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I-UBX-UBZ-UDX-UDZ (03-21) 1034344-0
Figure 16. Typical Burner Assembly
1. Remove gas and electric supply:
a. Shut OFF gas supply ahead of union at manual 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 (see Figure 16):
a. Remove access panel.
a. Detach gas train:
(1) Mark and disconnect wires at gas valve.
(2) Carefully remove burner orifice and orifice adapter locking nut.
(3) Slide orifice adapter out through bracket on burner while pushing gas train to right. This will move gas
train out of way.
b. Detach control assembly:
(1) Remove two screws that secure control assembly bracket.
(2) Being careful not to disconnect any wires, slide control assembly to right.
c. Remove secondary air baffle(s) (unit sizes 060–400 only):
(1) Locate flat plate(s) identified as secondary air baffle(s)—vertical along right side of burner. Quantity of
baffles could be one to four depending on heater size. Each baffle is held in place by one screw.
(2) For correct re-assembly on secondary air shield, mark location (top and bottom) of each baffle.
(3) Remove screw(s) and remove baffle(s) (all).
MAINTENANCE—CONTINUED
Maintenance Procedures—Continued
Burner Maintenance—Continued
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