Installation manual

Burner Removal
Instructions (Refer to
FIGURE 27.)
12.2 Maintenance
Procedures
• Check the vent/combustion air system for soundness. Clean
openings. Replace any parts that do not appear sound.
• Check the wiring for any damaged wire. Replace damaged wiring.
(See Paragraph 8 for replacement wiring requirements.)
NOTE: If replacement parts are required, use only factory-authorized parts.
12.2.1 Heat Exchanger Maintenance
This heater has a T
CORE
3
®
heat exchanger (patent pending).
Remove any external dirt or dust accumulation. Visually check the heat exchanger
for cracks and holes. If a crack or hole is observed, replace the heat exchanger. A
T
CORE
3
®
heat exchanger has a primary and a secondary heat exchanger; check
both sections.
NOTE: Inspection of the lower portion of the heat exchanger is done with the
burner removed. See the Burner Service section below for information on inspect-
ing the lower portion of the heat exchanger.
12.2.2 Burner Maintenance
This heater is equipped with a TCORE
2
®
burner.
Inspect the burner/control compartment annually to determine if cleaning is neces-
sary. If there is an accumulation of dirt, dust, and/or lint, clean the compartment
and follow the instructions below to remove and clean the burner.
CAUTION: Use of eye protection is recommended.
1. Outside the cabinet, shut the gas supply off at the manual valve ahead of the
union.
2. Turn off electric supply.
3. Disconnect the gas supply at the union outside of the cabinet.
4. Remove the access panel.
FIGURE 27 - Burner Removal
Venter
Gas
Valve
Secondary
Air Shield
Burner Body Support (at least two per unit) -
Remove screw attaching to secondary air shield.
Support remains attached to the burner.
Burner Assembly
Burner
Orifice
Orifice
Adapter
Locking Nut
Secondary Air Baffle (Qty varies per size.)
Mark locations before removing.
Disconnect gas train at orifice and
outside the heater; slide to the right.
Venturi Tube
Slide right; rotate
inward; pull out.
Form I-UEAS, P/N 221232 R11, Page 37