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Burners and Igniters
CAUTION
!
EQUIPMENT DAMAGE HAZARD
Failure to follow this caution can result in equipment
damage.
When working on gas train, do not hit or plug orifice
spuds.
Main Burners
To access burners, remove burner access panel and slide
out burner partition. At the beginning of each heating
season, inspect for deterioration or blockage due to
corrosion or other causes. Observe the main burner flames
and adjust, if necessary.
Orifice projection — Refer to Fig. 62 for maximum
projection dimension for orifice face to manifold tube.
1.00-in
(25.4 mm)
Manifold
Pipe
Fig. 62 - - Orifice Projection
Removal and Replacement of Gas Train
See Fig. 55, Fig. 60 and Fig. 63.
1. Shut off manual gas valve.
2. Shut off power to unit.
3. Slide out burner partition.
4. Disconnect gas piping at unit gas valve.
Fig. 63 - - Burner Tray Details
5. Remove wires connected to gas valve. Mark each
wire.
6. Remove igniter wires and sensor wires at the Integ-
rated Gas Unit Controller (IGC). See Fig. 64.
7. Remove the 2 screws that attach the burner rack to
the vestibule plate. See Fig. 60.
8. Slide the burner tray out of the unit See Fig. 63.
Orifice
9. To reinstall, reverse the procedure outlined above.
Cleaning and Adjustment
1. Remove burner rack from unit as described in Re-
moval and Replacement of Gas Train section, above.
2. Inspect burners; if dirty, remove burners from rack.
(Mark each burner to identify its position before re-
moving from the rack.)
3. Use a soft brush to clean burners and cross- - over port
C08211
as required.
4. Adjust spark gap. See Fig. 65, 66 and Fig. 67.
SPARK GAP
0.120/0.141 IN. (3.05/3.56 mm)
C06153
49
INTEGRATED GAS UNIT
RACEWAY
CONTROLLER (IGC)
HOLE IN END PANEL (HIDDEN)
Fig. 64 - - Unit Control Box/IGC Location
SEE DETAIL A
SEE DETAIL B
LOW HEAT
72,000 BTUH INPUT AND 60,000 BTUH INPUT
SEE DETAIL A
MEDIUM AND HIGH HEAT
115,000 BTUH INPUT,
150,000 BTUH INPUT,
90,000BTUH INPUT AND
120,000 BTUH INPUT
SPARK GAP MUST BE
POSITIONED TO IGNITE
ON FIRST TRY. PLACE
SPARK GAP WITHIN
BURNER CIRCUMFERENCE
AS SHOWN
DETAIL A
Fig. 65 - - Spark Adjustment (04- -07)
C08454
SEE DETAIL B
0.181 IN. (4.60 mm)
DETAIL B
C06154
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