave internal ground wire in place.
Upper screws
Ground
wire
Lower screws
Upper screws
A-03285
Cover Removal
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