TM 10-3510-220-24
3-21. WATER HEATER UV SCANNER AND FLAME SAFEGUARD ASSEMBLY (CONT)
SERVICE
1.
Disconnect UV scanner (19) at
burner head assembly (20) and
clean scanner lens with a clean
dry cloth (Item 3, App c).
2.
Connect UV scanner (19) to
burner head assembly.
REPLACE
1.
2.
3.
4.
5.
6.
7.
Loosen two screws (8) and flame
safeguard control circuit card (9).
Tag and disconnect two wires (17)
and (18) from terminals S1 and S2
on base terminal board (10).
Disconnect UV scanner (19) at
burner head assembly (20) and
remove conduit nut (21). Pull UV
scanner and wires from conduit (22).
Install UV scanner (19) with wires
in conduit (22) and secure with
conduit nut (21). Install UV
scanner on burner head assembly
(20).
Connect wires (17) and (18) to
terminals S1 and S2 on base
terminal board (10). Remove
tags.
Install flame safeguard control
circuit card (9) and secure with
two screws (8).
Perform follow-on installation.
Install tarp assembly
(TM 10-3510-220-10).
3-103
