Vulcan 24RRG User Manual download pdf (Page 13)

BURNER AIR SHUTTER

ADJUSTMENT

Disconnect the

electrical power to the machine and

follow lockout / tagout procedures.

Shut off the gas before servicing the

unit.

Clean pipe threads and apply thread

sealant that is suitable for use with propane gases.

All gas joints disturbed during

servicing must be checked for leaks. Check with a

soap and water solution (bubbles). Do not use an open

flame.

The efficiency of the burner depends on a delicate

balance between the air supply and volume of gas.

Whenever this balance is disturbed, poor operating

characteristics and excessive gas consumption may

occur. An air shutter on the front of the burner controls

the gas mixer balance. A yellow streaming flame on

the burner is an indication of insufficient primary air. A

proper flame should be blue in color, well-defined and

seated on the burner port. A white-blue flame is a

result of excessive primary air.

1. Remove

BURNER.

2. Loosen the shutter screw and rotate the air

shutter.

Fig. 21

3. Install burner.

4. Install GAS PRESSURE REGULATOR.

5. Connect power to machine.

6. Turn on power and rotate temperature controller

to call for heat.

7. Observe flame from back of machine.

A. If a proper flame is observed as described

in the beginning paragraph, no further

adjustment is necessary.

B. If flame is yellow tipping and lifting from

burner, continue with procedure to adjust.

8. Disconnect power.

9. Remove burner, being sure to keep shutter in the

current position.

10. Open the shutter slightly and tighten the shutter

screw.

11. Install BURNER.

12. Test machine to verify proper operation.

NOTE: The factory default air shutter positions are

half open natural; full open propane.

REGULATOR ADJUSTMENT

Shut off the gas before servicing the

unit.

All gas joints disturbed during

servicing must be checked for leaks. Check with a

soap and water solution (bubbles). Do not use an open

flame.

NOTE: Regulators come preset, but should be

checked anytime one is installed. Before adjusting

regulator, check incoming gas line pressure. Incoming

pressure must be 7-14" W.C. for natural gas and

12-14" W.C. for propane gas. If incoming pressure is

not correct, have the gas source checked and

adjusted as necessary. Make sure the regulator is

mounted in the horizontal position with the arrow

pointing in the direction of gas flow. See unit data

plate, riveted on right side panel towards front of unit,

for manifold pressure setting information. Clean vent

cap before adjusting.

RRG SERIES HEAVY DUTY GAS GRIDDLE - SERVICE PROCEDURES AND ADJUSTMENTS

Page 13 of 24 F45514 (0214)

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Vulcan 24RRG User Manual Page 13

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