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LDAP-IOM (01-22) 207733-A
MAINTENANCE—CONTINUED
Maintenance Procedures—Continued
Burner Maintenance—Continued
3. Inspect and clean burner:
NOTE: If, upon inspection, any of the burner components are damaged or deteriorated, replace
the burner assembly.
a . With burner assembly removed, shine flashlight on burner ribbons . Look for carbon buildup, scale, dust, lint,
and/or anything that might restrict flow through spaces between burner ribbons .
b . While holding burner assembly so that any foreign material will fall away from burner, use stiff bristle brush to
loosen and remove any foreign material(s) .
c . If burner is excessively dirty, remove one burner end cap:
(1) Remove four screws that secure end cap to burner housing .
(2) Lightly tap end cap to remove it .
d . Clean all foreign material from burner and venturi .
e . When burner is thoroughly clean, replace end cap, ensuring that it is tight against burner housing .
4. Inspect lower part of heat exchanger:
a . With burner assembly removed, shine bright light into each heat exchanger section at burner flame entrance
of each tube .
b . With light shining into heat exchanger, observe outside for visible light . Repeat for each heat exchanger section .
c . If any light is observed, replace heat exchanger .
5. Re-install burner assembly:
a . Attach burner assembly:
(1) While holding venturi tube, slide entire burner assembly into position .
(2) Align supports on bottom with slots in burner shield and slide supports into slots .
(3) On top, install screw that secures each burner body support to burner shield .
b . Attach gas train:
(1) Slide gas train into position so that orifice adapter is slid through bracket on burner .
(2) Secure gas train to bracket using locking nut .
(3) Install gas orifice and reconnect wires to gas valve .
(4) Reconnect union(s) inside of control compartment .
c . Install access panel .
d . Reconnect gas supply at union outside of cabinet .
e . Leak test connection using leak detecting solution . If leak is detected, tighten connection . If leak cannot be
stopped by tightening connection, replace part(s) .
6. Turn ON electric and gas.
7. Check for proper operation.
Burner Orifice Maintenance
The burner orifice usually needs to be replaced only when installing a gas conversion kit . When ordering a replacement
orifice only, provide BTUh content and specific gravity of gas as well as the model and serial number of the unit .
When removing or replacing the burner orifice, use two wrenches and take care not to damage the venturi tube
and/or the bracket .
