Reznor UDBS Unit Installation Manual - Manual (Page 36)

Form I-UDB, P/N 202658 R14, Page 36
Inspect and Clean
the Burner
Burner Body Support (at least two per unit) -
Remove screw attaching to secondary air shield.
Support remains attached to the burner.
Secondary
Air Shield
Gas
Valve
Control Bracket Screws -
Loosen bracket; slide right.
Orifice
Orifice Adapter
Locking Nut
Secondary Air Baffle
(Qty varies per size.)
Mark locations before removing.
Burner
Assembly
Venturi Tube - Slide right; rotate inward; pull out.
Slide right
Slide righ t
Disconnect gas train
at orifice and outside
the cabinet; slide to
the right.
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.
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. Move the Control Assembly - Remove the two screws holding the control
assembly bracket. Being careful not to disconnect any wires, slide the control
assembly to the right.
7. Remove Secondary Air Baffles (Sizes 60-400 only) - 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.
8. 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. Carefully pull the burner assembly
out of the cabinet.
With the burner assembly removed, shine a flashlight on the burner ribbons. 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 burner is excessively dirty, remove one of the burner end
caps. Remove the four screws that hold the end cap to the burner housing. Lightly tap
the end cap to remove it.
FIGURE 23 - Burner
Removal (UDBP
illustrated; same
process
for both
UDBP and
UDBS)
10.0 Maintenance
and Service
(cont’d)
CAUTION: Use of
eye protection is
recommended.
Burner Removal Instructions (Refer to FIGURE 23.)
10.2.2 Burner Maintenance
This heater is equipped with a
T
CORE
2
® burner.
Inspect the burner/control compartment annually to determine if cleaning is necessary.
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.
10.2 Maintenance
Procedures
(cont’d)