Replacing The Burner Orifices - Thermador PROFESSIONAL Pro Grand Instructions Manual

1. Remove conversion cap with a 7/8" socket or wrench.
2. Read the letters on the stem. You will see "NAT" at the
bottom of the stem. Snap-out the plunger from bottom
of the conversion cap.
3. Flip the stem over to the "LP" end, and snap the
plunger back into the cap, as shown.
4. Re-install conversion cap, configured for LP gas, back
into top of the regulator.
English 4
Brass Cap
Sealing Washer
Plunger
Regulator Body
Replace the Burner Orifices
1. Use a 7 mm or a 9/32" socket with 1/4" nut driver to
reach down through the jet holders and remove the
Natural Gas orifice from the burner's jet holder
2. Five orifices are stamped "1.15" (1.15 mm orifice
diameter) and one orifice is stamped "1.25" (1.25 mm
orifice diameter).
1.15 x 5
Replace the right-front burner orifice (XHI) with the
1.25 mm LP burner orifice. Replace the remaining
®
STAR burner jet orifices with one of the 1.15 mm LP
jet orifices.
• All of the replacement orifices in the conversion kit
have straight threads (not pipe threads) and do not
require thread sealing compound.
IMPORTANT: DO NOT install the 1.25 mm LP orifice at
any other burner location than the right-front position.
1.15 1.15 1.15 1.15 1.15 1.15
1.15 1.15 1.15 1.15 1.15 1.15
3. Perform a gas leakage test of each orifice and
associated supply tube fittings. See "Check for Gas
Leaks" on page 6.
• Leak-checking should occur after the orifice
conversion is complete, and before the burner is
reassembled and tested.
.
1.25 x 1
1.15 1.15 1.15
1.25 1.25 1.25