Jenn-Air JGCP748HM Instructions D'installation page 17

Use the following chart to find the exact orifice spud placement.
Natural Gas Orifice Spud/Hood Chart
Burner
Stamp
Rating
9,200 BTUs 130
70
18,000 BTUs 193
(REAR) 78
20,000 BTUs 203
(FRONT) 78
16,000 BTUs 180
NOTE: Refer to serial tag for more information on burner ratings
and locations.
6. Place Propane gas orifice spuds in plastic parts bag for
future use and keep with package containing literature.
NOTE: There may be extra orifices in your kit.
7. Replace the burner base and screws. Tighten screws only
until burner is snug to cooktop, do not over-tighten.
8. Replace burner cap.
9. Repeat steps 2 through 8 for the remaining burners.
Adjusting Simmer Low Setting on Surface Burner for
Natural Gas
1. Remove the surface burner control knobs and bezels (griddle
control knob does not have to be removed).
2. Locate the Simmer low-turndown adjustment screw through
the bezel on the left side of the ignition switch.
A. Simmer low-turndown adjustment screw
B. Ignition switch
3. With the burner ON, and set to Simmer Lo, adjust the
simmer flame down to the proper BTU level. Using a
1/8" x 4 " (3.2 mm x 108 mm) flat blade screwdriver,
1 /
4
turn the simmer low-turndown adjustment screw
counterclockwise until the flame becomes stable, does not
flicker, or appear to race around the burner. Once the flame
is stable, turn the burner rate to SIMMER HIGH setting. The
flame should increase to approximately 2X the flame height.
If not, the low-turndown may be able to be adjusted low and
still remain stable. Repeat this step for all surface burners,
except the grill burner.
NOTE: Use a knob to adjust the burner valve.
NOTE: If your cooktop has the IR grill, then skip ahead to the
Convert IR Grill Burner section.
Size Burner Style
1.30 mm Small burner - main
0.70 mm Small burner - simmer
1.93 mm Large burner – main
0.78 mm Large burner – simmer
2.03 mm Large burner – main
0.78 mm Large burner – simmer
1.80 mm Grill burner
A B
4. Replace the bezels using the 2 screws which attach to the
valve brackets.
NOTE: Make sure no wires are pinched when reinstalling
bezels.
5. Push the surface knobs onto the valve stems.
6. Replace burner grates.
To Convert IR Grill Burner for Natural Gas
1. Unplug range or disconnect power.
2. Remove grill knob and bezel. The other surface knobs and
bezels should still be off the cooktop.
3. Remove the two screws on each side of the cooktop that
hold the control console in place.
Console attachment
screws (2 per side)
Do not remove
this screw
4. Gently lift and pull console off. Place console on covered
surface to avoid scratching.
5. Remove the two screws holding the grill orifice holder
bracket.
B
A. Screws
B. Grill orifice holder bracket
A
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