Garland GPD Series, Installation And Operation Manual

Document #:  G_GO_OM_PYRODECK_4606131 – 12/20

Page 10

ADJUSTMENTS Continued

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, reassemble 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.

OPERATION

Break-In

1.   Once the equipment has been installed and tested by 

qualified professional personnel, the oven is ready for 

operation.

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.