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LDAP-IOM (01-22) 207733-A
NOTE: To ensure long life and satisfactory performance, a heater that is operated under normal
conditions should be inspected and cleaned at the start of each heating season. If the heater is
operating in an area where an unusual amount of dust or soot or other impurities are present in
the air, more frequent maintenance is recommended.
Service Checklist
The following section is designed to aid a qualified service person in maintaining and servicing this equipment . At a
minimum, perform the following annually (see
for component locations):
Inspect burner/control compartment annually to determine if cleaning is necessary
Clean all dirt, lint, and grease from combustion air openings and venter assembly
Clean all dirt, lint, and grease from fan blade, fan guard, and motor
Check heat exchanger both internally and externally
Check burner for scale, dust, or lint accumulation and clean if needed
Check gas valve to ensure that gas flow is being shut off completely
Check vent system for soundness and clean openings
Replace any parts that do not appear sound
Check for any damaged wiring and replace as necessary
Maintenance Procedures
Burner Maintenance
NOTE: Each heat section is equipped with a TCORE
2
® burner.
Visually inspect each burner assembly (see
) compartment . If there is an accumulation of dirt, dust, and/
or lint, clean the compartment and remove and clean the burner as follows:
1. Remove gas and electric supply:
a . Shut OFF gas supply ahead of union at manual shutoff valve outside cabinet .
b . Turn OFF electric supply .
c . Disconnect gas supply at union outside of cabinet .
⚠ WARNING ⚠
Use of eye protectection is recommended.
2. Remove burner assembly:
a . Remove access panel .
b . Detach gas train:
(1) Mark and disconnect wires at combination gas valve .
(2) Disconnect union on one or both sides of gas line inside of heater .
(3) Carefully remove burner orifice and orifice adapter locking nut .
(4) Slide orifice adapter out through bracket on burner and move gas train out of way .
c . Locate three upper burner body supports . At each support, remove one screw that secures support to burner
shield .
d . While holding venturi tube, slide entire burner assembly slightly upward to disengage burner from supports
on bottom .
e . Rotate open end of venturi tube outward toward access door opening and carefully pull burner assembly out
of cabinet .
