Garland GAS PIZZA OVENS User Manual download pdf (Page 10)

Part # 1844063 (08/06)Page 10

good mixture of air and gas. When using LP gas the

ﬂame will have a blue yellow appearance. Follow steps

 thru  to adjust the ﬂame for good quality.

1. Loosen the small knurled locking disk.

2. Turn the large adjusting disk towards the air mixture

throat to reduce the opening. is restricts the

amount of air, causing the ﬂame to turn yellow.

3. Turn the adjusting disk gradually out, away from

the air mixer throat, allowing more air into the air

mixer until the yellow disappears and a sharp blue

ﬂame appears.

4. When the ﬂame turns blue and spreads out, turn

the locking disk tight against the adjusting disk.

ere may be intermittent yellow-orange ﬂame

noticed. is is caused by dust particles burning in

the Flame. Should the burners fail to light, check

to see if there is a problem with any or all of the

following.

A. e gas supply: If there are other gas appliances on

the same supply line, shut them oﬀ temporarily and

see if the ﬂame comes back on, or if it ﬂuctuates as

other gas appliances are turned on and oﬀ. If so, it

would indicate overloading of the gas supply or a

faulty gas pressure regulator. You should contact a

qualiﬁed service agency or the local gas company to

check the gas supply.

B. Dirty burner oriﬁce or ports: With the oven cold,

use a thin wire to check that the spud oriﬁce (nozzle)

is clear. If necessary, loosen and remove the spud.

Be careful when cleaning not to enlarge the hole.

en, using a wire or thin nail, clear the burner

ports of carbon deposits or other restrictions.

Periodically, after breaking the ovens in, check the burner

ﬂame and readjust the air mixture if needed. Black soot

on the oven doors or in the burner compartment may

indicate that not enough air is mixing with the gas. If

this case back oﬀ the air adjustment disk until the proper

ﬂame and color is set.

By-Pass Flame Adjustment

e by-pass in the thermostat is a small gas supply

through the control that is independent of the dial

setting. It is controlled strictly by the Adjusting Screw.

is small gas supply maintains a minimum ﬂame or

the burner(s), helping to maintain the heat in the oven

and assisting in recovery. is adjustment is best done

when the oven is being heated for the day’s business. To

adjust the by-pass ﬂame follow steps  thru .

1. Turn the oven on and set the thermostat to the

desired temperature.

2. Allow the oven to pre-heat until the burner ﬂame

begins to throttle down.

3. At this point, turn the thermostat dial all the way

down. is ensures that the thermostat is in the by-

pass mode. ere should now be a small steady ﬂame

remaining across the burner without ﬂickering or

going out.

NOTE: It may be necessary to turn the thermostat back

up to relight the burner(s) if there is not ﬂame present.

4. Using a small screwdriver, reach through the access

hold on the control panel to the left of the thermostat

knob. Turn the by-pass adjustment screw to raise

or lower the by-pass ﬂame as required. Counter-

clockwise raises the ﬂame, clockwise lowers the

ﬂame. Take care not to turn the screw out too far

as that will allow gas to leak around the adjustment

screw.

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.

ADJUSTMENTS Continued

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 27 28

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Garland GAS PIZZA OVENS User Manual Page 10

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