Thermador PROFESSIONAL Pro Harmony PRD305PH Manuel D'instructions page 6

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. Flip the stem over to
the "LP" end, and snap the plunger back into the
cap, as shown.
3. Re-install conversion cap, configured for LP gas, back
into top of the regulator.
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
English 4
Brass Cap
Sealing Washer
Plunger
Regulator Body
.
2. The five orifices are stamped. Replace the burner jet
orifices as follows:
70 70 70
64 64 64
BURNER LOCATION
Left Front Burner
Left Rear Burner
Right Rear Burner
Center Burner
Right Front Burner
IMPORTANT: DO NOT install the orifices at any other
burner location than as listed.
• All of the replacement orifices in the conversion kit
have straight threads (not pipe threads) and do not
require thread sealing compound.
3. Perform a gas leakage test of each orifice and
associated supply tube fittings. See "Setting Valve
Screws" on page 5.
• Leak-checking should occur after the orifice
conversion is complete, and before the burner is
reassembled and tested.
Reassemble the Cooktop
1. For the single piece ignitor, carefully feed the wires
through the heat shields, if applicable. Ensure that the
ignitor wires do not crimp.
For the two piece ignitor, reinstall the heat shield, if
applicable (wire feed not necessary).
2. For the single piece ignitor, carefully feed the wires
through the spill trays. Ensure that the ignitor wires do
not crimp.
For the two piece ignitor, reinstall the spill trays (wire
feed not necessary).
3. Reinstall the Flush Island Trim with T-20 Torx screws.
4. For the single piece ignitor, carefully feed the ignitor
wires through the burner pedestals.
For the two piece ignitor, reinstall the burner pedestals
(wire feed not necessary).
70 70 70
62 62 62
1.1 1.1 1.1
ORIFICE NUMBER
Jet Orifice #64
Jet Orifice #70
Jet Orifice #70
Jet Orifice #62
Jet Orifice 1.1mm