2.
Turn off electric supply.
3.
Disconnect the gas supply at the union outside of the cabinet.
4.
Remove the access panel.
5. Disconnect and Move the Gas Train
- At the gas valve, mark and
disconnect the wires. Carefully remove the burner orifice and orifice
adapter locking nut. Slide the orifice adapter out through the bracket
on the burner pushing the gas train to the right. This will move the gas
train out of the way.
6. Remove Secondary Air Baffles)
- Vertical along the right side of the
burner, locate the flat plate(s) identified as the secondary air baffle(s).
The quantity of baffles could be one to four depending on heater size.
Each baffle is held in place by one screw.
For re-assembly, on the
secondary air shield, mark the location (top and bottom) of each
baffle.
Remove all baffles.
7. Remove Burner Assembly
a)
Locate the burner body supports. Depending on the size, the burner
will have two or more supports. At each support, remove the one screw
that attaches it to the secondary air shield
b)
Holding the venturi tube, slide the entire burner assembly slightly to
the right to disengage the burner from the supports on the left. Then
rotate the open end of the venturi tube inward toward the heater. Care-
fully pull the burner assembly out of the cabinet.
With the burner assembly removed, shine a flashlight on the burner rib
-
bons. Look for carbon buildup, scale, dust, lint, and/or anything that might
restrict flow through the spaces between the burner ribbons. Holding the
burner assembly so that any foreign material will fall away from the burner,
use a stiff bristle brush to loosen and remove any foreign material(s). If the
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.
FIGURE 27 - Burner Removal
Inspect and Clean the
Burner
Form I-UEAS, P/N 221232 R6, Page 41
