GE JGP628, Technical Service Manual

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Adjusting Low Flame Setting

WARNING: The following adjustments must be
made before turning on the burner. Failure to do so
could result in serious injury. Be sure pressure
regulator has been converted.

The top burner valves have low flame/simmer
adjustment screws in the center of the control
shafts. A flashlight may be needed to locate the
screw. A small thin-blade screwdriver (approxi-
mately 3/32-in. blade width) is needed to access
the screw.

1.  Light 2 other burners and set the knob to a

Medium to Hi setting.

2.  Light the burner to be adjusted and turn the

knob to LOW.

GEA00757

3.  Remove the knob and insert a screwdriver into

the valve shaft.

4.  Turn the adjustment screw until the flame

reaches the desired size.

5.  Perform a flame stability test.

Flame Adjustments

The burners do not have air shutters adjustments
and use nonadjustable orifices. If the flame lifts off
of the burner, or if you experience “Yellow Tip”
flames and/or soot in the flames, be sure to check
the following:

1.  Gas pressure: 4-in. W.C.P. (natural) and 10-in.

W.C.P. (LP).

2.  Inspect orifice to be sure it is drilled in the

center and free of debris or burrs.

3.  Be sure the correct size orifice is in the proper

location.

4.  Make sure the cooktop was properly converted

if on LP.

5.  If the cause of sooting can not be found in the

above checks, replace the orifice with one
having a smaller diameter opening.

Testing Flame Stability

1.  Turn the knob from HI to LOW quickly. If the

LOW flame goes out, increase the flame size
and test again.

2.  With the burner on the LOW setting, open and

close the cabinet door under the cooktop. If the
flame is extinguished by the air currents cre-
ated by the door movement, increase the flame
height and test again.

Flame Recheck

After the adjustment is made, turn all burners off.
Ignite each burner individually. Observe the flame
at the HI position. Rotate the valve to the LOW
position and be sure the flame size decreases as
the valve is rotated counterclockwise.

Note: Once the conversion is complete and
checked OK, fill out the LP sticker and include
your name, organization, and date conversion was
made. Apply the sticker near the cooktop gas inlet
opening to alert others in the future that this
appliance has been converted to LP. If converting
back to natural gas from LP, please remove the
sticker so others know the appliance is set to use
natural gas.