Step 5: Check For Gas Leaks; Step 6: Burner Testing And Adjustment; Checking Manifold Pressure (If Necessary) - Thermador PROFESSIONAL PRO GRAND Serie Manual De Instrucciones

Step 5: Check for Gas Leaks

WARNING:
DO NOT use a flame of any kind to check for
gas leaks.
Gas leakage checking using a liquid
solution:
The replacement orifices in the LP conversion kit, have
straight threads (not pipe threads) and do not require
thread sealing compound.
Leak-checking should occur after the orifice conversion is
complete, and before the burner is re-assembled and
tested.
1. Make sure that all of the LP orifices have been
tightened and that all valves and controls are in the
OFF position.
2. Turn on electrical and gas supplies.
3. Briefly evaluate the threaded connection of each
replaced orifice individually—that is, one orifice at a
time.
4. Spray a generous amount of soap & water mixture—or
other solution designed for checking gas leaks—on the
threaded junction at the base of the orifice. Avoid
spraying electrical devices. (A 25% dishwashing liquid
to water mixture is effective for this.)
5. Briefly turn on the valve or control while blocking the
orifice hole with a soft pencil eraser, your finger, or
something similar.
Note: It is normal to hear spark ignition noise during this
process.
6. Monitor the base of the orifice junction to see if bubbles
are forming anywhere around the threaded connection.
• Bubbles forming are indications of gas leaks. The
amount and sizes of the bubbles are indications of
the severity of the leakage.
7. Repair all gas leaks immediately after their discovery;
this can often be accomplished by re-tightening the
orifice.
8. Since considerable torque is sometimes used during
orifice replacement, leak-check other fitting junctions
leading up to the orifice as well.
9. Turn off the gas and electrical supplies.
10. Re-assemble the appliance in preparation for testing
the newly-converted burner systems.
Step 6: Burner Testing and
Adjustment
Checking manifold pressure
(if necessary):
Checking the appliance manifold pressure is NOT
REQUIRED for the Propane Gas conversion; however, if
the outlet pressure of the gas regulator or the inlet pressure
to the appliance is suspect, the following procedure can be
used to check the manifold pressure.
1. A manifold pressure measurement can be acquired at
®
one of the Star burner orifices, as shown.
2. Attach a portable or hand-held manometer, that reads
pressure in inches water column ("WC), using a piece
of PVC or vinyl tubing.
3. Turn on the electrical and gas supplies to the range.
4. Turn on one of the top burners to HI position. This is
important to acquire a true pressure reading under gas
flow conditions.
5. Turn the manual valve for the burner being monitored
to HI position. (Spark ignition noise will be heard
coming from this burner.)
6. The manifold pressure reading on the manometer
should be between 9.50 and 10.50 inch WC for an
appliance regulator converted to LP gas.
• If the manifold pressure reading is below this
range, verify that the regulator has been properly
converted for use with LP gas, and that the inlet
pressure to the appliance is between 11.0 and 14.0
inch WC.
English 9