Product manual

8
SERVICE / REPAIR
NOTE: THIS APPLIANCE MUST ONLY BE SERVICED BY AN AUTHORIZED AGENT.
NOTE: Parts protected by the manufacturer or his agent are not to be adjusted by the installer unless
the installer is an authorized service agent.
If you have any questions or problems contact your nearest APW/Wyott
Service Representative.
Gas Valve Adjustment (Manual Valves):
The manual gas valve is at full on when turned counter-clockwise approximately 1/4 turn. This valve can
be turned down to the point where the flame flickers over the burner but does not extinguish if temperatures
below 300 degrees F are required.
Gas Valve Adjustment (BJWA Valves):
By-Pass Adjustment Instructions:
1. Light burner, turn the dial to full on.
2. After 5 minutes, turn dial clockwise to a point slightly beyond the first mark on the dial.
3. With a screwdriver, turn the by-pass adjustor counter-clockwise to increase the flame, clockwise to
decrease it, until there is a minimum flame over the entire burner. A flame height of between 3/16
and 1/4 inch tall is acceptable.
4. If the burners are turned to full on, the flame height should increase. Leave the flame at full on for a
few minutes. Then, decrease the setting to low. The flame should decrease to the height that you
just set.
NOTE: The regulating valve, with by-pass flame used on the GGT-style griddles, works best at tempera-
tures above 300 degrees F. If you need temperatures below 300 deg. F, the by-pass flame can be turned
off.
To turn off the by-pass flame, turn the adjuster screw clockwise until it meets resistance. DO NOT OVER
TIGHTEN. The valve will still regulate the temperature with the by-pass turned off. DO NOT TURN
SCREW COUNTER-CLOCKWISE more than one turn. Turning the adjuster screw to far counter-clockwise
will allow a gas leak around the screw that will cause a fire hazard.
To Recalibrate the Griddle Control:
1. Recalibration should not be undertaken until the by-pass flame has been adjusted.
2. Light unit and set dial to the 350 degrees F. After the burner has been on about 15 minutes, check
temperature. Continue to check the temperature at 5 minute intervals until 2 successive readings are
within 5 degrees of each other. The control should be recalibrated if your readings are not within 10
degrees of the dial setting.
(Continued on page 9)
CONVERSION (Not Available in the European Community
Instructions are for conversion from Natural Gas to Propane (L.P.) on all models GGT and GGM.
The conversion should b done before connecting the unit to the gas supply.
1. Remove the knobs and front panel.
2. Remove the supply tubes that go between the valves and the orifice fittings.
3. Remove the orifice fittings from the firebox. Change the orifices to the size recommended for propane
(L.P.).
4. Replace the orifice fittings into the firebox.
5. Replace the supply tubes between the valves and the orifice fittings.
6. Replace the front panel, grease drawer and knobs.
7. Reverse plug in pressure regulator. The marking on the plug facing out should match gas supply.
8. Continue with the installation.
9
(Continued from page 8)
3. If recalibration is required, the additional steps to be taken are:
a. Remove the dial and D-stem. Push the calibration stem inward with a screwdriver, while holding the
calibration stem firmly in, turn slowly clockwise to obtain a lower temperature or counter-clockwise
for a higher temperature. Each mark on the retainer represents 25 degrees in temperature. Re
place dial and D-stem.
b. Set dial at 400 degree mark. Check temperature again, as instructed above. If the temperature is
not within 20 degrees of the dial setting (400 deg.), it means that the sensing element is inoperative
and the control should be replaced.
* NOTE: Turning the calibration stem to far will disassemble the inside of the valve. This negates the
warranty.