Installation manual

5. Disconnect and Move the Gas Train - At the gas valve, mark and disconnect
the wires. Carefully remove the burner orice and orice adapter locking nut.
Slide the orice 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 Bafes) - Vertical along the right side of the burner,
locate the at plate(s) identied as the secondary air bafe(s). The quantity of
bafes could be one to four depending on heater size. Each bafe is held in
place by one screw. For re-assembly, on the secondary air shield, mark
the location (top and bottom) of each bafe. Remove all bafes.
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. Carefully pull the
burner assembly out of the cabinet.
With the burner assembly removed, shine a ashlight on the burner ribbons. Look
for carbon buildup, scale, dust, lint, and/or anything that might restrict ow 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.
Clean all foreign material from the burner and venturi. After the burner is thor-
oughly clean, replace the end cap making certain that it is tight against the burner
housing. NOTE: If any of the burner components are damaged or deteriorated,
replace the burner assembly.
Inspect and Clean the
Burner
Inspect the Lower
Portion of the Heat
Exchanger (with burner
assembly removed)
Instructions to Re-Install the Burner (Refer to FIGURE 27)
1. Attach the Burner Assembly - Holding the venturi tube, slide the entire
burner assembly into position. Align the supports on the left side with the slots
in the burner shield; sliding the supports into the slots. On the right, re-attach
each burner body support to the secondary air shield.
2. Attach the Secondary Air Bafes - Re-attach the secondary air bafes as
marked. Bafes may be different sizes and each must be attached in the
correct location.
3. Attach the Control Assembly - Carefully slide the control assembly
into position. Re-attach with the same screws. Check to be sure all wire
connections are secure.
4. Attach the Gas Train - Slide the gas train so that the orice adapter is
through the bracket. Fasten the gas train to the bracket with the locking nut.
Install the gas orice. Re-connect the wires to the gas valve.
5. Close the access panel.
6. Reconnect the gas supply at the union outside of the cabinet. Leak test the
connection with leak detecting solution.
7. Turn on the electric and the gas. Check for proper operation.
Re-Install the Burner
12.2.3 Burner Orice
Burner orice usually only needs to be replaced when installing a gas conversion
kit. If ordering a replacement orice only, give BTUH content and specic gravity of
gas, as well as the model and serial number of the unit. When removing or replac-
ing the burner orice, be careful not to damage the venturi tube and/or the bracket.
12.2 Maintenance
Procedures
(cont’d)
12.2.2 Burner Maintenance (cont’d)
12.0 Maintenance
and Service
(cont’d)
At the burner ame entrance of each tube, shine a bright light into each heat
exchanger section. With the light shining into the heat exchanger, observe the
outside for visible light. Repeat this procedure with each heat exchanger section.
If any light is observed, replace the heat exchanger.
Form I-UEAS, Page 38