Garland GPD SERIES GAS PIZZA OVENS - Manuel (Page 10)

Part # 1844063 Rev 1 (01/30/07) Page 10
Calibration
1. Field calibration is seldom necessary and should not
be attempted unless experience with cooking results
definitely proves that the control is not maintaining the
temperature to which the dial is set.
2. Place the thermocouple of the test instrument or
reliable mercury thermometer in the center of the oven
approximately one or two inches (25mm – 50mm) above
the hearth. Do not place the thermocouple directly in
contact with the hearth.
3. Set the thermostat temperature dial to 500 degrees
F (260 degrees C) and allow the oven temperature to
stabilize. The thermostat must be allowed to cycle twice
before taking a test reading.
4. Check the temperature when the burner just cycles
off after the second cycle, compare the reading of
thermocouple or thermometer with thermostat setting.
5. If the two do not agree (plus or minus 15 degrees F
(8 degrees C)), carefully remove the thermostat dial, not
disturbing dial settings.
6. Hold calibration plate and loosen the two calibration
screws until the plate can be moved independently of the
control.
7. Turn calibration plate so that the instrument of
thermometer reading is in line with the indicator mark.
Hold plate and tighten screws firmly.
8. Replace dial.
9. NOTE: If the above adjustment is prevented by the two
loosened calibration lock screws being in contact with
the ends of the screw clearance plate to the proper
location, reassembly screws in the other tapped holes
designed for them.
NOTE: NO ATTEMPT TO RECALIBRATE THE OVEN CONTROL
SHOULD BE MADE WITHIN THE WARRANTY PERIOD IF THE
TEMPERATURE IS WITHIN ±20 DEGREES FAHRENHEIT OF
THE DIAL SETTING. RECALIBRATION SHOULD BE MADE
IF THE CONTROL IS OUT MORE THAN ±20 DEGREES
FAHRENHEIT AND LESS THAN ±50 DEGREES FAHRENHEIT.
IF THE CONTROL IS OUT MORE THAN 50 DEGREES
FAHRENHEIT FROM THE DIAL SETTING, THE CONTROL WILL
BE REPLACED UNDER WARRANTY, (WITHIN THE WARRANTY
PERIOD).
Flame Diverters
Flame diverters distribute the heat evenly below the deck.
They must be in good condition and properly placed in
the burner chamber in order to be effective. Damaged or
improperly installed flame diverters adversely affect the
oven performance. Check them periodically and replace as
needed. Make sure that the “V” shaped diverters are pushed
all the way to the back of the oven as far as they will go.
ADJUSTMENTS Continued
2. Many of the parts used in the oven have a thin protective
oil covering. This oil should be burned off before the
oven is used for the production of food products. It is
normal for the unit to smoke while burning off excess
oil. Washing the deck of the oven with a damp clean
cloth and mild soap solution will remove some of the
protective oil coating.
Break-In
1. Once the equipment has been installed and tested by
qualified professional personnel, the oven is ready for
operation.
OPERATION