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SERVICE PROCEDURES AND ADJUSTMENTS

 Never adjust the screw in the center of the

thermostat shaft. This will ruin the factory calibration;
the thermostat will no longer operate properly and
will need to be replaced.

8.

Once calibration is achieved, tighten the
temperature dial screws and knob set screws.

9.

Repeat steps 3 thru 8 for each zone.

PILOT ADJUSTMENT

Using a flathead screwdriver, turn the slotted pilot
adjustment screw clockwise to decrease the flame,
and counterclockwise to increase the flame.

GAS PRESSURE

MEASUREMENT

1.

Turn the gas supply off at a manual shutoff
valve.

2.

Remove the control panel.

3.

Remove the pressure tap plug and attach
manometer.

4.

Turn gas back on.

5.

Light pilot(s).

6.

Turn all thermostats on to the maximum setting
so that all burners are on.

7.

Turn all the equipment on the same supply line
on.

8.

Check gas pressure.

9.

Gas pressure should read 4” W.C. for natural
and 10” W.C. for propane gas. If not correct,
refer to GAS REGULATOR ADJUSTMENT.

10. Turn gas supply off, disconnect manometer and

reinstall pressure tap plug.

GAS PRESSURE REGULATOR

ADJUSTMENT

A gas pressure regulator is supplied with the griddle
and must be installed as close to the griddle on the
gas supply line as possible. Make sure that the arrow
on the underside of the regulator is oriented in the
direction of gas flow to the griddle and the regulator
is positioned with the vent plug and adjustment
screw upright. Check that vent plug is not clogged by
grease and debris.

Check and set the gas pressure after the regulator is
installed. The pressure should be set for 4” water
column (W.C.) for natural gas and 10” W.C. for
propane gas while all burners are on. 

924RX SHOWN

F25383 (510)

Page 10 of 16

Содержание 924RX

Страница 1: ...Service Technician The reproduction transfer sale or other use of this Manual without the express written consent of Vulcan is prohibited This manual has been provided to you by ITW Food Equipment Gr...

Страница 2: ...mentary Power Switch 900rx 5 Electric Igniter 900rx 6 BASO Safety Valve 6 Thermostat Valve Assembly 6 Burner 8 Pilot Thermocouple Assembly 8 SERVICE PROCEDURES AND ADJUSTMENTS 9 Calibration 9 Pilot Ad...

Страница 3: ...at is controlled by a momentary power switch The power switch turns the electric ignition system off and on only and will only supply power to the igniters when held down in the ON position The burner...

Страница 4: ...421 or equivalent Adapter to test thermocouple Johnstone Supply Part No H23 226 or equivalent COMPONENT LOCATION 1 Pilot electric ignition system control switch RX only 2 Power cord RX only 3 Thermost...

Страница 5: ...h the front panel to see both pilot burners and griddle burners Move any flexible gas tubing or capillary tubing that may obstruct the sight holes Back Panel NOTE It will be necessary to remove the ba...

Страница 6: ...d pipe and valve for reassembly later NOTE Ignition wires must be routed in front of valves as shown to prevent them from touching hot heat shield 3 Disconnect all gas lines and thermocouple from valv...

Страница 7: ...om old capillary tube and install on new thermostat 8 Secure end of insulator sleeve to thick end of capillary tube with metal tape as shown 9 Slide capillary tube all the way into slot underneath gri...

Страница 8: ...n reverse order 6 Adjust as outlined in BURNER ADJUSTMENT PILOT THERMOCOUPLE ASSEMBLY 1 Remove FRONT PANEL 2 From underneath the front of the griddle remove screw securing pilot assembly bracket 3 Car...

Страница 9: ...he griddle with all points located 12 back from the front edge of the griddle plate NOTE Use of infrared thermometers is not recommended These devices are highly sensitive to surface color clean or di...

Страница 10: ...so that all burners are on 7 Turn all the equipment on the same supply line on 8 Check gas pressure 9 Gas pressure should read 4 W C for natural and 10 W C for propane gas If not correct refer to GAS...

Страница 11: ...ADJUSTMENT For efficient burner operation it is important that a proper balance of gas volume and primary air supply is maintained to give complete combustion Insufficient air supply results in a yell...

Страница 12: ...meter lead to pin on thermocouple adapter and meter lead to thermocouple 5 Light pilot flame 6 Verify that thermocouple is sufficiently immersed in flame Adjust pilot valve to allow more gas flow if...

Страница 13: ...ELECTRICAL OPERATION ELECTRICAL OPERATION ELECTRICAL DIAGRAM F25383 510 Page 13 of 16...

Страница 14: ...ELECTRICAL OPERATION F25383 510 Page 14 of 16...

Страница 15: ...pressure incorrect or fluctuating 2 Obstructed flue 3 Gas orifice obstructed improperly aligned spaced or incorrect 4 Burner malfunction One or more burners have lower flame level than the others 1 Ch...

Страница 16: ...TROUBLESHOOTING F25383 510 Printed in USA...

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