REPAIR PROCEDURES (CONT'D)
UV Scanner and Flame Safeguard Control Test and Repair (Cont'd).
12. To remove UV scanner, go to step 7 and remove flame safeguard
control circuit card.
Disconnect two wires at terminals S1 and S2.
Disconnect UV scanner (1) at burner head assembly and unscrew
conduit nut (2).
Pull UV scanner wires out of conduit.
13. To install UV scanner, insert UV scanner wires (3) in conduit (4).
Screw conduit nut (2) to UV scanner (1) until connection is tight.
Screw UV scanner (1) to scanner tube at burner head. Connect two
wires to terminals S1 and S2.
Install flame safeguard control
circuit card (step 10).