Installation guide
31-10755-4
23
4
CHANGE GRILL ORIFICE (Cont.)
  A.   Remove the grill cover, grates and 
grate frame. Lift the radiant baffle 
straight up and off.
  B.   Remove the 2 hex 
head screws from the 
top of the igniter.
    • Remove one screw 
from each side of the 
burner surround.
    • Lift out the surround.
  C.   Carefully push the 
igniter aside and 
under the burner. 
Do not pull or pinch 
the wire.
 Remove 4 burner 
attachment screws, 
2 at the front and 
2 at the back. 
Slide the burner 
assembly toward 
the back and out of 
the gas inlet.
  D.  Use a 1/2” deep well 
socket to remove and 
replace the orifice .
 Reverse these steps 
to re-assemble the 
grill. Be sure to place 
the unused orifice in 
the holder for possible 
future use. 
  E. Adjust Grill “LO” Setting
    • Make certain gas and electricity to unit are turned off.
    • Turn the grill knob to LO and remove the knob by 
pulling straight off.
    • Insert a small flat-blade screwdriver into the hole in the 
center of the valve stem to engage set screw.
    • To convert the LO setting from natural gas to LP, turn 
the screw clockwise until it stops 
(about 3/4 turn). It may be necessary 
to grasp the exterior of the valve 
stem with a pair of pliers to prevent 
the valve stem from rotating as the 
set screw is adjusted.
    • To convert the LO setting from the LP 
to natural gas setting, turn the screw 
counterclockwise about 3/4 turn.
4
CHANGE GRILL ORIFICE (if present)
Locate the 1–1/2” long Grill orifice.  
Select the proper orifice size for your gas and 
burner from the conversion chart.
Installation Instructions for Gas Conversion
Burner 
Surround
Igniter
Burner 
Assembly
3
CHANGE BURNER ORIFICES (cont.)
 IMPORTANT:  Find your model number below. Read 
each orifice label to identify and install them in the 
exact locations shown.
A.   Return the unused orifices to the holder. Reattach 
the holder and the instruction sheet with screw in 
the original storage location.
 B. Replace the burner heads, caps and top grates
. 
On range models, replace rear vent trim.
ZGP304 SIMMER ORIFICES
ZGP304 MAIN ORIFICES
A 34SL or 51SN orifice 
will be used on all burners.
A 84XL or 126HXN 
orifice will be 
used on these 
three burners.
Use a 108XL or 
190XN orifice for 
the right front 
burner.
Remove 
2 hex 
head 
screws
Surround 
Screws
Front of Range
ZGP364, ZGP366, ZGP484, ZGP486
SIMMER 
ORIFICES
A 34SL or 51SN orifice 
will be used on all 
burners.
Use 108XL or 
190XN orifices for 
all burners.
MAIN 
ORIFICES










