Check For Gas Leaks; Checking Manifold Pressure (If Necessary) - Thermador PROFESSIONAL Pro Grand Instructions Manual

6. FOR STANDARD BURNERS, adjust the valve screw
by turning the valve screw clockwise about an
1/8 turn. Adjust the valve screw as little as required to
reach satisfactory simmer results. Due to normal
fluctuations in gas pressure, over-adjustment of valve
screw may affect flame stability.
7. FOR EXTRALOW BURNERS, auto-cycling of the
®
XLO burners allows for exceptional simmer results
and adjustment is not required. However, adjustment
to the valve screw may be performed to suit individual
preference. Always turn OFF the power to the
appliance before adjusting flame settings. Turn the
valve stem to the LOW position for proper access to
the valve screws through clearance holes in the
potentiometers.
By-pass screw access By-pass screw access By-pass screw access
hole with valve in OFF hole with valve in OFF hole with valve in OFF
position. position. position.

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
Leak-checking should occur after the orifice conversion is
complete, and before the burner is reassembled 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. Spray a generous amount of soap and 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.)
4. Briefly turn on the valve or control while blocking the
orifice hole with a soft pencil eraser, your finger, or
something similar. It is normal to hear spark ignition
noise during this process.
English 6
By-pass screw access By-pass screw access By-pass screw access
hole with valve in LOW hole with valve in LOW hole with valve in LOW
position. position. position.
5. 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.
6. Repair all gas leaks immediately after their discovery;
this can often be accomplished by re-tightening the
orifice.
7. Since considerable torque is sometimes used during
orifice replacement, leak-check other fitting junctions
leading up to the orifice as well.
8. Turn off the gas and electrical supplies.
9. Reassemble the appliance in preparation for testing
the newly-converted burner systems.
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. Attach a portable or hand-held manometer, that reads
pressure in inches water column (WC), using a piece of
PVC or vinyl tubing.
2. Turn on the electrical and gas supplies to the
appliance.
3. Turn one of the cooktop burners to HI position. This is
important to acquire a true pressure reading under gas
flow conditions.
4. Turn the manual valve for the burner being monitored
to HI position. (Spark ignition noise will be heard
coming from this burner.)